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 2 sales; 122 institutions reported holding it in 13F filings for Q2 2026, worth $479.9M in total; no superinvestor holds it.
13F holders, Q4 2025
Institutional positions in Tectonic Therapeutic, Inc. as of Dec 31, 2025. 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
- 105
- +7 vs. Q3 2025
- Shares held
- 13.8M
- +1.71M (+14.1%) vs. Q3 2025
- Total value
- $288.1M
- +$98.2M (+51.7%) vs. Q3 2025
- New holders
- 30
- 35 more added
- Sold out
- 23
- 24 more reduced
1 institution that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2025: 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 2025
Shares, value and share of portfolio for each institution holding Tectonic Therapeutic, Inc.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 854,363 | $17.8M | 0.00% | +26,510+3.2% | Added |
| Baker Bros. Advisors LP | 903,400 | $18.8M | 0.11% | +803,400+803.4% | Added |
| Braidwell LP | 927,524 | $19.3M | 0.62% | +190,657+25.9% | Added |
| Standard Life Aberdeen plc | 1,141,824 | $23.8M | 0.04% | +785,648+220.6% | Added |
| FMR LLC | 2,807,442 | $58.6M | 0.00% | +6610.0% | Added |
| Farallon Capital Management, L.L.C. | 0 | $0 | 0.00% | −640,000−100.0% | Sold out |
| Polygon Management Ltd. | 0 | $0 | 0.00% | −243,728−100.0% | Sold out |
| First Light Asset Management, LLC | 0 | $0 | 0.00% | −202,393−100.0% | Sold out |
| StemPoint Capital LP | 0 | $0 | 0.00% | −188,999−100.0% | Sold out |
| Tang Capital Management LLC | 0 | $0 | 0.00% | −179,166−100.0% | Sold out |
| Ally Bridge Group (NY) LLC | 0 | $0 | 0.00% | −138,595−100.0% | Sold out |
| Superstring Capital Management LP | 0 | $0 | 0.00% | −119,286−100.0% | Sold out |
| Sphera Funds Management Ltd. | 0 | $0 | 0.00% | −115,908−100.0% | Sold out |
| Renaissance Technologies LLC | 0 | $0 | 0.00% | −93,400−100.0% | Sold out |
| Jain Global LLC | 0 | $0 | 0.00% | −71,504−100.0% | Sold out |
| Windmill Hill Asset Management Ltd | 0 | $0 | 0.00% | −40,023−100.0% | Sold out |
| Soleus Capital Management, L.P. | 0 | $0 | 0.00% | −25,000−100.0% | Sold out |
| State of Wisconsin Investment Board | 0 | $0 | 0.00% | −15,559−100.0% | Sold out |
| DLD Asset Management, LP | 0 | $0 | 0.00% | −15,000−100.0% | Sold out |
| Rangeley Capital, LLC | 0 | $0 | 0.00% | −12,000−100.0% | Sold out |
| Engineers Gate Manager LP | 0 | $0 | 0.00% | −11,093−100.0% | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −10,856−100.0% | Sold out |
| Trexquant Investment LP | 0 | $0 | 0.00% | −10,662−100.0% | Sold out |
| Caitong International Asset Management Co., Ltd | 0 | $0 | 0.00% | −3,966−100.0% | Sold out |
| Rise Advisors, LLC | 0 | $0 | 0.00% | −28−100.0% | Sold out |
| SRS Capital Advisors, Inc. | 0 | $0 | 0.00% | −15−100.0% | Sold out |
| National Bank of Canada | 0 | $0 | 0.00% | −8−100.0% | Sold out |
| SBI Securities Co., Ltd. | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| Point72 (DIFC) Ltd | – | – | – | – | Not filed |