Insiders / Atlas Venture Fund XI, L.P.
Atlas Venture Fund XI, L.P.
CIK 1708269personinsiderbeneficial owner
Companies
7
First seen
Feb 16, 2021
Last activity
Aug 13, 2026
Companies
| Company | Shares held | Latest |
|---|---|---|
| Third Harmonic Bio, Inc. · THRD | 9,798,075 | — |
| Dyne Therapeutics, Inc. · DYN | 6,562,578 | — |
| Day One Biopharmaceuticals, Inc. · DAWN | 6,258,534 | — |
| Sionna Therapeutics, Inc. · SION | 3,694,020 | — |
| Xilio Therapeutics, Inc. · XLO | 2,754,109 | — |
| Ikena Oncology, Inc. · IKNA | 2,116,569 | — |
| Frequency Therapeutics, Inc. · FREQ | — | — |
All securities held
6 positions · latest reported per filing
Shares
| Company | Security | Shares |
|---|---|---|
| Day One Biopharmaceuticals, Inc. | Common stock | 6,258,534 |
| Dyne Therapeutics, Inc. | Common stock | 6,562,578 |
| Ikena Oncology, Inc. | Common stock | 2,116,569 |
| Sionna Therapeutics, Inc. | Common stock | 3,694,020 |
| Third Harmonic Bio, Inc. | Common stock | 9,798,075 |
| Xilio Therapeutics, Inc. | Common stock | 2,754,109 |
Ownership percentages elsewhere on the site count common and ordinary shares only, because that is what shares outstanding are measured in. Everything above is a real holding; not all of it is a share of the company.
Activity
InsidersInstitutions
This person's trades in company stock, across every company.| Date | Action | Company | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|
| Feb 27, 2024 | Sell Open-market sale | DYN Dyne Therapeutics, Inc. Common Stock | $6.65M | -273K -4.44% | 5,878,544 3.15% of shares | medium |
| Sep 19, 2022 | Buy Open-market buy | THRD Third Harmonic Bio, Inc. Common Stock | $5.10M | +300K +3.00% | 10,313,763 | high |
| Feb 15, 2024 | Sell Open-market sale | DYN Dyne Therapeutics, Inc. Common Stock |