Starling Oncology, Inc.: which funds bought and sold

Institutions that bought and sold Starling Oncology 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, 78 institutions that filed 13F reports for both quarters added to or opened positions in Starling Oncology, and 46 cut or closed them. Together they added a net 1.3M shares, +3.4% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 1.0M shares (+9.8%); index fund managers were net buyers of 484K shares (+3.6%). 27 opened a new position and 21 sold out entirely.

Bought, Q2 2026 78 institutions, 27 of them new holders Sold, Q2 2026 46 institutions, 21 of them sold out

Net change, all compared +1.3M shares (+3.4%)

Net change, active managers +1.0M shares (+9.8%), 18 bought, 10 sold

Buyers versus sellers

institutions compared, 141

78 bought 17 46 sold

Active managers and hedge funds 18 bought · 10 sold · +1.0M

Index fund managers 7 bought · 3 sold · +484K

Other institutions 53 bought · 33 sold · −157K

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Nuveen, LLC	+1.3M +1378.8%	1.4M	$7.6M
Marshall Wace, LLP Hedge fund	+880K +257.2%	1.2M	$6.6M
Acadian Asset Management LLC Active manager	+567K New position	567K	$3.1M
Renaissance Technologies LLC Hedge fund	+463K +51.3%	1.4M	$7.4M
Manatuck Hill Partners, LLC	+450K New position	450K	$2.4M
Walleye Capital LLC Hedge fund	+446K New position	446K	$2.4M
Jane Street Group, LLC	+427K +100.6%	852K	$4.6M
Inspire Investing, LLC	+424K New position	424K	$2.3M
Goldman Sachs Group Inc	+383K +28.4%	1.7M	$9.4M
Two Sigma Investments, LP Hedge fund	+361K +117.3%	669K	$3.6M
Blackrock, Inc. Index funds	+333K +7.5%	4.7M	$25.8M
Bank Of America Corp	+329K +517.9%	392K	$2.1M
Invesco Ltd.	+305K +819.3%	342K	$1.9M
Formula Growth Ltd	+300K New position	300K	$1.6M
Arrowstreet Capital, Limited Partnership Hedge fund	+291K +69.5%	711K	$3.9M
Citadel Advisors LLC Hedge fund	+286K +47.0%	894K	$4.9M
SG Americas Securities, LLC	+249K +1766.6%	263K	$1.4M
Informed Momentum Co LLC	+188K New position	188K	$1M
Vanguard Portfolio Management LLC Index funds	+144K +16.7%	1.0M	$5.5M
Geode Capital Management, LLC Index funds	+142K +8.1%	1.9M	$10.3M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Marshall Wace, LLP Hedge fund	+880K +257.2%	1.2M	$6.6M
Acadian Asset Management LLC Active manager	+567K New position	567K	$3.1M
Renaissance Technologies LLC Hedge fund	+463K +51.3%	1.4M	$7.4M
Walleye Capital LLC Hedge fund	+446K New position	446K	$2.4M
Two Sigma Investments, LP Hedge fund	+361K +117.3%	669K	$3.6M
Arrowstreet Capital, Limited Partnership Hedge fund	+291K +69.5%	711K	$3.9M
Citadel Advisors LLC Hedge fund	+286K +47.0%	894K	$4.9M
Boothbay Fund Management, LLC Hedge fund	+96K +69.4%	233K	$1.3M
Squarepoint Ops LLC Hedge fund	+49K +205.7%	73K	$395,641
Los Angeles Capital Management LLC Active manager	+34K New position	34K	$184,267

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Kanen Wealth Management LLC	−2.8M Sold out	0	—
Balyasny Asset Management L.P. Hedge fund	−1.8M Sold out	0	—
Ensign Peak Advisors, Inc	−627K Sold out	0	—
UBS Group AG	−421K −73.3%	153K	$832,272
Centerbook Partners LP Hedge fund	−327K −20.8%	1.2M	$6.7M
Dauntless Investment Group, LLC	−298K −64.6%	164K	$888,185
Centiva Capital, LP Hedge fund	−224K Sold out	0	—
Vanguard Capital Management LLC Index funds	−211K −6.1%	3.3M	$17.7M
Tiff Advisory Services, LLC	−195K Sold out	0	—
Brc Group Holdings, Inc.	−187K −20.1%	743K	$4M
Jump Financial, LLC	−104K −89.4%	12K	$66,789
Susquehanna International Group, LLP	−93K Sold out	0	—
Xtx Topco Ltd	−90K Sold out	0	—
Lee Financial Co	−81K Sold out	0	—
Aquatic Capital Management LLC	−78K Sold out	0	—
Rhumbline Advisers Index funds	−78K Sold out	0	—
Wealthshield Partners, LLC	−70K Sold out	0	—
Engineers Gate Manager LP Hedge fund	−50K −80.3%	12K	$67,017
ADAR1 Capital Management, LLC Hedge fund	−50K Sold out	0	—
Private Advisor Group, LLC	−48K −51.3%	46K	$248,968

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Balyasny Asset Management L.P. Hedge fund	−1.8M Sold out	0	—
Centerbook Partners LP Hedge fund	−327K −20.8%	1.2M	$6.7M
Centiva Capital, LP Hedge fund	−224K Sold out	0	—
Engineers Gate Manager LP Hedge fund	−50K −80.3%	12K	$67,017
ADAR1 Capital Management, LLC Hedge fund	−50K Sold out	0	—
Millennium Management LLC Hedge fund	−35K −26.3%	97K	$526,031
Graham Capital Management, L.P. Hedge fund	−34K Sold out	0	—
Schonfeld Strategic Advisors LLC Hedge fund	−21K Sold out	0	—
Quantbot Technologies LP Hedge fund	−9,455 Sold out	0	—
Intech Investment Management LLC Active manager	−1,951 −8.7%	21K	$111,483

New positions

largest by value

Institution	Shares	Value June 30, 2026
Acadian Asset Management LLCActive manager	567K	$3.1M
Manatuck Hill Partners, LLC	450K	$2.4M
Walleye Capital LLCHedge fund	446K	$2.4M
Inspire Investing, LLC	424K	$2.3M
Formula Growth Ltd	300K	$1.6M
Informed Momentum Co LLC	188K	$1M
Panoramic Capital, LLC	100K	$543,000
Gsa Capital Partners LLP	99K	$536,000
White Pine Capital LLC	86K	$464,906
Allspring Global Investments Holdings, LLC	51K	$278,461

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Kanen Wealth Management LLC	2.8M	$8.5M
Balyasny Asset Management L.P.Hedge fund	1.8M	$5.6M
Ensign Peak Advisors, Inc	627K	$1.9M
Centiva Capital, LPHedge fund	224K	$688,432
Tiff Advisory Services, LLC	195K	$564,905
Susquehanna International Group, LLP	93K	$285,108
Xtx Topco Ltd	90K	$277,362
Lee Financial Co	81K	$249,782
Aquatic Capital Management LLC	78K	$240,897
Rhumbline AdvisersIndex funds	78K	$238,977

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 120
Ten largest holders: 58.6%
Index fund managers: 34.4%
Active managers and hedge funds: 28.1%

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	18	10	6	6	+1.0M	+9.8%
Index fund managers	7	3	0	1	+484K	+3.6%
Other institutions	53	33	21	14	−157K	−1.0%

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 Starling Oncology.

Only managers that filed a holdings report for both quarters are compared (141 here). 1 other holder is 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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