TECTONIC THERAPEUTIC INC (TECX) Institutional Ownership Changes & 13F Activity
TECTONIC THERAPEUTIC INC (TECX). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Braidwell Lp, First Light Asset Management, Llc, Ameriprise Financial Inc, Price T Rowe Associates Inc, and Millennium Management Llc.
| Institution | Type | Change in shares | Change Position % | Shares | Reported stock balance | Portfolio quarter | Filing date |
|---|---|---|---|---|---|---|---|
| Manufacturers Life Insurance Company, The | Sell | -7,933 | -57.0% | 5,996 | $206.11K | Q2 2026 | Sep 09, 2026 |
| Citadel Advisors Llc | Buy | +90,393 | — | 90,393 | $3.11M | Q2 2026 | Sep 02, 2026 |
| California State Teachers Retirement System | Sell | -454 | -76.3% | 141 | $4.85K | Q2 2026 | Aug 24, 2026 |
| Braidwell Lp | Sell | -250,251 | -29.5% | 596,900 | $20.52M | Q2 2026 | Aug 14, 2026 |
| First Light Asset Management, Llc | Buy | +152,983 | +23.6% | 800,726 | $27.52M | Q2 2026 | Aug 14, 2026 |
| Ameriprise Financial Inc | Buy | +142,448 | — | 142,448 | $4.90M | Q2 2026 | Aug 14, 2026 |
| Price T Rowe Associates Inc | Sell | -116,054 | -70.7% | 48,001 | $1.65M | Q2 2026 | Aug 14, 2026 |
| Millennium Management Llc | Buy | +107,177 | +183.7% | 165,525 | $5.69M | Q2 2026 | Aug 14, 2026 |
| Vestal Point Capital, Lp | Buy | +97,000 | +29.6% | 425,000 | $14.61M | Q2 2026 | Aug 14, 2026 |
| D. E. Shaw & Co., Inc. | Buy | +70,430 | +60.7% | 186,550 | $6.41M | Q2 2026 | Aug 14, 2026 |
| Jane Street Group, Llc | Buy | +65,821 | — | 65,821 | $2.26M | Q2 2026 | Aug 14, 2026 |
| Sectoral Asset Management Inc | Buy | +51,950 | +272.6% | 71,009 | $2.44M | Q2 2026 | Aug 14, 2026 |
| Exoduspoint Capital Management, Lp | Sell | -48,440 | -57.9% | 35,239 | $1.21M | Q2 2026 | Aug 14, 2026 |
| Ikarian Capital, Llc | Buy | +48,300 | +30.7% | 205,837 | $7.08M | Q2 2026 | Aug 14, 2026 |
| Hrt Financial Lp | Buy | +44,540 | — | 44,540 | $1.53M | Q2 2026 | Aug 14, 2026 |
| Prosight Management, Lp | Sell | -40,141 | -50.3% | 39,731 | $1.37M | Q2 2026 | Aug 14, 2026 |
| Trexquant Investment Lp | Buy | +36,991 | — | 36,991 | $1.27M | Q2 2026 | Aug 14, 2026 |
| Sei Investments Co | Sell | -19,841 | -53.8% | 17,029 | $585.37K | Q2 2026 | Aug 14, 2026 |
| Squarepoint Ops Llc | Sell | -19,391 | -11.8% | 145,028 | $4.99M | Q2 2026 | Aug 14, 2026 |
| Boothbay Fund Management, Llc | Buy | +14,634 | +31.7% | 60,771 | $2.09M | Q2 2026 | Aug 14, 2026 |
| Goldman Sachs Group Inc | Buy | +11,498 | +18.4% | 73,924 | $2.54M | Q2 2026 | Aug 14, 2026 |
| Aqr Capital Management Llc | Sell | -10,317 | -60.9% | 6,617 | $227.46K | Q2 2026 | Aug 14, 2026 |
| Brevan Howard Capital Management Lp | Buy | +9,573 | — | 9,573 | $329.07K | Q2 2026 | Aug 14, 2026 |
| Raymond James Financial Inc | Buy | +8,478 | +13.2% | 72,674 | $2.50M | Q2 2026 | Aug 14, 2026 |
| Alliancebernstein L.P. | Buy | +7,460 | — | 7,460 | $230.59K | Q2 2026 | Aug 14, 2026 |
| Invesco Ltd. | Buy | +6,388 | — | 6,388 | $219.59K | Q2 2026 | Aug 14, 2026 |
| Rangeley Capital, Llc | Buy | +6,000 | — | 6,000 | $206.25K | Q2 2026 | Aug 14, 2026 |
| Velan Capital Investment Management Lp | Buy | +6,000 | — | 6,000 | $206.25K | Q2 2026 | Aug 14, 2026 |
| Wells Fargo & Company/Mn | Buy | +4,764 | +4.2% | 117,428 | $4.04M | Q2 2026 | Aug 14, 2026 |
| Kennedy Capital Management Llc | Sell | -4,480 | -1.6% | 282,202 | $9.70M | Q2 2026 | Aug 14, 2026 |
Frequently asked questions about TECX activity
Which institutional owners are buying TECX?
Institutional owners buying TECX include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.
What does "buy" mean in TECX activity?
"Buy" means an investor increased their reported position in TECX compared to the prior reporting period. This reflects growing exposure to TECTONIC THERAPEUTIC INC (TECX) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in TECX increasing?
Institutional interest in TECX can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.
Related TECX Institutional Insights
- TECX Overview
- TECX 13F Institutional Holders
- TECX Top Institutional Shareholders
- Healthcare Sector Institutional Ownership
- Healthcare Sector Portfolio Overlap
- Institutional Portfolio Overlap & Shared Holdings
- Most Bought Healthcare Stocks By Institutional Investors
- Most Sold Healthcare Stocks By Institutional Investors
- TECX Insider Trading & SEC Form 4 Activity
- TECX Articles
- Top Institutional Investor Stock Rankings