Summit Therapeutics Inc.: which funds bought and sold

Institutions that bought and sold Summit Therapeutics 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, 148 institutions that filed 13F reports for both quarters added to or opened positions in Summit Therapeutics, and 92 cut or closed them. Together they added a net 15.6M shares, +13.2% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 4.7M shares (+7.3%); index fund managers were net buyers of 2.4M shares (+7.0%). 53 opened a new position and 35 sold out entirely.

Bought, Q2 2026 148 institutions, 53 of them new holders Sold, Q2 2026 92 institutions, 35 of them sold out

Net change, all compared +15.6M shares (+13.2%)

Net change, active managers +4.7M shares (+7.3%), 26 bought, 12 sold

Buyers versus sellers

institutions compared, 270

148 bought 30 92 sold

Active managers and hedge funds 26 bought · 12 sold · +4.7M

Index fund managers 6 bought · 5 sold · +2.4M

Other institutions 116 bought · 75 sold · +8.6M

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Goldman Sachs Group Inc	+4.2M +1352.5%	4.5M	$65.8M
Point72 Asset Management, L.P. Hedge fund	+2.9M +371.5%	3.7M	$53.9M
State Street Corp Index funds	+2.5M +35.7%	9.5M	$139M
Millennium Management LLC Hedge fund	+2.2M +1760.3%	2.3M	$34.2M
Adage Capital Partners Gp, L.L.C. Hedge fund	+2.0M New position	2.0M	$29M
UBS Group AG	+1.6M +42.2%	5.2M	$76.3M
Balyasny Asset Management L.P. Hedge fund	+1.4M +247.3%	1.9M	$27.7M
Logos Global Management LP Hedge fund	+1.4M New position	1.4M	$19.7M
Citadel Advisors LLC Hedge fund	+1.3M +290.7%	1.7M	$25.1M
Octagon Capital Advisors LP	+1.3M New position	1.3M	$18.2M
Kynam Capital Management, LP Hedge fund	+1.2M New position	1.2M	$17.5M
Aberdeen Group PLC	+1.0M +154.5%	1.7M	$24.7M
Squarepoint Ops LLC Hedge fund	+977K +159.1%	1.6M	$23.2M
Schroder Investment Management Group Active manager	+585K +232.5%	836K	$12M
Citigroup Inc	+515K +258.6%	714K	$10.4M
Elmind Capital, LP	+494K New position	494K	$7.2M
Worldquant Millennium Advisors LLC Hedge fund	+373K +639.7%	431K	$6.3M
Ghisallo Capital Management LLC Hedge fund	+350K New position	350K	$5.1M
Hohimer Wealth Management, LLC	+339K New position	339K	$4.9M
Jump Financial, LLC	+274K +236.6%	390K	$5.7M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Point72 Asset Management, L.P. Hedge fund	+2.9M +371.5%	3.7M	$53.9M
Millennium Management LLC Hedge fund	+2.2M +1760.3%	2.3M	$34.2M
Adage Capital Partners Gp, L.L.C. Hedge fund	+2.0M New position	2.0M	$29M
Balyasny Asset Management L.P. Hedge fund	+1.4M +247.3%	1.9M	$27.7M
Logos Global Management LP Hedge fund	+1.4M New position	1.4M	$19.7M
Citadel Advisors LLC Hedge fund	+1.3M +290.7%	1.7M	$25.1M
Kynam Capital Management, LP Hedge fund	+1.2M New position	1.2M	$17.5M
Squarepoint Ops LLC Hedge fund	+977K +159.1%	1.6M	$23.2M
Schroder Investment Management Group Active manager	+585K +232.5%	836K	$12M
Worldquant Millennium Advisors LLC Hedge fund	+373K +639.7%	431K	$6.3M

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Price T Rowe Associates Inc Active manager	−4.4M −53.0%	3.9M	$56.7M
Baker Bros. Advisors LP Hedge fund	−3.6M −9.9%	32.8M	$478M
D. E. Shaw & Co., Inc. Hedge fund	−999K −44.5%	1.2M	$18.1M
Superstring Capital Management LP	−893K Sold out	0	—
FMR LLC Active manager	−809K −7.5%	10.0M	$146M
TD Asset Management Inc	−531K −55.5%	426K	$6.2M
Tudor Investment Corp Et Al Hedge fund	−385K Sold out	0	—
Apeiron Capital Ltd	−347K −26.5%	962K	$14M
Manufacturers Life Insurance Company, The	−295K −49.7%	298K	$4.3M
Two Sigma Investments, LP Hedge fund	−284K −29.0%	697K	$10.2M
E Fund Management Co., Ltd.	−281K −90.2%	30K	$443,918
Exoduspoint Capital Management, LP Hedge fund	−256K Sold out	0	—
Nomura Holdings Inc	−202K −64.2%	112K	$1.6M
Morgan Stanley	−201K −12.2%	1.5M	$21.1M
Vanguard Portfolio Management LLC Index funds	−191K −3.7%	5.0M	$73.5M
Pictet Asset Management Holding SA	−189K −14.3%	1.1M	$16.4M
Blackrock, Inc. Index funds	−125K −1.3%	9.5M	$139M
Y-Intercept (Hong Kong) Ltd	−120K Sold out	0	—
Invesco Ltd.	−109K −20.8%	417K	$6.1M
Jefferies Financial Group Inc.	−100K Sold out	0	—

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Price T Rowe Associates Inc Active manager	−4.4M −53.0%	3.9M	$56.7M
Baker Bros. Advisors LP Hedge fund	−3.6M −9.9%	32.8M	$478M
D. E. Shaw & Co., Inc. Hedge fund	−999K −44.5%	1.2M	$18.1M
FMR LLC Active manager	−809K −7.5%	10.0M	$146M
Tudor Investment Corp Et Al Hedge fund	−385K Sold out	0	—
Two Sigma Investments, LP Hedge fund	−284K −29.0%	697K	$10.2M
Exoduspoint Capital Management, LP Hedge fund	−256K Sold out	0	—
Boothbay Fund Management, LLC Hedge fund	−54K Sold out	0	—
Winton Group Ltd Hedge fund	−22K Sold out	0	—
Lighthouse Investment Partners, LLC Hedge fund	−12K Sold out	0	—

New positions

largest by value

Institution	Shares	Value June 30, 2026
Adage Capital Partners Gp, L.L.C.Hedge fund	2.0M	$29M
Logos Global Management LPHedge fund	1.4M	$19.7M
Octagon Capital Advisors LP	1.3M	$18.2M
Kynam Capital Management, LPHedge fund	1.2M	$17.5M
Elmind Capital, LP	494K	$7.2M
Ghisallo Capital Management LLCHedge fund	350K	$5.1M
Hohimer Wealth Management, LLC	339K	$4.9M
HRT Financial LP	198K	$2.9M
Trexquant Investment LPHedge fund	184K	$2.7M
HSBC Holdings PLC	121K	$1.8M

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Superstring Capital Management LP	893K	$16.9M
Tudor Investment Corp Et AlHedge fund	385K	$7.3M
Exoduspoint Capital Management, LPHedge fund	256K	$4.9M
Y-Intercept (Hong Kong) Ltd	120K	$2.3M
Jefferies Financial Group Inc.	100K	$1.9M
Canada Pension Plan Investment Board	91K	$1.7M
Nextbio Capital Management LP	90K	$1.7M
Longaeva Partners L.P.	57K	$1.1M
Boothbay Fund Management, LLCHedge fund	54K	$1M
SG Americas Securities, LLC	54K	$1M

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 241
Ten largest holders: 66.2%
Index fund managers: 26.6%
Active managers and hedge funds: 51.1%

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	26	12	10	6	+4.7M	+7.3%
Index fund managers	6	5	0	0	+2.4M	+7.0%
Other institutions	116	75	43	29	+8.6M	+42.6%

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 Summit Therapeutics.

Only managers that filed a holdings report for both quarters are compared (270 here). 10 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.

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