13D·WATCH Activist + Insider Intelligence Live feed Blog About Pricing
ISSUER PROFILE · CIK 0001728117 · CUSIP 38341P201

Gossamer Bio, Inc.GOSS

9 13D/G filings 4 distinct filers 0 insider transactions (365d)

Post-Filing Returns · across 2 activist filings on this issuer

Median 30d
+8.1%
avg +8.1%
Median 60d
—
avg —
Median 90d
—
avg —
Median 180d
—
avg —

Returns measured from each activist filing's date_of_event, split + dividend adjusted via Yahoo Finance.

Cross-Reference Snapshot

Activist filings
9
5 SCHEDULE 13D/A · 3 SCHEDULE 13G · 1 SCHEDULE 13D
Distinct filers
4
multi-activist cluster
Insiders (365d)
0
0 buys · 0 sales
Latest short DTC
5.12
as of 2026-10-15

Institutional Consensus · 2025-12-31

Held by elite portfolio managers
1 holder · $388K
Point72 Asset Mgmt

13D/G Filings Timeline · 9 total

FiledFormFilerStakeSharesIntent
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 13G 683 Capital Management, LLC — — view →
2026-06-11 SCHEDULE 13G DeepCurrents Investment Group LLC — — view →
2026-06-11 SCHEDULE 13D D. E. SHAW & CO, L.P. 9.50% 43,915,249 view →
2026-06-09 SCHEDULE 13G Context Capital Management, LLC — — view →

FINRA Short Interest History

SettlementShort InterestDays to Cover% Δ vs prior
2026-10-15 1,436,240 5.12 +16.0%
2026-09-30 1,237,721 3.50 +30.5%
2026-09-15 948,623 5.07 -98.8%
2026-08-31 82,633,317 2.79 -4.8%
2026-08-14 86,786,498 7.37 -8.6%
2026-07-31 94,986,016 1.49 +29.8%
2026-07-15 73,178,841 3.79 +36.3%
2026-06-30 53,695,991 3.22 -4.5%
2026-06-15 56,212,006 3.41 -10.5%
2026-05-29 62,815,917 2.84 +53.8%
2026-05-15 40,838,667 11.48 +2.0%
2026-04-30 40,018,309 7.65 -0.4%

Alert me when any activist files on Gossamer Bio, Inc.

Free. We email you when criteria match. One-click unsubscribe in every email.

Track every activist who touches this name.

Free $0 (48h-delayed alerts) · Individual $49/mo (real-time) · Team & API $199/mo · Enterprise.

See pricing →