Insider holders · CIK 0001681087
Tectonic Therapeutic, Inc. · TECX
Every insider with a reported Table I holding at this company, ranked by their last-reported share count. A balance is only as fresh as its filing — the report date sits next to every row on purpose. ← Back to activity
| Insider | Direct shares | Indirect shares | Total reported | Last report (ET) | From |
|---|---|---|---|---|---|
| ATLAS VENTURE ASSOCIATES X, L.P.10% Owner | — | 4,756,478 | 4,756,478 | Jun 25, 2018 · 6:22 pm EDT | Form 4 |
| Atlas Venture Associates X, LLC10% Owner | — | 4,756,478 | 4,756,478 | Jun 25, 2018 · 6:22 pm EDT | Form 4 |
| Atlas Venture Fund X, L.P.10% Owner | — | 4,756,478 | 4,756,478 | Jun 25, 2018 · 6:22 pm EDT | Form 4 |
| Bruce BoothDirector | — | 4,756,478 | 4,756,478 | Jun 25, 2018 · 6:15 pm EDT | Form 4 |
| Blackstone Clarus III L.L.C.10% Owner | — | 2,962,325 | 2,962,325 | Jan 15, 2019 · 9:24 am EST | Form 3 |
| Clarus Ventures III, LLC10% Owner | — | 2,962,325 | 2,962,325 | Jun 25, 2018 · 6:15 pm EDT | Form 4 |
| Scott RequadtDirector | — | 2,962,325 | 2,962,325 | Jun 25, 2018 · 6:18 pm EDT | Form 4 |
| Clarus Ventures III GP, L.P.10% Owner | — | 2,962,325 | 2,962,325 | Jun 25, 2018 · 6:15 pm EDT | Form 4 |
| Clarus Lifesciences III, L.P.10% Owner | — | 2,962,325 | 2,962,325 | Jun 25, 2018 · 6:15 pm EDT | Form 4 |
| Blackstone Holdings II L.P.10% Owner | — | 2,962,325 | 2,962,325 | Jan 15, 2019 · 9:24 am EST | Form 3 |
| Blackstone Holdings I/II GP Inc10% Owner | — | 2,962,325 | 2,962,325 | Jan 15, 2019 · 9:24 am EST | Form 3 |
| Blackstone Group Management L.L.C.10% Owner | — | 2,962,325 | 2,962,325 | Jan 15, 2019 · 9:24 am EST | Form 3 |
| Blackstone Group L.P.10% Owner | — | 2,962,325 | 2,962,325 | Jan 15, 2019 · 9:24 am EST | Form 3 |
| Stephen A Schwarzman10% Owner | — | 2,962,325 | 2,962,325 | Jan 15, 2019 · 9:24 am EST | Form 3 |
| Geoffrey MackaySee Remarks | 423,523 | 72,604 | 496,127 | Jun 20, 2018 · 8:00 pm EDT | Form 3 |
| Alise ReicinChief Executive Officer | 310,623 | 127,030 | 437,653 | Jun 23, 2026 · 5:52 pm EDT | Form 4 |
| Christopher PaigeDirector | 287,512 | — | 287,512 | Jun 20, 2018 · 8:05 pm EDT | Form 3 |
| SV Life Sciences Fund VI (GP), L.P.10% Owner | — | 63,913 | 63,913 | Jan 18, 2019 · 5:00 pm EST | Form 4 |
| SVLSF VI, LLC10% Owner | — | 63,913 | 63,913 | Jan 18, 2019 · 5:00 pm EST | Form 4 |
| SV Life Sciences Fund VI Strategic Partners, L.P.10% Owner | — | 63,913 | 63,913 | Jan 18, 2019 · 5:00 pm EST | Form 4 |
| SV Life Sciences Fund VI, L.P.10% Owner | — | 63,913 | 63,913 | Jan 18, 2019 · 5:00 pm EST | Form 4 |
| Peter McNamaraChief Scientific Officer | 55,285 | — | 55,285 | Aug 26, 2026 · 4:30 pm EDT | Form 4 |
| Katina DortonChief Financial Officer | 10,000 | — | 10,000 | Oct 10, 2018 · 6:11 pm EDT | Form 4 |
| Nerissa KreherChief Medical Officer | 2,942 | — | 2,942 | Oct 10, 2018 · 6:05 pm EDT | Form 4 |
| Erik OstrowskiChief Financial Officer | 2,300 | — | 2,300 | Jan 4, 2019 · 4:28 pm EST | Form 4 |
Balances come from each insider’s most recent filing that reports a Table I holding; an insider who left the company years ago still appears with their last-known figure and its date. Indirect totals collapse multiple vehicles (trusts, LLCs) into one number — open the filing for the breakdown. Shares as filed, not split-adjusted.