SCHEDULE 13G Filed 2026-06-11 Event — SEC 0001404574-26-000021 →

683 Capital Management, LLC → Gossamer Bio, Inc. GOSS

Stake: — Shares: — CUSIP: 38341P102 Class: Common Stock, $0.0001 par value

Composite Decision Signal · PASS (LOW BASE-RATE EDGE) Conviction Score: 29/100

Passive Schedule 13G filer baseline
Held by 1 tracked 13F institutional manager
6 NPORT-P mutual funds holding CUSIP
Elevated short days-to-cover (5.1 DTC)
Short interest building (+16.0% vs prior settlement)

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

6 filings by this filer

5 other filings in the data moat

Short Interest · settle 2026-10-15

DTC 5.12

1,436,240 shares short · +16.0% 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 →
2026-08-24	SCHEDULE 13D/A	D. E. SHAW & CO, L.P.	—	27,698,267	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	DeepCurrents Investment Group LLC	—	—	view →
2026-06-09	SCHEDULE 13G	Context Capital Management, LLC	—	—	view →

Other Filings by 683 Capital Management, LLC

Filed	Form	Issuer	Stake	Shares
2026-09-03	SCHEDULE 13G	Rainier Acquisition Corporation	—	—	view →
2026-09-03	SCHEDULE 13G	Rainier Acquisition Corporation	—	—	view →
2020-02-19	SC	Onconova Therapeutics, Inc. TRAW	—	—	view →
2018-05-01	SC	Onconova Therapeutics, Inc. TRAW	—	—	view →
2018-02-16	SC	Onconova Therapeutics, Inc. TRAW	—	—	view →

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