SCHEDULE 13D/A Filed 2026-08-24 Event 2026-08-20 SEC 0001104659-26-100440 →

D. E. SHAW & CO, L.P. → Gossamer Bio, Inc. GOSS

Stake: — Shares: 27,698,267 Class: Common Stock, $0.0001 par value per share

Item 4 — Purpose of Transaction

Not extracted from this filing — typically because it's an amendment (13D/A) and Item 4 is unchanged from the parent filing. Read the raw SEC filing →

Cross-References

Insider Activity (last 365d)

0 transactions

0 buys · 0 sales · 0 awards/exercises

Issuer Cluster

9 13D/G filings on this issuer

8 other filings besides this one

Filer Track Record

18 filings by this filer

17 other filings in the data moat

Short Interest · settle 2026-09-30

DTC 3.50

1,237,721 shares short · +30.5% vs prior

Institutional Consensus · 2025-12-31

Held by elite portfolio managers

1 holder · $388K

Point72 Asset Mgmt

Other 13D/G Filings on Gossamer Bio, Inc.

Filed	Form	Filer	Stake	Shares
2026-10-08	SCHEDULE 13D/A	D. E. SHAW & CO, L.P.	6.00%	358,693	view →
2026-09-28	SCHEDULE 13D/A	D. E. SHAW & CO, L.P.	—	296,858	view →
2026-07-24	SCHEDULE 13D/A	D. E. SHAW & CO, L.P.	7.10%	32,642,631	view →
2026-07-01	SCHEDULE 13D/A	D. E. SHAW & CO, L.P.	8.30%	38,362,468	view →
2026-06-11	SCHEDULE 13D	D. E. SHAW & CO, L.P.	9.50%	43,915,249	view →
2026-06-11	SCHEDULE 13G	683 Capital Management, LLC	—	—	view →
2026-06-11	SCHEDULE 13G	DeepCurrents Investment Group LLC	—	—	view →
2026-06-09	SCHEDULE 13G	Context Capital Management, LLC	—	—	view →

Other Filings by D. E. SHAW & CO, L.P.

Filed	Form	Issuer	Stake	Shares
2026-10-08	SCHEDULE 13D/A	Gossamer Bio, Inc.	6.00%	358,693	view →
2026-09-28	SCHEDULE 13D/A	Gossamer Bio, Inc.	—	296,858	view →
2026-09-15	SCHEDULE 13G	Venture Global, Inc.	—	—	view →
2026-07-24	SCHEDULE 13D/A	Gossamer Bio, Inc.	7.10%	32,642,631	view →
2026-07-17	SCHEDULE 13G	CleanSpark, Inc.	—	—	view →
2026-07-09	SCHEDULE 13G	Alight, Inc. ALIT	—	—	view →
2026-07-02	SCHEDULE 13G	Agios Pharmaceuticals, Inc. AGIO	—	—	view →
2026-07-02	SCHEDULE 13G	Inspire Medical Systems, Inc. INSP	—	—	view →
2026-07-01	SCHEDULE 13D/A	Gossamer Bio, Inc. GOSS	8.30%	38,362,468	view →
2026-06-22	SCHEDULE 13G	Cracker Barrel Old Country Store, Inc. CBRL	—	—	view →
2026-06-11	SCHEDULE 13D	Gossamer Bio, Inc. GOSS	9.50%	43,915,249	view →
2026-06-03	SCHEDULE 13D/A	Enviri Corporation	—	0	view →
2026-06-03	SCHEDULE 13G	Enviri Corporation NVRI	—	—	view →
2024-10-09	SC	DIVERSIFIED HEALTHCARE TRUST DHCNL	—	—	view →
2023-10-05	SC	DIVERSIFIED HEALTHCARE TRUST DHCNL	—	—	view →
2023-07-18	SC	DIVERSIFIED HEALTHCARE TRUST DHCNL	—	—	view →
2021-11-10	SC	Decarbonization Plus Acquisition Corp III SLDPW	—	—	view →

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