Tectonic Therapeutic, Inc. (TECX) Insider Trading
Over the last 3 months, TECX insiders made 0 open-market buys and 3 sales, a net sale of -$9K (SEC Form 4). Over the last 6 months, 75 institutions increased and 80 reduced their position (13F).
Insider Activity
Sentiment
0/100
Buys (3m)
0
Sells (3m)
3
Net (3m)
-$9.1K
Insider trades by month Buys Sells
Feb
Mar
Apr
May
Jul
Aug
Context3-month price +7.8%Institutions accumulating (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Aug 26, 2026 | McNamara Peterofficer: Chief Scientific Officer | Sell | 43 | $36.52 |
| Aug 26, 2026 | McNamara Peterofficer: Chief Scientific Officer | Option | 43 | $14.71 |
| Aug 14, 2026 | McNamara Peterofficer: Chief Scientific Officer | Sell | 43 | $35.00 |
| Aug 14, 2026 | McNamara Peterofficer: Chief Scientific Officer | Option | 43 | $14.71 |
| Jul 1, 2026 | McNamara Peterofficer: Chief Scientific Officer | Option | 172 | $14.71 |
| Jul 1, 2026 | McNamara Peterofficer: Chief Scientific Officer | Sell | 172 | $35.00 |
| Jun 23, 2026 | REICIN ALISEdirector, officer: Chief Executive Officer | Tax | 924 | $30.34 |
| Jun 12, 2026 | Lochner Danielofficer: Chief Financial Officer | Grant | 7,500 | $16.80 |
| Jun 10, 2026 | Chutter Jessica Carolinedirector | Grant | 20,400 | $29.10 |
| Jun 10, 2026 | SPRINGER TIMOTHY Adirector, 10 percent owner: | Grant | 10,200 | $28.56 |
| Jun 10, 2026 | Tipirneni Praveen P.director | Grant | 10,200 | $28.56 |
| Jun 10, 2026 | Donenberg Phillip B.director | Grant | 10,200 | $28.56 |
| Jun 10, 2026 | Vitorovic Stefandirector | Grant | 10,200 | $28.56 |
| May 6, 2026 | Ruddy Marcella K.officer: Chief Medical Officer | Sell | 1,065 | $30.00 |
| Apr 3, 2026 | Ruddy Marcella K.officer: Chief Medical Officer | Sell | 1,000 | $31.05 |
| Apr 3, 2026 | Nader Francoisdirector | Grant | 20,400 | $30.78 |
| Mar 9, 2026 | McNamara Peterofficer: Chief Scientific Officer | Option | 215 | $14.71 |
| Mar 9, 2026 | McNamara Peterofficer: Chief Scientific Officer | Sell | 215 | $35.00 |
| Mar 9, 2026 | McNamara Peterofficer: Chief Scientific Officer | Sell | 6,047 | $30.00 |
| Mar 9, 2026 | McNamara Peterofficer: Chief Scientific Officer | Option | 2,500 | $2.38 |
| Mar 9, 2026 | Ruddy Marcella K.officer: Chief Medical Officer | Sell | 10,000 | $30.00 |
| Mar 5, 2026 | McNamara Peterofficer: Chief Scientific Officer | Grant | 21,000 | $27.41 |
| Mar 5, 2026 | Lochner Danielofficer: Chief Financial Officer | Grant | 26,500 | — |
| Mar 5, 2026 | Lochner Danielofficer: Chief Financial Officer | Grant | 24,250 | $27.41 |
| Mar 5, 2026 | REICIN ALISEdirector, officer: Chief Executive Officer | Buy | 2,500 | $21.10 |
| Mar 5, 2026 | Ruddy Marcella K.officer: Chief Medical Officer | Grant | 26,500 | — |
| Mar 5, 2026 | Ruddy Marcella K.officer: Chief Medical Officer | Grant | 24,250 | $27.41 |
| Mar 5, 2026 | REICIN ALISEdirector, officer: Chief Executive Officer | Grant | 76,500 | — |
| Mar 5, 2026 | REICIN ALISEdirector, officer: Chief Executive Officer | Grant | 69,250 | $27.41 |
| Mar 5, 2026 | Schwabish Marcofficer: Chief Business Officer | Grant | 19,500 | — |
Source: TECX SEC Form 4 filings, latest Aug 26, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their TECX positions over the last 6 months (SEC Form 13F).
Increased
75
New positions
53
Reduced
80
Sold out
11
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| FMR LLC | Increased | 2.8M | Aug 13, 2026 |
| FMR LLC | Increased | 2.8M | May 15, 2026 |
| TCG Crossover Management, LLC | Unchanged | 1.2M | Aug 14, 2026 |
| TCG CROSSOVER MANAGEMENT, LLC | New Position | 1.2M | May 15, 2026 |
| ABRDN PLC | Unchanged | 1.1M | Apr 29, 2026 |
| Aberdeen Group plc | Unchanged | 1.1M | Jul 31, 2026 |
| BlackRock, Inc. | Increased | 863K | Aug 7, 2026 |
| BLACKROCK, INC. | Increased | 860K | May 13, 2026 |
| BRAIDWELL LP | Reduced | 847K | May 15, 2026 |
| First Light Asset Management, LLC | Increased | 801K | Aug 14, 2026 |
| FIRST LIGHT ASSET MANAGEMENT, LLC | New Position | 648K | May 15, 2026 |
| BAKER BROS. ADVISORS LP | Unchanged | 608K | Aug 14, 2026 |
| BAKER BROS. ADVISORS LP | Reduced | 608K | May 15, 2026 |
| 5AM Venture Management, LLC | Unchanged | 607K | Aug 14, 2026 |
| 5AM VENTURE MANAGEMENT, LLC | Unchanged | 607K | May 15, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.