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GOSS

Gossamer Bio, Inc. SEC filings

Pharmaceutical Preparations · Nasdaq · Incorporated in DE

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Filing history

2026-11-06

Passive 5%+ stake update SCHEDULE 13G/A

2026-11-06

Passive 5%+ stake SCHEDULE 13G

2026-10-29

5%+ stake update (13D) SCHEDULE 13D/A

2026-10-28

Current report 8-K

Shareholder vote

2026-10-08

5%+ stake update (13D) SCHEDULE 13D/A

2026-09-28

5%+ stake update (13D) SCHEDULE 13D/A

2026-09-28

Current report 8-K

Other event

2026-09-25

Insider trade 4

2026-09-25

Insider trade 4

2026-09-25

Insider trade 4

2026-09-25

Insider trade 4

2026-09-25

Insider trade 4

2026-09-25

Insider trade 4

2026-09-25

Insider trade 4

2026-09-23

Current report 8-K

Other event

2026-09-22

New insider's holdings 3

2026-09-16

Proxy statement (shareholder vote) DEF 14A

2026-09-16

Current report 8-K

Exec/director change

2026-09-11

Current report 8-K

Shareholder rights changeBylaws changeOther event

2026-09-09

Current report 8-K

Other event

2026-09-04

D D

Item 06b

2026-09-03

PRE 14A PRE 14A

2026-09-03

Current report 8-K

Bylaws change

2026-08-26

Insider trade 4

2026-08-26

Insider trade 4

2026-08-26

Insider trade 4

2026-08-26

Insider trade 4

2026-08-26

Insider trade 4

2026-08-26

Current report 8-K

Bylaws change

2026-08-24

5%+ stake update (13D) SCHEDULE 13D/A

2026-08-21

Current report 8-K

Material agreementShare sale (dilution)Bylaws changeReg FD disclosure

2026-08-13

Current report 8-K

Earnings results

2026-08-13

Quarterly report 10-Q

2026-07-29

Passive 5%+ stake SCHEDULE 13G

2026-07-29

Passive 5%+ stake update SCHEDULE 13G/A

2026-07-27

Current report 8-K

Material agreementAgreement endedEarnings resultsReg FD disclosureOther event

2026-07-24

5%+ stake update (13D) SCHEDULE 13D/A

2026-07-15

Current report 8-K

Exec/director changeBylaws changeShareholder vote

2026-07-01

5%+ stake update (13D) SCHEDULE 13D/A

2026-07-01

Current report 8-K

Reg FD disclosure