Gossamer Bio, Inc.
DE ˙ DB ˙ US38341P1021
0,17 € ↑0,02 (10,16%)
2026-06-05
DEL PRIS
SecurityDE:4GB / Gossamer Bio, Inc.
InstitutionJustInvest LLC
Latest Disclosed Ownership17,531 shares
Latest Disclosed Value $ 5,759
JustInvest LLC reports 8.76% increase in ownership of 4GB / Gossamer Bio, Inc.

On May 14, 2026 - JustInvest LLC filed a 13F-HR form disclosing ownership of 17,531 shares of Gossamer Bio, Inc. (DE:4GB) valued at $4,818 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 16,119 shares of Gossamer Bio, Inc.. This represents a change in shares of 8.76% during the quarter. The current value of the position is $2,945 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)
2026-05-14 2026-03-31 13F GOSSAMER BIO COM 38341P102 17,531 1,412 8.76 6 -89.80 0.0001
2026-02-13 2025-12-31 13F GOSSAMER BIO COM 38341P102 16,119 -600 -3.59 50 13.95 0.0005
2025-10-31 2025-09-30 13F GOSSAMER BIO COM 38341P102 16,719 231 1.40 44 115.00 0.0005
2025-07-25 2025-06-30 13F GOSSAMER BIO COM 38341P102 16,488 -531 -3.12 20 11.11 0.0002
2025-05-14 2025-03-31 13F GOSSAMER BIO COM 38341P102 17,019 2,455 16.86 19 38.46 0.0003
2025-02-10 2024-12-31 13F GOSSAMER BIO COM 38341P102 14,564 2,510 20.82 13 18.18 0.0002
2024-11-12 2024-09-30 13F GOSSAMER BIO COM 38341P102 12,054 -4,234 -25.99 12 -21.43 0.0002
2024-08-12 2024-06-30 13F GOSSAMER BIO COM 38341P102 16,288 4,073 33.34 15 0.00 0.0003
2024-05-09 2024-03-31 13F GOSSAMER BIO COM 38341P102 12,215 12,215 14 0.0003
2023-11-08 2023-09-30 13F GOSSAMER BIO COM 38341P102 0 -44,356 -100.00 0 -100.00
2023-07-28 2023-06-30 13F GOSSAMER BIO COM 38341P102 44,356 44,356 53 0.0016
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.