VERX / Vertex, Inc. - Depositi SEC, Relazione annuale, dichiarazione di delega

Vertex, Inc.
US ˙ NasdaqGM ˙ US92538J1060

Statistiche di base
LEI 549300QMYW171MP1PL50
CIK 1806837
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 Vertex, Inc.
SEC Filings (Chronological Order)
Questa pagina fornisce un elenco completo e cronologico dei depositi SEC, esclusi i documenti di proprietà che forniamo altrove.
August 6, 2025 10-Q

v UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

Table of Contents v UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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, 2025 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: 001-39413 VERTEX, INC.

August 6, 2025 EX-99.1

Vertex Announces Second Quarter 2025 Financial Results

Exhibit 99.1 Vertex Announces Second Quarter 2025 Financial Results KING OF PRUSSIA, PA – August 6, 2025: Vertex, Inc. (NASDAQ: VERX) (“Vertex” or the “Company”), a leading global provider of indirect tax solutions, today announced financial results for its second quarter ended June 30, 2025. “This quarter’s results were in line with expectations, with double-digit revenue growth and healthy profi

August 6, 2025 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 6, 2025 VERTEX, INC. (Exac

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 6, 2025 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Commis

June 17, 2025 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 11, 2025 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Commiss

May 7, 2025 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 7, 2025 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Commissio

May 7, 2025 EX-99.1

Vertex Announces First Quarter 2025 Financial Results

Exhibit 99.1 Vertex Announces First Quarter 2025 Financial Results KING OF PRUSSIA, PA – May 7, 2025: Vertex, Inc. (NASDAQ: VERX) (“Vertex” or the “Company”), a leading global provider of indirect tax solutions, today announced financial results for its first quarter ended March 31, 2025. “Vertex continued to perform well in the first quarter, setting us up for a strong 2025,” said David DeStefano

May 7, 2025 10-Q

v UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

Table of Contents v UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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, 2025 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: 001-39413 VERTEX, INC.

April 28, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION 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 Statement ☒ Definitive Additional Materials ☐ Soliciting Material Pursuant to §240.

April 28, 2025 DEF 14A

CEO Pay R UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1

Table of Contents CEO Pay R UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION 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 Statement ☐ Definitive Additional Materials ☐ Soliciting Material Pursuant to §240.

March 19, 2025 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): March 19, 2025 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Commis

March 19, 2025 EX-99.1

2 Safe Harbor Forward Looking Statements Any statements made in this presentation that are not statements of historical fact, including statements about our beliefs and expectations, are forward-looking statements and should be evaluated as such. For

Exhibit 99.1 Driving Durable Growth by Solving Indirect Tax Complexity Investor Day | March 19, 2025 2 Safe Harbor Forward Looking Statements Any statements made in this presentation that are not statements of historical fact, including statements about our beliefs and expectations, are forward-looking statements and should be evaluated as such. Forward-looking statements include information conce

February 27, 2025 EX-3.2

Second Amended and Restated Bylaws of Vertex, Inc.

‌Exhibit 3.2 Second Amended and Restated Bylaws of Vertex, Inc. (a Delaware corporation) Table of Contents Page Article I - Corporate Offices‌1 1.1 Registered Office1 1.2 Other Offices1 Article II - Meetings of Stockholders‌1 2.1 Place of Meetings1 2.2 Annual Meeting1 2.3 Special Meeting1 2.4 Notice of Business to be Brought before a Meeting.2 2.5 Notice of Nominations for Election to the Board of

February 27, 2025 EX-24.1

Power of Attorney

‌Exhibit 24.1 POWER OF ATTORNEY KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned, a member of the Board of Directors of Vertex, Inc., a Delaware corporation (the "Company"), with its principal executive offices in King of Prussia, Pennsylvania, do hereby constitute, designate and appoint each of John Schwab and Bryan Rowland, each of whom are officers of the Company, as my true and lawful

February 27, 2025 EX-99.1

Vertex Announces Fourth Quarter and Full Year 2024 Financial Results

Exhibit 99.1 Vertex Announces Fourth Quarter and Full Year 2024 Financial Results KING OF PRUSSIA, PA – February 27, 2025: Vertex, Inc. (NASDAQ: VERX) (“Vertex” or the “Company”), a leading global provider of indirect tax solutions, today announced financial results for its fourth quarter and full year ended December 31, 2024. “Vertex’s 2024 financial results demonstrated the power of our business

February 27, 2025 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): February 27, 2025 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Com

February 27, 2025 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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, 2024 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: 001-39413 VERTEX, INC.

February 27, 2025 EX-19.1

Insider Trading Policy

‌Exhibit 19.1 Vertex, Inc. Insider Trading Compliance Policy Contents Page Summary 2 Persons Covered and Administration of Policy 2 Statement of Policies Prohibiting Insider Trading 3 Quarterly Blackout Periods 4 Pre-Clearance of Transactions 5 Exempt Transactions 6 Additional Prohibited Transactions 6 Rule 10b5-1 Trading Plans 8 Policy Administration 9 Post-Termination of Transactions 9 Execution

November 14, 2024 SC 13G/A

VERX / Vertex, Inc. / Tensile Capital Management LP - SC 13G/A Passive Investment

SC 13G/A 1 d894016dsc13ga.htm SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b),(c) AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2 (Amendment No. 3)* VERTEX, INC. (Name of Issuer) Class A Common Stock (Title of Class of Securities) 92538J106 (CUSIP Numbe

November 14, 2024 SC 13G/A

VERX / Vertex, Inc. / ALGER ASSOCIATES INC - VERTEX, INC. Passive Investment

SC 13G/A 1 d890839dsc13ga.htm VERTEX, INC. UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 4)* Vertex, Inc. (Name of Issuer) Class A Common Stock (Title of Class of Securities) 92538J106 (CUSIP Number) September 30, 2024 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to

November 13, 2024 SC 13G/A

VERX / Vertex, Inc. / Radcliffe Amanda Westphal - SC 13G/A Passive Investment

Securities and Exchange Commission Washington, D.C. 20549 Schedule 13G (Rule 13d-102) Information to be Included in Statements Filed Pursuant to § 240.13d-1(b), (c) and (d) and Amendments Thereto Filed Pursuant to § 240.13d-2 UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 4)* Vertex, Inc. (Name of Issuer) Class A Common Stock, $0.001 par value per share (Title of Class of Securities) 925

November 13, 2024 SC 13G/A

VERX / Vertex, Inc. / Radcliffe Amanda Westphal - SC 13G/A Passive Investment

SC 13G/A 1 tm2428228d1sc13ga.htm SC 13G/A Securities and Exchange Commission Washington, D.C. 20549 Schedule 13G (Rule 13d-102) Information to be Included in Statements Filed Pursuant to § 240.13d-1(b), (c) and (d) and Amendments Thereto Filed Pursuant to § 240.13d-2 UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 4)* Vertex, Inc. (Name of Issuer) Class A Common Stock, $0.001 par value pe

November 8, 2024 EX-10.1

Amended and Restated Credit Agreement by and among Vertex, Inc., the guarantors party thereto, PNC Bank, National Association, as administrative agent, and the lenders party, thereto, dated as of November 4, 2024

Exhibit 10.1 EXECUTION COPY Customer CUSIP No.: 92534QAA2 Revolver Facility CUSIP No.: 92534QAD6    $300,000,000 REVOLVING CREDIT FACILITY AMENDED AND RESTATED CREDIT AGREEMENT by and among VERTEX, INC., as Borrower and THE GUARANTORS PARTY HERETO and THE LENDERS PARTY HERETO and PNC BANK, NATIONAL ASSOCIATION, as Administrative Agent Dated as of November 4, 2024 PNC CAPITAL MARKETS LLC, as Sole L

November 8, 2024 8-K

Entry into 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): November 4, 2024 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Comm

November 6, 2024 10-Q

v UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

Table of Contents v UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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, 2024 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: 001-39413 VERTEX, INC.

November 6, 2024 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 6, 2024 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Comm

November 6, 2024 EX-99.1

Vertex Announces Third Quarter 2024 Financial Results

Exhibit 99.1 Vertex Announces Third Quarter 2024 Financial Results KING OF PRUSSIA, PA – November 6, 2024: Vertex, Inc. (NASDAQ: VERX) (“Vertex” or the “Company”), a leading global provider of indirect tax solutions, today announced financial results for its third quarter ended September 30, 2024. “The third quarter of 2024 was another great quarter for Vertex”, stated David DeStefano, Vertex’s Pr

August 8, 2024 8-K

Unregistered Sales of Equity Securities

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 6, 2024 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Commis

August 7, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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, 2024 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: 001-39413 VERTEX, INC.

August 7, 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): August 7, 2024 VERTEX, INC. (Exac

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 7, 2024 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Commis

August 7, 2024 EX-99.1

Vertex Announces Second Quarter 2024 Financial Results

Exhibit 99.1 Vertex Announces Second Quarter 2024 Financial Results KING OF PRUSSIA, PA – August 7, 2024: Vertex, Inc. (NASDAQ: VERX) (“Vertex” or the “Company”), a leading global provider of indirect tax solutions, today announced financial results for its second quarter ended June 30, 2024. “The second quarter financial results demonstrate the true earnings power of the Vertex business model,” s

June 18, 2024 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 12, 2024 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Commiss

May 8, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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, 2024 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: 001-39413 VERTEX, INC.

May 8, 2024 EX-99.1

Vertex Announces First Quarter 2024 Financial Results

Exhibit 99.1 Vertex Announces First Quarter 2024 Financial Results KING OF PRUSSIA, PA – May 8, 2024: Vertex, Inc. (NASDAQ: VERX) (“Vertex” or the “Company”), a leading global provider of indirect tax solutions, today announced financial results for its first quarter ended March 31, 2024. “The year is off to a solid start, and I am very pleased with our financial performance in the first quarter,”

May 8, 2024 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 8, 2024 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Commissio

May 3, 2024 DEFR14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 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)) ¨ Definitive Proxy Statement x Definitive Additional Materials ¨ Soliciting Material Pursuant to §240.

April 29, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION 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 Statement ☒ Definitive Additional Materials ☐ Soliciting Material Pursuant to §240.

April 29, 2024 DEF 14A

CEO Pay R UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1

Table of Contents CEO Pay R UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION 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 Statement ☐ Definitive Additional Materials ☐ Soliciting Material Pursuant to §240.

April 26, 2024 EX-10.1

Form of Capped Call Confirmation

Exhibit 10.1 To:Vertex, Inc. 2301 Renaissance Blvd King of Prussia, PA 19406 From:[Dealer] Re:[Base]1 [Additional]2 Call Option Transaction Date:[], 2024 Dear Ladies and Gentlemen: The purpose of this communication (this “Confirmation”) is to set forth the terms and conditions of the call option transaction entered into on the Trade Date specified below (the “Transaction”) between [Dealer] (“Deale

April 26, 2024 8-K

Entry into a Material Definitive Agreement, Unregistered Sales of Equity Securities, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, 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): April 23, 2024 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Commis

April 26, 2024 EX-4.1

Indenture, dated April 26, 2024, between Vertex, Inc. and U.S. Bank Trust Company, National Association

Exhibit 4.1 Execution Version VERTEX, INC. and U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION as Trustee INDENTURE Dated as of April 26, 2024 0.750% Convertible Senior Notes due 2029 TABLE OF CONTENTS Page Article 1 Definitions; Rules of Construction‌1 Section 1.01. Definitions.‌1 Section 1.02. Other Definitions.‌13 Section 1.03. Rules of Construction.‌14 Article 2 The Notes‌15 Section 2.01. Form,

April 26, 2024 EX-99.1

Vertex, Inc. Announces Closing of Upsized Offering of $345 Million Convertible Senior Notes

Exhibit 99.1 Vertex, Inc. Announces Closing of Upsized Offering of $345 Million Convertible Senior Notes KING OF PRUSSIA, Pa. — April 26, 2024 — Vertex, Inc. (NASDAQ: VERX) (“Vertex”), a leading global provider of indirect tax solutions, today announced the closing of its private offering of $345 million aggregate principal amount of 0.750% convertible senior notes due 2029 (the “notes”) to person

April 24, 2024 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): April 23, 2024 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Commis

April 24, 2024 EX-99.1

Vertex, Inc. Announces Pricing of Upsized $300 Million Convertible Senior Notes Offering

Exhibit 99.1 Vertex, Inc. Announces Pricing of Upsized $300 Million Convertible Senior Notes Offering KING OF PRUSSIA, Pa. — April 23, 2024 — Vertex, Inc. (NASDAQ: VERX) (“Vertex”), a leading global provider of indirect tax solutions, today announced the pricing of $300 million aggregate principal amount of 0.750% convertible senior notes due 2029 (the “notes”) in a private offering to qualified i

April 23, 2024 EX-10.1

Fourth Amendment to Credit Agreement by and among Vertex, Inc., the guarantors party thereto, PNC Bank, National Association, as administrative agent, and the lenders party, thereto, dated as of April 19, 2024.

Exhibit 10.1 EXECUTION COPY FOURTH AMENDMENT TO CREDIT AGREEMENT FOURTH AMENDMENT TO CREDIT AGREEMENT (this “Amendment”), dated as of April 19, 2024, by and among (i) VERTEX, INC. (the “Borrower”), (ii) VERTEX VAT SOLUTIONS, LLC and VERTEX DELAWARE, LLC (collectively, the “Guarantors”; together with the Borrower, individually a “Loan Party” and collectively, the “Loan Parties”), (iii) the Lenders

April 23, 2024 EX-99.2

Vertex, Inc. Announces Proposed Private Offering of $250 Million of Convertible Senior Notes

Exhibit 99.2 Vertex, Inc. Announces Proposed Private Offering of $250 Million of Convertible Senior Notes KING OF PRUSSIA, Pa. — April 22, 2024—Vertex, Inc. (NASDAQ: VERX) (“Vertex”), a leading global provider of indirect tax solutions, today announced that it intends to offer and sell, subject to market conditions and other factors, $250 million aggregate principal amount of convertible senior no

April 23, 2024 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, 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 19, 2024 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Commis

April 23, 2024 EX-99.1

Vertex Provides Preliminary Financial Results for First Quarter 2024 and Announces First Quarter Earnings Call Date

‌Exhibit 99.1 Vertex Provides Preliminary Financial Results for First Quarter 2024 and Announces First Quarter Earnings Call Date KING OF PRUSSIA, PA – April 22, 2024 – Vertex, Inc. (NASDAQ:VERX), a leading global technology provider of indirect tax solutions, today announced preliminary financial results for the period ended March 31, 2024. “Vertex’s first quarter financial results were strong ac

February 29, 2024 EX-99.1

Vertex Announces Fourth Quarter and Full Year 2023 Financial Results

Exhibit 99.1 Vertex Announces Fourth Quarter and Full Year 2023 Financial Results KING OF PRUSSIA, PA – February 29, 2024: Vertex, Inc. (NASDAQ: VERX) (“Vertex” or the “Company”), a leading global provider of indirect tax solutions, today announced financial results for its fourth quarter and full year ended December 31, 2023. “The Vertex execution engine delivered exceptionally strong financial r

February 29, 2024 EX-24.1

Power of Attorney

‌Exhibit 24.1 POWER OF ATTORNEY KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned, a member of the Board of Directors of Vertex, Inc., a Delaware corporation (the "Company"), with its principal executive offices in King of Prussia, Pennsylvania, do hereby constitute, designate and appoint each of John Schwab and Bryan Rowland, each of whom are officers of the Company, as my true and lawful

February 29, 2024 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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, 2023 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: 001-39413 VERTEX, INC.

February 29, 2024 EX-97.1

Vertex, Inc. Policy for Recovery of Erroneously Awarded Compensation

‌Exhibit 97.1 VERTEX, INC. POLICY FOR RECOVERY OF ERRONEOUSLY AWARDED COMPENSATION Vertex, Inc. (the “Company”) has adopted this Policy for Recovery of Erroneously Awarded Compensation (the “Policy”), effective as of October 2, 2023 (the “Effective Date”). Capitalized terms used in this Policy but not otherwise defined herein are defined in Section 11. 1. Persons Subject to Policy This Policy shal

February 29, 2024 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): February 29, 2024 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Com

February 28, 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): February 22, 2024 VERTEX, INC. (E

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 22, 2024 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Com

February 14, 2024 SC 13G/A

VERX / Vertex, Inc. / ALGER ASSOCIATES INC - VERTEX, INC. Passive Investment

SC 13G/A 1 d744344dsc13ga.htm VERTEX, INC. UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 3)* Vertex, Inc. (Name of Issuer) Class A Common Stock (Title of Class of Securities) 92538J106 (CUSIP Number) December 31, 2023 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to d

February 14, 2024 SC 13G/A

VERX / Vertex, Inc. / Tensile Capital Management LP - SC 13G/A Passive Investment

SC 13G/A 1 d743226dsc13ga.htm SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b),(c) AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2 (Amendment No. 2)* VERTEX, INC. (Name of Issuer) Class A Common Stock (Title of Class of Securities) 92538J106 (CUSIP Numbe

February 13, 2024 SC 13G/A

VERX / Vertex, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv02210-vertexincclassa.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 3)* Name of issuer: Vertex, Inc. Class A Title of Class of Securities: Common Stock CUSIP Number: 92538J106 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box to designa

February 12, 2024 SC 13G/A

VERX / Vertex, Inc. / Neuberger Berman Group LLC Passive Investment

SC 13G/A 1 formsc13ga-02122024070213.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 4)* Vertex, Inc. (Name of Issuer) COMMON (Title of Class of Securities) 92538J106 (CUSIP Number) December 31, 2023 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the r

February 12, 2024 SC 13G/A

VERX / Vertex, Inc. / Radcliffe Amanda Westphal - SC 13G/A Passive Investment

SC 13G/A 1 tm245883d1sc13ga.htm SC 13G/A Securities and Exchange Commission Washington, D.C. 20549 Schedule 13G (Rule 13d-102) Information to be Included in Statements Filed Pursuant to § 240.13d-1(b), (c) and (d) and Amendments Thereto Filed Pursuant to § 240.13d-2 UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 3)* Vertex, Inc. (Name of Issuer) Class A Common Stock, $0.001 par value per

January 5, 2024 SC 13G/A

JP:5290 / Vertex Corporation / Conestoga Capital Advisors, LLC - CONESTOGA CAPITAL ADVISORS Passive Investment

SC 13G/A 1 verxa410524.htm CONESTOGA CAPITAL ADVISORS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 4)* VERTEX, INC. (Name of Issuer) (Class A) Class A Common Stock, Par Value $0.001 Per Share (Title of Class of Securities) 92538j106 (CUSIP Number) December 31, 2023 (Date of Event which Requires Filing

December 13, 2023 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): December 13, 2023 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Com

December 13, 2023 EX-99.1

Vertex, Inc. Announces Offer to Acquire E-Invoicing Leader Pagero Extends Vertex’s Leadership in Indirect Tax Compliance and Accelerates Expansion in Key International Markets Creates Seamless, End-to-End Global Platform to Help Customers Enhance Eff

Exhibit 99.1 FOR IMMEDIATE RELEASE Vertex, Inc. Announces Offer to Acquire E-Invoicing Leader Pagero Extends Vertex’s Leadership in Indirect Tax Compliance and Accelerates Expansion in Key International Markets Creates Seamless, End-to-End Global Platform to Help Customers Enhance Efficiency While Navigating New and Emerging Compliance Mandates Acquisition Financing to Include New Strategic Invest

December 13, 2023 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): December 12, 2023 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Com

December 13, 2023 EX-10.1

Investment Agreement, dated as of December 12, 2023.

Exhibit 10.1 Execution Version VERTEX, INC. INVESTMENT AGREEMENT December 12, 2023 Table of Contents Page Section 1. Definitions 1 Section 2. Rules of Construction 10 (a) Generally 10 Section 3. The Purchase and Sale 10 (a) Generally 10 (b) The Closing 11 Section 4. Representations, Warranties and Covenants of the Company 12 (a) Due Formation, Valid Existence and Good Standing; Power to Perform Ob

December 13, 2023 EX-10.2

Third Amendment to Credit Agreement by and among Vertex, Inc., the guarantors party thereto, PNC Bank, National Association, and the lenders party, thereto, dated as of December 12, 2023.

Exhibit 10.2 EXECUTION COPY THIRD AMENDMENT TO CREDIT AGREEMENT THIRD AMENDMENT TO CREDIT AGREEMENT (this “Amendment”), dated as of December 12, 2023, by and among (i) VERTEX, INC. (the “Borrower”), (ii) VERTEX VAT SOLUTIONS, LLC and VERTEX DELAWARE, LLC (collectively, the “Guarantors”; together with the Borrower, individually a “Loan Party” and collectively, the “Loan Parties”), (iii) the Lenders

December 13, 2023 EX-99.2

Forward-Looking Statements 2 Any statements made in this presentation that are not statements of historical fact, including statements about our beliefs and expectations, are forward-looking statements and should be evaluated as such. Forward-looking

Exhibit 99.2 Vertex Offer to Acquire E-Invoicing Leader Pagero DECEMBER 13, 2023 1 Forward-Looking Statements 2 Any statements made in this presentation that are not statements of historical fact, including statements about our beliefs and expectations, are forward-looking statements and should be evaluated as such. Forward-looking statements include, among other things, statements about the antic

December 7, 2023 SC 13G/A

VERX / Vertex Inc Class A / JPMORGAN CHASE & CO - FILING VERTEX, INC. Passive Investment

Schedule 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 04)* VERTEX, INC. (Name of Issuer) Class A Common Stock, Par Value $0.001 Per Share (Title of Class of Securities) 92538J106 (CUSIP Number) November 30, 2023 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to de

November 9, 2023 EX-99.1

Vertex Announces Third Quarter 2023 Financial Results

Exhibit 99.1 Vertex Announces Third Quarter 2023 Financial Results KING OF PRUSSIA, PA – November 9, 2023: Vertex, Inc. (NASDAQ: VERX) (“Vertex” or the “Company”), a leading global provider of indirect tax solutions, today announced financial results for its third quarter ended September 30, 2023. “We delivered strong results in the third quarter, reflecting our recent growth investments”, noted D

November 9, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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 For the transition period from to Commission File Number: 001-39413 VERTEX, INC.

November 9, 2023 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 9, 2023 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Comm

August 9, 2023 EX-99.1

Vertex Announces Second Quarter 2023 Financial Results

Exhibit 99.1 Vertex Announces Second Quarter 2023 Financial Results KING OF PRUSSIA, PA – August 9, 2023: Vertex, Inc. (NASDAQ: VERX) (“Vertex” or the “Company”), a leading global provider of indirect tax solutions, today announced financial results for its second quarter ended June 30, 2023. David DeStefano, President, Chief Executive Officer, and Chairperson of the Board stated “The return on ou

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 9, 2023 VERTEX, INC. (Exac

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 9, 2023 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Commis

August 9, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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 For the transition period from to Commission File Number: 001-39413 VERTEX, INC.

June 16, 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 13, 2023 VERTEX, INC. (Exact

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 13, 2023 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Commiss

May 10, 2023 EX-99.1

Vertex Announces First Quarter 2023 Financial Results

Exhibit 99.1 Vertex Announces First Quarter 2023 Financial Results KING OF PRUSSIA, PA – May 10, 2023: Vertex, Inc. (NASDAQ: VERX) (“Vertex” or the “Company”), a leading global provider of indirect tax solutions, today announced financial results for its first quarter ended March 31, 2023. David DeStefano, President, Chief Executive Officer, and Chairperson of the Board stated “Companies all aroun

May 10, 2023 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 10, 2023 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Commissi

May 10, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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 For the transition period from to Commission File Number: 001-39413 VERTEX, INC.

April 28, 2023 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION 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 Statement ☒ Definitive Additional Materials ☐ Soliciting Material Pursuant to §240.

April 28, 2023 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION 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 Statement ☐ Definitive Additional Materials ☐ Soliciting Material Pursuant to §240.

March 10, 2023 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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: 333-239644 VERTEX, INC.

March 8, 2023 EX-99.1

Vertex Announces Fourth Quarter and Full Year 2022 Financial Results

Exhibit 99.1 Vertex Announces Fourth Quarter and Full Year 2022 Financial Results KING OF PRUSSIA, PA – March 8, 2023: Vertex, Inc. (NASDAQ: VERX) (“Vertex” or the “Company”), a leading global provider of indirect tax solutions, today announced financial results for its fourth quarter and full year ended December 31, 2022. David DeStefano, Chief Executive Officer, stated “The fourth quarter wrappe

March 8, 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 8, 2023 VERTEX, INC. (Exact

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, 2023 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Commiss

February 14, 2023 SC 13G/A

VERX / Vertex, Inc. Class A / ALGER ASSOCIATES INC - VERTEX, INC. Passive Investment

SC 13G/A 1 d404706dsc13ga.htm VERTEX, INC. UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2)* Vertex, Inc. (Name of Issuer) Class A Common Stock (Title of Class of Securities) 92538J106 (CUSIP Number) December 31, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to d

February 14, 2023 SC 13G/A

VERX / Vertex, Inc. Class A / Tensile Capital Management LP - SC 13G/A Passive Investment

SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b),(c) AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2 (Amendment No. 1)* VERTEX, INC. (Name of Issuer) Class A Common Stock (Title of Class of Securities) 92538J106 (CUSIP Number) December 31, 2022 (Date of

February 10, 2023 SC 13G/A

VERX / Vertex, Inc. Class A / Radcliffe Amanda Westphal - SC 13G/A Passive Investment

Securities and Exchange Commission Washington, D.C. 20549 Schedule 13G (Rule 13d-102) Information to be Included in Statements Filed Pursuant to § 240.13d-1(b), (c) and (d) and Amendments Thereto Filed Pursuant to § 240.13d-2 UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 2)* Vertex, Inc. (Name of Issuer) Class A Common Stock, $0.001 par value per share (Title of Class of Securities) 925

February 10, 2023 SC 13G/A

VERX / Vertex, Inc. Class A / DeStefano David - SC 13G/A Passive Investment

SC 13G/A 1 tm236116d1sc13ga.htm SC 13G/A United States Securities and Exchange Commission Washington, D.C. 20549 Schedule 13G (Rule 13d-102) Information to be Included in Statements Filed Pursuant to § 240.13d-1(b), (c) and (d) and Amendments Thereto Filed Pursuant to § 240.13d-2 UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 2)* VERTEX, INC. (Name of Issuer) Class A Common Stock (Title

February 10, 2023 SC 13G/A

VERX / Vertex, Inc. Class A / Neuberger Berman Group LLC - NONE Passive Investment

SC 13G/A 1 doc1.htm NONE UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 3)* VERTEX INC (Name of Issuer) COMMON (Title of Class of Securities) 92538J106 (CUSIP Number) December 31, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to whic

February 9, 2023 SC 13G/A

VERX / Vertex, Inc. Class A / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv02180-vertexincclassa.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 2)* Name of issuer: Vertex Inc. Class A Title of Class of Securities: Common Stock CUSIP Number: 92538J106 Date of Event Which Requires Filing of this Statement: December 30, 2022 Check the appropriate box to designat

January 27, 2023 SC 13G/A

VERX / Vertex, Inc. Class A / JPMORGAN CHASE & CO - FILING VERTEX, INC. Passive Investment

Schedule 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 03)* VERTEX, INC. (Name of Issuer) Class A Common Stock, Par Value $0.001 Per Share (Title of Class of Securities) 92538J106 (CUSIP Number) December 30, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to de

January 19, 2023 SC 13G/A

JP:5290 / Vertex Corp/Japan / Conestoga Capital Advisors, LLC - CONESTOGA CAPITAL ADVISORS Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 3)* VERTEX, INC. (Name of Issuer) (Class A) Class A Common Stock, Par Value $0.001 Per Share (Title of Class of Securities) 92538j106 (CUSIP Number) December 31, 2022 (Date of Event which Requires Filing of this Statement) Check the appropriate box to design

November 22, 2022 EX-1.1

Underwriting Agreement, dated as of November 17, 2022, by and among Vertex, Inc., the Selling Stockholder and Goldman Sachs & Co. LLC.

EX-1.1 2 verx-20221117xex1d1.htm EX-1.1 Exhibit 1.1 Execution Version Vertex, Inc. Class A Common Stock, par value $0.001 per share Underwriting Agreement November 17, 2022 Goldman Sachs & Co. LLC 200 West Street, New York, New York 10282-2198 Ladies and Gentlemen: The 2009 Jeffrey R. Westphal Generation‐Skipping Trust (the “Selling Stockholder”) proposes, subject to the terms and conditions state

November 22, 2022 8-K

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): November 17, 2022 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization)

November 18, 2022 424B7

VERTEX, INC. 1,500,000 Shares of Class A Common Stock

Table of Contents Filed Pursuant to Rule 424(b)(7) Registration No. 333-266168 ? ? ? PROSPECTUS SUPPLEMENT (To prospectus dated July 25, 2022) ? ? VERTEX, INC. ? 1,500,000 Shares of Class A Common Stock The selling stockholder of Vertex, Inc. referred to in this prospectus supplement is offering 1,500,000 shares of our Class A common stock, par value $0.001 per share (?Class A common stock?). The

November 17, 2022 424B7

Subject to Completion Preliminary Prospectus Supplement dated November 17, 2022

Table of Contents Filed Pursuant to Rule 424(b)(7) Registration No. 333-266168 ? This preliminary prospectus supplement relates to an effective registration statement under the Securities Act of 1933, as amended, but is not complete and may be changed. This preliminary prospectus supplement and the accompanying prospectus are not an offer to sell these securities and they are not soliciting an off

November 9, 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 9, 2022 VERTEX, INC. (Ex

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 9, 2022 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Comm

November 9, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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 For the transition period from to Commission File Number: 001-39413 VERTEX, INC.

November 9, 2022 EX-99.1

Vertex Announces Third Quarter 2022 Financial Results

Exhibit 99.1 Vertex Announces Third Quarter 2022 Financial Results KING OF PRUSSIA, PA – November 9, 2022: Vertex, Inc. (NASDAQ: VERX) (“Vertex” or the “Company”), a leading global provider of indirect tax solutions, today announced financial results for its third quarter ended September 30, 2022. “In the third quarter, Vertex once again delivered healthy double-digit revenue growth and solid oper

August 9, 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 9, 2022 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Co

August 9, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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 For the transition period from to Commission File Number: 001-39413 VERTEX, INC.

August 9, 2022 EX-99.1

Vertex Announces Second Quarter 2022 Financial Results

? Exhibit 99.1 Vertex Announces Second Quarter 2022 Financial Results KING OF PRUSSIA, PA ? August 9, 2022: Vertex, Inc. (NASDAQ: VERX) (?Vertex? or the ?Company?), a leading global provider of indirect tax solutions, today announced financial results for its second quarter ended June 30, 2022. ? ?I?m incredibly proud of the entire global Vertex team for delivering another quarter of strong perfor

August 5, 2022 SC 13G

VERX / Vertex, Inc. Class A / Tensile Capital Management LP - SC 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G (Rule 13d-102) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b),(c) AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2 (Amendment No. ) VERTEX, INC. (Name of Issuer) Class A Common Stock (Title of Class of Securities) 92538J106 (CUSIP Number) July 27, 2022 (Date of Event Which Req

July 25, 2022 CORRESP

Vertex, Inc. 2301 Renaissance Blvd King of Prussia, Pennsylvania 19406

Vertex, Inc. 2301 Renaissance Blvd King of Prussia, Pennsylvania 19406 ? July 25, 2022 Via EDGAR Transmission Securities and Exchange Commission Division of Corporation Finance Mail Stop 3010 100 F Street, N.E. Washington, D.C. 20549 ? Re: Vertex, Inc. Registration Statement on Form S-3 (Registration No. 333-266168) Ladies and Gentlemen: In accordance with Rule 461 under the Securities Act of 1933

July 15, 2022 S-3

As filed with the Securities and Exchange Commission on July 15, 2022

Table of Contents As filed with the Securities and Exchange Commission on July 15, 2022 ? Registration No.

July 15, 2022 EX-FILING FEES

Filing Fee Table.

Exhibit 107 Calculation of Filing Fee Table Form S-3 (Form Type) Vertex, Inc. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities ? ? ? ? ? ? ? ? ? ? ? Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit(1) Maximum Aggregate Offering Price Fee Rate Amount of Reg

June 16, 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 14, 2022 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Commiss

May 10, 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 10, 2022 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Comm

May 10, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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, 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: 001-39413 VERTEX, INC.

May 10, 2022 EX-99.1

Vertex Announces First Quarter 2022 Financial Results

? Exhibit 99.1 Vertex Announces First Quarter 2022 Financial Results KING OF PRUSSIA, PA ? May 10, 2022: Vertex, Inc. (NASDAQ: VERX) (?Vertex? or the ?Company?), a global provider of tax technology solutions, today announced financial results for its first quarter ended March 31, 2022. ? ?We delivered strong performance in the first quarter, with outstanding execution from our teams around the wor

April 27, 2022 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

DEFA14A 1 tmb-20220427xdefa14a.htm DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION 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 P

April 27, 2022 DEF 14A

The information specifically incorporated by reference into our Annual Report on Form 10-K from our Definitive Proxy Statement on Schedule 14A, filed with the SEC on April 27, 2022.

DEF 14A 1 tmb-20220614xdef14a.htm DEF 14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION 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

March 21, 2022 S-8

As filed with the United States Securities and Exchange Commission on March 18, 2022

? As filed with the United States Securities and Exchange Commission on March 18, 2022 Registration No.

March 21, 2022 EX-FILING FEES

Filing Fee Table

? Exhibit 107 Calculation of Filing Fee Tables Form S-8 (Form Type) Vertex, Inc. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities ? ? ? ? ? ? ? ? ? ? ? ? ? Security Type Title of Securities to be Registered Fee Calculation Rule Amount Registered (1) Proposed Maximum Offering Price Per Share Maximum Aggregate Offering Price Fee Rate Amount of Registration

March 16, 2022 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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, 2021 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: 333-239644 VERTEX, INC.

March 9, 2022 EX-99.1

Vertex Announces Fourth Quarter and Full Year 2021 Financial Results

? Exhibit 99.1 Vertex Announces Fourth Quarter and Full Year 2021 Financial Results KING OF PRUSSIA, PA ? March 9, 2022: Vertex, Inc. (NASDAQ: VERX) (?Vertex? or the ?Company?), a global provider of tax technology solutions, today announced financial results for its fourth quarter and full year ended December 31, 2021. ? ?We delivered strong performance in 2021, with outstanding execution from our

March 9, 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 9, 2022 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Commiss

March 9, 2022 EX-10.1

Second Amendment to the Credit Agreement by and among Vertex, Inc., the guarantors party thereto, PNC Bank, National Association, and the lenders party thereto, dated as of March 8, 2022.

EXECUTION COPY ? ? SECOND AMENDMENT TO CREDIT AGREEMENT SECOND AMENDMENT TO CREDIT AGREEMENT (this ?Amendment?), dated as of March 8, 2022, by and among (i) VERTEX, INC.

March 9, 2022 8-K

Entry into 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): March 9, 2022 ? ? VERTEX, INC. (Exact name of registrant as specified in its charter) ? ? ? ? ? Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporati

February 14, 2022 SC 13G/A

VERX / Vertex, Inc. Class A / Neuberger Berman Group LLC - NONE Passive Investment

SC 13G/A 1 doc1.htm NONE UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 02)* VERTEX INC (Name of Issuer) COMMON (Title of Class of Securities) 92538J106 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to whi

February 11, 2022 SC 13G/A

VERX / Vertex, Inc. Class A / Radcliffe Amanda Westphal - SC 13G/A Passive Investment

Securities and Exchange Commission Washington, D.C. 20549 Schedule 13G (Rule 13d-102) Information to be Included in Statements Filed Pursuant to ? 240.13d-1(b), (c) and (d) and Amendments Thereto Filed Pursuant to ? 240.13d-2 UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 1)* Vertex, Inc. (Name of Issuer) Class A Common Stock, $0.001 par value per share (Title of Class of Securities) 925

February 11, 2022 SC 13G/A

VERX / Vertex, Inc. Class A / Capital International Investors - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1 )* Vertex, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 92538J106 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule

February 10, 2022 SC 13G/A

VERX / Vertex, Inc. Class A / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 1)* Name of issuer: Vertex Inc. Title of Class of Securities: Common Stock CUSIP Number: 92538J106 Date of Event Which Requires Filing of this Statement: December 31, 2021 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ??Rule 13

February 10, 2022 SC 13G/A

VERX / Vertex, Inc. Class A / DeStefano David - SC 13G/A Passive Investment

United States Securities and Exchange Commission Washington, D.C. 20549 Schedule 13G (Rule 13d-102) Information to be Included in Statements Filed Pursuant to ? 240.13d-1(b), (c) and (d) and Amendments Thereto Filed Pursuant to ? 240.13d-2 UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 1)* VERTEX, INC. (Name of Issuer) Class A Common Stock (Title of Class of Securities) 92538J106 (CUSIP

February 2, 2022 SC 13G/A

VERX / Vertex, Inc. Class A / MASSACHUSETTS FINANCIAL SERVICES CO /MA/ - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1 )* VERTEX, INC. (Name of Issuer) Common Stock (Title of Class of Securities) 92538J106 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule

January 27, 2022 SC 13G/A

VERX / Vertex, Inc. Class A / WELLS FARGO & COMPANY/MN Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1) VERTEX INC (Name of Issuer) CL A (Title of Class of Securities) 92538J106 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: [X

January 18, 2022 SC 13G/A

VERX / Vertex, Inc. Class A / JPMORGAN CHASE & CO - FILING VERTEX, INC. Passive Investment

Schedule 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 02)* VERTEX, INC. (Name of Issuer) Class A Common Stock, Par Value $0.001 Per Share (Title of Class of Securities) 92538J106 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to de

January 10, 2022 SC 13G/A

JP:5290 / Vertex Corp/Japan / Conestoga Capital Advisors, LLC - CONESTOGA CAPITAL ADVISORS Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2)* VERTEX, INC. (Name of Issuer) (Class A) Class A Common Stock, Par Value $0.001 Per Share (Title of Class of Securities) 92538j106 (CUSIP Number) December 31, 2021 (Date of Event which Requires Filing of this Statement) Check the appropriate box to design

January 10, 2022 SC 13G/A

VERX / Vertex, Inc. Class A / ALGER ASSOCIATES INC - VERTEX, INC. Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* Vertex, Inc. (Name of Issuer) Class A Common Stock (Title of Class of Securities) 92538J106 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Sc

November 12, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

Table of Contents ? ? ? ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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, 2021 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: 001-39413 VERTEX, INC.

November 10, 2021 EX-99.1

Vertex Announces Third Quarter 2021 Financial Results

? Exhibit 99.1 Vertex Announces Third Quarter 2021 Financial Results KING OF PRUSSIA, PA ? November 10, 2021: Vertex, Inc. (NASDAQ: VERX) (?Vertex? or the ?Company?), a global provider of tax technology solutions, today announced financial results for its third quarter ended September 30, 2021. ? ?The shift to e-commerce has accelerated, becoming a preferred method for consumers and a profitable o

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 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Com

August 12, 2021 EX-10.1

Amendment to S Corporation Termination and Tax Sharing Agreement

? Exhibit 10.1 ? AMENDMENT TO S CORPORATION TERMINATION AND TAX SHARING AGREEMENT ? The S Corporation Termination and Tax Sharing Agreement, dated as of July 27, 2020 (the ?Agreement?), made by and between Vertex, Inc., a Delaware corporation (the ?Company?), and the trusts and individuals identified on the signature page thereto (each a ?Shareholder? and collectively the ?Shareholders?) is hereby

August 12, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

Table of Contents ? ? ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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, 2021 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: 001-39413 VERTEX, INC.

August 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): August 11, 2021 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (C

August 11, 2021 EX-99.1

Vertex Announces Second Quarter 2021 Financial Results

? Exhibit 99.1 Vertex Announces Second Quarter 2021 Financial Results KING OF PRUSSIA, PA ? August 11, 2021: Vertex, Inc. (NASDAQ: VERX) (?Vertex? or the ?Company?), a global provider of tax technology solutions, today announced financial results for its second quarter ended June 30, 2021. ? ?Our performance reflects strong demand across all our segments and product lines this quarter, as global b

June 8, 2021 SC 13G/A

VERX / Vertex, Inc. Class A / JPMORGAN CHASE & CO - FILING VERTEX, INC. Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 01)* VERTEX, INC. (Name of Issuer) Class A Common Stock, Par Value $0.001 Per Share (Title of Class of Securities) 92538J106 (CUSIP Number) May 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule p

May 17, 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): May 11, 2021 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Commissi

May 13, 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 13, 2021 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Comm

May 13, 2021 EX-99.1

Vertex Acquires Taxamo to Expand Global Commerce and Compliance Solutions European specialist in tax automation for e-commerce and marketplaces

? Exhibit 99.1 Vertex Acquires Taxamo to Expand Global Commerce and Compliance Solutions European specialist in tax automation for e-commerce and marketplaces ? KING OF PRUSSIA, PA ? May 13, 2021 ? Vertex, Inc. (NASDAQ: VERX) (?Vertex? or the ?Company?), a leading global provider of tax technology solutions, today announced it has acquired Taxamo, a cloud-based pioneer in tax and payment automatio

May 13, 2021 EX-99.1

Vertex Announces First Quarter 2021 Financial Results

? Exhibit 99.1 ? Vertex Announces First Quarter 2021 Financial Results KING OF PRUSSIA, PA ? May 13, 2021: Vertex, Inc. (NASDAQ: VERX) (?Vertex? or the ?Company?), a global provider of tax technology solutions, today announced financial results for its first quarter ended March 31, 2021. ?Our strong start to 2021 reflects the trust our customers have in us to help them navigate today?s complex and

May 13, 2021 8-K

Financial Statements and Exhibits, Other Events

8-K 1 verx-20210513x8k.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): May 13, 2021 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorpora

May 13, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

Table of Contents ? ? ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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, 2021 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: 333-239644 VERTEX, INC.

April 8, 2021 SC 13G/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* VERTEX INC (Name of Issuer) (Title of Class of Securities) (CUSIP Number) March 31, 2021 (Date of Event

Schedule 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* VERTEX INC (Name of Issuer) COMMON (Title of Class of Securities) 92538J106 (CUSIP Number) March 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule

April 1, 2021 DEFA14A

- DEFA14A

? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION 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 Statement ? Definitive Additional Materials ? Soliciting Material Pursuant to ?240.

April 1, 2021 DEF 14A

- DEF 14A

Table of Contents ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION 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 Statement ? Definitive Additional Materials ? Soliciting Material Pursuant to ?240.

March 15, 2021 10-K

Annual Report - 10-K

Table of Contents ? ? ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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, 2020 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: 333-239644 VERTEX, INC.

March 15, 2021 EX-4.3

Description of Capital Stock

Exhibit 4.3 ? ? DESCRIPTION OF CAPITAL STOCK ? General ? Our authorized capital stock consists of 450,000,000 shares of common stock, par value $0.001 per share, and 30,000,000 shares of preferred stock, par value $0.001 per share. Our common stock is divided into two classes, Class A common stock and Class B common stock. Our authorized Class A common stock consists of 300,000,000 shares and our

March 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): March 10, 2021 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Co

March 10, 2021 EX-99.1

Vertex Announces Financial Results for Fourth Quarter and Full-Year 2020

Exhibit 99.1 Vertex Announces Financial Results for Fourth Quarter and Full-Year 2020 KING OF PRUSSIA, PA – March 10, 2021: Vertex, Inc. (Nasdaq: VERX) (“Vertex” or the “Company”), a global provider of tax technology solutions, today announced financial results for its fourth quarter and full-year ended December 31, 2020. “Our strong fourth quarter financial results underscore the value we are del

February 16, 2021 SC 13G

SCHEDULE 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Vertex, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 92538J106 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is

February 16, 2021 SC 13G

SCHEDULE 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Vertex, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 92538J106 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is

February 16, 2021 SC 13G

United States Securities and Exchange Commission Washington, D.C. 20549 Schedule 13G (Rule 13d-102) Information to be Included in Statements Filed Pursuant to § 240.13d-1(b), (c) and (d) and Amendments Thereto Filed Pursuant to § 240.13d-2 UNDER THE

United States Securities and Exchange Commission Washington, D.C. 20549 Schedule 13G (Rule 13d-102) Information to be Included in Statements Filed Pursuant to ? 240.13d-1(b), (c) and (d) and Amendments Thereto Filed Pursuant to ? 240.13d-2 UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. )* VERTEX, INC. (Name of Issuer) Class A Common Stock (Title of Class of Securities) 92538J106 (CUSIP N

February 16, 2021 SC 13G/A

SCHEDULE 13G/A INFORMATION TO BE INCLUDED IN STATEMENTS PURSUANT TO RULES 13d- 1(b),(c) AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2 UNDER THE SECURITIES EXCHANGE ACT OF 1934* (Amendment No. 1) Vertex, Inc. (Name of Issuer) Common stock, $0

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A INFORMATION TO BE INCLUDED IN STATEMENTS PURSUANT TO RULES 13d- 1(b),(c) AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2 UNDER THE SECURITIES EXCHANGE ACT OF 1934* (Amendment No. 1) Vertex, Inc. (Name of Issuer) Common stock, $0.001 par value per share (Title of Class of Securities) 92538J106 (CUSIP Numbe

February 16, 2021 SC 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Vertex, Inc. (Name of Issuer) Class A (Title of Class of Securities) (CUSIP Number) December 31, 2020 (Da

Vertex, Inc. UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Vertex, Inc. (Name of Issuer) Class A (Title of Class of Securities) 92538J106 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Sch

February 12, 2021 EX-99

Joint Filing Agreement (previously filed).

Exhibit 99 JOINT FILING AGREEMENT In accordance with Rule 13d-1(k)(1) promulgated under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree that they are jointly filing this statement on Schedule 13G.

February 12, 2021 SC 13G

Securities and Exchange Commission Washington, D.C. 20549 Schedule 13G (Rule 13d-102) Information to be Included in Statements Filed Pursuant to § 240.13d-1(b), (c) and (d) and Amendments Thereto Filed Pursuant to § 240.13d-2 UNDER THE SECURITIES EXC

Securities and Exchange Commission Washington, D.C. 20549 Schedule 13G (Rule 13d-102) Information to be Included in Statements Filed Pursuant to ? 240.13d-1(b), (c) and (d) and Amendments Thereto Filed Pursuant to ? 240.13d-2 UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. )* Vertex, Inc. (Name of Issuer) Class A Common Stock, $0.001 par value per share (Title of Class of Securities) 9253

February 11, 2021 SC 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. n/a )* VERTEX INC (Name of Issuer) (Title of Class of Securities) (CUSIP Number) December 31, 2020 (Date of

Schedule 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. n/a )* VERTEX INC (Name of Issuer) COMMON (Title of Class of Securities) 92538J106 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Sc

February 11, 2021 SC 13G

SCHEDULE 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* VERTEX, INC. (Name of Issuer) Common Stock (Title of Class of Securities) 92538J106 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is

February 11, 2021 SC 13G

SCHEDULE 13G SIGNATURE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. ) VERTEX INC (Name of Issuer) Common Stock (Title of Class of Securities) 92538J106 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is fi

February 10, 2021 SC 13G

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 Name of issuer: Vertex Inc. Title of Class of Securities: Common Stock CUSIP Number: 92538J106 Date of Event Which Requires Filing of this Statement: December 31, 2020 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ Rule 13d-1(b) ☐ Rule 13d-1(

January 19, 2021 SC 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* VERTEX, INC. (Name of Issuer) Class A Common Stock, Par Value $0.001 Per Share (Title of Class of Securit

Schedule 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* VERTEX, INC. (Name of Issuer) Class A Common Stock, Par Value $0.001 Per Share (Title of Class of Securities) 92538J106 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to desi

January 7, 2021 SC 13G/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* VERTEX, INC. (Name of Issuer) (Class A) Class A Common Stock, Par Value $0.001 Per Share (Title of Class

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* VERTEX, INC. (Name of Issuer) (Class A) Class A Common Stock, Par Value $0.001 Per Share (Title of Class of Securities) 92538j106 (CUSIP Number) December 31, 2020 (Date of Event which Requires Filing of this Statement) Check the appropriate box to design

December 9, 2020 SC 13G

VERX / Vertex, Inc. Class A / Conestoga Capital Advisors, LLC - CONESTOGA CAPITAL ADVISORS Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 VERTEX, INC. (Name of Issuer) (Class A) Common Stock, $0.01 Par Value (Title of Class of Securities) 92538j106 (CUSIP Number) December 09, 2020 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Sc

November 13, 2020 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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, 2020 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: 333-239644 VERTEX, INC.

November 10, 2020 EX-99.1

Vertex Announces Third Quarter 2020 Financial Results

? Exhibit 99.1 ? Vertex Announces Third Quarter 2020 Financial Results KING OF PRUSSIA, PA ? November 10, 2020: Vertex, Inc. (Nasdaq: VERX) (?Vertex? or the ?Company?), a leading provider of tax technology and services, today announced financial results for its third quarter ended September 30, 2020. ?Vertex delivered strong third quarter results across many of our key metrics,? said David DeStefa

November 10, 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): November 10, 2020 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization)

September 11, 2020 EX-10.6

Executive Employment Agreement, as amended and restated, by and between Vertex, Inc. and Bryan Rowland.

EXHIBIT 10.6 EXECUTIVE EMPLOYMENT AGREEMENT (as amended and restated) THIS EXECUTIVE EMPLOYMENT AGREEMENT (“Agreement”) is made as of July 14, 2020 by and between VERTEX, INC., a Delaware corporation (“Company”), with offices at 2301 Renaissance Boulevard, King of Prussia, PA 19406, and Bryan T.R. Rowland (“Executive”). Recital WHEREAS, Executive is currently employed by the Company as Vice Presid

September 11, 2020 EX-10.7

Executive Employment Agreement, as amended and restated, by and between Vertex, Inc. and John Schwab.

EXHIBIT 10.7 EXECUTIVE EMPLOYMENT AGREEMENT (as amended and restated) THIS EXECUTIVE EMPLOYMENT AGREEMENT (“Agreement”) is made as of July 18, 2020 by and between VERTEX, INC., a Delaware corporation (“Company”), with offices at 2301 Renaissance Boulevard, King of Prussia, PA 19406, and John R. Schwab (“Executive”). Recital WHEREAS, Executive is currently employed by the Company as Chief Financial

September 11, 2020 EX-10.8

S Corporation Termination and Tax Sharing Agreement.

Exhibit 10.8 S CORPORATION TERMINATION AND TAX SHARING AGREEMENT This S Corporation Termination and Tax Sharing Agreement, dated as of July 27, 2020 (the “Agreement”), is made by and between Vertex, Inc., a Delaware corporation (the “Company”), and the trusts and individuals identified on the signature page hereto (each a “Shareholder” and collectively the “Shareholders”). RECITALS: A. The Company

September 11, 2020 EX-3.1

Amended and Restated Certificate of Incorporation of Vertex, Inc.

Exhibit 3.1 AMENDED AND RESTATED CERTIFICATE OF INCORPORATION OF VERTEX, INC. Vertex, Inc., a corporation organized and existing under the General Corporation Law of the State of Delaware (the “DGCL”), hereby certifies as follows: 1. The name of the corporation is Vertex, Inc. The date of the filing of its original certificate of incorporation with the Secretary of State of the State of Delaware w

September 11, 2020 EX-3.2

Amended and Restated Bylaws of Vertex, Inc.

Exhibit 3.2 Amended and Restated Bylaws of Vertex, Inc. (a Delaware corporation) Table of Contents Page Article I - Corporate Offices 1 1.1 Registered Office 1 1.2 Other Offices 1 Article II - Meetings of Stockholders 1 2.1 Place of Meetings 1 2.2 Annual Meeting 1 2.3 Special Meeting 1 2.4 Notice of Business to be Brought before a Meeting. 2 2.5 Notice of Nominations for Election to the Board of D

September 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 For the transition period from to Commission File Number: 333-239644 VERTEX, INC.

September 11, 2020 EX-10.4

Executive Employment Agreement, as amended and restated, by and between Vertex, Inc. and Lisa Butler.

Exhibit 10.4 EXECUTIVE EMPLOYMENT AGREEMENT (as amended and restated) THIS EXECUTIVE EMPLOYMENT AGREEMENT (“Agreement”) is made as of July 20, 2020 by and between VERTEX, INC., a Delaware corporation (“Company”), with offices at 2301 Renaissance Boulevard, King of Prussia, PA 19406, and Lisa A. Butler (“Executive”). Recital WHEREAS, Executive is currently employed by the Company as Chief Accountin

September 11, 2020 EX-4.2

Third Amended and Restated Stockholders’ Agreement

Exhibit 4.2 THIRD AMENDED AND RESTATED STOCKHOLDERS’ AGREEMENT This Third Amended and Restated Stockholders’ Agreement (this “Agreement”) made as of this 28th day of July, 2020 by, between and among Vertex, Inc., a Delaware corporation (the “Company”) and each Person identified on Schedule 2 hereto and any other Person who becomes a party to this Agreement pursuant to the provisions hereof (each s

September 9, 2020 EX-99.1

Vertex Announces Second Quarter 2020 Financial Results

Exhibit 99.1 Vertex Announces Second Quarter 2020 Financial Results KING OF PRUSSIA, PA – September 9, 2020: Vertex, Inc. (Nasdaq: VERX) (“Vertex” or the “Company”), a leading provider of tax technology and services, today announced financial results for its second quarter ended June 30, 2020. “We are pleased with our strong second quarter performance, driven by revenue growth of 16.5% and ARR gro

September 9, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 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): September 9, 2020 VERTEX, INC. (Exact name of registrant as specified in its charter) Delaware 001-39413 23-2081753 (State or other jurisdiction of incorporation or organization) (Com

August 10, 2020 SC 13G

VERX / Vertex, Inc. Class A / VIKING GLOBAL INVESTORS LP - ACQUISITION OF BENEFICIAL OWNERSHIP Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G INFORMATION TO BE INCLUDED IN STATEMENTS PURSUANT TO RULES 13d-1(b),(c) AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2 UNDER THE SECURITIES EXCHANGE ACT OF 1934* Vertex, Inc. (Name of Issuer) Common stock, $0.001 par value per share (Title of Class of Securities) 92538J106 (CUSIP Number) July 29, 2020 (Dat

July 30, 2020 424B4

21,150,000 Shares VERTEX, INC. Class A Common Stock

Use these links to rapidly review the document TABLE OF CONTENTS INDEX TO CONSOLIDATED FINANCIAL STATEMENTS Filed Pursuant to Rule 424(b)(4) Registration No.

July 29, 2020 8-A12B

- 8-A12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934 Vertex, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 23-2081753 (I.R.S. Employer Identification No.) 2301 Rena

July 28, 2020 S-8

Form S-8

As filed with the United States Securities and Exchange Commission on July 28, 2020 Registration No.

July 28, 2020 S-1/A

Form S-1, as amended (File No. 333-239644)

Use these links to rapidly review the document TABLE OF CONTENTS INDEX TO CONSOLIDATED FINANCIAL STATEMENTS As filed with the Securities and Exchange Commission on July 28, 2020.

July 27, 2020 CORRESP

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555 Eleventh Street, N.W., Suite 1000 Washington, D.C. 20004-1304 Tel: +1.202.637.2200 Fax: +1.202.637.2201 www.lw.com FIRM / AFFILIATE OFFICES Beijing Moscow Boston Munich Brussels New York Century City Orange County Chicago Paris July 27, 2020 Dubai Riyadh Düsseldorf San Diego Frankfurt San Francisco VIA EDGAR Hamburg Seoul Hong Kong Shanghai Houston Silicon Valley London Singapore Los Angeles T

July 27, 2020 CORRESP

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July 27, 2020 VIA EDGAR TRANSMISSION U.S. Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.E. Washington, DC 20549-6010 Attention: Michael C. Foland, Attorney-Advisor Kathleen Krebs, Special Counsel Becky Chow, Staff Accountant Melissa Walsh, Staff Accountant Re: Vertex, Inc. Registration Statement on Form S-1 Filed July 2, 2020 Registration No. 333-239644 Request

July 27, 2020 CORRESP

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July 27, 2020 VIA EDGAR AND EMAIL Securities and Exchange Commission Division of Corporation Finance 100 F Street NE Washington, D.

July 27, 2020 COVER

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Vertex, Inc Amendment No. 1 to Registration Statement on Form S-1 File No. 333-239644 Response to SEC Comment Letter, Question 2, Exhibit A As of March 31, 2020 Pro Forma Pro Forma as adjusted (Unaudited) (amounts in thousands, except per share data) Tangible Net Book Value per Share: Total Net Book Value per Capitalization Table $ (295,590 ) $ (7,153 ) Less: Intangible Assets (Goodwill) 20,231 20

July 24, 2020 EX-1.1

Form of Underwriting Agreement.

Exhibit 1.1 Vertex, Inc. Class A Common Stock, par value $0.001 per share Underwriting Agreement [·], 2020 Goldman Sachs & Co. LLC Morgan Stanley & Co. LLC As representatives (the “Representatives”) of the several Underwriters named in Schedule I hereto, c/o Goldman Sachs & Co. LLC, 200 West Street, New York, New York 10282-2198. c/o Morgan Stanley & Co. LLC, 1585 Broadway, New York, New York 1003

July 24, 2020 EX-4.1

Specimen Stock Certificate evidencing the shares of Class A common stock.

Exhibit 4.1 INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE SEE REVERSE SIDE FOR CERTAIN DEFINITIONS THIS CERTIFIES THAT is the owner of FULLY PAID AND NON-ASSESSABLE CLASS A COMMON STOCK, $0.001 PAR VALUE, OF VERTEX, INC. transferable on the books of the Corporation byCthe hOolder Mhereof iMn persoOn or bNy Attorney upon surrender of this certificate properly endorsed. This certificate is no

July 24, 2020 EX-4.2

Form of Third Amended and Restated Stockholders' Agreement.

Exhibit 4.2 THIRD AMENDED AND RESTATED STOCKHOLDERS’ AGREEMENT This Third Amended and Restated Stockholders’ Agreement (this “Agreement”) made as of this [ · ] day of [ · ], 2020 by, between and among Vertex, Inc., a Delaware corporation (the “Company”) and each Person identified on Schedule 2 hereto and any other Person who becomes a party to this Agreement pursuant to the provisions hereof (each

July 24, 2020 S-1/A

Powers of Attorney (included on the signature pages).

QuickLinks - Click here to rapidly navigate through this document As filed with the Securities and Exchange Commission on July 24, 2020.

July 24, 2020 EX-10.15

Vertex, Inc. 2020 Incentive Award Plan

EXHIBIT 10.15 VERTEX, INC. 2020 INCENTIVE AWARD PLAN ARTICLE I. PURPOSE The Plan’s purpose is to enhance the Company’s ability to attract, retain and motivate persons who make (or are expected to make) important contributions to the Company by providing these individuals with equity ownership opportunities. Capitalized terms used in the Plan are defined in Article XI. ARTICLE II. ELIGIBILITY Servi

July 24, 2020 EX-3.1

Form of Amended and Restated Certificate of Incorporation of Vertex, Inc.

Exhibit 3.1 AMENDED AND RESTATED CERTIFICATE OF INCORPORATION OF VERTEX, INC. Vertex, Inc., a corporation organized and existing under the General Corporation Law of the State of Delaware (the “DGCL”), hereby certifies as follows: 1. The name of the corporation is Vertex, Inc. The date of the filing of its original certificate of incorporation with the Secretary of State of the State of Delaware w

July 20, 2020 EX-10.10

Vertex Inc. & Subsidiaries 2010 Long-Term Rewards Plan

Exhibit 10.10 VERTEX INC. & SUBSIDIARIES 2010 LONG-TERM REWARDS PLAN [As Amended and Restated November 29, 2011] For Performance Periods Beginning on and after January 1, 2010 I. Introduction This 2010 Long-Term Rewards Plan (the “Plan” or “LTRP”) is effective for awards made under it solely for performance periods beginning on and after January 1, 2010. The Company’s Long-Term Incentive Plan adop

July 20, 2020 S-1/A

- S-1/A

Use these links to rapidly review the document TABLE OF CONTENTS INDEX TO CONSOLIDATED FINANCIAL STATEMENTS As filed with the Securities and Exchange Commission on July 20, 2020.

July 20, 2020 EX-21.1

List of Subsidiaries

Exhibit 21.1 Legal Name Jurisdiction of Incorporation Systax Sistemas Fiscais Ltda. Brazil Vertex Acquisition, Inc. Delaware Vertex Delaware, LLC Delaware Vertex Germany GmbH Germany Vertex Global Tax Solutions Ireland Ireland Vertex Global Tax Solutions, Ltd. United Kingdom Vertex LLC Delaware Vertex Netherlands BV Netherlands Vertex Tax Solutions India Private Limited India Vertex VAT Solutions,

July 20, 2020 EX-10.6

Executive Employment Agreement, as amended and restated, by and between Vertex, Inc. and David DeStefano.

EXHIBIT 10.6 EXECUTIVE EMPLOYMENT AGREEMENT (as amended and restated) THIS EXECUTIVE EMPLOYMENT AGREEMENT (“Agreement”) is made as of July 6, 2020 by and between VERTEX, INC., a Delaware corporation (“Company”), with offices at 2301 Renaissance Boulevard, King of Prussia, PA 19406, and David J. DeStefano (“Executive”). Recital WHEREAS, Executive is currently employed by the Company as President an

July 20, 2020 EX-3.2

Form of Amended and Restated Bylaws of Vertex, Inc.

EXHIBIT 3.2 Amended and Restated Bylaws of Vertex, Inc. (a Delaware corporation) Table of Contents Page Article I - Corporate Offices 1 1.1 Registered Office 1 1.2 Other Offices 1 Article II - Meetings of Stockholders 1 2.1 Place of Meetings 1 2.2 Annual Meeting 1 2.3 Special Meeting 1 2.4 Notice of Business to be Brought before a Meeting 2 2.5 Notice of Nominations for Election to the Board of Di

July 20, 2020 EX-10.17

Form of Restricted Stock Award Agreement under 2020 Incentive Award Plan

Exhibit 10.17 VERTEX, INC. 2020 INCENTIVE AWARD PLAN RESTRICTED STOCK GRANT NOTICE Capitalized terms not specifically defined in this Restricted Stock Grant Notice (the “Grant Notice”) have the meanings given to them in the 2020 Incentive Award Plan (as amended from time to time, the “Plan”) of Vertex, Inc. (the “Company”). The Company has granted to the participant listed below (“Participant”) th

July 20, 2020 EX-10.13

Form of Option Award Agreement under 2020 Incentive Award Plan for Amended Options

Exhibit 10.13 VERTEX, INC. 2020 INCENTIVE AWARD PLAN STOCK OPTION GRANT NOTICE (OPTION AMENDMENT) Capitalized terms not specifically defined in this Stock Option Grant Notice (the “Grant Notice”) have the meanings given to them in the 2020 Incentive Award Plan (as amended from time to time, the “Plan”) of Vertex, Inc. (the “Company”). The Company has granted to the participant listed below (“Parti

July 20, 2020 EX-10.5

Form of Executive Employment Agreement, as amended and restated, by and between Vertex, Inc. and Lisa Butler.

EXHIBIT 10.5 EXECUTIVE EMPLOYMENT AGREEMENT (as amended and restated) THIS EXECUTIVE EMPLOYMENT AGREEMENT (“Agreement”) is made as of , 2020 by and between VERTEX, INC., a Delaware corporation (“Company”), with offices at 2301 Renaissance Boulevard, King of Prussia, PA 19406, and Lisa A. Butler (“Executive”). Recital WHEREAS, Executive is currently employed by the Company as Chief Accounting Offic

July 20, 2020 EX-10.9

Form of S Corporation Termination and Tax Sharing Agreement.

EXHIBIT 10.9 S CORPORATION TERMINATION AND TAX SHARING AGREEMENT This S Corporation Termination and Tax Sharing Agreement, dated as of [ ], 2020 (the “Agreement”), is made by and between Vertex, Inc., a Delaware corporation (the “Company”), and the trusts and individuals identified on the signature page hereto (each a “Shareholder” and collectively the “Shareholders”). RECITALS: A. The Company has

July 20, 2020 EX-10.3

Form of Indemnification Agreement between Vertex, Inc. and each of its Executive Officers and Directors.

EXHIBIT 10.3 INDEMNIFICATION AND ADVANCEMENT AGREEMENT This Indemnification and Advancement Agreement (“Agreement”) is made as of , 2020 by and between Vertex, Inc. a Delaware corporation (the “Company”), and , [a member of the Board of Directors/an officer/an employee/an agent/a fiduciary] of the Company (“Indemnitee”). This Agreement supersedes and replaces any and all previous Agreements betwee

July 20, 2020 EX-10.18

Form of Restricted Stock Unit Award Agreement under 2020 Incentive Award Plan

Exhibit 10.18 VERTEX, INC. 2020 INCENTIVE AWARD PLAN RESTRICTED STOCK UNIT GRANT NOTICE Capitalized terms not specifically defined in this Restricted Stock Unit Grant Notice (the “Grant Notice”) have the meanings given to them in the 2020 Incentive Award Plan (as amended from time to time, the “Plan”) of Vertex, Inc. (the “Company”). The Company has granted to the participant listed below (“Partic

July 20, 2020 EX-10.14

Form of Option Award Agreement under 2020 Incentive Award Plan for Amended Stock Appreciation Rights

Exhibit 10.14 VERTEX, INC. 2020 INCENTIVE AWARD PLAN STOCK OPTION GRANT NOTICE (SAR AMENDMENT) Capitalized terms not specifically defined in this Stock Option Grant Notice (the “Grant Notice”) have the meanings given to them in the 2020 Incentive Award Plan (as amended from time to time, the “Plan”) of Vertex, Inc. (the “Company”). The Company has granted to the participant listed below (“Particip

July 20, 2020 EX-10.12

Form of Stock Option Amendment Agreement

Exhibit 10.12 STOCK OPTION AMENDMENT AGREEMENT This STOCK OPTION AMENDMENT AGREEMENT (this “Agreement”), dated as of , 2020, is among Vertex, Inc. (the “Company”) and [INSERT NAME OF OPTIONHOLDER] (the “Optionee”). RECITALS WHEREAS, in connection with the consummation of the initial public offering of the Company’s Class A common stock pursuant to an effective registration statement filed under th

July 20, 2020 EX-10.11

Vertex Inc. & Subsidiaries 2018 Long-Term Rewards Plan

Exhibit 10.11 VERTEX INC. & SUBSIDIARIES 2018 LONG-TERM REWARDS PLAN For Performance Periods Beginning on and after January 1, 2018 I. Introduction This 2018 Long-Term Rewards Plan (the “Plan” or “LTRP”) is effective for awards made under it solely for performance periods beginning on and after January 1, 2018. The Company’s Long-Term Incentive Plan adopted in 2010 will continue to govern awards m

July 20, 2020 EX-10.19

Form of Stock Award Agreement under 2020 Incentive Award Plan

Exhibit 10.19 VERTEX, INC. 2020 INCENTIVE AWARD PLAN STOCK GRANT NOTICE Capitalized terms not specifically defined in this Stock Grant Notice (the “Grant Notice”) have the meanings given to them in the 2020 Incentive Award Plan (as amended from time to time, the “Plan”) of Vertex, Inc. (the “Company”). The Company has granted to the participant listed below (“Participant”) the shares of Common Sto

July 20, 2020 EX-10.20

Form of Option Transfer Agreement

Exhibit 10.20 VERTEX, INC. STOCK OPTION TRANSFER AGREEMENT This Stock Option Transfer Agreement (this “Agreement”) is entered into by and among Vertex, Inc., a Delaware corporation (the “Company”), [ ] (the “Transferor”) and [ ] (the “Transferee”). The Company, the Transferor and the Transferee are each sometimes referred to herein as a “Party,” and collectively sometimes referred to herein as the

July 20, 2020 EX-10.8

Form of Executive Employment Agreement, as amended and restated, by and between Vertex, Inc. and John Schwab.

EXHIBIT 10.8 EXECUTIVE EMPLOYMENT AGREEMENT (as amended and restated) THIS EXECUTIVE EMPLOYMENT AGREEMENT (“Agreement”) is made as of July , 2020 by and between VERTEX, INC., a Delaware corporation (“Company”), with offices at 2301 Renaissance Boulevard, King of Prussia, PA 19406, and John R. Schwab (“Executive”). Recital WHEREAS, Executive is currently employed by the Company as Chief Financial O

July 20, 2020 EX-3.1

Form of Amended and Restated Certificate of Incorporation of Vertex, Inc.

Exhibit 3.1 AMENDED AND RESTATED CERTIFICATE OF INCORPORATION OF VERTEX, INC. Vertex, Inc., a corporation organized and existing under the General Corporation Law of the State of Delaware (the “DGCL”), hereby certifies as follows: 1. The name of the corporation is Vertex, Inc. The date of the filing of its original certificate of incorporation with the Secretary of State of the State of Delaware w

July 20, 2020 EX-10.21

Vertex, Inc. 2020 Employee Stock Purchase Plan

Exhibit 10.21 VERTEX, INC. 2020 EMPLOYEE STOCK PURCHASE PLAN ARTICLE I. PURPOSE The purpose of this Plan is to assist Eligible Employees of the Company and its Designated Subsidiaries in acquiring a stock ownership interest in the Company. The Plan consists of two components: (i) the Section 423 Component and (ii) the Non-Section 423 Component. The Section 423 Component is intended to qualify as a

July 20, 2020 EX-10.15

Vertex, Inc. 2020 Incentive Award Plan

EXHIBIT 10.15 VERTEX, INC. 2020 INCENTIVE AWARD PLAN ARTICLE I. PURPOSE The Plan’s purpose is to enhance the Company’s ability to attract, retain and motivate persons who make (or are expected to make) important contributions to the Company by providing these individuals with equity ownership opportunities. Capitalized terms used in the Plan are defined in Article XI. ARTICLE II. ELIGIBILITY Servi

July 20, 2020 EX-10.7

Form of Executive Employment Agreement, as amended and restated, by and between Vertex, Inc. and Bryan Rowland.

EXHIBIT 10.7 EXECUTIVE EMPLOYMENT AGREEMENT (as amended and restated) THIS EXECUTIVE EMPLOYMENT AGREEMENT (“Agreement”) is made as of July , 2020 by and between VERTEX, INC., a Delaware corporation (“Company”), with offices at 2301 Renaissance Boulevard, King of Prussia, PA 19406, and Bryan T.R. Rowland (“Executive”). Recital WHEREAS, Executive is currently employed by the Company as Vice Presiden

July 20, 2020 EX-10.22

Vertex, Inc. Non-Employee Director Compensation Program

Exhibit 10.22 VERTEX, INC. NON-EMPLOYEE DIRECTOR COMPENSATION PROGRAM Non-employee members of the board of directors (the “Board”) of Vertex, Inc. (the “Company”) shall receive cash and equity compensation as set forth in this Non-Employee Director Compensation Program (this “Program”). The cash and equity compensation described in this Program shall be paid or be made, as applicable, automaticall

July 20, 2020 EX-10.16

Form of Option Award Agreement under 2020 Incentive Award Plan

Exhibit 10.16 VERTEX, INC. 2020 INCENTIVE AWARD PLAN STOCK OPTION GRANT NOTICE Capitalized terms not specifically defined in this Stock Option Grant Notice (the “Grant Notice”) have the meanings given to them in the 2020 Incentive Award Plan (as amended from time to time, the “Plan”) of Vertex, Inc. (the “Company”). The Company has granted to the participant listed below (“Participant”) the stock

July 2, 2020 EX-10.2

First Amendment to Loan Documents, by and among Vertex, Inc., the guarantors party thereto, the lenders party thereto and PNC Bank, National Association, dated as of April 3, 2020.

EX-10.2 3 a2241987zex-102.htm EX-10.2 Exhibit 10.2 FIRST AMENDMENT TO LOAN DOCUMENTS FIRST AMENDMENT TO LOAN DOCUMENTS (this “Amendment”), dated as of April 3, 2020, by and among (i) VERTEX, INC. (the “Borrower”), (ii) VERTEX VAT SOLUTIONS, LLC and VERTEX DELAWARE, LLC (collectively, the “Guarantors”; together with the Borrower, individually a “Loan Party” and collectively, the “Loan Parties”), (i

July 2, 2020 EX-10.1

Credit Agreement by and among Vertex, Inc., the guarantors party thereto, PNC Bank, National Association, and the lenders party thereto, dated as of March 31, 2020.

EXHIBIT 10.1 $100,000,000 REVOLVING CREDIT FACILITY $175,000,000 TERM LOAN CREDIT AGREEMENT by and among VERTEX, INC., as Borrower and THE GUARANTORS PARTY HERETO and THE LENDERS PARTY HERETO and PNC BANK, NATIONAL ASSOCIATION, as Administrative Agent Dated as of March 31, 2020 PNC CAPITAL MARKETS LLC, as Sole Lead Arranger and Sole Bookrunner TABLE OF CONTENTS Page 1. CERTAIN DEFINITIONS 1 1.1 Ce

July 2, 2020 EX-16.1

Letter of Baker Tilly Virchow Krause, LLP to the Securities and Exchange Commission.

EX-16.1 5 a2241987zex-161.htm EX-16.1 Exhibit 16.1 May 12, 2020 Securities and Exchange Commission 100 F Street, N.E. Washington, DC 20549 Ladies and Gentlemen: We have read the disclosure set forth under the caption “Change in Independent Accountant” in the Registration Statement on Form S-1 of Vertex, Inc. dated May 12, 2020 and are in agreement with the statements contained therein insofar as t

July 2, 2020 CORRESP

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555 Eleventh Street, N.W., Suite 1000 Washington, D.C. 20004-1304 Tel: +1.202.637.2200 Fax: +1.202.637.2201 www.lw.com FIRM / AFFILIATE OFFICES Beijing Moscow Boston Munich Brussels New York Century City Orange County July 2, 2020 Chicago Paris Dubai Riyadh Düsseldorf San Diego Frankfurt San Francisco VIA EDGAR Hamburg Seoul Hong Kong Shanghai Houston Silicon Valley London Singapore Los Angeles To

July 2, 2020 EX-10.4

2007 Stock Appreciation Plan

Exhibit 10.4 VERTEX, INC. THIRD AMENDED AND RESTATED 2007 STOCK APPRECIATION RIGHTS PLAN SECTION 1 AMENDMENT AND RESTATEMENT AND PURPOSE Vertex, Inc., a Pennsylvania corporation (the “Company”), hereby amends and restates in its entirety the SECOND AMENDED AND RESTATED VERTEX, INC. 2007 STOCK APPRECIATION RIGHTS PLAN (the “Plan”), effective as of May 4, 2017. The purpose of the Plan is to promote

July 2, 2020 S-1

Powers of Attorney (included on the signature pages).

As filed with the Securities and Exchange Commission on July 2, 2020. Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 VERTEX, INC. (Exact name of registrant as specified in its charter) Pennsylvania 7372 23-2081753 (State or other jurisdiction of incorporation or organization) (Primary St

June 18, 2020 DRS/A

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As confidentially submitted to the Securities and Exchange Commission on June 18, 2020.

June 18, 2020 DRSLTR

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555 Eleventh Street, N.W., Suite 1000 Washington, D.C. 20004-1304 Tel: +1.202.637.2200 Fax: +1.202.637.2201 www.lw.com FIRM / AFFILIATE OFFICES Beijing Moscow Boston Munich Brussels New York Century City Orange County Chicago Paris June 18, 2020 Dubai Riyadh Düsseldorf San Diego Frankfurt San Francisco Hamburg Seoul VIA EDGAR Hong Kong Shanghai Houston Silicon Valley London Singapore Los Angeles T

May 13, 2020 EX-16.1

May 12, 2020

Exhibit 16.1 May 12, 2020 Securities and Exchange Commission 100 F Street, N.E. Washington, DC 20549 Ladies and Gentlemen: We have read the disclosure set forth under the caption “Change in Independent Accountant” in the Registration Statement on Form S-1 of Vertex, Inc. dated May 12, 2020 and are in agreement with the statements contained therein insofar as they relate to our Firm. We have no bas

May 13, 2020 DRS/A

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As confidentially submitted to the Securities and Exchange Commission on May 12, 2020.

May 12, 2020 DRSLTR

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555 Eleventh Street, N.W., Suite 1000 Washington, D.C. 20004-1304 Tel: +1.202.637.2200 Fax: +1.202.637.2201 www.lw.com FIRM / AFFILIATE OFFICES Beijing Moscow Boston Munich Brussels New York Century City Orange County Chicago Paris Dubai Riyadh May 12, 2020 Düsseldorf San Diego Frankfurt San Francisco Hamburg Seoul VIA EDGAR AND HAND DELIVERY Hong Kong Shanghai Houston Silicon Valley London Singap

March 30, 2020 DRS

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As confidentially submitted to the Securities and Exchange Commission on March 27, 2020.

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