Company profile
Generation Bio Co. Insider Trading
GBIOEvery SEC Form 4 insider trading filing for Generation Bio Co. (GBIO) 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?
- Sector
- Pharmaceutical Preparations
- CIK
- 0001733294
- Filings
- 147
- Insiders
- 24
- Last filing
- 2026-02-09
Activity summary
No insider transactions in the last 30 days. The most recent was on February 9, 2026, when Atlas Venture Fund X, L.P. reported 711,193 shares (non-open-market activity). 147 filings from 24 insiders are on record below.
Three year balance
Buy and sell value by quarter, Q2 23 to Q1 26. Generation Bio Co. insiders are net buyers across the period shown.
Bars below the rule are sales, above are purchases. Largest quarter on the chart is $779K.
No insider activity recorded for GBIO in the last 90 days.
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Feb 9, 2026 | Atlas Venture Fund X, L.P. | GBIO | U | 711,193 | — | — |
| Feb 9, 2026 | Atlas Venture Fund X, L.P. | GBIO | U | 116,693 | — | — |
| Feb 9, 2026 | Atlas Venture Fund X, L.P. | GBIO | U | 60 | — | — |
| Feb 9, 2026 | Dannielle Appelhans | GBIO | U | 1,263 | — | — |
| Feb 9, 2026 | Dannielle Appelhans | GBIO | U | 736 | — | — |
45 more transactions hidden
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