Tectonic Therapeutic, Inc.
TECXHealthcare|Biotechnology|US
$20.64
+1.22 (+6.28%)
DCF Value
$13.73
Tangible Book / Share
$11.64
Cash / Share
$11.91
Ownership Breakdown
52.0%
Float
19.5M
Shares Outstanding
10.2M
Float Shares
Major Holders (20)
Combined: 107.3%
Holders of 5%+ from their latest Schedule 13D/13G filing in the last two years. Percentages are as of each filing date.
| Holder | Type | % of Class | Shares | Filed | Filing |
|---|---|---|---|---|---|
| Timothy A. Springer | IN, OO | 31.50% | 4,313,558 | Apr 7, 2025 | 13D/G |
| FMR LLC | Holding company | 15.00% | 2,799,399 | May 12, 2025 | 13D/G |
| Abigail P. Johnson | Individual | 15.00% | 2,799,399 | May 12, 2025 | 13D/G |
| TAS Partners LLC | Other | 7.40% | 1,382,723 | Apr 7, 2025 | 13D/G |
| Terrance McGuire | Individual | 6.30% | 657,976 | Apr 7, 2025 | 13D/G |
| Chen Yu | Individual | 6.20% | 1,169,760 | Feb 27, 2026 | 13D/G |
| TCG Crossover Fund III, L.P. | Partnership | 3.10% | 584,878 | Feb 27, 2026 | 13D/G |
| TCG Crossover GP III, LLC | Other | 3.10% | 584,878 | Feb 27, 2026 | 13D/G |
| TCG Crossover GP II, LLC | Other | 3.10% | 584,882 | Feb 27, 2026 | 13D/G |
| TCG Crossover Fund II, L.P. | Partnership | 3.10% | 584,882 | Feb 27, 2026 | 13D/G |
| Polaris Partners IX, L.P. | Partnership | 3.10% | 573,062 | Apr 7, 2025 | 13D/G |
| Polaris Partners GP IX, L.L.C. | Other | 3.10% | 573,062 | Apr 7, 2025 | 13D/G |
| Aberdeen Group plc | Holding company | 2.48% | 484,887 | Oct 29, 2026 | 13D/G |
| abrdn Inc | IA, CO | 2.48% | 484,887 | Oct 29, 2026 | 13D/G |
| Chafen Lu | IN, OO | 1.00% | 186,134 | Apr 7, 2025 | 13D/G |
| Jonathan Flint | Individual | 0.50% | 84,914 | Apr 7, 2025 | 13D/G |
| Polaris Founders Capital Fund II, L.P. | Partnership | 0.30% | 64,652 | Apr 7, 2025 | 13D/G |
| Polaris Founders Capital Fund Management Co. II, L.L.C. | Other | 0.30% | 64,652 | Apr 7, 2025 | 13D/G |
| Polaris Founders Capital Fund I, L.P. | Partnership | 0.10% | 20,262 | Apr 7, 2025 | 13D/G |
| Polaris Founders Capital Fund Management Co. I, L.L.C. | Other | 0.10% | 20,262 | Apr 7, 2025 | 13D/G |
Insider Trades (100)
Last 4 quarters: 602,573 acquired · 55,874 disposed
| Insider | Position | Date | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| REICIN ALISE | director, officer: Chief Executive Officer | Oct 26, 2026 | OPTION EX. | 10,000 | $2.38 | $23.8K | Form 4 |
| REICIN ALISE | director, officer: Chief Executive Officer | Oct 26, 2026 | OPTION EX. | 10,000 | $2.38 | $23.8K | Form 4 |
| Lochner Daniel | Chief Financial Officer | Sep 25, 2026 | TAX W/H | 520 | $23.67 | $12.3K | Form 4 |
| McNamara Peter | Chief Scientific Officer | Sep 25, 2026 | TAX W/H | 444 | $23.67 | $10.5K | Form 4 |
| McNamara Peter | Chief Scientific Officer | Sep 30, 2026 | SELL | 536 | $23.04 | $12.3K | Form 4 |
| Ruddy Marcella K. | Chief Medical Officer | Sep 25, 2026 | TAX W/H | 525 | $23.67 | $12.4K | Form 4 |
| REICIN ALISE | director, officer: Chief Executive Officer | Sep 25, 2026 | TAX W/H | 1,545 | $23.67 | $36.6K | Form 4 |
| Schwabish Marc | Chief Business Officer | Sep 25, 2026 | TAX W/H | 411 | $23.67 | $9.7K | Form 4 |
| Schwabish Marc | Chief Business Officer | Sep 3, 2026 | AWARD | 17,750 | $29.92 | $531.1K | Form 4 |
| McNamara Peter | Chief Scientific Officer | Sep 3, 2026 | AWARD | 21,000 | $29.92 | $628.3K | Form 4 |
| Lochner Daniel | Chief Financial Officer | Sep 3, 2026 | AWARD | 24,250 | $29.92 | $725.6K | Form 4 |
| Ruddy Marcella K. | Chief Medical Officer | Sep 3, 2026 | AWARD | 24,250 | $29.92 | $725.6K | Form 4 |
| REICIN ALISE | director, officer: Chief Executive Officer | Sep 3, 2026 | AWARD | 69,250 | $29.92 | $2.1M | Form 4 |
| McNamara Peter | Chief Scientific Officer | Aug 25, 2026 | OPTION EX. | 43 | $14.71 | $632.53 | Form 4 |
| McNamara Peter | Chief Scientific Officer | Aug 25, 2026 | SELL | 43 | $36.52 | $1.6K | Form 4 |
| McNamara Peter | Chief Scientific Officer | Aug 25, 2026 | OPTION EX. | 43 | $14.71 | $632.53 | Form 4 |
| McNamara Peter | Chief Scientific Officer | Aug 12, 2026 | OPTION EX. | 43 | $14.71 | $632.53 | Form 4 |
| McNamara Peter | Chief Scientific Officer | Aug 12, 2026 | SELL | 43 | $35.00 | $1.5K | Form 4 |
| McNamara Peter | Chief Scientific Officer | Aug 12, 2026 | OPTION EX. | 43 | $14.71 | $632.53 | Form 4 |
| McNamara Peter | Chief Scientific Officer | Jun 30, 2026 | OPTION EX. | 172 | $14.71 | $2.5K | Form 4 |
| McNamara Peter | Chief Scientific Officer | Jun 30, 2026 | SELL | 172 | $35.00 | $6.0K | Form 4 |
| McNamara Peter | Chief Scientific Officer | Jun 30, 2026 | OPTION EX. | 172 | $14.71 | $2.5K | Form 4 |
| REICIN ALISE | director, officer: Chief Executive Officer | Jun 20, 2026 | TAX W/H | 924 | $30.34 | $28.0K | Form 4 |
| Lochner Daniel | Chief Financial Officer | Jun 11, 2026 | AWARD | 7,500 | $16.80 | $126.0K | Form 4 |
| SPRINGER TIMOTHY A | director, 10 percent owner: | Jun 9, 2026 | AWARD | 10,200 | $28.56 | $291.3K | Form 4 |
| Tipirneni Praveen P. | director | Jun 9, 2026 | AWARD | 10,200 | $28.56 | $291.3K | Form 4 |
| Donenberg Phillip B. | director | Jun 9, 2026 | AWARD | 10,200 | $28.56 | $291.3K | Form 4 |
| Vitorovic Stefan | director | Jun 9, 2026 | AWARD | 10,200 | $28.56 | $291.3K | Form 4 |
| Chutter Jessica Caroline | director | Jun 8, 2026 | AWARD | 20,400 | $29.10 | $593.6K | Form 4 |
| Chutter Jessica Caroline | Jun 8, 2026 | OTHER | 0 | — | — | Form 4 | |
| Ruddy Marcella K. | Chief Medical Officer | May 4, 2026 | SELL | 1,065 | $30.00 | $31.9K | Form 4 |
| Ruddy Marcella K. | Chief Medical Officer | Apr 1, 2026 | SELL | 1,000 | $31.05 | $31.1K | Form 4 |
| Nader Francois | director | Apr 1, 2026 | AWARD | 20,400 | $30.78 | $627.9K | Form 4 |
| Nader Francois | Apr 1, 2026 | OTHER | 0 | — | — | Form 4 | |
| Ruddy Marcella K. | Chief Medical Officer | Mar 6, 2026 | SELL | 10,000 | $30.00 | $300.0K | Form 4 |
| McNamara Peter | Chief Scientific Officer | Mar 6, 2026 | OPTION EX. | 215 | $14.71 | $3.2K | Form 4 |
| McNamara Peter | Chief Scientific Officer | Mar 6, 2026 | OPTION EX. | 2,500 | $2.38 | $6.0K | Form 4 |
| McNamara Peter | Chief Scientific Officer | Mar 6, 2026 | SELL | 6,047 | $30.00 | $181.4K | Form 4 |
| McNamara Peter | Chief Scientific Officer | Mar 6, 2026 | SELL | 215 | $35.00 | $7.5K | Form 4 |
| McNamara Peter | Chief Scientific Officer | Mar 6, 2026 | OPTION EX. | 2,500 | $2.38 | $6.0K | Form 4 |
| McNamara Peter | Chief Scientific Officer | Mar 6, 2026 | OPTION EX. | 215 | $14.71 | $3.2K | Form 4 |
| REICIN ALISE | director, officer: Chief Executive Officer | Mar 4, 2026 | AWARD | 76,500 | — | — | Form 4 |
| REICIN ALISE | director, officer: Chief Executive Officer | Mar 4, 2026 | AWARD | 69,250 | $27.41 | $1.9M | Form 4 |
| Schwabish Marc | Chief Business Officer | Mar 4, 2026 | AWARD | 19,500 | — | — | Form 4 |
| Schwabish Marc | Chief Business Officer | Mar 4, 2026 | AWARD | 17,750 | $27.41 | $486.5K | Form 4 |
| McNamara Peter | Chief Scientific Officer | Mar 4, 2026 | AWARD | 23,000 | — | — | Form 4 |
| McNamara Peter | Chief Scientific Officer | Mar 4, 2026 | SELL | 1,650 | $25.00 | $41.3K | Form 4 |
| McNamara Peter | Chief Scientific Officer | Mar 3, 2026 | SELL | 1,649 | $22.06 | $36.4K | Form 4 |
| McNamara Peter | Chief Scientific Officer | Mar 4, 2026 | AWARD | 21,000 | $27.41 | $575.6K | Form 4 |
| Lochner Daniel | Chief Financial Officer | Mar 4, 2026 | AWARD | 26,500 | — | — | Form 4 |
| Lochner Daniel | Chief Financial Officer | Mar 4, 2026 | AWARD | 24,250 | $27.41 | $664.7K | Form 4 |
| Ruddy Marcella K. | Chief Medical Officer | Mar 4, 2026 | AWARD | 26,500 | — | — | Form 4 |
| Ruddy Marcella K. | Chief Medical Officer | Mar 4, 2026 | AWARD | 24,250 | $27.41 | $664.7K | Form 4 |
| REICIN ALISE | director, officer: Chief Executive Officer | Feb 11, 2026 | BUY | 2,500 | $21.10 | $52.8K | Form 4 |
| REICIN ALISE | director, officer: Chief Executive Officer | Feb 11, 2026 | BUY | 2,500 | $21.10 | $52.8K | Form 4 |
| Schwabish Marc | Chief Business Officer | Feb 10, 2026 | OPTION EX. | 4,500 | $2.38 | $10.7K | Form 4 |
| Schwabish Marc | Chief Business Officer | Feb 10, 2026 | OPTION EX. | 4,500 | $2.38 | $10.7K | Form 4 |
| Lochner Daniel | Chief Financial Officer | Feb 10, 2026 | BUY | 6,000 | $21.61 | $129.7K | Form 4 |
| Schwabish Marc | Chief Business Officer | Feb 4, 2026 | TAX W/H | 1,619 | $23.22 | $37.6K | Form 4 |
| Ruddy Marcella K. | Chief Medical Officer | Feb 4, 2026 | TAX W/H | 2,064 | $23.22 | $47.9K | Form 4 |
| REICIN ALISE | director, officer: Chief Executive Officer | Feb 4, 2026 | TAX W/H | 4,104 | $23.22 | $95.3K | Form 4 |
| McNamara Peter | Chief Scientific Officer | Feb 4, 2026 | TAX W/H | 1,748 | $23.22 | $40.6K | Form 4 |
| Lochner Daniel | Chief Financial Officer | Feb 4, 2026 | TAX W/H | 2,077 | $23.22 | $48.2K | Form 4 |
| REICIN ALISE | director, officer: Chief Executive Officer | Dec 31, 2025 | OPTION EX. | 10,966 | $2.38 | $26.1K | Form 4 |
| REICIN ALISE | director, officer: Chief Executive Officer | Dec 31, 2025 | OPTION EX. | 10,966 | $2.38 | $26.1K | Form 4 |
| McNamara Peter | Chief Scientific Officer | Dec 22, 2025 | OPTION EX. | 7,000 | $2.98 | $20.9K | Form 4 |
| McNamara Peter | Chief Scientific Officer | Dec 22, 2025 | OPTION EX. | 7,000 | $2.98 | $20.9K | Form 4 |
| Schwabish Marc | Chief Business Officer | Sep 25, 2025 | AWARD | 4,210 | — | — | Form 4 |
| Schwabish Marc | Chief Business Officer | Sep 25, 2025 | AWARD | 7,650 | $14.71 | $112.5K | Form 4 |
| McNamara Peter | Chief Scientific Officer | Sep 25, 2025 | AWARD | 4,550 | — | — | Form 4 |
| McNamara Peter | Chief Scientific Officer | Sep 25, 2025 | AWARD | 8,260 | $14.71 | $121.5K | Form 4 |
| Lochner Daniel | Chief Financial Officer | Sep 25, 2025 | AWARD | 5,430 | — | — | Form 4 |
| Lochner Daniel | Chief Financial Officer | Sep 25, 2025 | AWARD | 9,860 | $14.71 | $145.0K | Form 4 |
| Ruddy Marcella K. | Chief Medical Officer | Sep 25, 2025 | AWARD | 5,370 | — | — | Form 4 |
| Ruddy Marcella K. | Chief Medical Officer | Sep 25, 2025 | AWARD | 9,750 | $14.71 | $143.4K | Form 4 |
| REICIN ALISE | director, officer: Chief Executive Officer | Sep 25, 2025 | AWARD | 14,700 | — | — | Form 4 |
| REICIN ALISE | director, officer: Chief Executive Officer | Sep 25, 2025 | AWARD | 26,710 | $14.71 | $392.9K | Form 4 |
| REICIN ALISE | director, officer: Chief Executive Officer | Jun 20, 2025 | TAX W/H | 859 | $19.81 | $17.0K | Form 4 |
| Donenberg Phillip B. | director | Jun 9, 2025 | AWARD | 10,200 | $24.48 | $249.7K | Form 4 |
| Vitorovic Stefan | director | Jun 9, 2025 | AWARD | 10,200 | $24.48 | $249.7K | Form 4 |
| MCGUIRE TERRANCE | director | Jun 9, 2025 | AWARD | 10,200 | $24.48 | $249.7K | Form 4 |
| Tipirneni Praveen P. | director | Jun 9, 2025 | AWARD | 10,200 | $24.48 | $249.7K | Form 4 |
| SPRINGER TIMOTHY A | director, 10 percent owner: | Jun 9, 2025 | AWARD | 10,200 | $24.48 | $249.7K | Form 4 |
| SPRINGER TIMOTHY A | director, 10 percent owner: | Apr 11, 2025 | BUY | 9,478 | $16.31 | $154.6K | Form 4 |
| SPRINGER TIMOTHY A | director, 10 percent owner: | Apr 10, 2025 | BUY | 8,092 | $16.73 | $135.4K | Form 4 |
| SPRINGER TIMOTHY A | director, 10 percent owner: | Apr 9, 2025 | BUY | 857 | $15.23 | $13.1K | Form 4 |
| SPRINGER TIMOTHY A | director, 10 percent owner: | Apr 9, 2025 | BUY | 2,861 | $14.62 | $41.8K | Form 4 |
| SPRINGER TIMOTHY A | director, 10 percent owner: | Apr 11, 2025 | BUY | 53,706 | $16.31 | $875.9K | Form 4 |
| SPRINGER TIMOTHY A | director, 10 percent owner: | Apr 10, 2025 | BUY | 45,858 | $16.73 | $767.2K | Form 4 |
| SPRINGER TIMOTHY A | director, 10 percent owner: | Apr 9, 2025 | BUY | 4,856 | $15.23 | $74.0K | Form 4 |
| SPRINGER TIMOTHY A | director, 10 percent owner: | Apr 9, 2025 | BUY | 16,215 | $14.62 | $237.1K | Form 4 |
| SPRINGER TIMOTHY A | director, 10 percent owner: | Apr 7, 2025 | BUY | 87,500 | $17.10 | $1.5M | Form 4 |
| SPRINGER TIMOTHY A | director, 10 percent owner: | Apr 7, 2025 | BUY | 412,500 | $17.10 | $7.1M | Form 4 |
| MCGUIRE TERRANCE | director | Apr 7, 2025 | SELL | 500,000 | $17.10 | $8.6M | Form 4 |
| SPRINGER TIMOTHY A | director, 10 percent owner: | Feb 5, 2025 | BUY | 129,294 | $54.14 | $7.0M | Form 4 |
| SPRINGER TIMOTHY A | director, 10 percent owner: | Feb 5, 2025 | BUY | 660,000 | $50.00 | $33.0M | Form 4 |
| Lochner Daniel | Chief Financial Officer | Feb 5, 2025 | BUY | 4,617 | $54.14 | $250.0K | Form 4 |
| McNamara Peter | Chief Scientific Officer | Feb 4, 2025 | AWARD | 15,141 | — | — | Form 4 |
| McNamara Peter | Chief Scientific Officer | Feb 4, 2025 | AWARD | 27,530 | $48.01 | $1.3M | Form 4 |
| Schwabish Marc | Chief Business Officer | Feb 4, 2025 | AWARD | 25,496 | $48.01 | $1.2M | Form 4 |