Gossamer Bio, Inc.
DE ˙ DB ˙ US38341P1021
0,17 € ↑0,02 (10,16%)
2026-06-05
DEL PRIS
SecurityDE:4GB / Gossamer Bio, Inc.
InstitutionTwo Sigma Advisers, Lp
Latest Disclosed Ownership2,596,900 shares
Latest Disclosed Value $ 8,050,390
Two Sigma Advisers, Lp reports 38.86% increase in ownership of 4GB / Gossamer Bio, Inc.

On February 17, 2026 - Two Sigma Advisers, Lp filed a 13F-HR form disclosing ownership of 2,596,900 shares of Gossamer Bio, Inc. (DE:4GB) valued at $6,803,878 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 14, 2025 disclosing 1,870,100 shares of Gossamer Bio, Inc.. This represents a change in shares of 38.86% during the quarter. The current value of the position is $436,279 USD.

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)
2026-02-17 2025-12-31 13F GOSSAMER BIO COM 38341P102 2,596,900 726,800 38.86 8,050 63.68 0.0157
2025-11-14 2025-09-30 13F GOSSAMER BIO COM 38341P102 1,870,100 197,900 11.83 4,918 139.20 0.0098
2025-08-14 2025-06-30 13F GOSSAMER BIO COM 38341P102 1,672,200 385,000 29.91 2,057 45.30 0.0042
2025-05-15 2025-03-31 13F GOSSAMER BIO COM 38341P102 1,287,200 129,700 11.21 1,416 35.15 0.0032
2025-02-14 2024-12-31 13F GOSSAMER BIO COM 38341P102 1,157,500 357,500 44.69 1,047 32.70 0.0024
2024-11-14 2024-09-30 13F GOSSAMER BIO COM 38341P102 800,000 -23,900 -2.90 789 6.33 0.0018
2024-08-14 2024-06-30 13F GOSSAMER BIO COM 38341P102 823,900 -336,800 -29.02 742 -45.80 0.0017
2024-05-15 2024-03-31 13F GOSSAMER BIO COM 38341P102 1,160,700 59,900 5.44 1,370 36.35 0.0032
2024-02-14 2023-12-31 13F GOSSAMER BIO COM 38341P102 1,100,800 47,400 4.50 1,004 14.48 0.0024
2023-11-14 2023-09-30 13F GOSSAMER BIO COM 38341P102 1,053,400 -649,500 -38.14 877 -57.07 0.0022
2023-08-14 2023-06-30 13F GOSSAMER BIO COM 38341P102 1,702,900 -137,500 -7.47 2,043 -11.86 0.0052
2023-05-15 2023-03-31 13F GOSSAMER BIO COM 38341P102 1,840,400 15,700 0.86 2,319 -41.45 0.0060
2023-02-14 2022-12-31 13F GOSSAMER BIO COM 38341P102 1,824,700 957,000 110.29 3,960 -61.91 0.0111
2022-11-14 2022-09-30 13F GOSSAMER BIO COM 38341P102 867,700 562,600 184.40 10,395 307.01 0.0301
2022-08-15 2022-06-30 13F GOSSAMER BIO COM 38341P102 305,100 7,300 2.45 2,554 -1.20 0.0072
2022-05-16 2022-03-31 13F GOSSAMER BIO COM 38341P102 297,800 32,600 12.29 2,585 -13.80 0.0069
2022-02-14 2021-12-31 13F GOSSAMER BIO COM 38341P102 265,200 61,600 30.26 2,999 17.19 0.0075
2021-11-15 2021-09-30 13F GOSSAMER BIO COM 38341P102 203,600 -155,100 -43.24 2,559 -12.15 0.0066
2021-08-16 2021-06-30 13F GOSSAMER BIO COM 38341P102 358,700 -131,500 -26.83 2,913 -35.75 0.0077
2021-05-17 2021-03-31 13F GOSSAMER BIO COM 38341P102 490,200 289,400 144.12 4,534 133.47 0.0125
2021-02-16 2020-12-31 13F GOSSAMER BIO COM 38341P102 200,800 50,100 33.24 1,942 3.85 0.0052
2020-11-16 2020-09-30 13F GOSSAMER BIO COM 38341P102 150,700 97,000 180.63 1,870 167.91 0.0053
2020-09-15 2020-06-30 13F/A-1 GOSSAMER BIO COM 38341P102 53,700 53,700 698 0.0021
2020-08-14 2020-06-30 13F GOSSAMER BIO COM 38341P102 53,700 698 0.0020
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.