Tectonic Therapeutic, Inc.
TECX- Exchange
- Nasdaq
- Industry
- Biological Products, (No Diagnostic Substances)
- SEC CIK
- 0001681087
In the last 90 days, Tectonic Therapeutic, Inc. insiders filed 0 open-market purchases and 3 sales; 122 institutions reported holding it in 13F filings for Q2 2026, worth $479.9M in total; no superinvestor holds it.
13F holders, Q4 2023
Institutional positions in Tectonic Therapeutic, Inc. as of Dec 31, 2023. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 45
- −2 vs. Q3 2023
- Shares held
- 23.7M
- −1.64M (−6.5%) vs. Q3 2023
- Total value
- $32.2M
- −$6.79M (−17.4%) vs. Q3 2023
- New holders
- 4
- 14 more added
- Sold out
- 6
- 12 more reduced
1 institution that held it in Q3 2023 haven't filed for Q4 2023 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2023: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting TECX on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 122 | $479.9M |
| Q1 2026 | 111 | $426.8M |
| Q4 2025 | 105 | $288.1M |
| Q3 2025 | 99 | $189.9M |
| Q2 2025 | 82 | $240.7M |
| Q1 2025 | 78 | $198.8M |
| Q4 2024 | 70 | $354.9M |
| Q3 2024 | 53 | $217.4M |
| Q2 2024 | 40 | $88.1M |
| Q1 2024 | 47 | $35.2M |
| Q4 2023 | 45 | $32.2M |
| Q3 2023 | 48 | $39.9M |
| Q2 2023 | 41 | $18.9M |
| Q1 2023 | 48 | $22.8M |
| Q4 2022 | 45 | $14.8M |
| Q3 2022 | 54 | $15.7M |
| Q2 2022 | 64 | $23.8M |
| Q1 2022 | 81 | $38.8M |
| Q4 2021 | 94 | $134.9M |
| Q3 2021 | 101 | $166.5M |
| Q2 2021 | 97 | $287.7M |
| Q1 2021 | 99 | $423.5M |
Institutions, Q4 2023
Shares, value and share of portfolio for each institution holding Tectonic Therapeutic, Inc.; share changes are against Q3 2023.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Atlas Venture Life Science Advisors, LLC | 4,541,381 | $6.18M | 0.74% | 00.0% | Unchanged |
| BML Capital Management, LLC | 4,001,627 | $5.44M | 4.30% | 00.0% | Unchanged |
| Newtyn Management, LLC | 2,734,175 | $3.72M | 0.73% | +734,175+36.7% | Added |
| Vanguard Group Inc | 1,601,834 | $2.18M | 0.00% | +27,000+1.7% | Added |
| Acadian Asset Management LLC | 1,454,264 | $1.98M | 0.01% | −270,825−15.7% | Reduced |
| Aisling Capital Management LP | 1,009,779 | $1.37M | 0.41% | 00.0% | Unchanged |
| Renaissance Technologies LLC | 758,943 | $1.03M | 0.00% | +240,476+46.4% | Added |
| Ikarian Capital, LLC | 718,259 | $976.8K | 0.27% | 00.0% | Unchanged |
| Vazirani Asset Management LLC | 650,000 | $884.0K | 3.82% | +181,727+38.8% | Added |
| Morgan Stanley | 628,259 | $854.4K | 0.00% | +107,060+20.5% | Added |
| BlackRock Inc. | 614,708 | $836.0K | 0.00% | −7,845−1.3% | Reduced |
| Citadel Advisors LLC | 515,216 | $700.7K | 0.00% | +5,233+1.0% | Added |
| Affinity Asset Advisors, LLC | 500,000 | $680.0K | 0.14% | 00.0% | Unchanged |
| Aldebaran Capital, LLC | 454,986 | $618.8K | 0.63% | −15,144−3.2% | Reduced |
| FNY Investment Advisers, LLC | 400,000 | $544.0K | 0.61% | +175,000+77.8% | Added |
| Geode Capital Management, LLC | 366,516 | $498.6K | 0.00% | +13,400+3.8% | Added |
| Gabelli & Co Investment Advisers, Inc. | 353,000 | $480.1K | 0.09% | +353,000 | New |
| Gabelli Funds LLC | 343,421 | $467.1K | 0.00% | +343,421 | New |
| Western Standard LLC | 312,912 | $425.6K | 0.40% | +2,551+0.8% | Added |
| Two Sigma Investments, LP | 309,516 | $420.9K | 0.00% | −18,399−5.6% | Reduced |
| Two Sigma Advisers, LP | 265,100 | $360.5K | 0.00% | +28,500+12.0% | Added |
| Bridgeway Capital Management, LLC | 239,987 | $326.4K | 0.01% | +92,587+62.8% | Added |
| JBF Capital, Inc. | 160,000 | $217.6K | 0.04% | 00.0% | Unchanged |
| Boothbay Fund Management, LLC | 154,833 | $210.6K | 0.01% | 00.0% | Unchanged |
| State Street Corp | 140,852 | $191.6K | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 134,454 | $182.9K | 0.00% | −14,153−9.5% | Reduced |
| Northern Trust Corp | 67,530 | $91.8K | 0.00% | −6,923−9.3% | Reduced |
| BBR Partners, LLC | 60,000 | $81.6K | 0.01% | 00.0% | Unchanged |
| XTX Topco Ltd | 54,953 | $74.7K | 0.02% | +25,846+88.8% | Added |
| ADAR1 Capital Management, LLC | 50,147 | $68.2K | 0.03% | +50,147 | New |
| Barclays PLC | 17,306 | $23.5K | 0.00% | 00.0% | Unchanged |
| Bank of New York Mellon Corp | 16,788 | $22.8K | 0.00% | 00.0% | Unchanged |
| Colonial River Wealth Management, LLC | 16,177 | $22.0K | 0.01% | −498−3.0% | Reduced |
| Commonwealth Equity Services, LLC | 11,000 | $15.0K | 0.00% | −320−2.8% | Reduced |
| Virtu Financial LLC | 10,048 | $14.0K | 0.00% | −25,802−72.0% | Reduced |
| Advisor Group Holdings, Inc. | 8,000 | $10.9K | 0.00% | +5,000+166.7% | Added |
| CWM, LLC | 6,388 | $9.00K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 3,782 | $5.14K | 0.00% | −1,416−27.2% | Reduced |
| BNP Paribas Arbitrage, SA | 2,994 | $4.07K | 0.00% | 00.0% | Unchanged |
| Royal Bank of Canada | 1,893 | $3.00K | 0.00% | −86−4.3% | Reduced |
| Rhumbline Advisers | 1,208 | $1.64K | 0.00% | 00.0% | Unchanged |
| National Bank of Canada | 380 | $543 | 0.00% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 282 | $384 | 0.00% | −83,538−99.7% | Reduced |
| Bank of America Corp | 30 | $40 | 0.00% | +28+1,400.0% | Added |
| Group One Trading, L.P. | 13 | $18 | 0.00% | +13 | New |
| Tang Capital Management LLC | 0 | $0 | 0.00% | −3,512,686−100.0% | Sold out |
| Millennium Management LLC | 0 | $0 | 0.00% | −35,872−100.0% | Sold out |
| Private Advisor Group, LLC | 0 | $0 | 0.00% | −21,410−100.0% | Sold out |
| UBS Group AG | 0 | $0 | 0.00% | −9,876−100.0% | Sold out |
| IFP Advisors, Inc | 0 | $0 | 0.00% | −3,500−100.0% | Sold out |
| Citigroup Inc | 0 | $0 | 0.00% | −215−100.0% | Sold out |
| Terrapin Asset Management, LLC | – | – | – | – | Not filed |