TECTONIC THERAPEUTIC INC (TECX) Institutional Shareholders
TECTONIC THERAPEUTIC INC (TECX) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $479.70M in TECX holdings during the latest filing period.
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 $76.42M, representing an estimated loss of -21.45% 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
$479.70M
Largest Holder
Fmr Llc
Largest Position
$97.29M
Insider Transactions (90d)
4
Latest Filing Quarter
Q2 2026
New Institutional Positions
150
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 | $76,420,206 | -$20,874,027 | -21.45% | |
| Tcg Crossover Management, Llc | 1.00% | 1,204,891 | $41,418,128 | $32,532,057 | -$8,886,071 | -21.45% | |
| Aberdeen Group Plc | 0.06% | 1,141,824 | $39,250,200 | $30,829,248 | -$8,420,952 | -21.45% | |
| Blackrock, Inc. | 0.00% | 862,592 | $29,651,600 | $23,289,984 | -$6,361,616 | -21.45% | |
| First Light Asset Management, Llc | 1.67% | 800,726 | $27,524,958 | $21,619,602 | -$5,905,356 | -21.45% | |
| Baker Bros. Advisors Lp | 0.10% | 607,788 | $20,892,713 | $16,410,276 | -$4,482,437 | -21.45% | |
| 5Am Venture Management, Llc | 7.24% | 606,660 | $20,853,938 | $16,379,820 | -$4,474,118 | -21.45% | |
| Braidwell Lp | 0.76% | 596,900 | $20,518,438 | $16,116,300 | -$4,402,138 | -21.45% | |
| Vanguard Capital Management Llc | 0.00% | 488,805 | $16,802,672 | $13,197,735 | -$3,604,937 | -21.45% | |
| Vestal Point Capital, Lp | 0.34% | 425,000 | $14,609,375 | $11,475,000 | -$3,134,375 | -21.45% | |
| Bollard Group Llc | 0.32% | 302,953 | $10,414,000 | $8,179,731 | -$2,234,269 | -21.45% | |
| Kennedy Capital Management Llc | 0.17% | 282,202 | $9,700,694 | $7,619,454 | -$2,081,240 | -21.45% | |
| Geode Capital Management, Llc | 0.00% | 270,461 | $9,299,108 | $7,302,447 | -$1,996,661 | -21.47% | |
| Orbimed Advisors Llc | 0.15% | 226,600 | $7,789,375 | $6,118,200 | -$1,671,175 | -21.45% | |
| State Street Corp | 0.00% | 219,908 | $7,559,338 | $5,937,516 | -$1,621,822 | -21.45% | |
| Ikarian Capital, Llc | 1.16% | 205,837 | $7,075,647 | $5,557,599 | -$1,518,048 | -21.45% | |
| D. E. Shaw & Co., Inc. | 0.00% | 186,550 | $6,412,656 | $5,036,850 | -$1,375,806 | -21.45% | |
| Marshall Wace, Llp | 0.00% | 172,101 | $5,916,833 | $4,646,727 | -$1,270,106 | -21.47% | |
| Millennium Management Llc | 0.00% | 165,525 | $5,689,922 | $4,469,175 | -$1,220,747 | -21.45% | |
| Squarepoint Ops Llc | 0.01% | 145,028 | $4,985,338 | $3,915,756 | -$1,069,582 | -21.45% | |
| Ameriprise Financial Inc | 0.00% | 142,448 | $4,896,673 | $3,846,096 | -$1,050,577 | -21.45% | |
| Wells Fargo & Company/Mn | 0.00% | 117,428 | $4,036,588 | $3,170,556 | -$866,032 | -21.45% | |
| Northern Trust Corp | 0.00% | 113,904 | $3,915,450 | $3,075,408 | -$840,042 | -21.45% | |
| Soleus Capital Management, L.P. | 0.12% | 101,684 | $3,495,388 | $2,745,468 | -$749,920 | -21.45% | |
| Woodline Partners Lp | 0.01% | 100,000 | $3,437,500 | $2,700,000 | -$737,500 | -21.45% | |
| Vanguard Portfolio Management Llc | 0.00% | 94,414 | $3,245,481 | $2,549,178 | -$696,303 | -21.45% | |
| Citadel Advisors Llc | 0.00% | 90,393 | $3,107,260 | $2,440,611 | -$666,649 | -21.45% | |
| Goldman Sachs Group Inc | 0.00% | 73,924 | $2,541,138 | $1,995,948 | -$545,190 | -21.45% | |
| Raymond James Financial Inc | 0.00% | 72,674 | $2,498,169 | $1,962,198 | -$535,971 | -21.45% | |
| Sectoral Asset Management Inc | 1.70% | 71,009 | $2,440,934 | $1,917,243 | -$523,691 | -21.45% | |
| Vanguard Fiduciary Trust Co | 0.00% | 68,394 | $2,351,044 | $1,846,638 | -$504,406 | -21.45% | |
| Jane Street Group, Llc | 0.00% | 65,821 | $2,262,596 | $1,777,167 | -$485,429 | -21.45% | |
| Morgan Stanley | 0.00% | 65,373 | $2,247,205 | $1,765,071 | -$482,134 | -21.45% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | 64,940 | $2,232,313 | $1,753,380 | -$478,933 | -21.45% | |
| Boothbay Fund Management, Llc | 0.04% | 60,771 | $2,089,003 | $1,640,817 | -$448,186 | -21.45% | |
| Jpmorgan Chase & Co | 0.00% | 55,364 | $1,831,995 | $1,494,828 | -$337,167 | -18.40% | |
| Price T Rowe Associates Inc | 0.00% | 48,001 | $1,651,000 | $1,296,027 | -$354,973 | -21.50% | |
| Tetragon Partners Gp Ltd | 0.26% | 46,516 | $1,598,988 | $1,255,932 | -$343,056 | -21.45% | |
| Pfm Health Sciences, Lp | 0.14% | 45,631 | $1,568,566 | $1,232,037 | -$336,529 | -21.45% | |
| Hrt Financial Lp | 0.00% | 44,540 | $1,531,000 | $1,202,580 | -$328,420 | -21.45% | |
| Jump Financial, Llc | 0.01% | 43,400 | $1,491,875 | $1,171,800 | -$320,075 | -21.45% | |
| Prosight Management, Lp | 0.24% | 39,731 | $1,365,753 | $1,072,737 | -$293,016 | -21.45% | |
| Trexquant Investment Lp | 0.01% | 36,991 | $1,271,566 | $998,757 | -$272,809 | -21.45% | |
| Aldebaran Capital, Llc | 0.95% | 36,797 | $1,264,897 | $993,519 | -$271,378 | -21.45% | |
| Exoduspoint Capital Management, Lp | 0.01% | 35,239 | $1,211,341 | $951,453 | -$259,888 | -21.45% | |
| Wellington Management Group Llp | 0.00% | 31,432 | $1,080,475 | $848,664 | -$231,811 | -21.45% | |
| Charles Schwab Investment Management Inc | 0.00% | 30,438 | $1,046,306 | $821,826 | -$224,480 | -21.45% | |
| Monimus Capital Management, Lp | 0.25% | 28,143 | $967,416 | $759,861 | -$207,555 | -21.45% | |
| Bank Of New York Mellon Corp | 0.00% | 25,247 | $867,872 | $681,669 | -$186,203 | -21.46% | |
| Alps Advisors Inc | 0.00% | 19,147 | $658,178 | $516,969 | -$141,209 | -21.45% |
Frequently asked questions about TECX
Who owns the most TECX stock?
The largest holders of TECX are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for TECTONIC THERAPEUTIC INC (TECX).
Is TECX widely held by superinvestors?
Many widely followed stocks like TECX appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly TECX is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.