Acadian Asset Management Inc.: which funds bought and sold

Institutions that bought and sold Acadian Asset Management 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, 164 institutions that filed 13F reports for both quarters added to or opened positions in Acadian Asset Management, and 114 cut or closed them. Together they added a net 220K shares, +0.6% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 305K shares (+3.4%); index fund managers were net buyers of 72K shares (+0.8%). 64 opened a new position and 18 sold out entirely.

Bought, Q2 2026 164 institutions, 64 of them new holders Sold, Q2 2026 114 institutions, 18 of them sold out

Net change, all compared +220K shares (+0.6%)

Net change, active managers +305K shares (+3.4%), 26 bought, 24 sold

Buyers versus sellers

institutions compared, 313

164 bought 35 114 sold

Active managers and hedge funds 26 bought · 24 sold · +305K

Index fund managers 6 bought · 5 sold · +72K

Other institutions 132 bought · 85 sold · −157K

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Invesco Ltd.	+964K +233.5%	1.4M	$98.4M
Driehaus Capital Management LLC Active manager	+789K New position	789K	$56.4M
Avantyr Capital Partners, LP	+768K New position	768K	$54.9M
Amundi	+317K New position	317K	$22.7M
Healthcare Of Ontario Pension Plan Trust Fund	+228K +1069.4%	249K	$17.8M
Geode Capital Management, LLC Index funds	+222K +29.7%	970K	$69.4M
Woodline Partners LP Hedge fund	+182K +25.9%	884K	$63.2M
Azora Capital LP Hedge fund	+167K +50.6%	496K	$35.5M
Allspring Global Investments Holdings, LLC	+134K +32.1%	554K	$39.8M
AQR Capital Management LLC Hedge fund	+94K +59.1%	254K	$18.2M
Morgan Stanley	+86K +16.0%	623K	$44.6M
Ghisallo Capital Management LLC Hedge fund	+85K New position	85K	$6.1M
Informed Momentum Co LLC	+82K New position	82K	$5.9M
Universal- Beteiligungs- Und Servicegesellschaft Mbh	+78K +287.5%	105K	$7.5M
Walleye Capital LLC Hedge fund	+63K +321.6%	83K	$5.9M
Rockefeller Capital Management L.P.	+50K +10819.2%	50K	$3.6M
Trexquant Investment LP Hedge fund	+45K +262.2%	63K	$4.5M
Two Sigma Investments, LP Hedge fund	+45K +9.4%	524K	$37.5M
Mackenzie Financial Corp	+40K New position	40K	$2.9M
UBS Am, A Distinct Business Unit Of UBS Asset Management Americas LLC	+36K +53.5%	104K	$7.4M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Driehaus Capital Management LLC Active manager	+789K New position	789K	$56.4M
Woodline Partners LP Hedge fund	+182K +25.9%	884K	$63.2M
Azora Capital LP Hedge fund	+167K +50.6%	496K	$35.5M
AQR Capital Management LLC Hedge fund	+94K +59.1%	254K	$18.2M
Ghisallo Capital Management LLC Hedge fund	+85K New position	85K	$6.1M
Walleye Capital LLC Hedge fund	+63K +321.6%	83K	$5.9M
Trexquant Investment LP Hedge fund	+45K +262.2%	63K	$4.5M
Two Sigma Investments, LP Hedge fund	+45K +9.4%	524K	$37.5M
Squarepoint Ops LLC Hedge fund	+29K New position	29K	$2.1M
Thornburg Investment Management Inc Active manager	+28K +100.7%	56K	$4M

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Paulson & Co. Inc.	−1.9M −24.5%	5.8M	$418M
SG Americas Securities, LLC	−512K −84.8%	92K	$6.6M
Jennison Associates LLC Active manager	−496K −24.5%	1.5M	$109M
Impax Asset Management Group PLC	−473K −57.5%	350K	$25M
Jacobs Levy Equity Management, Inc Active manager	−166K −52.3%	152K	$10.9M
North Reef Capital Management LP Hedge fund	−134K −60.7%	87K	$6.2M
Qube Research & Technologies Ltd Hedge fund	−119K −68.1%	56K	$4M
Man Group PLC Hedge fund	−118K Sold out	0	—
Arrowstreet Capital, Limited Partnership Hedge fund	−92K −38.1%	149K	$10.7M
Karl Kapital LLC	−90K Sold out	0	—
Deutsche Bank Ag\	−90K −75.2%	30K	$2.1M
Blackrock, Inc. Index funds	−88K −1.9%	4.5M	$321M
Vanguard Portfolio Management LLC Index funds	−71K −8.0%	813K	$58.2M
Kestrel Investment Management Corp	−62K Sold out	0	—
William Blair Investment Management, LLC Active manager	−56K −21.2%	208K	$14.9M
Charles Schwab Investment Management Inc Index funds	−50K −11.0%	403K	$28.8M
Assenagon Asset Management S.A.	−46K Sold out	0	—
Soros Fund Management LLC Hedge fund	−39K −5.9%	610K	$43.6M
Susquehanna Portfolio Strategies, LLC	−35K Sold out	0	—
Jane Street Group, LLC	−32K Sold out	0	—

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Jennison Associates LLC Active manager	−496K −24.5%	1.5M	$109M
Jacobs Levy Equity Management, Inc Active manager	−166K −52.3%	152K	$10.9M
North Reef Capital Management LP Hedge fund	−134K −60.7%	87K	$6.2M
Qube Research & Technologies Ltd Hedge fund	−119K −68.1%	56K	$4M
Man Group PLC Hedge fund	−118K Sold out	0	—
Arrowstreet Capital, Limited Partnership Hedge fund	−92K −38.1%	149K	$10.7M
William Blair Investment Management, LLC Active manager	−56K −21.2%	208K	$14.9M
Soros Fund Management LLC Hedge fund	−39K −5.9%	610K	$43.6M
Renaissance Technologies LLC Hedge fund	−29K −47.7%	32K	$2.3M
Intech Investment Management LLC Active manager	−24K −61.1%	15K	$1.1M

New positions

largest by value

Institution	Shares	Value June 30, 2026
Driehaus Capital Management LLCActive manager	789K	$56.4M
Avantyr Capital Partners, LP	768K	$54.9M
Amundi	317K	$22.7M
Ghisallo Capital Management LLCHedge fund	85K	$6.1M
Informed Momentum Co LLC	82K	$5.9M
Mackenzie Financial Corp	40K	$2.9M
Squarepoint Ops LLCHedge fund	29K	$2.1M
Diametric Capital, LP	28K	$2M
Fulcrum Asset Management LLP	23K	$1.6M
Point72 Asset Management, L.P.Hedge fund	19K	$1.3M

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Man Group PLCHedge fund	118K	$6.4M
Karl Kapital LLC	90K	$4.9M
Kestrel Investment Management Corp	62K	$3.4M
Assenagon Asset Management S.A.	46K	$2.5M
Susquehanna Portfolio Strategies, LLC	35K	$1.9M
Jane Street Group, LLC	32K	$1.7M
HRT Financial LP	26K	$1.4M
LPL Financial LLC	23K	$1.3M
Ieq Capital, LLC	6,839	$372,183
Panagora Asset Management IncActive manager	4,048	$220,292

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 299
Ten largest holders: 54.7%
Index fund managers: 26.8%
Active managers and hedge funds: 25.6%

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	24	10	2	+305K	+3.4%
Index fund managers	6	5	1	0	+72K	+0.8%
Other institutions	132	85	53	16	−157K	−0.9%

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 Acadian Asset Management.

Only managers that filed a holdings report for both quarters are compared (313 here). 9 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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