TECX insider buying and SEC filings, explained
Tectonic Therapeutic, Inc. · CIK 1681087
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Insider activity in the last 12 months
Bought
$182K
Insiders who bought
2
Sold (not marked 10b5-1)
$0
Planned sales (10b5-1)
$651K
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Sep 30, 2026 | Planned (10b5-1) | Peter McNamara (Chief Scientific Officer) sold 536 shares at about $23.04 ($12K), marked as a 10b5-1 plan trade. Holdings down 1% to 54,305 shares. | SEC filing Filed Oct 2, 2026, 5:00 PM ET |
| Aug 25, 2026 | Planned (10b5-1) | Peter McNamara (Chief Scientific Officer) sold 43 shares at $36.52 ($2K), marked as a 10b5-1 plan trade. Holdings down <1% to 55,285 shares. | SEC filing Filed Aug 26, 2026 |
| Aug 12, 2026 | Planned (10b5-1) | Peter McNamara (Chief Scientific Officer) sold 43 shares at $35.00 ($2K), marked as a 10b5-1 plan trade. Holdings down <1% to 55,285 shares. | SEC filing Filed Aug 14, 2026 |
| Jun 30, 2026 | Planned (10b5-1) | Peter McNamara (Chief Scientific Officer) sold 172 shares at $35.00 ($6K), marked as a 10b5-1 plan trade. Holdings down <1% to 55,285 shares. | SEC filing Filed Jul 1, 2026 |
| May 4, 2026 | Planned (10b5-1) | Marcella K. Ruddy (Chief Medical Officer) sold 1,065 shares at $30.00 ($32K), marked as a 10b5-1 plan trade. Holdings down 2% to 67,682 shares. | SEC filing Filed May 6, 2026 |
| Apr 1, 2026 | Planned (10b5-1) | Marcella K. Ruddy (Chief Medical Officer) sold 1,000 shares at $31.05 ($31K), marked as a 10b5-1 plan trade. Holdings down 1% to 68,747 shares. | SEC filing Filed Apr 3, 2026 |
| Mar 6, 2026 | Planned (10b5-1) | Marcella K. Ruddy (Chief Medical Officer) sold 10,000 shares at $30.00 ($300K), marked as a 10b5-1 plan trade. Holdings down 13% to 69,747 shares. | SEC filing Filed Mar 9, 2026 |
| Mar 6, 2026 | Planned (10b5-1) | Peter McNamara (Chief Scientific Officer) sold 6,262 shares at about $30.17 ($189K), marked as a 10b5-1 plan trade. Holdings down 10% to 55,285 shares. | SEC filing Filed Mar 9, 2026 |
| Mar 3–4, 2026 | Planned (10b5-1) | Peter McNamara (Chief Scientific Officer) sold 3,299 shares between Mar 3 and Mar 4 at about $23.53 ($78K), marked as a 10b5-1 plan trade. Holdings down 5% to 58,832 shares. | SEC filing Filed Mar 5, 2026 |
| Feb 11, 2026 | Purchase (code P) Amended filing | Alise Reicin (CEO and Director) bought 2,500 shares indirectly (by trust) at about $21.10 ($53K), reported as a purchase (code P). Holdings by trust up 2% to 127,030 shares. Not marked as a 10b5-1 plan trade. This amends a filing from Feb 12. | SEC filing Filed Mar 5, 2026 |
| Feb 10, 2026 | Purchase (code P) | Daniel Lochner (CFO) bought 6,000 shares at about $21.61 ($130K), reported as a purchase (code P). Holdings up 23% to 32,044 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 11, 2026 |
36 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
2 insiders bought in 30 days
$182K in purchases since Feb 10, 2026 · Purchases traded Feb 10, 2026 to Feb 11, 2026 · Closed
| Insider | Value | Traded | Source |
|---|---|---|---|
| Daniel Lochner (CFO) | $130K | Feb 10, 2026 | SEC filing |
| Alise Reicin (CEO) | $53K | Feb 11, 2026 | SEC filing |
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
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