ARDS / Aridis Pharmaceuticals, Inc. - Depositi SEC, Relazione annuale, dichiarazione di delega

Aridis Pharmaceuticals, Inc.
US ˙ OTCPK ˙ US0403341045

Statistiche di base
CIK 1614067
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to Aridis Pharmaceuticals, Inc.
SEC Filings (Chronological Order)
Questa pagina fornisce un elenco completo e cronologico dei depositi SEC, esclusi i documenti di proprietà che forniamo altrove.
November 14, 2024 SC 13G/A

ARDS / Aridis Pharmaceuticals, Inc. / ARMISTICE CAPITAL, LLC Passive Investment

SC 13G/A 1 armistice-ards093024a2.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 2)* Aridis Pharmaceuticals, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 040334104 (CUSIP Number) September 30, 2024 (Date of Event Which Requires Filing of this Statement) Check the appropriate box

June 27, 2024 EX-10.1

SECURITIES PURCHASE AGREEMENT

Exhibit 10.1 SECURITIES PURCHASE AGREEMENT This Securities Purchase Agreement (this “Agreement”) is dated as of June 24th, 2024 (the “Effective Date”), between Aridis Pharmaceuticals, Inc., a Delaware corporation (the “Company”), and each purchaser identified on the signature pages hereto (each, including its successors and assigns, a “Purchaser” and collectively, the “Purchasers”). WHEREAS, subje

June 27, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) June 24, 2024 Aridis Pharmaceutica

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) June 24, 2024 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commissi

February 14, 2024 SC 13G/A

ARDS / Aridis Pharmaceuticals, Inc. / ARMISTICE CAPITAL, LLC Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No.

February 13, 2024 SC 13G/A

ARDS / Aridis Pharmaceuticals, Inc. / Lind Global Fund II LP Passive Investment

SC 13G/A 1 sch13g.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* Aridis Pharmaceuticals, Inc. (Name of Issuer) Common Stock, par value $0.0001 per share (Title of Class of Securities) 040334104 (CUSIP Number) December 31, 2023 (Date of Event which Requires Filing of this Statement) Check the appr

February 13, 2024 EX-99.1

JOINT FILING AGREEMENT

EX-99.1 2 exhibit99-1.htm JOINT FILING AGREEMENT BY AND AMONG THE REPORTING PERSONS Exhibit 99.1 JOINT FILING AGREEMENT The undersigned hereby agree that a single Schedule 13G (or any amendment thereto) relating to the Common Stock, par value $0.0001 per share, of Aridis Pharmaceuticals, Inc. shall be filed on behalf of each of the undersigned and that this Agreement shall be filed as an exhibit t

January 16, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) January 12, 2024 Aridis Pharmaceut

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) January 12, 2024 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commi

December 18, 2023 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy State

December 18, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) December 16, 2023 Aridis Pharmaceu

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) December 16, 2023 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Comm

December 18, 2023 EX-3.1

AMENDMENT TO THE ARIDIS PHARMACEUTICALS, INC. (the “Corporation”)

Exhibit 3.1 AMENDMENT TO THE BYLAWS OF ARIDIS PHARMACEUTICALS, INC. (the “Corporation”) Section 2.6 of Article II of the Bylaws of the Corporation (the “Bylaws”), is hereby amended and restated in its entirety as follows: “2.6. Quorum. “Except as otherwise required by law, the holders of record representing 1/3 of the voting interest of the shares of stock of the Corporation entitled to be voted t

December 15, 2023 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy State

November 6, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number: 001-38630 Aridis Pharmaceuticals, Inc. (Exact Nam

November 3, 2023 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Definitive Proxy State

November 3, 2023 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy State

November 3, 2023 EX-99.1

Aridis Pharmaceuticals Announces Third Quarter 2023 Financial Results and Business Update Received two grant awards from the National Institute of Allergy and Infectious Diseases, a division of the National Institutes of Health

Exhibit 99.1 Aridis Pharmaceuticals Announces Third Quarter 2023 Financial Results and Business Update Received two grant awards from the National Institute of Allergy and Infectious Diseases, a division of the National Institutes of Health LOS GATOS, Calif., November 3, 2023 (Globe Newswire) - Aridis Pharmaceuticals, Inc. (OTCQB: ARDS), a biopharmaceutical company focused on the discovery and dev

November 3, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) November 3, 2023 Aridis Pharmaceut

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) November 3, 2023 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commi

September 14, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number: 001-38630 Aridis Pharmaceuticals, Inc. (Exact Name of

September 7, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) September 7, 2023 Aridis Pharmaceu

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) September 7, 2023 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Comm

August 25, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) August 21, 2023 Aridis Pharmaceuti

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) August 21, 2023 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commis

August 9, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) August 4, 2023 Aridis Pharmaceutic

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) August 4, 2023 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction (Commission (I. R. S. Empl

August 4, 2023 424B5

7,207,208 Shares of Common Stock Aridis Pharmaceuticals, Inc.

Filed Pursuant to Rule 424(b)(5) Registration No. 333-233601 PROSPECTUS SUPPLEMENT (To Prospectus Dated December 14, 2022) 7,207,208 Shares of Common Stock Aridis Pharmaceuticals, Inc. This prospectus supplement updates, supersedes and amends certain information contained in the prospectus t dated December 14, 2022 (the “Original Prospectus”), relating to the resale offering of an aggregate of 7,2

August 4, 2023 424B5

2,473,778 Shares of Common Stock Aridis Pharmaceuticals, Inc.

Filed Pursuant to Rule 424(b)(5) Registration No. 333-233601 PROSPECTUS SUPPLEMENT (To Prospectus Dated September 5, 2019) 2,473,778 Shares of Common Stock Aridis Pharmaceuticals, Inc. This prospectus supplement updates, supersedes and amends certain information contained in the prospectus supplement dated August 2, 2021 (the “Original Prospectus”), relating to the offering of an aggregate of 1,30

August 3, 2023 424B5

4,000,000 Shares of Common Stock 6,000,000 Pre-Funded Warrants to Purchase up to 6,000,000 Shares of Common Stock 10,000,000 Warrants to Purchase up to 10,000,000 Shares of Common Stock Up to 16,000,000 Shares of Common Stock underlying the Pre-Funde

Filed Pursuant to Rule 424(b)(5) Registration No. 333-272128 Prospectus 4,000,000 Shares of Common Stock 6,000,000 Pre-Funded Warrants to Purchase up to 6,000,000 Shares of Common Stock 10,000,000 Warrants to Purchase up to 10,000,000 Shares of Common Stock Up to 16,000,000 Shares of Common Stock underlying the Pre-Funded Warrants and Warrants Aridis Pharmaceuticals, Inc. We are offering 4,000,000

July 31, 2023 CORRESP

Aridis Pharmaceuticals, Inc. 983 University Avenue, Bldg. B Los Gatos, CA 95032

Aridis Pharmaceuticals, Inc. 983 University Avenue, Bldg. B Los Gatos, CA 95032 July 31, 2023 VIA EDGAR United States Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549 Attention: Dillon Hagius Re: Aridis Pharmaceuticals, Inc. Form S-1 File No. 333-272128 Ladies and Gentlemen: Pursuant to Rule 461 of the General Rules and Regulations under the Securities Act of 1933, as a

July 31, 2023 S-1/A

As filed with the U.S. Securities and Exchange Commission on July 28, 2023.

As filed with the U.S. Securities and Exchange Commission on July 28, 2023. Registration Statement No. 333-272128 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 Amendment No. 7 to FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ARIDIS PHARMACEUTICALS, INC. (Exact name of registrant as specified in its charter) Delaware 2834 47-2641188 (State or other juris

July 26, 2023 S-1/A

As filed with the U.S. Securities and Exchange Commission on July 26, 2023.

As filed with the U.S. Securities and Exchange Commission on July 26, 2023. Registration Statement No. 333-272128 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 Amendment No. 6 to FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ARIDIS PHARMACEUTICALS, INC. (Exact name of registrant as specified in its charter) Delaware 2834 47-2641188 (State or other juris

July 26, 2023 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables FORM S-1 (Form Type) ARIDIS PHARMACEUTICALS, INC.

July 21, 2023 EX-10.39

Form of Securities Purchase Agreement

Exhibit 10.39 SECURITIES PURCHASE AGREEMENT This Securities Purchase Agreement (this “Agreement”) is dated as of July , 2023, between Aridis Pharmaceuticals, Inc., a Delaware corporation (the “Company”), and each purchaser identified on the signature pages hereto (each, including its successors and assigns, a “Purchaser” and collectively the “Purchasers”). WHEREAS, subject to the terms and conditi

July 21, 2023 S-1/A

As filed with the U.S. Securities and Exchange Commission on July 21, 2023.

As filed with the U.S. Securities and Exchange Commission on July 21, 2023. Registration Statement No. 333-272128 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 Amendment No. 5 to FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ARIDIS PHARMACEUTICALS, INC. (Exact name of registrant as specified in its charter) Delaware 2834 47-2641188 (State or other juris

July 21, 2023 EX-4.1

Form of Warrant

Exhibit 4.1 EXHIBIT A-2 COMMON STOCK PURCHASE WARRANT Aridis Pharmaceuticals, Inc. Warrant Shares: Initial Exercise Date: July , 2023 THIS COMMON STOCK PURCHASE WARRANT (the “Warrant”) certifies that, for value received, or its assigns (the “Holder”) is entitled, upon the terms and subject to the limitations on exercise and the conditions hereinafter set forth, at any time on or after the date her

July 21, 2023 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables FORM S-1 (Form Type) ARIDIS PHARMACEUTICALS, INC.

July 20, 2023 CORRESP

Aridis Pharmaceuticals, Inc. 983 University Avenue, Bldg. B Los Gatos, CA 95032

Aridis Pharmaceuticals, Inc. 983 University Avenue, Bldg. B Los Gatos, CA 95032 July 20, 2023 VIA EDGAR United States Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549 Attention: Dillon Hagius Re: Aridis Pharmaceuticals, Inc. Form S-1 File No. 333-272128 Ladies and Gentlemen: Aridis Pharmaceuticals, Inc. (the “Company”) hereby respectfully withdraws its request, dated Ju

July 20, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) July 19, 2023 Aridis Pharmaceutica

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) July 19, 2023 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commissi

July 18, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) July 17, 2023 Aridis Pharmaceutica

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) July 17, 2023 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commissi

July 17, 2023 S-1/A

As filed with the U.S. Securities and Exchange Commission on July 17, 2023.

As filed with the U.S. Securities and Exchange Commission on July 17, 2023. Registration Statement No. 333-272128 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 Amendment No. 4 to FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ARIDIS PHARMACEUTICALS, INC. (Exact name of registrant as specified in its charter) Delaware 2834 47-2641188 (State or other juris

July 17, 2023 S-1/A

As filed with the U.S. Securities and Exchange Commission on July 17, 2023.

As filed with the U.S. Securities and Exchange Commission on July 17, 2023. Registration Statement No. 333-272128 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 Amendment No. 3 to FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ARIDIS PHARMACEUTICALS, INC. (Exact name of registrant as specified in its charter) Delaware 2834 47-2641188 (State or other juris

July 17, 2023 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables FORM S-1 (Form Type) ARIDIS PHARMACEUTICALS, INC.

July 17, 2023 CORRESP

Aridis Pharmaceuticals, Inc. 983 University Avenue, Bldg. B Los Gatos, CA 95032

Aridis Pharmaceuticals, Inc. 983 University Avenue, Bldg. B Los Gatos, CA 95032 July 17, 2023 VIA EDGAR United States Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549 Attention: Dillon Hagius Re: Aridis Pharmaceuticals, Inc. Form S-1 File No. 333-272128 Ladies and Gentlemen: Pursuant to Rule 461 of the General Rules and Regulations under the Securities Act of 1933, as a

July 17, 2023 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables FORM S-1 (Form Type) ARIDIS PHARMACEUTICALS, INC.

June 27, 2023 EX-10.39

Form of Securities Purchase Agreement

Exhibit 10.39 SECURITIES PURCHASE AGREEMENT This Securities Purchase Agreement (this “Agreement”) is dated as of , 2023, between Aridis Pharmaceuticals, Inc., a Delaware corporation (the “Company”), and each purchaser identified on the signature pages hereto (each, including its successors and assigns, a “Purchaser” and collectively the “Purchasers”). WHEREAS, subject to the terms and conditions s

June 27, 2023 EX-4.1

Form of Warrant

Exhibit 4.1 COMMON STOCK PURCHASE WARRANT Aridis Pharmaceuticals, Inc. Warrant Shares: Issue Date: , 2023 THIS COMMON STOCK PURCHASE WARRANT (the “Warrant”) certifies that, for value received, or its assigns (the “Holder”) is entitled, upon the terms and subject to the limitations on exercise and the conditions hereinafter set forth, at any time on or after the Stockholder Approval Date (as define

June 27, 2023 CORRESP

*****

Sheppard, Mullin, Richter & Hampton LLP 30 Rockefeller Plaza New York, New York 10112-0015 212.

June 27, 2023 S-1/A

As filed with the U.S. Securities and Exchange Commission on June 27, 2023.

As filed with the U.S. Securities and Exchange Commission on June 27, 2023. Registration Statement No. 333-272128 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 Amendment No. 2 to FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ARIDIS PHARMACEUTICALS, INC. (Exact name of registrant as specified in its charter) Delaware 2834 47-2641188 (State or other juris

June 27, 2023 EX-4.2

Form of Pre-Funded Warrant

Exhibit 4.2 PREFUNDED COMMON STOCK PURCHASE WARRANT Aridis Pharmaceuticals, Inc. Warrant Shares: Initial Exercise Date: , 2023 THIS PREFUNDED COMMON STOCK PURCHASE WARRANT (the “Warrant”) certifies that, for value received, or its assigns (the “Holder”) is entitled, upon the terms and subject to the limitations on exercise and the conditions hereinafter set forth, at any time on or after the date

June 23, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) June 16, 2023 Aridis Pharmaceutica

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) June 16, 2023 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commissi

June 9, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) June 8, 2023 Aridis Pharmaceutical

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) June 8, 2023 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commissio

June 9, 2023 EX-99.1

Aridis Pharmaceuticals Announces First Quarter 2023 Financial Results and Business Update

Exhibit 99.1 Aridis Pharmaceuticals Announces First Quarter 2023 Financial Results and Business Update LOS GATOS, Calif., June 8, 2023 /PRNewswire/ — Aridis Pharmaceuticals, Inc. (Nasdaq: ARDS), a biopharmaceutical company focused on the discovery and development of novel anti-infective therapies for treating life-threatening infections, today reported financial and corporate results for its first

June 9, 2023 S-1/A

As filed with the U.S. Securities and Exchange Commission on June 9, 2023.

As filed with the U.S. Securities and Exchange Commission on June 9, 2023. Registration Statement No. 333-272128 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 Amendment No. 1 to FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ARIDIS PHARMACEUTICALS, INC. (Exact name of registrant as specified in its charter) Delaware 2834 47-2641188 (State or other jurisd

June 8, 2023 10-Q

Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number: 001-38630 Aridis Pharmaceuticals, Inc. (Exact Name of

May 25, 2023 8-K

Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing, Changes in Registrant's Certifying Accountant, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) May 21, 2023 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commissio

May 25, 2023 EX-16.1

Letter from Baker Tilly US, LLP dated May 24, 2023

Exhibit 16.1

May 22, 2023 S-1

Power of Attorney (included on signature page)

As filed with the U.S. Securities and Exchange Commission on May 22, 2023. Registration Statement No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ARIDIS PHARMACEUTICALS, INC. (Exact name of registrant as specified in its charter) Delaware 2834 47-2641188 (State or other jurisdiction of incorporation o

May 22, 2023 EX-21.1

Subsidiaries of the Registrant (filed with the Registrant’s Annual Report on Form 10-K on May 22, 2023 and incorporated herein by reference)

Exhibit 21.1 List of Subsidiaries of Aridis Pharmaceuticals, Inc.: Name Jurisdiction of Incorporation/Formation Aridis Biopharmaceuticals LLC Delaware Aridis Pharmaceuticals C.V. Netherlands

May 22, 2023 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables FORM S-1 (Form Type) Aridis Pharmaceuticals, Inc.

May 22, 2023 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark one) ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended December 31, 2022 Or ☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-38630 Aridis Pharmace

May 16, 2023 NT 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 12b-25 Commission File Number: 001-38630 NOTIFICATION OF LATE FILING

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 12b-25 Commission File Number: 001-38630 NOTIFICATION OF LATE FILING ☐ Form 10-K ☐ Form 20-F ☐ Form 11-K ☒ Form 10-Q ☐ Form 10-D ☐ Form N-SAR ☐ Form N-CSR For Period Ended: March 31, 2023 ☐ Transition Report on Form 10-K ☐ Transition Report on Form 10-Q ☐ Transition Report on Form 20-F ☐ Transition Report on Form N-SAR ☐

May 9, 2023 8-K

Termination of a Material Definitive Agreement

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) May 3, 2023 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commission

May 1, 2023 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) April 26, 2023 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commiss

May 1, 2023 EX-10.1

Form of Note Purchase Agreement dated as of April 26, 2023 (incorporated by reference to Exhibit 10.1 filed with Form 8-K on May 1, 2023)

Exhibit 10.1 Note Purchase And Loan Restructuring Agreement This Note Purchase and Loan Restructuring Agreement (this “Agreement”), dated as of April 26, 2023, is entered into by and among Aridis Pharmaceuticals, Inc., a Delaware corporation (“ARDS Inc.”), Aridis Biopharmaceuticals, LLC, a Delaware limited liability company (“ARDS LLC”), Aridis Pharmaceuticals, C.V., a Netherlands partnership (“AR

May 1, 2023 EX-10.2

Form of Security Agreement dated as of April 26, 2023 (incorporated by reference to Exhibit 10.2 filed with Form 8-K on May 1, 2023)

Exhibit 10.2 Security Agreement This Security Agreement (this “Agreement”), dated as of April 26, 2023, is executed by Aridis Pharmaceuticals, Inc., a Delaware corporation (“ARDS Inc.”), Aridis Biopharmaceuticals, LLC, a Delaware limited liability company (“ARDS LLC”), and Aridis Pharmaceuticals, C.V., a Netherlands partnership (“ARDS CV,” and together with ARDS Inc. and ARDS LLC, “Debtor”), in fa

May 1, 2023 EX-4.1

Form of Secured Promissory Note (incorporated by reference to Exhibit 4.1 filed with Form 8-K on May 1, 2023)

Exhibit 4.1 SECURED PROMISSORY NOTE Up to $9,286,770.80 April 26, 2023 FOR VALUE RECEIVED, Aridis Pharmaceuticals, Inc., a Delaware corporation (“Aridis”), Aridis Pharmaceuticals, C.V., a Netherlands partnership (“ARDS CV”), and Aridis Biopharmaceuticals, LLC, a Delaware limited liability company (“ARDS LLC” and, together with Aridis and ARDS CV, “Borrower”), jointly and severally promise to pay i

April 21, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) April 19, 2023 Aridis Pharmaceutic

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) April 19, 2023 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commiss

March 31, 2023 NT 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 12b-25 Commission File Number: 001-38630 NOTIFICATION OF LATE FILING

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 12b-25 Commission File Number: 001-38630 NOTIFICATION OF LATE FILING ☒ Form 10-K ☐ Form 20-F ☐ Form 11-K ☐ Form 10-Q ☐ Form 10-D ☐ Form N-SAR ☐ Form N-CSR For Period Ended: December 31, 2022 ☐ Transition Report on Form 10-K ☐ Transition Report on Form 10-Q ☐ Transition Report on Form 20-F ☐ Transition Report on Form N-SAR

March 31, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) March 27, 2023 Aridis Pharmaceutic

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) March 27, 2023 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commiss

March 29, 2023 8-K

Termination of a Material Definitive Agreement

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) March 20, 2023 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commiss

March 22, 2023 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) March 17, 2023 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commiss

March 20, 2023 EX-99.1

JOINT FILING AGREEMENT

Exhibit 99.1 JOINT FILING AGREEMENT The undersigned hereby agree that a single Schedule 13G (or any amendment thereto) relating to the Common Stock, par value $0.0001 per share, of Aridis Pharmaceuticals, Inc. shall be filed on behalf of each of the undersigned and that this Agreement shall be filed as an exhibit to such Schedule 13G. March 20, 2023 LIND GLOBAL FUND II LP By: Lind Global Partners

March 20, 2023 SC 13G

ARDS / Aridis Pharmaceuticals Inc / Lind Global Fund II LP Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Aridis Pharmaceuticals, Inc. (Name of Issuer) Common Stock, par value $0.0001 per share (Title of Class of Securities) 040334104 (CUSIP Number) March 16, 2023 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate t

March 16, 2023 424B5

6,000,000 Shares of Common Stock Aridis Pharmaceuticals, Inc.

Filed Pursuant to Rule 424(b)(5) Registration No. 333-267279 PROSPECTUS SUPPLEMENT (To Prospectus Dated September 12, 2022) 6,000,000 Shares of Common Stock Aridis Pharmaceuticals, Inc. We are offering an aggregate of 6,000,000 shares of our common stock, par value $0.0001 per share (the “Common Stock”), to two institutional investors. The purchase price of each share of Common Stock is $0.38. We

March 15, 2023 EX-10.1

Form of Securities Purchase Agreement (incorporated by reference to Exhibit 10.1 filed with Form 8-K on March 15, 2023)

Exhibit 10.1 SECURITIES PURCHASE AGREEMENT This Securities Purchase Agreement (this “Agreement”) is dated as of March 14, 2023, between Aridis Pharmaceuticals, Inc., a Delaware corporation (the “Company”), and each purchaser identified on the signature pages hereto (each, including its successors and assigns, a “Purchaser” and collectively the “Purchasers”). WHEREAS, subject to the terms and condi

March 15, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) March 14, 2023 Aridis Pharmaceutic

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) March 14, 2023 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of (Commission (I. R. S. E

March 15, 2023 EX-99.1

Aridis Pharmaceuticals Announces $2.28 Million Registered Direct Offering of Common Stock

Exhibit 99.1 Aridis Pharmaceuticals Announces $2.28 Million Registered Direct Offering of Common Stock Los Gatos, Calif., March 14, 2023 – Aridis Pharmaceuticals, Inc. (Nasdaq: ARDS), a biopharmaceutical company, today announced that it has entered into a definitive agreement for the issuance and sale of an aggregate of 6,000,000 shares of the Company’s common stock at a purchase price of $0.38 pe

March 13, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) March 10, 2023 Aridis Pharmaceutic

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) March 10, 2023 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commiss

February 14, 2023 SC 13G

ARDS / Aridis Pharmaceuticals Inc / ARMISTICE CAPITAL, LLC Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No.

February 10, 2023 SC 13G/A

ARDS / Aridis Pharmaceuticals Inc / ASTRAZENECA PLC - SC 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No.   1)* Aridis Pharmaceuticals, Inc. (Name of Issuer) Common Stock, par value $0.0001 per share (Title of Class of Securities) 040334104 (CUSIP Number) December 31, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to des

December 19, 2022 SC 13G

ARDS / Aridis Pharmaceuticals Inc / Cystic Fibrosis Foundation - SC 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G UNDER THE SECURITIES EXCHANGE ACT OF 1934 Aridis Pharmaceuticals, Inc. (Name of Issuer) Common Stock, $0.0001 par value per share (Title of Class of Securities) 040334104 (CUSIP Number) December 8, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant

December 15, 2022 424B3

7,207,208 Shares Common Stock Aridis Pharmaceuticals, Inc.

Filed Pursuant to Rule 424(b)(3) Registration No. 333-268701 PROSPECTUS 7,207,208 Shares Common Stock Aridis Pharmaceuticals, Inc. This prospectus relates to the resale by a certain selling stockholder of Aridis Pharmaceuticals, Inc. (?Aridis,? the ?Company,? ?we,? ?our,? or ?us?) identified in this prospectus of up to 7,207,208 shares (the ?Resale Shares?) of common stock, par value $0.0001 per s

December 12, 2022 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) December 7, 2022 Aridis Pharmaceut

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) December 7, 2022 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commi

December 12, 2022 CORRESP

Aridis Pharmaceuticals, Inc. 983 University Avenue, Bldg. B Los Gatos, CA 95032

Aridis Pharmaceuticals, Inc. 983 University Avenue, Bldg. B Los Gatos, CA 95032 December 12, 2022 VIA EDGAR United States Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.E. Washington, D.C. 20549 Attention: Jimmy McNamara Re: Aridis Pharmaceuticals, Inc. Registration Statement on Form S-1 File No. 333-268701 Filed December 7, 2022 Ladies and Gentlemen: Pursuant t

December 12, 2022 EX-99.1

Aridis Pharmaceuticals Receives Equity Investment from the Cystic Fibrosis Foundation

Exhibit 99.1 Aridis Pharmaceuticals Receives Equity Investment from the Cystic Fibrosis Foundation Los Gatos, Calif., December 12, 2022 – Aridis Pharmaceuticals, Inc. (NASDAQ: ARDS), a biopharmaceutical company today announced the Cystic Fibrosis Foundation invested $4.85 million in Aridis common stock on market terms under NASDAQ rules to support the ongoing development of AR-501, an inhalable br

December 12, 2022 EX-10.1

Form of Securities Purchase Agreement (filed with the Registrant’s Current Report on Form 8-K on December 12, 2022 and incorporated herein by reference).

Exhibit 10.1 SECURITIES PURCHASE AGREEMENT This Securities Purchase Agreement (this “Agreement”) is entered into as of December , 2022 (the “Effective Date”), by and between Aridis Pharmaceuticals, Inc., a Delaware corporation (the “Company”), and the purchaser identified on the signature pages hereto (the “Subscriber”). WHEREAS: The Company desires to issue and sell to the Subscriber, and the Sub

December 7, 2022 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables FORM S-1 (Form Type) ARIDIS PHARMACEUTICALS, INC.

December 7, 2022 S-1

As filed with the U.S. Securities and Exchange Commission on December 7, 2022.

As filed with the U.S. Securities and Exchange Commission on December 7, 2022. Registration Statement No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ARIDIS PHARMACEUTICALS, INC. (Exact name of registrant as specified in its charter) Delaware 2834 47-2641188 (State or other jurisdiction of incorporati

December 6, 2022 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables FORM S-8 (Form Type) ARIDIS PHARMACEUTICALS, INC.

December 6, 2022 S-8

As filed with the Securities and Exchange Commission on December 6, 2022

As filed with the Securities and Exchange Commission on December 6, 2022 Registration No.

November 22, 2022 EX-99.1

Aridis Pharmaceuticals Announces Third Quarter 2022 Financial Results and Business Update Top-line data from the Phase 3 clinical trial evaluating AR-301 for the treatment of VAP expected in December of this year

Exhibit 99.1 Aridis Pharmaceuticals Announces Third Quarter 2022 Financial Results and Business Update Top-line data from the Phase 3 clinical trial evaluating AR-301 for the treatment of VAP expected in December of this year LOS GATOS, Calif., November 21, 2022 /GlobeNewswire/ - Aridis Pharmaceuticals, Inc. (Nasdaq: ARDS), a biopharmaceutical company focused on the discovery and development of no

November 22, 2022 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) November 21, 2022 Aridis Pharmaceu

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) November 21, 2022 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Comm

November 21, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number: 001-38630 Aridis Pharmaceuticals, Inc. (Exact Nam

November 15, 2022 NT 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 12b-25 Commission File Number: 001-38630 NOTIFICATION OF LATE FILING

NT 10-Q 1 formnt10-q.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 12b-25 Commission File Number: 001-38630 NOTIFICATION OF LATE FILING ☐ Form 10-K ☐ Form 20-F ☐ Form 11-K ☒ Form 10-Q ☐ Form 10-D ☐ Form N-SAR ☐ Form N-CSR For Period Ended: September 30, 2022 ☐ Transition Report on Form 10-K ☐ Transition Report on Form 10-Q ☐ Transition Report on Form 20-F ☐ Trans

October 6, 2022 424B5

1,800,000 Shares of Common Stock Pre-Funded Warrants to Purchase up to 5,407,208 Shares of Common Stock Aridis Pharmaceuticals, Inc.

Filed Pursuant to Rule 424(b)(5) Registration No. 333-267279 Prospectus Supplement (To Prospectus Dated September 12, 2022) 1,800,000 Shares of Common Stock Pre-Funded Warrants to Purchase up to 5,407,208 Shares of Common Stock Aridis Pharmaceuticals, Inc. We are offering an aggregate of 1,800,000 shares of our common stock, par value $0.0001 per share (the ?Common Stock?) and pre-funded warrants

October 5, 2022 EX-4.1

Form of Pre-Funded Warrant

Exhibit 4.1 PREFUNDED COMMON STOCK PURCHASE WARRANT ARIDIS PHARMACEUTICALS, INC. Warrant Shares: 5,407,208 Issue Date: October 7, 2022 THIS PREFUNDED COMMON STOCK PURCHASE WARRANT (the ?Warrant?) certifies that, for value received, or its assigns (the ?Holder?) is entitled, upon the terms and subject to the limitations on exercise and the conditions hereinafter set forth, at any time on or after t

October 5, 2022 8-K

Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) September 29, 2022 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Com

October 5, 2022 EX-10.1

Form of Securities Purchase Agreement (filed with the Registrant’s Current Report on Form 8-K on October 5, 2022 and incorporated herein by reference).

Exhibit 10.1 SECURITIES PURCHASE AGREEMENT This Securities Purchase Agreement (this ?Agreement?) is dated as of October 5, 2022, between Aridis Pharmaceuticals, Inc., a Delaware corporation (the ?Company?), and the purchaser identified on the signature pages hereto (including its successors and assigns, the ?Purchaser?). WHEREAS, subject to the terms and conditions set forth in this Agreement and

October 5, 2022 EX-4.2

Form of Warrant (filed with the Registrant’s Current Report on Form 8-K on October 5, 2022 and incorporated herein by reference).

Exhibit 4.2 NEITHER THIS SECURITY NOR THE SECURITIES FOR WHICH THIS SECURITY IS EXERCISABLE HAVE BEEN REGISTERED WITH THE SECURITIES AND EXCHANGE COMMISSION OR THE SECURITIES COMMISSION OF ANY STATE IN RELIANCE UPON AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE ?SECURITIES ACT?), AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD EXCEPT PURSUANT TO AN EFFECTIVE REGISTR

October 5, 2022 8-K

Entry into a Material Definitive Agreement, Unregistered Sales of Equity Securities, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) October 5, 2022 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commis

September 26, 2022 424B5

Subject To Completion, Dated September 26, 2022

Filed Pursuant to Rule 424(b)(5) Registration No. 333-267279 The information contained in this preliminary prospectus supplement is not complete and may be changed. We may not sell these securities until the registration statement filed with the Securities and Exchange Commission is effective. This preliminary prospectus supplement is not an offer to sell these securities and it is not soliciting

September 8, 2022 CORRESP

Aridis Pharmaceuticals, Inc. 983 University Avenue, Bldg. B Los Gatos, CA 95032 September 8, 2022

Aridis Pharmaceuticals, Inc. 983 University Avenue, Bldg. B Los Gatos, CA 95032 September 8, 2022 VIA EDGAR United States Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549 Attention: Alan Campbell Re: Aridis Pharmaceuticals, Inc. Form S-3 File No. 333-267279 Ladies and Gentlemen: Pursuant to Rule 461 of the General Rules and Regulations under the Securities Act of 1933,

September 2, 2022 S-3

As filed with the U.S. Securities and Exchange Commission on September 2, 2022

As filed with the U.S. Securities and Exchange Commission on September 2, 2022 Registration No. 333-[] UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-3 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 47-2641188 (State or other jurisdiction of incorporation or organiz

September 2, 2022 EX-4.4

Form of Subordinated Indenture

Exhibit 4.4 ARIDIS PHARMACEUTICALS, INC., ISSUER AND [TRUSTEE], TRUSTEE INDENTURE DATED AS OF , 20 SUBORDINATED DEBT SECURITIES TABLE OF CONTENTS Page ARTICLE 1 DEFINITIONS 1 Section 1.01 Definitions of Terms 1 ARTICLE 2 ISSUE, DESCRIPTION, TERMS, EXECUTION, REGISTRATION AND EXCHANGE OF SECURITIES 4 Section 2.01 Designation and Terms of Securities 4 Section 2.02 Form of Securities and Trustee?s Ce

September 2, 2022 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables FORM S-3 (Form Type) ARIDIS PHARMACEUTICALS, INC.

September 2, 2022 EX-4.3

Form of Senior Indenture

Exhibit 4.3 ARIDIS PHARMACEUTICALS, INC., ISSUER AND [TRUSTEE], TRUSTEE INDENTURE DATED AS OF , 20 SENIOR DEBT SECURITIES TABLE OF CONTENTS Page ARTICLE I DEFINITIONS 1 Section 1.1 Definitions of Terms 1 ARTICLE II ISSUE, DESCRIPTION, TERMS, EXECUTION, REGISTRATION AND EXCHANGE OF SECURITIES 4 Section 2.1 Designation and Terms of Securities 4 Section 2.2 Form of Securities and Trustee?s Certificat

August 16, 2022 EX-99.1

Aridis Pharmaceuticals Announces Second Quarter 2022 Financial Results and Business Update Multiple clinical data readouts expected in second half of 2022

Exhibit 99.1 Aridis Pharmaceuticals Announces Second Quarter 2022 Financial Results and Business Update Multiple clinical data readouts expected in second half of 2022 LOS GATOS, Calif., August 16, 2022 /PRNewswire/ ? Aridis Pharmaceuticals, Inc. (Nasdaq: ARDS), a biopharmaceutical company focused on the discovery and development of novel anti-infective therapies for treating life-threatening infe

August 16, 2022 NT 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 12b-25 Commission File Number: 001-38630 NOTIFICATION OF LATE FILING

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 12b-25 Commission File Number: 001-38630 NOTIFICATION OF LATE FILING ? Form 10-K ? Form 20-F ? Form 11-K ? Form 10-Q ? Form 10-D ? Form N-SAR ? Form N-CSR For Period Ended: June 30, 2022 ? Transition Report on Form 10-K ? Transition Report on Form 10-Q ? Transition Report on Form 20-F ? Transition Report on Form N-SAR ? T

August 16, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) August 16, 2022 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commis

August 16, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number: 001-38630 Aridis Pharmaceuticals, Inc. (Exact Name of

August 15, 2022 8-K

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) August 15, 2022 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commis

June 27, 2022 EX-16.1

Letter from Mayer Hoffman McCann P.C. dated June 27, 2022

Exhibit 16.1 June 27, 2022 Securities and Exchange Commission 100 F Street N.E. Washington, D.C. 20549 Commissioners: We have read Item 4.01 of Aridis Pharmaceuticals, Inc.?s Form 8-K dated June 27, 2022, and we agree with the statements set forth in Item 4.01, insofar as they relate to our firm. We have no basis to agree or disagree with other statements made by the registrant contained in Item 4

June 27, 2022 8-K

Financial Statements and Exhibits, Changes in Registrant's Certifying Accountant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) June 21, 2022 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commissi

June 6, 2022 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) June 2, 2022 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commissio

May 16, 2022 EX-99.1

Aridis Pharmaceuticals Announces First Quarter 2022 Financial Results and Business Update Multiple clinical data readouts expected in second half of 2022

Exhibit 99.1 Aridis Pharmaceuticals Announces First Quarter 2022 Financial Results and Business Update Multiple clinical data readouts expected in second half of 2022 LOS GATOS, Calif., May 16, 2022 /PRNewswire/ - Aridis Pharmaceuticals, Inc. (Nasdaq: ARDS), a biopharmaceutical company focused on the discovery and development of novel anti-infective therapies to treat life-threatening infections,

May 16, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) May 16, 2022 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commissio

May 16, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

Table of Contents ? ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.

April 19, 2022 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.      )

? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.??????) Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)

April 19, 2022 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Defin

April 15, 2022 8-K

Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) April 13, 2022 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commiss

April 13, 2022 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

Table of Contents ? ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

April 13, 2022 EX-21.1

Subsidiaries of the Registrant

Exhibit 21.1 List of Subsidiaries of Aridis Pharmaceuticals, Inc.: Name Jurisdiction of Incorporation/Formation Aridis Biopharmaceuticals LLC ? Delaware Aridis Pharmaceuticals C.V. ? Netherlands ?

April 1, 2022 EX-99.1

Aridis Pharmaceuticals Announces 2021 Fourth Quarter and Year-End Financial Results and Business Update Awarded funding from the Gates Foundation to support development of inhaled formulation technology to deliver cost-effective monoclonal antibodies

Exhibit 99.1 Aridis Pharmaceuticals Announces 2021 Fourth Quarter and Year-End Financial Results and Business Update Awarded funding from the Gates Foundation to support development of inhaled formulation technology to deliver cost-effective monoclonal antibodies against influenza and COVID-19 LOS GATOS, Calif., March 31, 2022 /PRNewswire/ - Aridis Pharmaceuticals, Inc. (Nasdaq: ARDS), a biopharma

April 1, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) March 31, 2022 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commiss

March 30, 2022 NT 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 12b-25 Commission File Number: 001-38630 NOTIFICATION OF LATE FILING

NT 10-K 1 tm2210814d1nt10k.htm NT 10-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 12b-25 Commission File Number: 001-38630 NOTIFICATION OF LATE FILING x Form 10-K ¨ Form 20-F ¨ Form 11-K ¨ Form 10-Q ¨ Form 10-D ¨ Form N-SAR ¨ Form N-CSR For Period Ended: December 31, 2021 ¨ Transition Report on Form 10-K ¨ Transition Report on Form 10-Q ¨ Transition Report on Form

February 14, 2022 SC 13G/A

ARDS / Aridis Pharmaceuticals Inc / Francis Capital Management, LLC Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 1)* Aridis Pharmaceuticals, Inc. (Name of Issuer) Common Stock, $0.0001 par value (Title of Class of Securities) 040334104 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the r

January 19, 2022 EX-1.1

At-the-Market Sales Agreement dated January 19, 2022 by and between the Registrant and Virtu Americas LLC (filed with the Registrant’s Current Report on Form 8-K on January 19, 2022 and incorporated herein by reference).

EX-1.1 2 tm223211d1ex1-1.htm EXHIBIT 1.1 Exhibit 1.1 Execution Version ARIDIS PHARMACEUTICALS, INC. Shares of Common Stock (par value $0.0001 per share) At-the-Market Sales Agreement January 19, 2022 Virtu Americas LLC One Liberty Plaza 165 Broadway New York, NY 10006 Ladies and Gentlemen: Aridis Pharmaceuticals, Inc., a Delaware corporation (the “Company”), confirms its agreement (this “Agreement

January 19, 2022 8-K

Entry into a Material Definitive Agreement, Termination of a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) January 19, 2022 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commi

January 19, 2022 424B5

Up to $25,000,000 Common Stock

TABLE OF CONTENTS ?Filed Pursuant to Rule 424(b)(5) ?Registration No. 333-233601? PROSPECTUS SUPPLEMENT (To Prospectus Dated September 5, 2019) Up to $25,000,000 Common Stock We have entered into an At-the-Market Sales Agreement, or the Sales Agreement with Virtu Americas LLC, or Virtu, relating to shares of our common stock offered by this prospectus supplement and the accompanying prospectus. In

January 5, 2022 EX-99.1

1 Innovative Therapeutics For Respiratory Health Investor Presentation 1Q-2022 2 Forward Looking Statement These forward-looking statements relate to future events or future financial performance of the Company. All such forward-looking statements in

EX-99.1 2 tm221658d1ex99-1.htm EXHIBIT 99.1 Exhibit 99.1 1 Innovative Therapeutics For Respiratory Health Investor Presentation 1Q-2022 2 Forward Looking Statement These forward-looking statements relate to future events or future financial performance of the Company. All such forward-looking statements involve risks and uncertainties and are not guaranties of future performance. An investment in

January 5, 2022 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) January 5, 2022 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commis

December 21, 2021 EX-99.1

Aridis Pharmaceuticals Announces a Pan-Coronavirus Monoclonal Antibody Cocktail That Retains Effectiveness Against the Omicron variant, other COVID-19 Variants, SARS, MERS, and the Common Cold Human Coronaviruses AR-701 cocktail binds to the Omicron

Exhibit 99.1 Aridis Pharmaceuticals Announces a Pan-Coronavirus Monoclonal Antibody Cocktail That Retains Effectiveness Against the Omicron variant, other COVID-19 Variants, SARS, MERS, and the Common Cold Human Coronaviruses AR-701 cocktail binds to the Omicron variant with similar effectiveness as to the original Wuhan strain Viral neutralization and animal infection models support broad prophyl

December 21, 2021 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) December 21, 2021 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Comm

November 30, 2021 EX-4.1

Form of Secured Promissory Note (filed with the Registrant’s Current Report on Form 8-K on November 30 2021 and incorporated herein by reference).

Exhibit 4.1 SECURED PROMISSORY NOTE #1 Effective Date: November 23, 2021 U.S. $5,250,000.00 FOR VALUE RECEIVED, Aridis Pharmaceuticals, Inc., a Delaware corporation (?Borrower?), promises to pay to Streeterville Capital, LLC, a Utah limited liability company, or its successors or assigns (?Lender?), $5,250,000.00 and any interest, fees, charges, and late fees accrued hereunder on the date that is

November 30, 2021 EX-10.2

Security Agreement dated as of November 23, 2021 (filed with the Registrant’s Current Report on Form 8-K on November 30, 2021 and incorporated herein by reference).

Exhibit 10.2 Security Agreement This Security Agreement (this ?Agreement?), dated as of November 23, 2021, is executed by Aridis Pharmaceuticals, Inc., a Delaware corporation (?Debtor?), in favor of Streeterville Capital, LLC, a Utah limited liability company (?Secured Party?). A. Debtor has issued to Secured Party a certain Secured Promissory Note #1 of even date herewith, as may be amended from

November 30, 2021 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) November 23, 2021 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Comm

November 30, 2021 EX-10.1

Note Purchase Agreement dated as of November 23, 2021 (filed with the Registrant’s Current Report on Form 8-K on November 30, 2021 and incorporated herein by reference).

Exhibit 10.1 Note Purchase Agreement This Note Purchase Agreement (this ?Agreement?), dated as of November 23, 2021, is entered into by and between Aridis Pharmaceuticals, Inc., a Delaware corporation (?Company?), and Streeterville Capital, LLC, a Utah limited liability company, its successors and/or assigns (?Investor?). A. Company and Investor are executing and delivering this Agreement in relia

November 10, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

Table of Contents ? ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.

November 10, 2021 EX-99.1

Aridis Pharmaceuticals Announces Third Quarter 2021 Results Executed AstraZeneca in-licensing deal of Phase 3-ready antibody, suvratoxumab, in July 2021 Bolstered financial position with approx. $25 million in equity financing in August 2021

Exhibit 99.1 Aridis Pharmaceuticals Announces Third Quarter 2021 Results Executed AstraZeneca in-licensing deal of Phase 3-ready antibody, suvratoxumab, in July 2021 Bolstered financial position with approx. $25 million in equity financing in August 2021 LOS GATOS, Calif., November 10, 2021 /PRNewswire/ - Aridis Pharmaceuticals, Inc. (Nasdaq: ARDS), a biopharmaceutical company focused on the disco

November 10, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) November 10, 2021 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Comm

August 27, 2021 424B3

The date of this prospectus is August 26, 2021 TABLE OF CONTENTS

Filed Pursuant to Rule 424(b)(3) Registration No. 333-258809 PROSPECTUS Aridis Pharmaceuticals, Inc. 884,956 Shares of Common Stock This prospectus relates to the resale by the selling stockholder named herein, or its pledgees, donees, transferees or other successors in interest, from time to time, of 884,956 shares (the ?Shares?) of our common stock, par value $0.0001 per share (the ?Common Stock

August 24, 2021 CORRESP

Aridis Pharmaceuticals, Inc. 983 University Avenue, Bldg. B Los Gatos, CA 95032

Aridis Pharmaceuticals, Inc. 983 University Avenue, Bldg. B Los Gatos, CA 95032 August 24, 2021 VIA EDGAR United States Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549 Attention: Dillon Hagius Re: Aridis Pharmaceuticals, Inc. Registration Statement on Form S-3 Filed August 13, 2021 File No. 333-258809 Ladies and Gentlemen: Pursuant to Rule 461 of the General Rules and

August 23, 2021 S-3/A

As filed with the Securities and Exchange Commission on August 23, 2021

As filed with the Securities and Exchange Commission on August 23, 2021 Registration No.

August 13, 2021 S-3

Power of Attorney (included on signature page)

As filed with the Securities and Exchange Commission on August 13, 2021 Registration No.

August 12, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) August 12, 2021 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commis

August 12, 2021 EX-99.1

Aridis Pharmaceuticals, Inc. Consolidated Balance Sheets (in thousands)

Exhibit 99.1 Aridis Pharmaceuticals Announces Second Quarter 2021 Results ? In-licensed Phase 3-ready antibody, suvratoxumab, from AstraZeneca ? Raised approximately $25 million in equity financing ? Confirmed that SARS-CoV-2 antibody combination AR-712 is active against the Delta variant and all other strains on the CDCs Variants of Interest and Variants of Concern lists LOS GATOS, Calif., August

August 12, 2021 8-K/A

Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) August 12, 2021 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of in

August 12, 2021 EX-99.1

Aridis Pharmaceuticals, Inc. Consolidated Balance Sheets (in thousands)

Exhibit 99.1 Aridis Pharmaceuticals Announces Second Quarter 2021 Results ? In-licensed Phase 3-ready antibody, suvratoxumab, from AstraZeneca ? Raised approximately $25 million in equity financing ? Confirmed that SARS-CoV-2 antibody combination AR-712 is active against the Delta variant and all other strains on the CDCs Variants of Interest and Variants of Concern lists LOS GATOS, Calif., August

August 12, 2021 EX-10.3

Amendment No. 1 to the License Agreement between MedImmune Limited and Aridis Pharmaceuticals, Inc. dated August 9, 2021 (filed with the Registrant’s Quarterly Report on Form 10-Q on August 12, 2021 and incorporated herein by reference).

Exhibit 10.3 AMENDMENT NO. 1 TO LICENSE AGREEMENT This Amendment No. 1 to the License Agreement between MedImmune Limited and Aridis Pharmaceutitcals, Inc. (the ?Amendment?) is entered into as 09 August 2021 (the ?Amendment Effective Date?), by and between: (1) MedImmune Limited, a company incorporated in England under No. 2451177 whose registered office is at Milstein Building, Granta Park, Cambr

August 12, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q

Table of Contents ? ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.

August 4, 2021 EX-4.1

Form of Common Stock Purchase Warrant (filed with the Registrant’s Current Report on Form 8-K on August 4, 2021 and incorporated herein by reference).

Exhibit 4.1 COMMON STOCK PURCHASE WARRANT Aridis Pharmaceuticals, Inc. Warrant Shares: Issue Date: Initial Exercise Date: THIS COMMON STOCK PURCHASE WARRANT (the ?Warrant?) certifies that, for value received, or its assigns (the ?Holder?) is entitled, upon the terms and subject to the limitations on exercise and the conditions hereinafter set forth, at any time on or after the date set forth above

August 4, 2021 424B5

1,300,000 Shares of Common Stock Pre-Funded Warrants to Purchase up to 3,647,556 Shares of Common Stock Warrants to Purchase up to 2,473,778 Shares of Common Stock Up to 6,121,334 Shares of Common Stock underlying such Pre-Funded Warrants and Warrant

TABLE OF CONTENTS Filed Pursuant to Rule 424(b)(5) Registration No. 333-233601? PROSPECTUS SUPPLEMENT (To Prospectus Dated September 5, 2019) 1,300,000 Shares of Common Stock Pre-Funded Warrants to Purchase up to 3,647,556 Shares of Common Stock Warrants to Purchase up to 2,473,778 Shares of Common Stock Up to 6,121,334 Shares of Common Stock underlying such Pre-Funded Warrants and Warrants Aridis

August 4, 2021 EX-4.2

Form of Pre-Funded Common Stock Purchase Warrant

Exhibit 4.2 PRE-FUNDED COMMON STOCK PURCHASE WARRANT Aridis Pharmaceuticals, Inc. Warrant Shares: Issue Date: Initial Exercise Date: THIS PRE-FUNDED COMMON STOCK PURCHASE WARRANT (the ?Warrant?) certifies that, for value received, or its assigns (the ?Holder?) is entitled, upon the terms and subject to the limitations on exercise and the conditions hereinafter set forth, at any time on or after th

August 4, 2021 EX-99.1

Aridis Pharmaceuticals Announces $25 Million Registered Direct Offering Priced At a Premium to Market

Exhibit 99.1 Aridis Pharmaceuticals Announces $25 Million Registered Direct Offering Priced At a Premium to Market LOS GATOS, Calif., August 2, 2021 /PRNewswire/ - Aridis Pharmaceuticals, Inc. (Nasdaq: ARDS), a biopharmaceutical company focused on the discovery and development of novel anti-infective therapies to treat life-threatening infections, today announced that it has entered into a definit

August 4, 2021 EX-10.1

Form of Securities Purchase Agreement (filed with the Registrant’s Current Report on Form 8-K on August 4, 2021 and incorporated herein by reference).

Exhibit 10.1 SECURITIES PURCHASE AGREEMENT This Securities Purchase Agreement (this ?Agreement?) is dated as of August 2, 2021, between Aridis Pharmaceuticals, Inc., a Delaware corporation (the ?Company?), and each purchaser identified on the signature pages hereto (each, including its successors and assigns, a ?Purchaser? and collectively the ?Purchasers?). WHEREAS, subject to the terms and condi

August 4, 2021 8-K

Entry into a Material Definitive Agreement, Unregistered Sales of Equity Securities, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) August 2, 2021 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of (Commission File Number

July 27, 2021 EX-99

JOINT FILING AGREEMENT

Exhibit 99 JOINT FILING AGREEMENT In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, each of the persons named below agrees to the joint filing of a Statement on Schedule 13G (including amendments thereto) with respect to the common stock, par value $0.

July 27, 2021 SC 13G

ARDS / Aridis Pharmaceuticals Inc / ASTRAZENECA PLC - SC 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No.     )* Aridis Pharmaceuticals, Inc. (Name of Issuer) Common Stock, par value $0.0001 per share (Title of Class of Securities) 040334104 (CUSIP Number) July 20, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designat

July 26, 2021 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) July 26, 2021 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commissi

July 26, 2021 EX-99.1

Aridis Pharmaceuticals’ COVID mAb Ranks Among the Top 5 Most Potent COVID-19 mAbs Evaluated by the Coronavirus Immunotherapeutics Consortium (CoVIC) CoVIC’s animal efficacy data shows that Aridis’ AR-711 mAb is among the top 5 most potent out of more

EX-99.1 2 tm2123222d1ex99-1.htm EXHIBIT 99.1 Exhibit 99.1 Aridis Pharmaceuticals’ COVID mAb Ranks Among the Top 5 Most Potent COVID-19 mAbs Evaluated by the Coronavirus Immunotherapeutics Consortium (CoVIC) CoVIC’s animal efficacy data shows that Aridis’ AR-711 mAb is among the top 5 most potent out of more than 350 COVID mAbs that have entered the CoVIC evaluation program to date The dual mAbs co

July 19, 2021 EX-10.1

License Agreement between MedImmune Limited and Aridis Pharmaceuticals, Inc. dated as of July 12, 2021(filed with the Registrant’s Current Report on Form 8-K on July 19, 2021 and incorporated herein by reference).

EX-10.1 2 tm2122496d1ex10-1.htm EXHIBIT 10.1 Exhibit 10.1 Execution Version *Certain information in this document has been omitted from this exhibit because it is both (i) not material and (ii) would be competitively harmful if publicly disclosed LICENSE AGREEMENT between MEDIMMUNE LIMITED and ARIDIS PHARMACEUTICALS, INC Dated as of 12 July 2021 TABLE OF CONTENTS ARTICLE 1 DEFINITIONS 1 ARTICLE 2

July 19, 2021 EX-99.1

Aridis Pharmaceuticals Announces Exclusive License of Suvratoxumab, a Phase 3-Ready Monoclonal Antibody, from AstraZeneca

EX-99.1 3 tm2122496d1ex99-1.htm EXHIBIT 99.1 Exhibit 99.1 Aridis Pharmaceuticals Announces Exclusive License of Suvratoxumab, a Phase 3-Ready Monoclonal Antibody, from AstraZeneca Los Gatos, Calif., July 19, 2021 /PRNewswire/ - Aridis Pharmaceuticals, Inc. (Nasdaq: ARDS) today announced that it has entered into an exclusive, worldwide licensing agreement with AstraZeneca (LSE/STO/Nasdaq: AZN) to i

July 19, 2021 8-K

Entry into a Material Definitive Agreement, Unregistered Sales of Equity Securities, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) July 13, 2021 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commissi

July 13, 2021 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) July 12, 2021 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commissi

July 13, 2021 EX-99.1

Aridis Pharmaceuticals COVID mAb AR-712 Neutralizes SARS-COV2 Delta Variant Texas Biomedical Research Institute and Aridis’ data confirmed AR-712 binds to and neutralizes the Delta variant of SARS-COV2 virus Binding analysis projects the ability of A

EX-99.1 2 tm2122085d1ex99-1.htm EXHIBIT 99.1 Exhibit 99.1 Aridis Pharmaceuticals COVID mAb AR-712 Neutralizes SARS-COV2 Delta Variant Texas Biomedical Research Institute and Aridis’ data confirmed AR-712 binds to and neutralizes the Delta variant of SARS-COV2 virus Binding analysis projects the ability of AR-712 to bind to all variants on the Center for Disease Control’s Variants of Interest and V

June 3, 2021 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) June 3, 2021 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commissio

June 2, 2021 8-K

Termination of a Material Definitive Agreement

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) May 26, 2021 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commissio

May 24, 2021 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) May 18, 2021 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commissio

May 11, 2021 EX-99.1

Aridis Pharmaceuticals, Inc. Consolidated Balance Sheets (in thousands)

Exhibit 99.1 Aridis Pharmaceuticals Announces First Quarter 2021 Results LOS GATOS, Calif., May 11, 2021 /PRNewswire/ - Aridis Pharmaceuticals, Inc. (Nasdaq: ARDS), a biopharmaceutical company focused on the discovery and development of novel anti-infective therapies to treat life-threatening infections, today reported financial and corporate results for the first quarter ended March 31, 2021. Fir

May 11, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) May 11, 2021 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commissio

May 11, 2021 10-Q

Quarterly Report - FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2021 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number: 001-38630 Aridis Pharmaceuticals, Inc. (Exact Name of

April 30, 2021 10-Q/A

Quarterly Report - FORM 10-Q/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q/A (Amendment No. 1) (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2020 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number: 001-38630 Aridis Pharmaceuticals,

April 30, 2021 10-K/A

Annual Report - FORM 10-K/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K/A (Amendment No. 1) (Mark one) x Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended December 31, 2019 or ? Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the transition period from to Commission file number 001-3

April 16, 2021 DEF 14A

The Company’s Definitive Proxy Statement filed with the SEC on April 16, 2021;

? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ???????) Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(

April 1, 2021 SC 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No.)*

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No.)* Aridis Pharmaceuticals, Inc. (Name of Issuer) Common Stock, $0.0001 par value per share (Title of Class of Securities) 040334104 (CUSIP Number) March 17, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate th

March 31, 2021 EX-99.1

Aridis Pharmaceuticals, Inc. Consolidated Balance Sheets (in thousands) December 31, December 31, 2020 2019 Cash and cash equivalents $ 8,232 $ 20,897 Other current and noncurrent assets 6,885 7,070 Total Assets $ 15,117 $ 27,967 Total Liabilities $

Exhibit 99.1 Aridis Pharmaceuticals Announces 2020 Fourth Quarter and Year-End Financial Results and Business Update LOS GATOS, Calif., March 30, 2021 /PRNewswire/ - Aridis Pharmaceuticals, Inc. (Nasdaq: ARDS), a biopharmaceutical company focused on the discovery and development of novel anti-infective therapies to treat life-threatening infections, today reported financial and corporate results f

March 31, 2021 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) March 30, 2021 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commiss

March 30, 2021 EX-21.1

Subsidiaries of the Registrant

? Exhibit 21.1? List of Subsidiaries of Aridis Pharmaceuticals, Inc.: Name ? ? Jurisdiction of Incorporation/Formation ? Aridis Biopharmaceuticals LLC ? ? Delaware ? Aridis Pharmaceuticals C.V. ? ? Netherlands ?

March 30, 2021 10-K

Annual Report - 10-K

TABLE OF CONTENTS ? ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

March 17, 2021 424B5

1,037,405 Shares of Common Stock

Use these links to rapidly review the document TABLE OF CONTENTS TABLE OF CONTENTS Table of Contents Filed Pursuant to Rule 424(b)(5) Registration No.

March 16, 2021 8-K/A

Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A Amendment No. 1 CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) March 15, 2021 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incor

March 15, 2021 8-K

Entry into a Material Definitive Agreement, Unregistered Sales of Equity Securities, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) March 15, 2021 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commiss

March 15, 2021 EX-10.1

Form of Securities Purchase Agreement dated March 15, 2021 by and between Aridis Pharmaceuticals, Inc. and the Purchasers (filed with the Registrant’s Current Report on Form 8-K on March 15, 2021 and incorporated herein by reference).

EX-10.1 2 a21-97861ex10d1.htm EX-10.1 Exhibit 10.1 SECURITIES PURCHASE AGREEMENT This Securities Purchase Agreement (this “Agreement”) is dated as of March 15, 2021, between Aridis Pharmaceuticals, Inc., a Delaware corporation with headquarters located at 983 University Avenue, Bldg. B, Los Gatos, CA 95032 (the “Company”), and each purchaser identified on the signature pages hereto (each, includin

March 8, 2021 EX-99.1

Aridis Enters into APEX™ Licensing and Product Discovery Agreement for Zoonotic Viruses with Kermode

EX-99.1 2 tm218998d1ex99-1.htm EXHIBIT 99.1 Exhibit 99.1 Aridis Enters into APEX™ Licensing and Product Discovery Agreement for Zoonotic Viruses with Kermode LOS GATOS, Calif., March 8, 2021 /PRNewswire/ - Aridis Pharmaceuticals, Inc. (Nasdaq: ARDS) today announced that it has entered into an out-licensing and product discovery agreement with Kermode Biotechnologies, Inc. Kermode works on vaccines

March 8, 2021 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) March 8, 2021 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commissi

February 23, 2021 EX-99.1

Aridis Pharmaceuticals Provides Multiple Program Updates Including the Addition of a Second Inhaled Antibody to Neutralize Newly Emerging COVID-19 Mutated Variants

EX-99.1 2 a21-76751ex99d1.htm EX-99.1 Exhibit 99.1 Aridis Pharmaceuticals Provides Multiple Program Updates Including the Addition of a Second Inhaled Antibody to Neutralize Newly Emerging COVID-19 Mutated Variants National Institute of Allergy and Infectious Disease (NIAID) and the Coronavirus Immunotherapy Consortium (CoVIC) are providing preclinical services support to accelerate development Ph

February 23, 2021 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) February 23, 2021 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Comm

February 12, 2021 CORRESP

ARIDIS PHARMACEUTICALS, INC. 983 University Avenue, Bldg. B Los Gatos, California 95032

ARIDIS PHARMACEUTICALS, INC. 983 University Avenue, Bldg. B Los Gatos, California 95032 February 12, 2021 VIA EDGAR United States Securities and Exchange Commission 100 F. Street, NE Washington, DC 20549 Attention: Rolf Sundwall Kevin Vaughn Re: Aridis Pharmaceuticals, Inc. Form 10-K for the Fiscal Year Ended December 31, 2019 Filed April 8, 2020 File No. 001-38630 Dear Ladies and Gentlemen: This

December 4, 2020 CORRESP

ARIDIS PHARMACEUTICALS, INC. 983 University Avenue, Bldg. B Los Gatos, California 95032

ARIDIS PHARMACEUTICALS, INC. 983 University Avenue, Bldg. B Los Gatos, California 95032 December 4, 2020 VIA EDGAR United States Securities and Exchange Commission 100 F. Street, NE Washington, DC 20549 Attention: Rolf Sundwall Kevin Vaughn Re: Aridis Pharmaceuticals, Inc. Form 10-K for the Fiscal Year Ended December 31, 2019 Filed April 8, 2020 File No. 001-38630 Dear Ladies and Gentlemen: This l

November 23, 2020 10-Q

our Quarterly Report on Form 10-Q for the quarter ended September 30, 2020 filed on November 23, 2020

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2020 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number: 001-38630 Aridis Pharmaceuticals, Inc. (Exact Nam

November 23, 2020 EX-10.5

Exclusive License Agreement dated September 10, 2020 by and between Aridis Pharmaceuticals, Inc. and UAB Research Foundation (filed with the Registrant’s Quarterly Report on Form 10-Q on November 23, 2020 and incorporated herein by reference).

Exhibit 10.5 [*] Certain information in this document has been omitted from this exhibit because it is both (i) not material and (ii) would be competitively harmful if publicly disclosed. EXCLUSIVE LICENSE AGREEMENT This exclusive license agreement (this “Agreement”) is made and is effective as of September 10, 2020 (the “Effective Date”) between The UAB Research Foundation (“UABRF”), a non-profit

November 20, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) November 20, 2020 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Comm

November 20, 2020 EX-99.1

Aridis Pharmaceuticals Announces Third Quarter 2020 Results

Exhibit 99.1 Aridis Pharmaceuticals Announces Third Quarter 2020 Results SAN JOSE, Calif., November 20, 2020 /PRNewswire/ — Aridis Pharmaceuticals, Inc. (Nasdaq: ARDS), a biopharmaceutical company focused on the discovery and development of novel anti-infective therapies to treat life-threatening infections, today reported financial and corporate results for the third quarter ended September 30, 2

November 16, 2020 NT 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 12b-25 Commission File Number: 001-38630 NOTIFICATION OF LATE FILING

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 12b-25 Commission File Number: 001-38630 NOTIFICATION OF LATE FILING o Form 10-K o Form 20-F o Form 11-K x Form 10-Q o Form 10-D o Form N-SAR o Form N-CSR For Period Ended: September 30, 2020 o Transition Report on Form 10-K o Transition Report on Form 10-Q o Transition Report on Form 20-F o Transition Report on Form N-SA

October 20, 2020 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) October 14, 2020 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commi

October 20, 2020 EX-10.1

Office Lease dated October 14, 2020 by and between Aridis Pharmaceuticals, Inc. and Boccardo Corporation (filed with the Registrant’s Current Report on Form 8-K on October 20, 2020 and incorporated herein by reference).

Exhibit 10.1 NNN OFFICE LEASE BOCCARDO CORPORATION, a California corporation as “Landlord” and ARIDIS PHARMACEUTICALS, INC. as “Tenant” ARIDIS PHARMACEUTICALS, INC. NNN OFFICE LEASE SUMMARY OF BASIC LEASE TERMS SECTION (LEASE REFERENCE) TERMS A. (Introduction) Lease Reference Date: October 6, 2020 B. (Introduction) Landlord: BOCCARDO CORPORATION, a California corporation C. (Introduction) Tenant:

October 19, 2020 8-K

Financial Statements and Exhibits, Other Events - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) October 19, 2020 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commi

October 19, 2020 EX-99.1

Aridis Pharmaceuticals Reports Positive Preclinical Efficacy Data of a Highly Effective Inhaled Treatment Supporting a Proposed Self-Administered Therapy for COVID-19 Patients

Exhibit 99.1 Aridis Pharmaceuticals Reports Positive Preclinical Efficacy Data of a Highly Effective Inhaled Treatment Supporting a Proposed Self-Administered Therapy for COVID-19 Patients SAN JOSE, Calif., October 19, 2020 /PRNewswire/ — Aridis Pharmaceuticals, Inc. (Nasdaq: ARDS), a biopharmaceutical company focused on the discovery and development of novel anti-infective therapies to treat life

October 15, 2020 424B5

1,134,470 Shares of Common Stock

Use these links to rapidly review the document TABLE OF CONTENTS TABLE OF CONTENTS Table of Contents Filed Pursuant to Rule 424(b)(5) Registration No.

October 14, 2020 8-K

Entry into a Material Definitive Agreement, Unregistered Sales of Equity Securities, Financial Statements and Exhibits - FORM 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) October 13, 2020 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commi

October 14, 2020 EX-99.1

Aridis Pharmaceuticals Announces $8.5 Million Registered Direct Offering Company Enters Into Securities Purchase Agreement with Institutional Investors

Exhibit 99.1 Aridis Pharmaceuticals Announces $8.5 Million Registered Direct Offering Company Enters Into Securities Purchase Agreement with Institutional Investors SAN JOSE, Calif., October 14, 2020 /PRNewswire/ - Aridis Pharmaceuticals, Inc. (Nasdaq: ARDS) (the “Company”), a biopharmaceutical company focused on the discovery and development of novel anti-infective therapies to treat life-threate

October 14, 2020 EX-10.3

Form of Series B Warrant (filed with the Registrant’s Current Report on Form 8-K on October 14, 2020 and incorporated herein by reference).

Exhibit 10.3 THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR APPLICABLE STATE SECURITIES LAWS. THE SECURITIES MAY NOT BE OFFERED FOR SALE, SOLD, TRANSFERRED OR ASSIGNED (I) IN THE ABSENCE OF (A) AN EFFECTIVE REGISTRATION STATEMENT FOR THE SECURITIES UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR (B) AN OPINION OF COUNSEL TO THE HOLDER (

October 14, 2020 EX-10.2

Form of Series A Warrant (filed with the Registrant’s Current Report on Form 8-K on October 14, 2020 and incorporated herein by reference).

Exhibit 10.2 THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR APPLICABLE STATE SECURITIES LAWS. THE SECURITIES MAY NOT BE OFFERED FOR SALE, SOLD, TRANSFERRED OR ASSIGNED (I) IN THE ABSENCE OF (A) AN EFFECTIVE REGISTRATION STATEMENT FOR THE SECURITIES UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR (B) AN OPINION OF COUNSEL TO THE HOLDER (

October 14, 2020 EX-10.1

Form of Securities Purchase Agreement, dated October 13, 2020, by and between Aridis Pharmaceuticals, Inc. and the Purchasers (filed with the Registrant’s Current Report on Form 8-K on October 14, 2020 and incorporated herein by reference).

EX-10.1 3 tm2033155d1ex10-1.htm EXHIBIT 10.1 Exhibit 10.1 SECURITIES PURCHASE AGREEMENT This SECURITIES PURCHASE AGREEMENT (this “Agreement”), dated as of October 13, 2020, is by and among Aridis Pharmaceuticals, Inc., a Delaware corporation with headquarters located at 5941 Optical Ct., San Jose, CA 95138 (the ”Company”), and the buyers identified on the signature pages hereto (the “Buyers”). REC

September 1, 2020 CORRESP

ARIDIS PHARMACEUTICALS, INC. 5941 Optical Ct. San Jose, CA 95138

ARIDIS PHARMACEUTICALS, INC. 5941 Optical Ct. San Jose, CA 95138 September 1, 2020 VIA EDGAR United States Securities and Exchange Commission 100 F. Street, NE Washington, DC 20549 Attention: Rolf Sundwall Kevin Vaughn Re: Aridis Pharmaceuticals, Inc. Form 10-K for the Fiscal Year Ended December 31, 2019 Filed April 8, 2020 File No. 001-38630 Dear Ladies and Gentlemen: This letter sets forth respo

August 18, 2020 CORRESP

ARIDIS PHARMACEUTICALS, INC. 5941 Optical Ct. San Jose, CA 95138

ARIDIS PHARMACEUTICALS, INC. 5941 Optical Ct. San Jose, CA 95138 August 18, 2020 VIA EDGAR United States Securities and Exchange Commission 100 F. Street, NE Washington, DC 20549 Attention: Rolf Sundwall Kevin Vaughn Re: Aridis Pharmaceuticals, Inc. Form 10-K for the Fiscal Year Ended December 31, 2019 Filed April 8, 2020 File No. 001-38630 Dear Ladies and Gentlemen: This letter sets forth respons

August 11, 2020 10-Q

Quarterly Report - FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2020 OR ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number: 001-38630 Aridis Pharmaceuticals, Inc.

August 11, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) August 11, 2020 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commis

August 11, 2020 EX-99.1

Aridis Pharmaceuticals Announces Second Quarter 2020 Results

Exhibit 99.1 Aridis Pharmaceuticals Announces Second Quarter 2020 Results SAN JOSE, Calif., August 11, 2020 /PRNewswire/ — Aridis Pharmaceuticals, Inc. (Nasdaq: ARDS), a biopharmaceutical company focused on the discovery and development of novel anti-infective therapies to treat life-threatening infections, today reported financial and corporate results for the second quarter ended June 30, 2020.

July 28, 2020 S-8

- FORM S-8

As filed with the Securities and Exchange Commission on July 27, 2020 Registration No.

June 26, 2020 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) June 25, 2020 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commissi

June 26, 2020 EX-99.1

Novel Anti-infectives Focusing on Respiratory Health APEXTM mAb Discovery Platform Cantor Fitzgerald Fireside Chat 25June2020 Aridis Pharmaceuticals 1

EX-99.1 2 a20-235581ex99d1.htm EX-99.1 Exhibit 99.1 Novel Anti-infectives Focusing on Respiratory Health APEXTM mAb Discovery Platform Cantor Fitzgerald Fireside Chat 25June2020 Aridis Pharmaceuticals 1 Forward-Looking Statements These forward-looking statements relate to future events or future financial performance of the Company. All such forward-looking statements involve risks and uncertainti

June 22, 2020 EX-99.1

Aridis Reports AR-501 Clinical Data: Positive Safety Data in Healthy Subjects of a Phase 1/2a Clinical Trial

Exhibit 99.1 Aridis Reports AR-501 Clinical Data: Positive Safety Data in Healthy Subjects of a Phase 1/2a Clinical Trial · Phase 1 portion of the Phase 1/2a trial, 48 healthy volunteers were treated with either single or multiple weekly dose regimens · No serious adverse events and well tolerated · AR-501 Phase 2a received recommendations to proceed from the Data Safety Monitoring Board (DSMB) fr

June 22, 2020 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) June 22, 2020 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commissi

June 15, 2020 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) June 15, 2020 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commissi

June 15, 2020 EX-99.1

Aridis Pharmaceuticals Appoints Dr. Hasan Jafri as Chief Medical Officer

Exhibit 99.1 Aridis Pharmaceuticals Appoints Dr. Hasan Jafri as Chief Medical Officer SAN JOSE, Calif., June 15, 2020 /PRNewswire/ - Aridis Pharmaceuticals, Inc. (Nasdaq: ARDS), a biopharmaceutical company focused on the discovery and development of novel anti-infective therapies to treat life-threatening bacterial infections, announced today that it has appointed Dr. Hasan Jafri as Chief Medical

June 4, 2020 8-K

Submission of Matters to a Vote of Security Holders

8-K 1 a20-2185218k.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) June 4, 2020 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction o

May 14, 2020 424B5

Up to $22,000,000 Common Stock

Filed Pursuant to Rule 424(b)(5) Registration No. 333-233601 PROSPECTUS SUPPLEMENT (To Prospectus Dated September 5, 2019) Up to $22,000,000 Common Stock We previously entered into a certain Controlled Equity OfferingSM sales agreement, or the sales agreement, with Cantor Fitzgerald & Co., or Cantor Fitzgerald, acting as sales agent, having an aggregate offering price of up to $25,000,000. As of M

May 12, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) May 12, 2020 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commissio

May 12, 2020 EX-99.1

Aridis Pharmaceuticals Announces First Quarter 2020 Results

Exhibit 99.1 Aridis Pharmaceuticals Announces First Quarter 2020 Results SAN JOSE, Calif., May 12, 2020 /PRNewswire/ - Aridis Pharmaceuticals, Inc. (Nasdaq: ARDS), a biopharmaceutical company focused on the discovery and development of novel anti-infective therapies to treat life-threatening bacterial infections, today reported financial and corporate results for the first quarter ended March 31,

May 12, 2020 10-Q

Quarterly Report - FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2020 OR ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number: 001-38630 Aridis Pharmaceuticals, Inc.

May 5, 2020 EX-99.1

Silicon Valley Bank U.S. Small Business Administration Paycheck Protection Program

Exhibit 99.1 Silicon Valley Bank U.S. Small Business Administration Paycheck Protection Program Note SBA Loan No. 56951872-07 SBA Loan Name Borrower Aridis Pharmaceuticals, Inc. Legal Name DBA Date 5/1/2020 Loan Amount $714510 Interest Rate 1.0% per annum Borrower Aridis Pharmaceuticals, Inc. Operating Company Not applicable Lender Silicon Valley Bank 1. PROMISE TO PAY. In return for the Loan, Bor

May 5, 2020 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) May 1, 2020 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commission

April 17, 2020 DEF 14A

Aridis Pharmaceuticals, Inc. 2014 Amended and Restated 2014 Equity Incentive Plan (filed with the Registrant’s Proxy Statement as Appendix A on April 17,2020 and incorporated herein by reference).

QuickLinks - Click here to rapidly navigate through this document UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

April 8, 2020 S-8

ARDS / Aridis Pharmaceuticals, Inc. S-8 - - S-8

As filed with the Securities and Exchange Commission on April 8, 2020 Registration No.

April 8, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) April 8, 2020 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commissi

April 8, 2020 10-K

ARDS / Aridis Pharmaceuticals, Inc. 10-K - Annual Report - 10-K

Use these links to rapidly review the document TABLE OF CONTENTS PART IV CONSOLIDATED FINANCIAL STATEMENTS ARIDIS PHARMACEUTICALS, INC.

April 8, 2020 EX-21.1

Subsidiaries of the Registrant

QuickLinks - Click here to rapidly navigate through this document Exhibit 21.1 List of Subsidiaries of Aridis Pharmaceuticals, Inc.: Name Jurisdiction of Incorporation/Formation Aridis Biopharmaceuticals LLC Delaware Aridis Pharmaceuticals C.V. Netherlands Shenzhen Arimab BioPharmaceuticals Co., Ltd. People's Republic of China QuickLinks Exhibit 21.1

April 8, 2020 EX-4.1

Description of the Registrant’s Securities registered pursuant to Section 12 of the Securities Exchange Act of 1934 (filed with the Registrant’s Annual Report on Form 10-K on April 8, 2020 and incorporated herein by reference)

Exhibit 4.1 DESCRIPTION OF THE REGISTRANT’S SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 As of December 31, 2019, Aridis Pharmaceuticals, Inc. had one class of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”): (i) common stock, $0.0001 par value per share (“Common Stock”). Unless the context otherw

April 8, 2020 EX-99.1

Aridis Pharmaceuticals Announces 2019 Fourth Quarter and Year-End Financial Results and Business Update

EX-99.1 2 a20-152871ex99d1.htm EX-99.1 Exhibit 99.1 Aridis Pharmaceuticals Announces 2019 Fourth Quarter and Year-End Financial Results and Business Update SAN JOSE, Calif., April 8, 2020 /PRNewswire/ — Aridis Pharmaceuticals, Inc. (Nasdaq: ARDS), a biopharmaceutical company focused on the discovery and development of novel anti-infective therapies to treat life-threatening bacterial infections, t

March 30, 2020 NT 10-K

ARDS / Aridis Pharmaceuticals, Inc. NT 10-K - - NT 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 12b-25 Commission File Number: 001-38630 NOTIFICATION OF LATE FILING (Check one): x Form 10-K o Form 20-F o Form 11-K o Form 10-Q o Form 10-D o Form N-CEN o Form N-CSR For Period Ended: December 31, 2019 o Transition Report on Form 10-K o Transition Report on Form 20-F o Transition Report on Form 11-K o Transition Report

March 6, 2020 EX-99.1

Aridis Pharmaceuticals to Postpone Investor Day Due to Coronavirus Concerns

Exhibit 99.1 Aridis Pharmaceuticals to Postpone Investor Day Due to Coronavirus Concerns SAN JOSE, Calif., March 6, 2020 /PRNewswire/ — Aridis Pharmaceuticals, Inc. (Nasdaq: ARDS), a biopharmaceutical company focused on the discovery and development of novel anti-infective therapies to treat life-threatening bacterial infections, announced today the postponement of its Investor Day scheduled for T

March 6, 2020 8-K

Financial Statements and Exhibits, Other Events

8-K 1 a20-1200418k.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) March 6, 2020 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction

March 5, 2020 EX-99.1

Aridis Pharmaceuticals to Present at the 32nd Annual ROTH Conference

Exhibit 99.1 Aridis Pharmaceuticals to Present at the 32nd Annual ROTH Conference SAN JOSE, Calif., March 5, 2020 /PRNewswire/ - Aridis Pharmaceuticals, Inc. (Nasdaq: ARDS), a biopharmaceutical company focused on the discovery and development of novel anti-infective therapies to treat life-threatening bacterial infections, announced today that Vu Truong, Ph.D., Chief Executive Officer, will presen

March 5, 2020 8-K

Financial Statements and Exhibits, Other Events

8-K 1 tm2011678-28k.htm FORM 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) March 5, 2020 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdi

March 4, 2020 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) March 4, 2020 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commissi

March 4, 2020 EX-99.1

Aridis Pharmaceuticals Provides Update on Investor Day Featuring Key Opinion Leader Panels on Cystic Fibrosis and Pneumonia

Exhibit 99.1 Aridis Pharmaceuticals Provides Update on Investor Day Featuring Key Opinion Leader Panels on Cystic Fibrosis and Pneumonia SAN JOSE, Calif., March 4, 2020 /PRNewswire/ - Aridis Pharmaceuticals, Inc. (Nasdaq: ARDS), a biopharmaceutical company focused on the discovery and development of novel anti-infective therapies to treat life-threatening bacterial infections, is pleased to provid

January 28, 2020 8-K

Financial Statements and Exhibits, Other Events

8-K 1 tm206081d18k.htm FORM 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) January 28, 2020 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other juris

January 28, 2020 EX-99.1

Aridis Pharmaceuticals Presents APEXTM Antibody Discovery and Production Platform Technology at the 19th Annual CHI PepTalk Conference

EX-99.1 2 tm206081d1ex99-1.htm EXHIBIT 99.1 Exhibit 99.1 Aridis Pharmaceuticals Presents APEXTM Antibody Discovery and Production Platform Technology at the 19th Annual CHI PepTalk Conference SAN JOSE, Calif., Jan. 28th, 2020 /PRNewswire/ - Aridis Pharmaceuticals, Inc. (Nasdaq: ARDS) (the “Company”) presented a comprehensive profile of its APEXTM platform technology at the antibody and cell engine

January 2, 2020 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) December 31, 2019 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Comm

January 2, 2020 EX-99.1

Aridis Pharmaceuticals Appoints Michael A. Nazak as Chief Financial Officer

Exhibit 99.1 Aridis Pharmaceuticals Appoints Michael A. Nazak as Chief Financial Officer SAN JOSE, Calif., January 2, 2020 /PRNewswire/ - Aridis Pharmaceuticals, Inc. (Nasdaq: ARDS), a biopharmaceutical company focused on the discovery and development of targeted immunotherapies using fully human monoclonal antibodies (mAbs) to treat life-threatening bacterial infections, today announced the appoi

December 30, 2019 8-K

Regulation FD Disclosure

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) December 30, 2019 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Comm

November 13, 2019 10-Q

ARDS / Aridis Pharmaceuticals, Inc. 10-Q - Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2019 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number: 001-38630 Aridis Pharmaceuticals, Inc.

November 13, 2019 EX-99.1

Aridis Pharmaceuticals Announces Third Quarter 2019 Results

Exhibit 99.1 Aridis Pharmaceuticals Announces Third Quarter 2019 Results SAN JOSE, Calif., November 13, 2019 /PRNewswire/ — Aridis Pharmaceuticals, Inc. (Nasdaq: ARDS), a biopharmaceutical company focused on the discovery and development of targeted immunotherapies using fully human monoclonal antibodies (mAbs) to treat life-threatening bacterial infections, today reported financial and corporate

November 13, 2019 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) November 13, 2019 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Comm

October 11, 2019 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) October 9, 2019 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Commis

October 11, 2019 EX-99.1

Aridis Pharmaceuticals Appoints Infectious Disease Expert Paul Mendelman, MD as Interim Chief Medical Officer

Exhibit 99.1 Aridis Pharmaceuticals Appoints Infectious Disease Expert Paul Mendelman, MD as Interim Chief Medical Officer SAN JOSE, Calif., October 11, 2019 /PRNewswire/ — Aridis Pharmaceuticals, Inc. (Nasdaq: ARDS), a biopharmaceutical company focused on the discovery and development of novel anti-infective therapies to treat life-threatening bacterial infections, announced today that it has app

October 2, 2019 EX-10.1

License, Development and Commercialization Agreement between Aridis Pharmaceuticals Inc. and Serum AMR Products, entered into as of September 27, 2019 (filed with the Registrant’s Current Report on Form 8-K on October 2, 2019 and incorporated herein by reference)

Exhibit 10.1 [*] Certain information in this document has been omitted from this exhibit because it is both (i) not material and (ii) would be competitively harmful if publicly disclosed. LICENSE, DEVELOPMENT AND COMMERCIALIZATION AGREEMENT This LICENSE, DEVELOPMENT AND COMMERCIALIZATION AGREEMENT (the “Agreement”) is entered into as of September 27th, 2019 (the “Effective Date”) by and between AR

October 2, 2019 EX-99.1

Aridis Pharmaceuticals Executes License Agreement with The Serum Institute of India, Ltd for Exclusive Rights to Products and Utilization of MabIgX® Platform Technology

Exhibit 99.1 Aridis Pharmaceuticals Executes License Agreement with The Serum Institute of India, Ltd for Exclusive Rights to Products and Utilization of MabIgX® Platform Technology SAN JOSE, Calif., September 30, 2019 /PRNewswire/ — Aridis Pharmaceuticals, Inc. (Nasdaq: ARDS), a biopharmaceutical company focused on the discovery and development of novel anti-infective therapies to treat life-thre

October 2, 2019 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) September 27, 2019 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdiction of incorporation) (Com

September 27, 2019 EX-99.1

Aridis Pharmaceuticals to Present at the 2019 Cantor Global Healthcare Conference

Exhibit 99.1 Aridis Pharmaceuticals to Present at the 2019 Cantor Global Healthcare Conference SAN JOSE, Calif., September 27, 2019 /PRNewswire/ — Aridis Pharmaceuticals, Inc. (Nasdaq: ARDS), a biopharmaceutical company focused on the discovery and development of novel anti-infective therapies to treat life-threatening bacterial infections, announced today that Vu Truong, Ph.D., Chief Executive Of

September 27, 2019 EX-99.2

Aridis Pharmaceuticals to Present AR-105 and AR-501 (Gallium Citrate) Data at IDWeek™ 2019

EX-99.2 3 a19-191451ex99d2.htm EX-99.2 Exhibit 99.2 Aridis Pharmaceuticals to Present AR-105 and AR-501 (Gallium Citrate) Data at IDWeek™ 2019 SAN JOSE, Calif., September 27, 2019 /PRNewswire/ — Aridis Pharmaceuticals, Inc. (Nasdaq: ARDS), a biopharmaceutical company focused on the discovery and development of novel anti-infective therapies to treat life-threatening bacterial infections, announced

September 27, 2019 8-K

Financial Statements and Exhibits, Other Events

8-K 1 a19-1914518k.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) September 27, 2019 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdic

September 9, 2019 EX-99.1

Aridis Pharmaceuticals to Present at the H.C. Wainwright 21st Annual Global Investment Conference on September 10, 2019

Exhibit 99.1 Aridis Pharmaceuticals to Present at the H.C. Wainwright 21st Annual Global Investment Conference on September 10, 2019 SAN JOSE, Calif., September 8, 2019 /PRNewswire/ — Aridis Pharmaceuticals, Inc. (Nasdaq: ARDS), a biopharmaceutical company focused on the discovery and development of novel anti-infective therapies to treat life-threatening bacterial infections, announced today that

September 9, 2019 8-K

Financial Statements and Exhibits, Other Events

8-K 1 a19-1843318k.htm 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported) September 8, 2019 Aridis Pharmaceuticals, Inc. (Exact name of registrant as specified in its charter) Delaware 001-38630 47-2641188 (State or other jurisdict

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