Company profile
Gossamer Bio, Inc. Insider Trading
GOSSEvery SEC Form 4 insider trading filing for Gossamer Bio, Inc. (GOSS) since April 2023 — open-market buys and sells by directors and officers, option exercises, and cluster activity, updated as each filing is reported to the SEC. Why 2023?
- Exchange
- Nasdaq
- Sector
- Pharmaceutical Preparations
- CIK
- 0001728117
- Filings
- 86
- Insiders
- 14
- Last filing
- 2026-08-24
Activity summary
Recent insider activity is bullish. Over the last 30 days, 7 insiders purchased shares (net $191K). Buying was led by Faheem Hasnain.
Three year balance
Buy and sell value by quarter, Q4 23 to Q3 26. Gossamer Bio, Inc. insiders are net buyers across the period shown.
Bars below the rule are sales, above are purchases. Largest quarter on the chart is $324K.
90 day insight
Over the last 90 days, Gossamer Bio, Inc. insiders bought $191K across 7 transactions with no open-market sales.
- Most active insider: Faheem Hasnain with 2 transactions totaling $166K.
- Largest single purchase: $166K by Faheem Hasnain on Aug 24, 2026.
Activity skews bullish — buys outpace sales.
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 24, 2026 | Robert Paul Smith JR | GOSS | Award | 5,800,051 | — | — |
| Aug 24, 2026 | Caryn Peterson | GOSS | Award | 5,800,051 | — | — |
| Aug 24, 2026 | Bryan Giraudo | GOSS | Award | 25 | $1000.00 | $25K |
| Aug 24, 2026 | Faheem Hasnain | GOSS | Award | 5,800,051 | — | — |
| Aug 24, 2026 | Waage Christian | GOSS | Award | 2,900,026 | — | — |
45 more transactions hidden
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The same rows, over the API.
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-H "X-Api-Key: $KEY"Top insiders
By total value filed.
Institutional Ownership
Top 13F-HR holders of Gossamer Bio, Inc. as of 2026-06-30
Data source: quarterly 13F-HR filings — institutional holders report positions within 45 days of quarter end. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →