TECX Institutional Ownership & Shareholders
TECTONIC THERAPEUTIC INC (TECX) is currently held by 122 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $479.69M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Fmr Llc is currently the largest disclosed institutional shareholder of TECX tracked by InsiderSet, reporting ownership valued at approximately $97.29M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $66.03M, representing an estimated loss of -32.13% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 69% of the total disclosed TECX value among the investors covered in this analysis. Major shareholders include Fmr Llc, Tcg Crossover Management, Llc, Aberdeen Group Plc, and several other long-term asset managers with concentrated positions in TECTONIC THERAPEUTIC INC (TECX).
This page ranks the largest institutional TECX shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
122
Total Reported Value
$479.69M
Largest Holder
Fmr Llc
Largest Position
$97.29M
Insider Transactions (90d)
8
Latest Filing Quarter
Q2 2026
New Institutional Positions
0
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Fmr Llc | 0.00% | 2,830,378 | $97,294,233 | $66,032,719 | -$31,261,514 | -32.13% | |
| Tcg Crossover Management, Llc | 1.00% | 1,204,891 | $41,418,128 | $28,110,107 | -$13,308,021 | -32.13% | |
| Aberdeen Group Plc | 0.06% | 1,141,824 | $39,250,200 | $26,638,754 | -$12,611,446 | -32.13% | |
| Blackrock, Inc. | 0.00% | 862,592 | $29,651,600 | $20,124,271 | -$9,527,329 | -32.13% | |
| First Light Asset Management, Llc | 1.67% | 800,726 | $27,524,958 | $18,680,938 | -$8,844,020 | -32.13% | |
| Baker Bros. Advisors Lp | 0.10% | 607,788 | $20,892,713 | $14,179,694 | -$6,713,019 | -32.13% | |
| 5Am Venture Management, Llc | 7.24% | 606,660 | $20,853,938 | $14,153,378 | -$6,700,560 | -32.13% | |
| Braidwell Lp | 0.76% | 596,900 | $20,518,438 | $13,925,677 | -$6,592,761 | -32.13% | |
| Vanguard Capital Management Llc | 0.00% | 488,805 | $16,802,672 | $11,403,821 | -$5,398,851 | -32.13% | |
| Vestal Point Capital, Lp | 0.34% | 425,000 | $14,609,375 | $9,915,250 | -$4,694,125 | -32.13% | |
| Bollard Group Llc | 0.32% | 302,953 | $10,414,000 | $7,067,893 | -$3,346,107 | -32.13% | |
| Kennedy Capital Management Llc | 0.17% | 282,202 | $9,700,694 | $6,583,773 | -$3,116,921 | -32.13% | |
| Geode Capital Management, Llc | 0.00% | 270,461 | $9,299,108 | $6,309,855 | -$2,989,253 | -32.15% | |
| Orbimed Advisors Llc | 0.15% | 226,600 | $7,789,375 | $5,286,578 | -$2,502,797 | -32.13% | |
| State Street Corp | 0.00% | 219,908 | $7,559,338 | $5,130,454 | -$2,428,884 | -32.13% | |
| Ikarian Capital, Llc | 1.16% | 205,837 | $7,075,647 | $4,802,177 | -$2,273,470 | -32.13% | |
| D. E. Shaw & Co., Inc. | 0.00% | 186,550 | $6,412,656 | $4,352,212 | -$2,060,445 | -32.13% | |
| Marshall Wace, Llp | 0.00% | 172,101 | $5,916,833 | $4,015,116 | -$1,901,717 | -32.14% | |
| Millennium Management Llc | 0.00% | 165,525 | $5,689,922 | $3,861,698 | -$1,828,224 | -32.13% | |
| Squarepoint Ops Llc | 0.01% | 145,028 | $4,985,338 | $3,383,503 | -$1,601,835 | -32.13% | |
| Ameriprise Financial Inc | 0.00% | 142,448 | $4,896,673 | $3,323,312 | -$1,573,361 | -32.13% | |
| Wells Fargo & Company/Mn | 0.00% | 117,428 | $4,036,588 | $2,739,595 | -$1,296,993 | -32.13% | |
| Northern Trust Corp | 0.00% | 113,904 | $3,915,450 | $2,657,380 | -$1,258,070 | -32.13% | |
| Soleus Capital Management, L.P. | 0.12% | 101,684 | $3,495,388 | $2,372,288 | -$1,123,100 | -32.13% | |
| Woodline Partners Lp | 0.01% | 100,000 | $3,437,500 | $2,333,000 | -$1,104,500 | -32.13% | |
| Vanguard Portfolio Management Llc | 0.00% | 94,414 | $3,245,481 | $2,202,679 | -$1,042,802 | -32.13% | |
| Citadel Advisors Llc | 0.00% | 90,393 | $3,107,260 | $2,108,869 | -$998,391 | -32.13% | |
| Goldman Sachs Group Inc | 0.00% | 73,924 | $2,541,138 | $1,724,647 | -$816,491 | -32.13% | |
| Raymond James Financial Inc | 0.00% | 72,674 | $2,498,169 | $1,695,484 | -$802,685 | -32.13% | |
| Sectoral Asset Management Inc | 1.70% | 71,009 | $2,440,934 | $1,656,640 | -$784,294 | -32.13% | |
| Vanguard Fiduciary Trust Co | 0.00% | 68,394 | $2,351,044 | $1,595,632 | -$755,412 | -32.13% | |
| Jane Street Group, Llc | 0.00% | 65,821 | $2,262,596 | $1,535,604 | -$726,992 | -32.13% | |
| Morgan Stanley | 0.00% | 65,373 | $2,247,205 | $1,525,152 | -$722,053 | -32.13% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | 64,940 | $2,232,313 | $1,515,050 | -$717,263 | -32.13% | |
| Boothbay Fund Management, Llc | 0.04% | 60,771 | $2,089,003 | $1,417,787 | -$671,216 | -32.13% | |
| Jpmorgan Chase & Co | 0.00% | 55,364 | $1,831,995 | $1,291,642 | -$540,353 | -29.50% | |
| Price T Rowe Associates Inc | 0.00% | 48,001 | $1,651,000 | $1,119,863 | -$531,137 | -32.17% | |
| Tetragon Partners Gp Ltd | 0.26% | 46,516 | $1,598,988 | $1,085,218 | -$513,770 | -32.13% | |
| Pfm Health Sciences, Lp | 0.14% | 45,631 | $1,568,566 | $1,064,571 | -$503,995 | -32.13% | |
| Hrt Financial Lp | 0.00% | 44,540 | $1,531,000 | $1,039,118 | -$491,882 | -32.13% | |
| Jump Financial, Llc | 0.01% | 43,400 | $1,491,875 | $1,012,522 | -$479,353 | -32.13% | |
| Prosight Management, Lp | 0.24% | 39,731 | $1,365,753 | $926,924 | -$438,829 | -32.13% | |
| Trexquant Investment Lp | 0.01% | 36,991 | $1,271,566 | $863,000 | -$408,566 | -32.13% | |
| Aldebaran Capital, Llc | 0.95% | 36,797 | $1,264,897 | $858,474 | -$406,423 | -32.13% | |
| Exoduspoint Capital Management, Lp | 0.01% | 35,239 | $1,211,341 | $822,126 | -$389,215 | -32.13% | |
| Wellington Management Group Llp | 0.00% | 31,432 | $1,080,475 | $733,309 | -$347,166 | -32.13% | |
| Charles Schwab Investment Management Inc | 0.00% | 30,438 | $1,046,306 | $710,119 | -$336,187 | -32.13% | |
| Monimus Capital Management, Lp | 0.25% | 28,143 | $967,416 | $656,576 | -$310,840 | -32.13% | |
| Bank Of New York Mellon Corp | 0.00% | 25,247 | $867,872 | $589,013 | -$278,859 | -32.13% | |
| Alps Advisors Inc | 0.00% | 19,147 | $658,178 | $446,700 | -$211,478 | -32.13% |
Frequently asked questions about TECX
Who are the largest institutional holders of TECX?
The largest institutional holders of TECX reported in the latest SEC Form 13F filings include Fmr Llc, Tcg Crossover Management, Llc, Aberdeen Group Plc, Blackrock, Inc., and First Light Asset Management, Llc. InsiderSet ranks institutional holders by their latest reported TECX position.
What is TECX institutional ownership?
This page tracks TECX positions reported by institutional investment managers through SEC Form 13F. TECTONIC THERAPEUTIC INC (TECX) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own TECX?
InsiderSet currently tracks 122 institutional managers reporting TECX holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of TECX shareholders.
How much TECX stock do institutions own?
Institutional investment managers disclosed approximately $479.69M in TECX holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was TECX institutional ownership last updated?
The latest TECX institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional TECX holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its TECX position after the reporting date.
Are institutions buying or selling TECX?
Institutional buying and selling can be analyzed by comparing TECX positions across consecutive 13F reporting periods. InsiderSet's TECX Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View TECX ownership changes.
How has TECX institutional ownership changed over time?
InsiderSet tracks TECX institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.