GOSSNasdaq

Gossamer Bio, Inc.

Alert me on GOSS

Insider buys, 6 months

Congress trades, 6 months

Signals, 6 months

Six months

After each filing

No purchase or sale on this ticker by a member of Congress or an insider yet.

Filings for GOSS

57 held · newest 557 held · newest 2

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See all 57 filings for GOSS

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Signal history

No signal for this ticker yet. A signal is written when insider buying here scores one dot or more.

Stakes

Sep 30, 2026 Schedule 13G, amended

Opaleye Management Inc.: 7%, 426,989 shares

Oct 30, 2026 Schedule 13G

FMR LLC: 10.9%, 667,465 shares

Oct 27, 2026 Schedule 13D, amended

D. E. Shaw & Co., L.L.C.: 4.2%, 255,431 shares

Oct 6, 2026 Schedule 13D, amended

D. E. Shaw & Co., L.L.C.: 6%, 369,459 shares

Sep 24, 2026 Schedule 13D, amended

D. E. Shaw & Co., L.L.C.: 5.1%, 312,048 shares

Aug 20, 2026 Schedule 13D, amended

D. E. Shaw & Co., L.L.C.: 6%, 29,128,194 shares

Jul 22, 2026 Schedule 13G

Opaleye Management Inc.: 5.1%, 24,942,565 shares

Jun 30, 2026 Schedule 13G, amended

BlackRock, Inc.: 1%, 4,890,593 shares

Jul 22, 2026 Schedule 13D, amended

D. E. Shaw & Co., L.P.: 7.1%, 34,609,565 shares

Jun 29, 2026 Schedule 13D, amended

D. E. Shaw & Co., L.P.: 8.3%, 40,630,726 shares

Jun 4, 2026 Schedule 13D

D. E. Shaw & Co., L.P.: 9.5%, 46,485,295 shares

Jun 4, 2026 Schedule 13G

DeepCurrents Investment Group LLC: 7.7%, 37,665,073 shares

Jun 4, 2026 Schedule 13G

683 Capital Management, LLC: 10%, 49,868,571 shares

Jun 4, 2026 Schedule 13G

Context Capital Management, LLC: 9.9%, 48,835,788 shares

Mar 31, 2026 Schedule 13G, amended

Octagon Capital Advisors LP: 3.8%, 8,976,054 shares

Mar 13, 2026 Schedule 13G, amended

The Vanguard Group: 0%, 0 shares

Mar 18, 2026 Schedule 13G, amended

683 Capital Management, LLC: 3.9%, 9,331,304 shares

Feb 23, 2026 Schedule 13G

683 Capital Management, LLC: 5.2%, 12,331,304 shares

Feb 23, 2026 Schedule 13D, amended

Growth Equity Opportunities 18 VGE, LLC: 1.7%, 4,065,134 shares

Dec 31, 2025 Schedule 13G, amended

Octagon Capital Advisors LP: 6.5%, 15,141,425 shares

Dec 31, 2025 Schedule 13G, amended

BlackRock, Inc.: 6.5%, 15,065,708 shares

Schedule 13D is filed within 5 business days of crossing 5 percent by an investor who may seek to influence the company. Schedule 13G is filed by a passive holder, and a large institution has up to 45 days after the quarter end.

Government contracts, last 12 months

Awards of $10M and up, from USAspending · context, not a signal

No contracts of $10M or more in the last 12 months.

Lobbying

Last four quarters

NoneQ4 2025

NoneQ1 2026

NoneQ2 2026

$10KQ3 2026

The first quarter on file. Reported to the Senate each quarter by the firms it hires.Original report ↗

Read from LDA.gov on Oct 21, 2026. Senate Office of Public Records cannot vouch for the data or analyses derived from these data after the data have been retrieved from LDA.gov.