Gossamer Bio, Inc. (GOSS) is a publicly traded company in the Unknown sector. Across all available filings, 18 corporate insiders have executed 108 transactions totaling $16.0M, demonstrating a bearish sentiment with -$6.9M in net insider flow. The most recent transaction on Oct 1, 2025 involved a transaction of 125,000 shares valued at $0.
No significant insider buying has been recorded for GOSS in the recent period.
No significant insider selling has been recorded for GOSS in the recent period.
Based on recent SEC filings, insider sentiment for GOSS is bearish with an Insider Alignment Score of 28/100 and a net flow of -$6.9M. Insiders are reducing their positions, though this can be driven by factors unrelated to company outlook.
Insider trading at Gossamer Bio, Inc. (GOSS) refers to stock transactions made by corporate insiders—executives, directors, and beneficial owners holding more than 10% of the company's shares. These individuals have access to material non-public information and are required by law to report their trades to the SEC within two business days. Currently, 18 insiders are actively trading GOSS stock, having executed 108 transactions in the past 90 days. The most active insider is Faheem Hasnain (Executive), who has made 13 transactions totaling $4.6M.
Get notified when executives and directors at GOSS file new Form 4 transactions
Date | Insider | Title | Type | Shares | Price | Value | Flags |
|---|---|---|---|---|---|---|---|
| Oct 1, 2025 | Peterson Caryn | Executive | Award | 125,000 | $N/A | $0 | |
| Oct 1, 2025 | Hasnain Faheem | Executive | Award | 437,500 | $N/A | $0 | |
| Oct 1, 2025 | Aranda Richard | Executive | Award | 162,500 | $N/A | $0 | |
| Oct 1, 2025 | Giraudo Bryan | Executive | Award | 181,250 | $N/A | $0 | |
| Oct 1, 2025 | Christian Waage | Executive | Award | 125,000 | $N/A | $0 | |
| Oct 1, 2025 | Paul Smith Robert Jr | Executive | Award | 162,500 | $N/A | $0 | |
| Aug 19, 2025 | Milligan Sandra | Executive | Purchase | 26,050 | $1.92 | $50.0K | |
| Jun 24, 2024 | Aranda Richard | Executive | Sale | 1,908 | $0.66 | $1.3K | |
| Jun 21, 2024 | Hasnain Faheem | Executive | Purchase | 372,000 | $0.67 | $249.2K | |
| Jun 18, 2024 | Giraudo Bryan | Executive | Purchase | 100,000 | $0.59 | $59.0K | |
| Jun 17, 2024 | Paul Smith Robert Jr | Executive | Purchase | 25,000 | $0.60 | $15.0K | |
| Mar 27, 2024 | Hasnain Faheem | Executive | Sale | 23,172 | $1.16 | $26.9K | |
| Mar 27, 2024 | Giraudo Bryan | Executive | Sale | 6,430 | $1.16 | $7.5K | |
| Mar 27, 2024 | Christian Waage | Executive | Sale | 6,430 | $1.16 | $7.5K | |
| Mar 18, 2024 | Peterson Caryn | Executive | Sale | 4,018 | $1.33 | $5.3K |
| TYPE | COUNT | VALUE | % |
|---|---|---|---|
Sale(S) | 41 | $11.5M | 65.3% |
Purchase(P) | 28 | $4.5M | 25.9% |
Award(A) | 22 | $1.1M | 6.3% |
Exercise(M) | 2 | $449.8K | 2.6% |
Gift(G) | 1 | $0 | 0.0% |
Conversion(C) | 14 | $0 | 0.0% |
Insider selling pressure at Gossamer Bio, Inc. has increased, with 18 insiders executing 108 transactions across all time. Total sales of $11.5M significantly outpace purchases of $4.5M, resulting in a net outflow of $6.9M. This selling activity appears largely discretionary, which may warrant closer attention from investors.