Arq, Inc.: which funds bought and sold

Institutions that bought and sold Arq 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, 63 institutions that filed 13F reports for both quarters added to or opened positions in Arq, and 46 cut or closed them. Together they added a net 859K shares, +5.9% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 1.8M shares (+34.9%); index fund managers were net sellers of 2.8M shares (−49.6%). 27 opened a new position and 23 sold out entirely.

Bought, Q2 2026 63 institutions, 27 of them new holders Sold, Q2 2026 46 institutions, 23 of them sold out

Net change, all compared +859K shares (+5.9%)

Net change, active managers +1.8M shares (+34.9%), 16 bought, 6 sold

Buyers versus sellers

institutions compared, 120

63 bought 11 46 sold

Active managers and hedge funds 16 bought · 6 sold · +1.8M

Index fund managers 2 bought · 7 sold · −2.8M

Other institutions 45 bought · 33 sold · +1.9M

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
AQR Capital Management LLC Hedge fund	+728K +67.1%	1.8M	$4.6M
Truffle Hound Capital, LLC	+420K New position	420K	$1.1M
Rbf Capital, LLC	+370K New position	370K	$943,500
Jane Street Group, LLC	+319K +168.2%	509K	$1.3M
Two Sigma Investments, LP Hedge fund	+223K +777.3%	252K	$642,031
Marex Group Ltd	+201K +334.7%	261K	$665,162
Round Rock Advisors LLC	+188K +98.7%	379K	$966,396
Renaissance Technologies LLC Hedge fund	+187K +45.7%	598K	$1.5M
Connor, Clark & Lunn Investment Management Ltd.	+182K New position	182K	$463,562
Citadel Advisors LLC Hedge fund	+163K New position	163K	$416,163
Rangeley Capital, LLC	+157K New position	157K	$400,350
Dcf Advisers, LLC	+134K +40.8%	462K	$1.2M
UBS Group AG	+123K +950.6%	136K	$346,915
Royce & Associates LP Active manager	+114K +6.5%	1.9M	$4.8M
Marquette Asset Management, LLC	+107K New position	107K	$272,190
Qube Research & Technologies Ltd Hedge fund	+93K New position	93K	$237,170
D. E. Shaw & Co., Inc. Hedge fund	+77K +27.2%	358K	$914,121
Marshall Wace, LLP Hedge fund	+70K +8.7%	880K	$2.2M
Man Group PLC Hedge fund	+59K New position	59K	$150,333
Gsa Capital Partners LLP	+59K +20.2%	348K	$887,000

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
AQR Capital Management LLC Hedge fund	+728K +67.1%	1.8M	$4.6M
Two Sigma Investments, LP Hedge fund	+223K +777.3%	252K	$642,031
Renaissance Technologies LLC Hedge fund	+187K +45.7%	598K	$1.5M
Citadel Advisors LLC Hedge fund	+163K New position	163K	$416,163
Royce & Associates LP Active manager	+114K +6.5%	1.9M	$4.8M
Qube Research & Technologies Ltd Hedge fund	+93K New position	93K	$237,170
D. E. Shaw & Co., Inc. Hedge fund	+77K +27.2%	358K	$914,121
Marshall Wace, LLP Hedge fund	+70K +8.7%	880K	$2.2M
Man Group PLC Hedge fund	+59K New position	59K	$150,333
Point72 Asset Management, L.P. Hedge fund	+58K New position	58K	$146,834

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Blackrock, Inc. Index funds	−1.6M −75.7%	509K	$1.3M
State Street Corp Index funds	−411K −72.7%	154K	$392,667
Geode Capital Management, LLC Index funds	−402K −50.1%	400K	$1M
Vanguard Portfolio Management LLC Index funds	−184K Sold out	0	—
Dimensional Fund Advisors LP	−155K −20.3%	607K	$1.5M
Northern Trust Corp Index funds	−151K −65.9%	78K	$198,360
Susquehanna International Group, LLP	−103K −77.7%	30K	$75,500
Bank Of New York Mellon Corp	−73K Sold out	0	—
Strs Ohio	−72K Sold out	0	—
Charles Schwab Investment Management Inc Index funds	−70K Sold out	0	—
Xtx Topco Ltd	−47K −65.0%	25K	$64,892
Morgan Stanley	−45K −38.7%	71K	$181,441
Nuveen, LLC	−33K Sold out	0	—
Millennium Management LLC Hedge fund	−27K −58.2%	19K	$48,488
Rhumbline Advisers Index funds	−26K −62.8%	15K	$39,129
Wells Fargo & Company	−23K Sold out	0	—
Jacobs Levy Equity Management, Inc Active manager	−22K −6.3%	329K	$838,919
Goldman Sachs Group Inc	−21K −14.6%	120K	$307,020
Scientech Research LLC	−17K −49.4%	18K	$44,694
Price T Rowe Associates Inc Active manager	−17K Sold out	0	—

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Millennium Management LLC Hedge fund	−27K −58.2%	19K	$48,488
Jacobs Levy Equity Management, Inc Active manager	−22K −6.3%	329K	$838,919
Price T Rowe Associates Inc Active manager	−17K Sold out	0	—
American Century Companies Inc Active manager	−15K −23.1%	50K	$127,676
Alliancebernstein L.P. Active manager	−13K Sold out	0	—
Schonfeld Strategic Advisors LLC Hedge fund	−5,684 −29.7%	13K	$34,280

New positions

largest by value

Institution	Shares	Value June 30, 2026
Truffle Hound Capital, LLC	420K	$1.1M
Rbf Capital, LLC	370K	$943,500
Connor, Clark & Lunn Investment Management Ltd.	182K	$463,562
Citadel Advisors LLCHedge fund	163K	$416,163
Rangeley Capital, LLC	157K	$400,350
Marquette Asset Management, LLC	107K	$272,190
Qube Research & Technologies LtdHedge fund	93K	$237,170
Man Group PLCHedge fund	59K	$150,333
Point72 Asset Management, L.P.Hedge fund	58K	$146,834
Ieq Capital, LLC	38K	$97,813

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Vanguard Portfolio Management LLCIndex funds	184K	$471,670
Bank Of New York Mellon Corp	73K	$187,082
Strs Ohio	72K	$185,344
Charles Schwab Investment Management IncIndex funds	70K	$178,624
Nuveen, LLC	33K	$85,519
Wells Fargo & Company	23K	$57,837
Price T Rowe Associates IncActive manager	17K	$44,000
Alliancebernstein L.P.Active manager	13K	$41,529
Mirae Asset Global Etfs Holdings Ltd.	16K	$40,156
Two Sigma Securities, LLC	12K	$29,699

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 97
Ten largest holders: 61.2%
Index fund managers: 18.3%
Active managers and hedge funds: 43.9%

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	16	6	8	2	+1.8M	+34.9%
Index fund managers	2	7	0	2	−2.8M	−49.6%
Other institutions	45	33	19	19	+1.9M	+47.5%

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 Arq.

Only managers that filed a holdings report for both quarters are compared (120 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 Arq, Inc. · Insiders · Politicians