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, Q3 2025
Institutional positions in Tectonic Therapeutic, Inc. as of Sep 30, 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
- 99
- +17 vs. Q2 2025
- Shares held
- 12.1M
- −7.63K (−0.1%) vs. Q2 2025
- Total value
- $189.9M
- −$50.8M (−21.1%) vs. Q2 2025
- New holders
- 28
- 29 more added
- Sold out
- 11
- 21 more reduced
Compare with Q2 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, Q3 2025
Shares, value and share of portfolio for each institution holding Tectonic Therapeutic, Inc.; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| EcoR1 Capital, LLC | 0 | $0 | 0.00% | −935,121−100.0% | Sold out |
| Ikarian Capital, LLC | 0 | $0 | 0.00% | −163,696−100.0% | Sold out |
| Boothbay Fund Management, LLC | 0 | $0 | 0.00% | −45,077−100.0% | Sold out |
| Dimensional Fund Advisors LP | 0 | $0 | 0.00% | −19,498−100.0% | Sold out |
| Susquehanna International Group, LLP | 0 | $0 | 0.00% | −18,707−100.0% | Sold out |
| Price T Rowe Associates Inc | 0 | $0 | 0.00% | −18,322−100.0% | Sold out |
| Bridgeway Capital Management, LLC | 0 | $0 | 0.00% | −12,383−100.0% | Sold out |
| Monaco Asset Management SAM | 0 | $0 | 0.00% | −10,500−100.0% | Sold out |
| Deutsche Bank AG | 0 | $0 | 0.00% | −8,201−100.0% | Sold out |
| Allworth Financial LP | 0 | $0 | 0.00% | −26−100.0% | Sold out |