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, Q1 2026
Institutional positions in Tectonic Therapeutic, Inc. as of Mar 31, 2026. 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
- 111
- +9 vs. Q4 2025
- Shares held
- 13.8M
- +687.1K (+5.2%) vs. Q4 2025
- Total value
- $426.8M
- +$153.1M (+55.9%) vs. Q4 2025
- New holders
- 29
- 33 more added
- Sold out
- 20
- 37 more reduced
3 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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, Q1 2026
Shares, value and share of portfolio for each institution holding Tectonic Therapeutic, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Bollard Group LLC | 302,953 | $9.36M | 0.29% | 00.0% | Unchanged |
| Vestal Point Capital, LP | 328,000 | $10.1M | 0.28% | 00.0% | Unchanged |
| Vanguard Capital Management LLC | 473,532 | $14.6M | 0.00% | +473,532 | New |
| 5AM Venture Management, LLC | 606,660 | $18.8M | 5.21% | 00.0% | Unchanged |
| Baker Bros. Advisors LP | 607,788 | $18.8M | 0.11% | −295,612−32.7% | Reduced |
| First Light Asset Management, LLC | 647,743 | $20.0M | 1.79% | +647,743 | New |
| Braidwell LP | 847,151 | $26.2M | 0.87% | −80,373−8.7% | Reduced |
| BlackRock, Inc. | 860,352 | $26.6M | 0.00% | +5,989+0.7% | Added |
| Standard Life Aberdeen plc | 1,141,824 | $35.3M | 0.06% | 00.0% | Unchanged |
| TCG Crossover Management, LLC | 1,204,891 | $37.2M | 1.07% | +1,204,891 | New |
| FMR LLC | 2,816,494 | $87.1M | 0.00% | +9,052+0.3% | Added |
| Citadel Advisors LLC | 0 | $0 | 0.00% | −317,617−100.0% | Sold out |
| Pale Fire Capital SE | 0 | $0 | 0.00% | −261,026−100.0% | Sold out |
| Knott David M Jr | 0 | $0 | 0.00% | −74,000−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −39,109−100.0% | Sold out |
| BIT Capital GmbH | 0 | $0 | 0.00% | −30,000−100.0% | Sold out |
| Aquatic Capital Management LLC | 0 | $0 | 0.00% | −22,262−100.0% | Sold out |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −19,321−100.0% | Sold out |
| Quest Partners LLC | 0 | $0 | 0.00% | −18,187−100.0% | Sold out |
| Palumbo Wealth Management LLC | 0 | $0 | 0.00% | −13,046−100.0% | Sold out |
| Marex Group plc | 0 | $0 | 0.00% | −12,501−100.0% | Sold out |
| Quadrature Capital Ltd | 0 | $0 | 0.00% | −10,014−100.0% | Sold out |
| Canada Pension Plan Investment Board | 0 | $0 | 0.00% | −6,300−100.0% | Sold out |
| Los Angeles Capital Management LLC | 0 | $0 | 0.00% | −6,410−100.0% | Sold out |
| Group One Trading, L.P. | 0 | $0 | 0.00% | −541−100.0% | Sold out |
| Royal Bank of Canada | 0 | $0 | 0.00% | −521−100.0% | Sold out |
| Amalgamated Bank | 0 | $0 | 0.00% | −345−100.0% | Sold out |
| Vermillion & White Wealth Management Group, LLC | 0 | $0 | 0.00% | −107−100.0% | Sold out |
| Daiwa Securities Group Inc. | 0 | $0 | 0.00% | −80−100.0% | Sold out |
| Optima Capital LLC | 0 | $0 | 0.00% | −31−100.0% | Sold out |
| Advisor Group Holdings, Inc. | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| Vanguard Group Inc | – | – | – | – | Not filed |
| Kotler Kevin | – | – | – | – | Not filed |
| Clarius Group, LLC | – | – | – | – | Not filed |