Tectonic Therapeutic, Inc.: which funds bought and sold

Institutions that bought and sold Tectonic Therapeutic shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 64 institutions that filed 13F reports for both quarters added to or opened positions in Tectonic Therapeutic, and 51 cut or closed them. Together they added a net 155K shares, +1.1% on what they held at the start of the quarter. Active managers and hedge funds on our list were net sellers of 99K shares (−1.6%); index fund managers were net buyers of 94K shares (+4.5%). 25 opened a new position and 11 sold out entirely.

Bought, Q2 2026 64 institutions, 25 of them new holders Sold, Q2 2026 51 institutions, 11 of them sold out

Net change, all compared +155K shares (+1.1%)

Net change, active managers −99K shares (−1.6%), 15 bought, 10 sold

Buyers versus sellers

institutions compared, 134

64 bought 19 51 sold

Active managers and hedge funds 15 bought · 10 sold · −99K

Index fund managers 8 bought · 1 sold · +94K

Other institutions 41 bought · 40 sold · +160K

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
First Light Asset Management, LLC	+153K +23.6%	801K	$27.5M
Millennium Management LLC Hedge fund	+107K +183.7%	166K	$5.7M
Vestal Point Capital, LP Hedge fund	+97K +29.6%	425K	$14.6M
Citadel Advisors LLC Hedge fund	+90K New position	90K	$3.1M
D. E. Shaw & Co., Inc. Hedge fund	+70K +60.7%	187K	$6.4M
Jane Street Group, LLC	+66K New position	66K	$2.3M
Sectoral Asset Management Inc	+52K +272.6%	71K	$2.4M
Ikarian Capital, LLC	+48K +30.7%	206K	$7.1M
HRT Financial LP	+45K New position	45K	$1.5M
Trexquant Investment LP Hedge fund	+37K New position	37K	$1.3M
Northern Trust Corp Index funds	+36K +45.4%	114K	$3.9M
Vanguard Portfolio Management LLC Index funds	+31K +48.4%	94K	$3.2M
Fisher Asset Management, LLC Active manager	+19K New position	19K	$657,318
Quadrature Capital Ltd Hedge fund	+18K New position	18K	$621,053
Vanguard Capital Management LLC Index funds	+15K +3.2%	489K	$16.8M
Boothbay Fund Management, LLC Hedge fund	+15K +31.7%	61K	$2.1M
FMR LLC Active manager	+14K +0.5%	2.8M	$97.3M
Goldman Sachs Group Inc	+11K +18.4%	74K	$2.5M
Brevan Howard Capital Management LP Hedge fund	+9,573 New position	9,573	$329,072
Tetragon Partners Gp Ltd	+8,928 +23.8%	47K	$1.6M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Millennium Management LLC Hedge fund	+107K +183.7%	166K	$5.7M
Vestal Point Capital, LP Hedge fund	+97K +29.6%	425K	$14.6M
Citadel Advisors LLC Hedge fund	+90K New position	90K	$3.1M
D. E. Shaw & Co., Inc. Hedge fund	+70K +60.7%	187K	$6.4M
Trexquant Investment LP Hedge fund	+37K New position	37K	$1.3M
Fisher Asset Management, LLC Active manager	+19K New position	19K	$657,318
Quadrature Capital Ltd Hedge fund	+18K New position	18K	$621,053
Boothbay Fund Management, LLC Hedge fund	+15K +31.7%	61K	$2.1M
FMR LLC Active manager	+14K +0.5%	2.8M	$97.3M
Brevan Howard Capital Management LP Hedge fund	+9,573 New position	9,573	$329,072

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Braidwell LP Hedge fund	−250K −29.5%	597K	$20.5M
Opaleye Management Inc.	−123K Sold out	0	—
Price T Rowe Associates Inc Active manager	−116K −70.7%	48K	$1.7M
Point72 Asset Management, L.P. Hedge fund	−69K Sold out	0	—
Marshall Wace, LLP Hedge fund	−57K −25.0%	172K	$5.9M
Exoduspoint Capital Management, LP Hedge fund	−48K −57.9%	35K	$1.2M
Prosight Management, LP	−40K −50.3%	40K	$1.4M
TD Asset Management Inc	−20K Sold out	0	—
Soleus Capital Management, L.P. Hedge fund	−20K −16.4%	102K	$3.5M
Sei Investments Co	−20K −53.8%	17K	$585,372
Squarepoint Ops LLC Hedge fund	−19K −11.8%	145K	$5M
Susquehanna International Group, LLP	−16K Sold out	0	—
UBS Group AG	−15K −49.8%	15K	$517,516
Xtx Topco Ltd	−12K Sold out	0	—
Gsa Capital Partners LLP	−11K −56.2%	8,275	$284,000
AQR Capital Management LLC Hedge fund	−10K −60.9%	6,617	$227,460
Clearstead Advisors, LLC	−10K −37.9%	17K	$571,657
Manufacturers Life Insurance Company, The	−7,933 −57.0%	5,996	$206,113
Kennedy Capital Management LLC Active manager	−4,480 −1.6%	282K	$9.7M
Jpmorgan Chase & Co	−3,506 −6.0%	55K	$1.8M

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Braidwell LP Hedge fund	−250K −29.5%	597K	$20.5M
Price T Rowe Associates Inc Active manager	−116K −70.7%	48K	$1.7M
Point72 Asset Management, L.P. Hedge fund	−69K Sold out	0	—
Marshall Wace, LLP Hedge fund	−57K −25.0%	172K	$5.9M
Exoduspoint Capital Management, LP Hedge fund	−48K −57.9%	35K	$1.2M
Soleus Capital Management, L.P. Hedge fund	−20K −16.4%	102K	$3.5M
Squarepoint Ops LLC Hedge fund	−19K −11.8%	145K	$5M
AQR Capital Management LLC Hedge fund	−10K −60.9%	6,617	$227,460
Kennedy Capital Management LLC Active manager	−4,480 −1.6%	282K	$9.7M
Pfm Health Sciences, LP Hedge fund	−498 −1.1%	46K	$1.6M

New positions

largest by value

Institution	Shares	Value June 30, 2026
Citadel Advisors LLCHedge fund	90K	$3.1M
Jane Street Group, LLC	66K	$2.3M
HRT Financial LP	45K	$1.5M
Trexquant Investment LPHedge fund	37K	$1.3M
Fisher Asset Management, LLCActive manager	19K	$657,318
Quadrature Capital LtdHedge fund	18K	$621,053
Brevan Howard Capital Management LPHedge fund	9,573	$329,072
Fox Run Management, L.L.C.	8,865	$304,734
Alliancebernstein L.P.Active manager	7,460	$230,589
State Board Of Administration Of Florida Retirement System	6,060	$208,313

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Opaleye Management Inc.	123K	$3.8M
Point72 Asset Management, L.P.Hedge fund	69K	$2.1M
TD Asset Management Inc	20K	$630,564
Susquehanna International Group, LLP	16K	$499,969
Xtx Topco Ltd	12K	$359,205
Caption Management, LLC	1,449	$44,789
Global Wealth Strategies & Associates	18	$556
Fortitude Family Office, LLC	15	$464
Mai Capital Management	7	$217
True Wealth Design, LLC	7	$217

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 123
Ten largest holders: 68.5%
Index fund managers: 15.5%
Active managers and hedge funds: 43.4%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	15	10	7	1	−99K	−1.6%
Index fund managers	8	1	0	0	+94K	+4.5%
Other institutions	41	40	18	10	+160K	+2.9%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on Tectonic Therapeutic.

Only managers that filed a holdings report for both quarters are compared (134 here). 2 other holders are left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

← Back to Tectonic Therapeutic, Inc. · Insiders · Politicians