Summary
Updated Aug 31, 2026
Atlas Venture Fund X, L.P. files SEC Form 4 reports at Generation Bio Co. (GBIO). 1 SEC Form 4 filing on record, dated 9 February 2026.
Recent Transactions
3Every recent SEC Form 4 transaction Atlas Venture Fund X, L.P. has reported, most recent first.
Other Insiders Active in the Same Sector
No other insider has filed at Atlas Venture Fund X, L.P.'s companies, so these are insiders reporting open-market trades at other companies in the same sector.
- GTCR INVESTMENT XI LLC - $760.39M of SHC open-market activity in the last 12 months
- Martine A. Rothblatt - $703.37M of UTHR open-market activity in the last 12 months
- Ronda E. Stryker - $580.89M of SYK open-market activity in the last 12 months
- Keith A. Meister - $533.93M of ILMN open-market activity in the last 12 months
- TPG GP A, LLC - $516.71M of LFST open-market activity in the last 12 months
- BERKSHIRE HATHAWAY INC - $473.67M of DVA open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
What is Atlas Venture Fund X, L.P.?
Atlas Venture Fund X, L.P. is an investment firm of Generation Bio Co. (GBIO). InsiderAlpha holds 1 primary Form 4 filing for it, the earliest from 2026, updated as new SEC EDGAR filings are processed.
When did Atlas Venture Fund X, L.P. last file a Form 4?
The only primary Form 4 on record is dated 9 February 2026.
Where can I see all of Atlas Venture Fund X, L.P.'s SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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