Tectonic TherapeuticTECX
13F holders, Q2 2026 (June 30)122holders +11
24new positions
11sold out
5famous investors
$34.37avg. 13F price*
At the end of Q2 2026, 122 institutions reported holding Tectonic Therapeutic Inc. (TECX) in their 13F filings, up 11 from Q1 2026. 24 opened new positions and 11 sold out. The largest holders were FMR LLC ($97.3M), TCG Crossover Management, LLC ($41.4M) and Aberdeen Group plc ($39.3M). 5 famous investors held it, including David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio), Israel Englander (0.0% of Millennium Management's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Tectonic Therapeutic Inc.
- CUSIP
- 878972108
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2026 → Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 24 | $11.1M |
| Exits | 11 | $7.5M |
All 13F filers, Q1 2026 → Q2 2026: 1,046,078 shares bought and 890,862 shares sold, net +155,216 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 122 holders
| FMR LLC | 0.00% | Add +0.5% | 2,830,378 | $97.3M |
| TCG Crossover Management, LLC | 1.00% | No change | 1,204,891 | $41.4M |
| Aberdeen Group plc | 0.06% | No change | 1,141,824 | $39.3M |
| BlackRock, Inc. | 0.00% | Add +0.3% | 862,592 | $29.7M |
| First Light Asset Management, LLC | 1.67% | Add +23.6% | 800,726 | $27.5M |
| Baker Bros. Advisors LP | 0.11% | No change | 607,788 | $20.9M |
| 5AM Venture Management, LLC | 7.24% | No change | 606,660 | $20.9M |
| Braidwell LP | 0.79% | Reduce -29.5% | 596,900 | $20.5M |
| Vanguard Capital Management LLC | 0.00% | Add +3.2% | 488,805 | $16.8M |
| Vestal Point Capital, LP | 0.34% | Add +29.6% | 425,000 | $14.6M |
| Bollard Group LLC | 0.32% | No change | 302,953 | $10.4M |
| Kennedy Capital Management LLC | 0.17% | Reduce -1.6% | 282,202 | $9.7M |
| Geode Capital Management, LLC | 0.00% | Add +0.8% | 270,461 | $9.3M |
| Orbimed Advisors LLC | 0.15% | No change | 226,600 | $7.8M |
| State Street Corp. | 0.00% | Add +3.0% | 219,908 | $7.6M |
| Ikarian Capital, LLC | 1.16% | Add +30.7% | 205,837 | $7.1M |
| D. E. Shaw & Co. | 0.00% | Add +60.6% | 186,550 | $6.4M |
| Marshall Wace, LLP | 0.01% | Reduce -25.0% | 172,101 | $5.9M |
| Millennium Management | 0.00% | Add +183.7% | 165,525 | $5.7M |
| Squarepoint Ops LLC | 0.01% | Reduce -11.8% | 145,028 | $5.0M |
| Ameriprise Financial Inc. | 0.00% | Reduce -0.7% | 142,448 | $4.9M |
| Wells Fargo & Company | 0.00% | Add +4.2% | 117,428 | $4.0M |
| Northern Trust Corp. | 0.00% | Add +45.4% | 113,904 | $3.9M |
| Soleus Capital Management, L.P. | 0.12% | Reduce -16.4% | 101,684 | $3.5M |
| Woodline Partners LP | 0.01% | No change | 100,000 | $3.4M |
| Vanguard Portfolio Management LLC | 0.00% | Add +48.4% | 94,414 | $3.2M |
| Citadel Advisors | 0.00% | New | 90,393 | $3.1M |
| Goldman Sachs Group Inc. | 0.00% | Add +18.4% | 73,924 | $2.5M |
| Raymond James Financial Inc. | 0.00% | Add +13.2% | 72,674 | $2.5M |
| Sectoral Asset Management Inc. | 1.70% | Add +272.6% | 71,009 | $2.4M |
| Vanguard Fiduciary Trust Co. | 0.00% | Add +0.7% | 68,394 | $2.4M |
| Jane Street Group, LLC | 0.00% | New | 65,821 | $2.3M |
| Morgan Stanley | 0.00% | Add +0.8% | 65,373 | $2.2M |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | Reduce -3.1% | 64,940 | $2.2M |
| Boothbay Fund Management, LLC | 0.04% | Add +31.7% | 60,771 | $2.1M |
| JPMorgan Chase & Co. | 0.00% | Reduce -6.0% | 55,364 | $1.8M |
| T. Rowe Price Associates Inc. | 0.00% | Reduce -70.7% | 48,001 | $1.7M |
| Tetragon Partners GP Ltd | 0.26% | Add +23.8% | 46,516 | $1.6M |
| PFM Health Sciences, LP | 0.14% | Reduce -1.1% | 45,631 | $1.6M |
| HRT Financial LP | 0.00% | New | 44,540 | $1.5M |
| Jump Financial, LLC | 0.01% | Add +0.7% | 43,400 | $1.5M |
| Prosight Management, LP | 0.24% | Reduce -50.3% | 39,731 | $1.4M |
| Trexquant Investment LP | 0.01% | New | 36,991 | $1.3M |
| Aldebaran Capital, LLC | 0.95% | Reduce -1.0% | 36,797 | $1.3M |
| ExodusPoint Capital Management, LP | 0.01% | Reduce -57.9% | 35,239 | $1.2M |
| Wellington Management Group LLP | 0.00% | Add +7.5% | 31,432 | $1.1M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +4.6% | 30,438 | $1.0M |
| Monimus Capital Management, LP | 0.25% | Add +5.2% | 28,143 | $967K |
| Bank of New York Mellon Corp | 0.00% | Add +2.0% | 25,247 | $868K |
| Alps Advisors Inc. | 0.00% | Add +25.3% | 19,147 | $658K |
| Fisher Asset Management | 0.00% | New | 19,122 | $657K |
| American Century Companies Inc. | 0.00% | Add +51.6% | 19,001 | $653K |
| Quadrature Capital Ltd | 0.01% | New | 18,067 | $621K |
| Sei Investments Co. | 0.00% | Reduce -53.8% | 17,029 | $585K |
| Clearstead Advisors, LLC | 0.01% | Reduce -37.9% | 16,630 | $572K |
| UBS Group AG | 0.00% | Reduce -49.8% | 15,055 | $518K |
| ADAR1 Capital Management, LLC | 0.02% | Add +11.5% | 14,501 | $498K |
| Rhumbline Advisers | 0.00% | Reduce -1.8% | 13,773 | $473K |
| Nuveen, LLC | 0.00% | Add +12.3% | 13,514 | $465K |
| Bank of America Corp. | 0.00% | Reduce -3.7% | 11,043 | $380K |
| Virtus Investment Advisers, LLC | 0.09% | Reduce -21.7% | 10,806 | $371K |
| Dimensional Fund Advisors LP | 0.00% | Add +3.6% | 10,443 | $359K |
| Deutsche Bank AG | 0.00% | Add +7.4% | 10,039 | $345K |
| Brevan Howard Capital Management LP | 0.00% | New | 9,573 | $329K |
| Barclays PLC | 0.00% | Add +36.1% | 9,128 | $314K |
| Creative Planning | 0.00% | Reduce -28.0% | 8,961 | $308K |
| Fox Run Management, L.L.C. | 0.05% | New | 8,865 | $305K |
| Vanguard Global Advisers, LLC | 0.00% | Add +121.1% | 8,765 | $301K |
| Gsa Capital Partners LLP | 0.02% | Reduce -56.1% | 8,275 | $284K |
| AlphaCentric Advisors LLC | 0.20% | Add +1.4% | 6,948 | $239K |
| MetLife Investment Management, LLC | 0.00% | No change | 6,724 | $231K |
| Alliancebernstein L.P. | 0.00% | New | 7,460 | $231K |
| AQR Capital Management | 0.00% | Reduce -60.9% | 6,617 | $227K |
| Invesco Ltd. | 0.00% | Reduce -16.8% | 6,388 | $220K |
| State Board of Administration of Florida Retirement System | 0.00% | New | 6,060 | $208K |
| Rangeley Capital, LLC | 0.20% | New | 6,000 | $206K |
| Velan Capital Investment Management LP | 0.13% | New | 6,000 | $206K |
| Manufacturers Life Insurance Company, The | 0.00% | Reduce -57.0% | 5,996 | $206K |
| Russell Investments Group, Ltd. | 0.00% | Add +554.2% | 5,567 | $191K |
| Citigroup Inc. | 0.00% | Add +383.7% | 5,548 | $191K |
| China Universal Asset Management Co., Ltd. | 0.01% | Reduce -13.1% | 5,503 | $189K |
| Nisa Investment Advisors, LLC | 0.00% | Add +8.0% | 5,400 | $186K |
| BNP Paribas Financial Markets | 0.00% | Add +82.7% | 5,146 | $177K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Reduce -10.0% | 4,694 | $161K |
| New York State Common Retirement Fund | 0.00% | No change | 4,600 | $158K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | No change | 2,638 | $91K |
| Quantbot Technologies LP | 0.00% | New | 1,819 | $63K |
| Ameritas Investment Partners, Inc. | 0.00% | No change | 1,122 | $39K |
| US Bancorp \de | 0.00% | Reduce -4.9% | 1,080 | $37K |
| Legal & General Group Plc | 0.00% | No change | 1,000 | $34K |
| Mirae Asset Global Investments Co., Ltd. | 0.00% | Reduce -13.8% | 844 | $29K |
| Chung Wu Investment Group, LLC | 0.02% | New | 800 | $28K |
| Arax Advisory Partners | 0.00% | New | 725 | $25K |
| Tower Research Capital LLC (TRC) | 0.00% | Reduce -27.7% | 661 | $23K |
| State of Wyoming | 0.00% | New | 601 | $21K |
| HighMark Wealth Management LLC | 0.01% | No change | 587 | $20K |
| Simplex Trading, LLC | 0.00% | Reduce -67.5% | 439 | $15K |
| GF Fund Management Co. LTD. | 0.00% | Reduce -3.6% | 400 | $14K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | No change | 382 | $13K |
| Rockefeller Capital Management L.P. | 0.00% | No change | 370 | $13K |
"% of holder's portfolio" is TECX's weight in each manager's 13F, not the share of Tectonic Therapeutic Inc. the manager owns.