Montauk Renewables, Inc.: which funds bought and sold

Institutions that bought and sold Montauk Renewables 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, 51 institutions that filed 13F reports for both quarters added to or opened positions in Montauk Renewables, and 39 cut or closed them. Together they added a net 473K shares, +2.3% on what they held at the start of the quarter. Active managers and hedge funds on our list were net sellers of 70K shares (−2.6%); index fund managers were net buyers of 771K shares (+6.4%). 13 opened a new position and 13 sold out entirely.

Bought, Q2 2026 51 institutions, 13 of them new holders Sold, Q2 2026 39 institutions, 13 of them sold out

Net change, all compared +473K shares (+2.3%)

Net change, active managers −70K shares (−2.6%), 7 bought, 12 sold

Buyers versus sellers

institutions compared, 104

51 bought 14 39 sold

Active managers and hedge funds 7 bought · 12 sold · −70K

Index fund managers 9 bought · 0 sold · +771K

Other institutions 35 bought · 27 sold · −228K

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Blackrock, Inc. Index funds	+491K +11.6%	4.7M	$7.3M
AQR Capital Management LLC Hedge fund	+200K +521.0%	238K	$371,517
Geode Capital Management, LLC Index funds	+120K +6.8%	1.9M	$2.9M
Caprock Group, LLC	+120K New position	120K	$186,890
Jpmorgan Chase & Co	+109K +67.0%	271K	$422,732
Vanguard Portfolio Management LLC Index funds	+80K +20.6%	469K	$731,723
First Trust Advisors LP	+70K +22.4%	382K	$595,746
Citadel Advisors LLC Hedge fund	+59K New position	59K	$91,769
Goldman Sachs Group Inc	+46K +13.9%	377K	$588,551
Alliancebernstein L.P. Active manager	+45K +45.8%	142K	$163,459
Wells Fargo & Company	+33K +132.1%	59K	$91,276
Ieq Capital, LLC	+33K New position	33K	$51,656
Northern Trust Corp Index funds	+31K +6.1%	536K	$836,249
UBS Group AG	+27K +63.9%	69K	$107,063
Acadian Asset Management LLC Active manager	+26K +45.7%	82K	$126,000
Russell Investments Group, Ltd.	+25K +80.5%	56K	$88,099
Prudential Financial Inc	+25K +170.2%	40K	$62,416
Nuveen, LLC	+22K +16.1%	162K	$252,788
J. Derek Lewis & Associates Inc.	+22K +25.3%	107K	$166,140
Charles Schwab Investment Management Inc Index funds	+19K +3.6%	539K	$841,361

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
AQR Capital Management LLC Hedge fund	+200K +521.0%	238K	$371,517
Citadel Advisors LLC Hedge fund	+59K New position	59K	$91,769
Alliancebernstein L.P. Active manager	+45K +45.8%	142K	$163,459
Acadian Asset Management LLC Active manager	+26K +45.7%	82K	$126,000
Centiva Capital, LP Hedge fund	+14K New position	14K	$22,450
Renaissance Technologies LLC Hedge fund	+10K +2.9%	365K	$569,088
FMR LLC Active manager	+529 +65.3%	1,339	$2,089

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Dimensional Fund Advisors LP	−288K −39.1%	449K	$700,155
Millennium Management LLC Hedge fund	−163K −79.0%	43K	$67,790
Marshall Wace, LLP Hedge fund	−124K −60.6%	81K	$125,621
Rathbones Group PLC	−112K −54.9%	92K	$143,520
Morgan Stanley	−94K −36.0%	167K	$260,805
Gsa Capital Partners LLP	−89K −30.6%	201K	$314,000
Barclays PLC	−85K −8.2%	954K	$1.5M
Jane Street Group, LLC	−36K Sold out	0	—
Los Angeles Capital Management LLC Active manager	−29K Sold out	0	—
Quadrature Capital Ltd Hedge fund	−27K Sold out	0	—
Susquehanna International Group, LLP	−24K Sold out	0	—
Squarepoint Ops LLC Hedge fund	−24K −66.2%	12K	$18,943
Boyer Financial Services, Inc.	−23K Sold out	0	—
Manufacturers Life Insurance Company, The	−19K Sold out	0	—
D. E. Shaw & Co., Inc. Hedge fund	−17K −14.2%	101K	$158,335
Neuberger Berman Group LLC Active manager	−17K Sold out	0	—
Two Sigma Securities, LLC	−16K Sold out	0	—
Bank Of America Corp	−16K −25.7%	45K	$70,317
Voya Investment Management LLC	−14K Sold out	0	—
Tidal Investments LLC	−12K Sold out	0	—

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Millennium Management LLC Hedge fund	−163K −79.0%	43K	$67,790
Marshall Wace, LLP Hedge fund	−124K −60.6%	81K	$125,621
Los Angeles Capital Management LLC Active manager	−29K Sold out	0	—
Quadrature Capital Ltd Hedge fund	−27K Sold out	0	—
Squarepoint Ops LLC Hedge fund	−24K −66.2%	12K	$18,943
D. E. Shaw & Co., Inc. Hedge fund	−17K −14.2%	101K	$158,335
Neuberger Berman Group LLC Active manager	−17K Sold out	0	—
Point72 Asset Management, L.P. Hedge fund	−11K Sold out	0	—
Hosking Partners LLP Active manager	−6,415 −1.6%	391K	$609,207
American Century Companies Inc Active manager	−4,026 −0.4%	950K	$1.5M

New positions

largest by value

Institution	Shares	Value June 30, 2026
Caprock Group, LLC	120K	$186,890
Citadel Advisors LLCHedge fund	59K	$91,769
Ieq Capital, LLC	33K	$51,656
Vontobel Holding Ltd.	18K	$27,862
Centiva Capital, LPHedge fund	14K	$22,450
Mariner, LLC	14K	$21,193
Wealth Enhancement Advisory Services, LLC	10K	$16,635
Cerity Partners LLC	10K	$16,290
Integrated Wealth Concepts LLC	729	$1,136
NISA Investment Advisors, LLC	700	$1,092

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Jane Street Group, LLC	36K	$39,545
Los Angeles Capital Management LLCActive manager	29K	$33,586
Quadrature Capital LtdHedge fund	27K	$30,967
Susquehanna International Group, LLP	24K	$28,169
Boyer Financial Services, Inc.	23K	$26,439
Manufacturers Life Insurance Company, The	19K	$21,812
Neuberger Berman Group LLCActive manager	17K	$19,256
Two Sigma Securities, LLC	16K	$18,939
Voya Investment Management LLC	14K	$15,748
Tidal Investments LLC	12K	$13,499

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 91
Ten largest holders: 73.5%
Index fund managers: 59.6%
Active managers and hedge funds: 12.1%

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	7	12	2	4	−70K	−2.6%
Index fund managers	9	0	0	0	+771K	+6.4%
Other institutions	35	27	11	9	−228K	−3.6%

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 Montauk Renewables.

Only managers that filed a holdings report for both quarters are compared (104 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.

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