Gossamer Bio, Inc. SEC filings GOSS
Gossamer Bio, Inc. has 484 filings in SEC EDGAR's recent list, going back to Jan 19, 2018. Its latest annual report, Form ARS, was filed on Apr 24, 2026 for the period ended Apr 24, 2026. The latest quarterly report (Form 10-Q) was filed on Aug 13, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Oct 28, 2026 (shareholder vote results). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 8-K |
Current report
Shareholder vote results
|
Oct 28, 2026 | Oct 27, 2026 |
| 8-K |
Current report
Other events
|
Sep 28, 2026 | Sep 25, 2026 |
| 8-K |
Current report
Other events
|
Sep 23, 2026 | Sep 23, 2026 |
| 8-K |
Current report
Officer or director change
|
Sep 16, 2026 | Sep 16, 2026 |
| 8-K |
Current report
Change to shareholder rights, Bylaw or fiscal year change, Other events
|
Sep 11, 2026 | Sep 10, 2026 |
| 8-K |
Current report
Other events
|
Sep 9, 2026 | Sep 9, 2026 |
| 8-K |
Current report
Bylaw or fiscal year change
|
Sep 3, 2026 | Sep 3, 2026 |
| 8-K |
Current report
Bylaw or fiscal year change
|
Aug 26, 2026 | Aug 24, 2026 |
| 8-K |
Current report
Material agreement, Unregistered share sale, Bylaw or fiscal year change, Regulation FD disclosure
|
Aug 21, 2026 | Aug 20, 2026 |
| 8-K |
Current report
Results of operations
|
Aug 13, 2026 | Aug 13, 2026 |
| 8-K |
Current report
Material agreement, Agreement ended, Results of operations, Regulation FD disclosure, Other events
|
Jul 27, 2026 | Jul 23, 2026 |
| 8-K |
Current report
Officer or director change, Bylaw or fiscal year change, Shareholder vote results
|
Jul 15, 2026 | Jul 14, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
Jul 1, 2026 | Jul 1, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
Jun 17, 2026 | Jun 17, 2026 |
| 8-K |
Current report
Material agreement, Agreement ended, New debt, Unregistered share sale, Regulation FD disclosure
|
Jun 5, 2026 | Jun 3, 2026 |
| 8-K |
Current report
Shareholder vote results
|
Jun 5, 2026 | Jun 4, 2026 |
| 8-K |
Current report
Other events
|
Jun 2, 2026 | Jun 2, 2026 |
| 8-K |
Current report
Material agreement, Results of operations, Officer or director change, Regulation FD disclosure, Other events
|
May 18, 2026 | May 18, 2026 |
| 8-K |
Current report
Listing notice
|
Apr 9, 2026 | Apr 8, 2026 |
| 8-K |
Current report
Results of operations
|
Mar 17, 2026 | Mar 17, 2026 |
| 8-K |
Current report
Other events
|
Feb 23, 2026 | Feb 23, 2026 |
| 8-K |
Current report
Results of operations
|
Nov 5, 2025 | Nov 5, 2025 |
| 8-K |
Current report
Unregistered share sale
|
Sep 25, 2025 | Sep 24, 2025 |
| 8-K |
Current report
Results of operations
|
Aug 5, 2025 | Aug 5, 2025 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Jun 25, 2025 | Jun 25, 2025 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Jun 16, 2025 | Jun 16, 2025 |
| 8-K |
Current report
Results of operations
|
May 15, 2025 | May 15, 2025 |
| 8-K |
Current report
Results of operations
|
Mar 13, 2025 | Mar 13, 2025 |
| 8-K |
Current report
Other events
|
Feb 19, 2025 | Feb 19, 2025 |
| 8-K |
Current report
Results of operations
|
Nov 7, 2024 | Nov 7, 2024 |
| 8-K |
Current report
Listing notice
|
Sep 13, 2024 | Sep 11, 2024 |
| 8-K |
Current report
Results of operations
|
Aug 12, 2024 | Aug 12, 2024 |
| 8-K |
Current report
Other events
|
Jul 18, 2024 | Jul 18, 2024 |
| 8-K |
Current report
Shareholder vote results
|
Jun 10, 2024 | Jun 6, 2024 |
| 8-K |
Current report
Listing notice
|
May 24, 2024 | May 22, 2024 |
| 8-K |
Current report
Results of operations
|
May 7, 2024 | May 7, 2024 |
| 8-K |
Current report
Material agreement, Agreement ended, Unregistered share sale, Other events
|
May 6, 2024 | May 3, 2024 |
| 8-K |
Current report
Officer or director change
|
Mar 12, 2024 | Mar 11, 2024 |
| 8-K |
Current report
Results of operations
|
Mar 5, 2024 | Mar 5, 2024 |
| 8-K |
Current report
Other events
|
Mar 4, 2024 | Mar 4, 2024 |
| 8-K |
Current report
Officer or director change
|
Nov 29, 2023 | Nov 28, 2023 |
| 8-K |
Current report
Officer or director change, Bylaw or fiscal year change
|
Nov 27, 2023 | Nov 20, 2023 |
| 8-K |
Current report
Results of operations
|
Nov 9, 2023 | Nov 9, 2023 |
| 8-K |
Current report
Listing notice
|
Oct 20, 2023 | Oct 19, 2023 |
| 8-K |
Current report
Officer or director change
|
Sep 7, 2023 | Sep 6, 2023 |
| 8-K |
Current report
Results of operations
|
Aug 8, 2023 | Aug 8, 2023 |
| 8-K |
Current report
Material agreement, Unregistered share sale, Regulation FD disclosure
|
Jul 20, 2023 | Jul 19, 2023 |
| 8-K |
Current report
Other events
|
Jul 20, 2023 | Jul 20, 2023 |
| 8-K |
Current report
Bylaw or fiscal year change, Shareholder vote results
|
Jun 9, 2023 | Jun 8, 2023 |
| 8-K |
Current report
Results of operations
|
May 9, 2023 | May 9, 2023 |
| 8-K |
Current report
Other events
|
Apr 3, 2023 | Apr 3, 2023 |
| 8-K |
Current report
Results of operations
|
Mar 17, 2023 | Mar 17, 2023 |
| 8-K |
Current report
Other events
|
Dec 6, 2022 | Dec 6, 2022 |
| 8-K |
Current report
Results of operations
|
Nov 3, 2022 | Nov 3, 2022 |
| 8-K |
Current report
Results of operations
|
Aug 9, 2022 | Aug 9, 2022 |
| 8-K |
Current report
Material agreement, Unregistered share sale, Regulation FD disclosure
|
Jul 13, 2022 | Jul 13, 2022 |
| 8-K |
Current report
Shareholder vote results
|
Jun 10, 2022 | Jun 9, 2022 |
| 8-K |
Current report
Results of operations
|
May 10, 2022 | May 10, 2022 |
| 8-K |
Current report
Results of operations, Other events
|
Apr 25, 2022 | Apr 25, 2022 |
| 8-K |
Current report
Results of operations
|
Mar 3, 2022 | Mar 3, 2022 |
| 8-K |
Current report
Results of operations
|
Nov 8, 2021 | Nov 8, 2021 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Oct 12, 2021 | Oct 11, 2021 |
| 8-K |
Current report
Officer or director change
|
Sep 21, 2021 | Sep 16, 2021 |
| 8-K |
Current report
Results of operations
|
Aug 9, 2021 | Aug 9, 2021 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Jun 14, 2021 | Jun 9, 2021 |
| 8-K |
Current report
Results of operations
|
May 6, 2021 | May 6, 2021 |
| 8-K |
Current report
Officer or director change
|
Apr 20, 2021 | Apr 17, 2021 |
| 8-K |
Current report
Results of operations
|
Feb 25, 2021 | Feb 25, 2021 |
| 8-K |
Current report
Officer or director change
|
Nov 17, 2020 | Nov 16, 2020 |
| 8-K |
Current report
Results of operations
|
Nov 10, 2020 | Nov 10, 2020 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Oct 13, 2020 | Oct 13, 2020 |
| 8-K |
Current report
Results of operations
|
Aug 11, 2020 | Aug 11, 2020 |
| 8-K |
Current report
Material agreement, New debt
|
Jul 2, 2020 | Jul 2, 2020 |
| 8-K |
Current report
Shareholder vote results
|
Jun 18, 2020 | Jun 17, 2020 |
| 8-K |
Current report
Material agreement, New debt, Other events
|
May 21, 2020 | May 18, 2020 |
| 8-K |
Current report
Results of operations
|
May 12, 2020 | May 12, 2020 |
| 8-K |
Current report
Results of operations
|
Mar 24, 2020 | Mar 24, 2020 |
| 8-K |
Current report
Regulation FD disclosure
|
Jan 13, 2020 | Jan 13, 2020 |
| 8-K |
Current report
Results of operations
|
Nov 12, 2019 | Nov 12, 2019 |
| 8-K |
Current report
Officer or director change
|
Sep 13, 2019 | Sep 12, 2019 |
| 8-K |
Current report
Results of operations
|
Aug 8, 2019 | Aug 8, 2019 |
| 8-K |
Current report
Shareholder vote results
|
Jun 11, 2019 | Jun 10, 2019 |
| 8-K |
Current report
Officer or director change
|
May 30, 2019 | May 30, 2019 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
May 14, 2019 | May 14, 2019 |
| 8-K |
Current report
Material agreement, New debt
|
May 3, 2019 | May 2, 2019 |
| 8-K |
Current report
Results of operations
|
Mar 22, 2019 | Mar 22, 2019 |
| 8-K |
Current report
Officer or director change
|
Mar 11, 2019 | Mar 7, 2019 |
| 8-K |
Current report
Bylaw or fiscal year change
|
Feb 12, 2019 | Feb 12, 2019 |
Showing 88 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Pharmaceutical Preparations (SIC 2834)
- Listed as
- GOSS (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- San Diego, CA
- SEC filer status
- Non-accelerated filer, Smaller reporting company
- SEC CIK
- 1728117
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.