13D·WATCH Activist + Insider Intelligence Live feed Blog About Pricing
ISSUER PROFILE · CIK 0001728117 · CUSIP 38341P102

Gossamer Bio, Inc.GOSS

6 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
6
2 SCHEDULE 13D/A · 1 SCHEDULE 13D · 3 SCHEDULE 13G
Distinct filers
4
multi-activist cluster
Insiders (365d)
0
0 buys · 0 sales
Latest short DTC
3.79
as of 2026-07-15

Institutional Consensus · 2025-12-31

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

13D/G Filings Timeline · 6 total

FiledFormFilerStakeSharesIntent
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 →
2026-06-11 SCHEDULE 13G 683 Capital Management, LLC view →
2026-06-09 SCHEDULE 13G Context Capital Management, LLC view →

FINRA Short Interest History

SettlementShort InterestDays to Cover% Δ vs prior
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%
2026-04-15 40,196,107 4.85 +7.2%
2026-03-31 37,500,300 2.75 +2.4%
2026-03-13 36,622,286 2.70 +5.5%
2026-02-27 34,715,538 1.00 +11.7%
2026-02-13 31,092,342 5.10 +16.1%
2026-01-30 26,779,236 5.68 +6.2%

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