Generation Bio Co. - GBIO
Ownership (Schedule 13D / 13G) · latest 50 filings
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| Filed | Form | Reporting person | Percent | Shares | SEC |
|---|---|---|---|---|---|
| May 14, 2026 | SCHEDULE 13G/A | Atlas Venture Fund X, L.P. | 0.0% | 0 | View |
| May 14, 2026 | SCHEDULE 13G/A | ATLAS VENTURE ASSOCIATES X, L.P. | 0.0% | 0 | View |
| May 14, 2026 | SCHEDULE 13G/A | Atlas Venture Associates X, LLC | 0.0% | 0 | View |
| May 14, 2026 | SCHEDULE 13G/A | Atlas Venture Opportunity Fund I, L.P. | 0.0% | 0 | View |
| May 14, 2026 | SCHEDULE 13G/A | Atlas Venture Associates Opportunity I, L.P. | 0.0% | 0 | View |
| May 14, 2026 | SCHEDULE 13G/A | Atlas Venture Associates Opportunity I, LLC | 0.0% | 0 | View |
| Feb 17, 2026 | SCHEDULE 13G/A | T. Rowe Price Associates, Inc. | 3.1% | 209,641 | View |
| Feb 12, 2026 | SCHEDULE 13G/A | Renaissance Technologies LLC | 4.27% | 287,614 | View |
| Feb 12, 2026 | SCHEDULE 13G/A | Renaissance Technologies Holdings Corporation | 4.27% | 287,614 | View |
| Feb 11, 2026 | SCHEDULE 13G/A | Baselake Partners, LP | 0.0% | 0 | View |
| Feb 11, 2026 | SCHEDULE 13G/A | Baselake Management, LLC | 0.0% | 0 | View |
| Feb 11, 2026 | SCHEDULE 13G/A | David Paolella | 0.0% | 0 | View |
| Feb 06, 2026 | SCHEDULE 13G | Baselake Partners, LP | 5.2% | 350,000 | View |
| Feb 06, 2026 | SCHEDULE 13G | Baselake Management, LLC | 5.2% | 350,000 | View |
| Feb 06, 2026 | SCHEDULE 13G | David Paolella | 5.2% | 350,000 | View |
Percent = "% of class represented by amount beneficially owned" for this reporting person in the filed 13D/13G.
Shares = reported beneficial ownership amount for the same row (not portfolio shares from 13F).
Amendments (/A) can repeat the same holder over time, so rows should not be summed.
Extraction is best-effort from filing text and can be missing or noisy; verify exact figures via the SEC link in each row.