Gossamer Bio, Inc.
DE ˙ DB ˙ US38341P1021
0,15 € ↓ -0,02 (-9,23%)
2026-06-04
DEL PRIS
SecurityDE:4GB / Gossamer Bio, Inc.
InstitutionProShare Advisors LLC
Latest Disclosed Ownership38,206 shares
Latest Disclosed Value $ 12,551
ProShare Advisors LLC reports 15.73% decrease in ownership of 4GB / Gossamer Bio, Inc.

On April 24, 2026 - ProShare Advisors LLC filed a 13F-HR form disclosing ownership of 38,206 shares of Gossamer Bio, Inc. (DE:4GB) valued at $10,499 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 45,338 shares of Gossamer Bio, Inc.. This represents a change in shares of -15.73% during the quarter. The current value of the position is $5,826 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-04-24 2026-03-31 13F GOSSAMER BIO COM 38341P102 38,206 -7,132 -15.73 13 -91.43 0.0000
2026-02-06 2025-12-31 13F GOSSAMER BIO COM 38341P102 45,338 12,863 39.61 141 64.71 0.0002
2025-11-06 2025-09-30 13F GOSSAMER BIO COM 38341P102 32,475 -6,471 -16.62 85 80.85 0.0002
2025-08-07 2025-06-30 13F GOSSAMER BIO COM 38341P102 38,946 38,946 48 0.0001
2024-02-14 2023-12-31 13F GOSSAMER BIO COM 38341P102 0 -14,730 -100.00 0 -100.00
2023-11-13 2023-09-30 13F GOSSAMER BIO COM 38341P102 14,730 14,730 12 0.0000
2023-08-10 2023-06-30 13F GOSSAMER BIO COM 38341P102 0 -13,963 -100.00 0 -100.00
2023-05-26 2023-03-31 13F/A-1 GOSSAMER BIO COM 38341P102 13,963 -1,955 -12.28 18 -50.00 0.0001
2023-05-12 2023-03-31 13F GOSSAMER BIO COM 38341P102 13,963 -1,955 18 0.0001
2023-02-02 2022-12-31 13F GOSSAMER BIO COM 38341P102 15,918 1,072 7.22 35 -80.90 0.0001
2022-11-07 2022-09-30 13F GOSSAMER BIO COM 38341P102 14,846 1,766 13.50 178 61.82 0.0007
2022-08-01 2022-06-30 13F GOSSAMER BIO COM 38341P102 13,080 -6,491 -33.17 110 -35.29 0.0004
2022-05-10 2022-03-31 13F GOSSAMER BIO COM 38341P102 19,571 -4,785 -19.65 170 -38.41 0.0004
2022-02-08 2021-12-31 13F GOSSAMER BIO COM 38341P102 24,356 157 0.65 276 -9.21 0.0005
2021-11-12 2021-09-30 13F GOSSAMER BIO COM 38341P102 24,199 -5,572 -18.72 304 25.62 0.0009
2021-08-13 2021-06-30 13F GOSSAMER BIO COM 38341P102 29,771 4,175 16.31 242 2.11 0.0007
2021-05-14 2021-03-31 13F GOSSAMER BIO COM 38341P102 25,596 1,322 5.45 237 0.85 0.0007
2021-02-09 2020-12-31 13F GOSSAMER BIO COM 38341P102 24,274 5,109 26.66 235 -1.26 0.0009
2020-11-13 2020-09-30 13F GOSSAMER BIO COM 38341P102 19,165 318 1.69 238 -2.86 0.0011
2020-08-03 2020-06-30 13F GOSSAMER BIO COM 38341P102 18,847 7,247 62.47 245 107.63 0.0013
2020-05-15 2020-03-31 13F GOSSAMER BIO COM 38341P102 11,600 -8,494 -42.27 118 -62.42 0.0008
2020-02-12 2019-12-31 13F GOSSAMER BIO COM 38341P102 20,094 20,094 314 0.0015
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.