Gossamer Bio, Inc.
DE ˙ DB ˙ US38341P1021
0,17 € ↓ -0,02 (-12,60%)
2026-06-02
PREZZO DELLE AZIONI
SecurityDE:4GB / Gossamer Bio, Inc.
InstitutionBlackRock, Inc.
Latest Disclosed Ownership15,065,708 shares
Ownership 6.50%
BlackRock, Inc. ownership in 4GB / Gossamer Bio, Inc.

2026-01-21 - BlackRock, Inc. has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 15,065,708 shares of Gossamer Bio, Inc. (DE:4GB). This represents 6.5 percent ownership of the company. In their previous filing dated 2025-07-17 , BlackRock, Inc. had reported owning 12,135,339 shares, indicating an increase of 24.15 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File
Date		Effective
Date		Form Prev
Shares		 Latest
Shares		 ΔShares
(Percent)		 Ownership
(Percent)		 ΔOwnership
(Percent)
2026-01-21 2026-01-21 13G/A 12,135,339 15,065,708 24.15 6.50 22.64
2025-07-17 2025-07-17 13G 4,653,619 12,135,339 160.77 5.30 8.16
2023-05-05 2023-05-05 13G/A 5,413,023 4,653,619 -14.03 4.90 -14.04
2023-02-01 2023-02-01 13G/A 5,429,686 5,413,023 -0.31 5.70 -19.72
2022-02-03 2022-02-03 13G/A 4,702,035 5,429,686 15.48 7.10 14.52
2021-02-02 2021-02-02 13G 3,739,127 4,702,035 25.75 6.20 26.53
2020-06-09 2020-06-09 13G/A 3,546,520 3,739,127 5.43 4.90 -9.26
2020-02-07 2020-02-07 13G 3,546,520 5.40

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-13 2026-03-31 13F GOSSAMER BIO COM 38341P102 16,826,695 -230,183 -1.35 5,528 -89.55 0.0001
2026-02-12 2025-12-31 13F GOSSAMER BIO COM 38341P102 17,056,878 3,210,824 23.19 52,876 45.20 0.0009
2025-11-12 2025-09-30 13F GOSSAMER BIO COM 38341P102 13,846,054 1,703,458 14.03 36,415 143.82 0.0006
2025-08-12 2025-06-30 13F GOSSAMER BIO COM 38341P102 12,142,596 9,069,823 295.17 14,935 341.86 0.0003
2025-05-02 2025-03-31 13F GOSSAMER BIO COM 38341P102 3,072,773 43,564 1.44 3,380 23.36 0.0001
2025-02-07 2024-12-31 13F GOSSAMER BIO COM 38341P102 3,029,209 223,567 7.97 2,740 -0.98 0.0001
2024-11-13 2024-09-30 13F GOSSAMER BIO COM 38341P102 2,805,642 -5,865 -0.21 2,767 9.28 0.0001
2024-08-13 2024-06-30 13F GOSSAMER BIO COM 38341P102 2,811,507 -277,819 -8.99 2,533 -30.53 0.0001
2024-05-10 2024-03-31 13F GOSSAMER BIO COM 38341P102 3,089,326 -289,320 -8.56 3,645 18.23 0.0001
2024-02-13 2023-12-31 13F GOSSAMER BIO COM 38341P102 3,378,646 -1,088,007 -24.36 3,083 -17.10 0.0001
2023-11-13 2023-09-30 13F GOSSAMER BIO COM 38341P102 4,466,653 2,554,648 133.61 3,720 62.12 0.0001
2023-08-11 2023-06-30 13F GOSSAMER BIO COM 38341P102 1,912,005 -2,881,674 -60.11 2,294 -62.02 0.0001
2023-05-12 2023-03-31 13F GOSSAMER BIO COM 38341P102 4,793,679 -619,344 -11.44 6,040 -48.58 0.0002
2023-02-13 2022-12-31 13F GOSSAMER BIO COM 38341P102 5,413,023 -95,154 -1.73 11,746 -82.20 0.0004
2022-11-14 2022-09-30 13F GOSSAMER BIO COM 38341P102 5,508,177 342,213 6.62 65,988 52.61 0.0022
2022-08-12 2022-06-30 13F GOSSAMER BIO COM 38341P102 5,165,964 -163,167 -3.06 43,240 -6.52 0.0014
2022-05-12 2022-03-31 13F GOSSAMER BIO COM 38341P102 5,329,131 -100,555 -1.85 46,258 -24.67 0.0012
2022-02-10 2021-12-31 13F GOSSAMER BIO COM 38341P102 5,429,686 66,816 1.25 61,409 -8.90 0.0016
2021-11-09 2021-09-30 13F GOSSAMER BIO COM 38341P102 5,362,870 -52,935 -0.98 67,410 53.29 0.0019
2021-08-11 2021-06-30 13F GOSSAMER BIO COM 38341P102 5,415,805 50,456 0.94 43,976 -11.39 0.0012
2021-05-07 2021-03-31 13F GOSSAMER BIO COM 38341P102 5,365,349 663,314 14.11 49,630 9.15 0.0015
2021-02-05 2020-12-31 13F GOSSAMER BIO COM 38341P102 4,702,035 62,411 1.35 45,469 -21.03 0.0015
2020-11-06 2020-09-30 13F GOSSAMER BIO COM 38341P102 4,639,624 344,508 8.02 57,578 3.12 0.0021
2020-08-14 2020-06-30 13F GOSSAMER BIO COM 38341P102 4,295,116 788,180 22.47 55,836 56.86 0.0022
2020-05-01 2020-03-31 13F GOSSAMER BIO COM 38341P102 3,506,936 -39,584 -1.12 35,597 -35.78 0.0017
2020-02-13 2019-12-31 13F GOSSAMER BIO COM 38341P102 3,546,520 743,721 26.53 55,432 17.79 0.0021
2019-11-08 2019-09-30 13F GOSSAMER BIO COM 38341P102 2,802,799 1,507,575 116.39 47,060 63.81 0.0020
2019-08-22 2019-06-30 13F/A-1 GOSSAMER BIO COM 38341P102 1,295,224 500,944 63.07 28,729 66.91 0.0012
2019-08-13 2019-06-30 13F GOSSAMER BIO COM 38341P102 1,295,224 500,944 28,729
2019-05-09 2019-03-31 13F GOSSAMER BIO COM 38341P102 794,280 794,280 17,212 0.0008
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.