MNTK · Montauk Renewables, Inc.

$1.83 -0.04 (-1.88%)

Market Cap

$261.91M

142.34M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Quarter:

Holders: 90

Total Value: $33,353,912

Total Shares: 21,380,750

Institutional Ownership Trend

22 quarters

Holder Concentration

Across 90 13F filers · Δ vs Mar 31, 2026

Top Holder

22.0%

−1.6 pts

Top 5

57.4%

+1.5 pts

Top 10

73.5%

+0.0 pts

HHI

908

Broadly held−20

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: 0

Institutional value: +62.3%

Shares held: +19.6%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Mega BlackRock, Inc.	+490,896	4,709,893
Mega AQR CAPITAL MANAGEMENT LLC	+199,801	238,152
Mega GEODE CAPITAL MANAGEMENT, LLC	+120,014	1,879,292
Mega VANGUARD PORTFOLIO MANAGEMENT LLC	+80,134	469,053
Mega FIRST TRUST ADVISORS LP	+69,939	381,889

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds
Mega DIMENSIONAL FUND ADVISORS LP	−287,766	448,818
Mega MILLENNIUM MANAGEMENT LLC	−163,399	43,455
Large MARSHALL WACE, LLP	−124,110	80,526
Mega MORGAN STANLEY	−94,216	167,182
Mid GSA CAPITAL PARTNERS LLP	−88,839	201,055

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)
Mega VANGUARD CAPITAL MANAGEMENT LLC	2,706,900	$4,222,764
Mega JPMORGAN CHASE & CO	270,982	$422,731
Mid Caprock Group, LLC	119,801	$186,889
Small J. Derek Lewis & Associates Inc.	106,500	$166,140
Mega CITADEL ADVISORS LLC	58,826	$91,768

Top Sold-Out Positions

vs Mar 31, 2026

Institution	Previously Held	Last Value (USD)
Mega JANE STREET GROUP, LLC	35,576	$40,911
Large LOS ANGELES CAPITAL MANAGEMENT LLC	29,205	$33,585
Large Quadrature Capital Ltd	26,928	$30,967
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP	24,495	$28,169
Micro Boyer Financial Services, Inc.	22,990	$26,438

Filter: New 17 Increased 34 Reduced 25 Sold out 17 Unchanged 14

Showing 90 of 90

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

BlackRock, Inc.

$7,347,430

22.03%

4,709,893

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BLACKROCK FINANCIAL MANAGEMENT INC/DE	31,700	$49,452	0.7%	Sole
BlackRock Asset Management Canada Ltd	728	$1,135	0.0%	Sole
BlackRock Investment Management, LLC	209,709	$327,146	4.5%	Sole
BLACKROCK ADVISORS LLC	132,046	$205,991	2.8%	Sole
BlackRock Fund Advisors	2,634,457	$4,109,752	55.9%	Sole
BlackRock Institutional Trust Company, N.A.	1,701,253	$2,653,954	36.1%	Sole

VANGUARD CAPITAL MANAGEMENT LLC

$4,222,764

12.66%

2,706,900

GEODE CAPITAL MANAGEMENT, LLC

$2,931,694

8.79%

1,879,292

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GEODE CAPITAL MANAGEMENT TRUST COMPANY, LLC	255,828	$399,091	13.6%	Defined
Held directly	1,623,464	$2,532,603	86.4%	Defined

Baader Bank Aktiengesellschaft

$2,503,800

7.51%

1,605,000

STATE STREET CORP

$2,136,721

6.41%

1,369,693

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
STATE STREET GLOBAL ADVISORS EUROPE LIMITED joint	1,369,693	$2,136,721	100.0%	Defined

BARCLAYS PLC

$1,487,475

4.46%

953,510

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BARCLAYS BANK PLC	9,361	$14,603	1.0%	Defined
BARCLAYS CAPITAL INC.	711	$1,109	0.1%	Defined
BARCLAYS CAPITAL SECURITIES LTD	943,438	$1,471,763	98.9%	Defined

AMERICAN CENTURY COMPANIES INC

$1,482,689

4.45%

950,442

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
AMERICAN CENTURY INVESTMENT MANAGEMENT INC	950,442	$1,482,689	100.0%	Defined

CHARLES SCHWAB INVESTMENT MANAGEMENT INC

$841,361

2.52%

539,334

NORTHERN TRUST CORP

$836,247

2.51%

536,057

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
NORTHERN TRUST CO joint	525,750	$820,169	98.1%	Defined
DWS INVESTMENT MANAGEMENT AMERICAS, INC joint	10,307	$16,078	1.9%	Other

VANGUARD PORTFOLIO MANAGEMENT LLC

$731,722

2.19%

469,053

DIMENSIONAL FUND ADVISORS LP

$700,155

2.10%

448,818

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Dimensional Fund Advisors Ltd.	6,779	$10,575	1.5%	Defined
DFA Australia Ltd.	8,299	$12,946	1.8%	Defined
Dimensional Ireland Ltd	93,434	$145,757	20.8%	Defined
Held directly	340,306	$530,877	75.8%	Sole

VANGUARD FIDUCIARY TRUST CO

$684,492

2.05%

438,777

Hosking Partners LLP

$609,206

1.83%

390,517

FIRST TRUST ADVISORS LP

$595,746

1.79%

381,889

GOLDMAN SACHS GROUP INC

$588,551

1.76%

377,277

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GOLDMAN SACHS & CO. LLC	12,181	$19,002	3.2%	Defined
GOLDMAN SACHS ASSET MANAGEMENT, L.P.	287,224	$448,069	76.1%	Defined
Goldman Sachs Trust Company, N.A. joint	77,872	$121,480	20.6%	Other

RENAISSANCE TECHNOLOGIES LLC

$569,088

1.71%

364,800

JPMORGAN CHASE & CO

$422,731

1.27%

270,982

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
JPMorgan Chase Bank, N.A.	28,398	$44,300	10.5%	Defined
J.P. Morgan Securities LLC	241,800	$377,208	89.2%	Defined
J.P. Morgan Securities plc	784	$1,223	0.3%	Defined

AQR CAPITAL MANAGEMENT LLC

$371,514

1.11%

238,152

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RF&L WEALTH MANAGEMENT, LLC	4	$6	0.0%	Other
Prism Planning Partners LLC	219	$341	0.1%	Other
Compound Planning, Inc.	12	$18	0.0%	Other
Arax Advisory Partners	2,465	$3,845	1.0%	Other
HALBERT HARGROVE GLOBAL ADVISORS, LLC	1,174	$1,831	0.5%	Other
Stokes Family Office, LLC	477	$744	0.2%	Other
Held directly	233,801	$364,729	98.2%	Defined

GSA CAPITAL PARTNERS LLP

$313,645

0.94%

201,055

JTC Employer Solutions Trustee Ltd

$308,660

0.93%

197,859

Bank of New York Mellon Corp

$305,613

0.92%

195,907

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Mellon Investments Corporation	86,958	$135,654	44.4%	Defined
The Bank of New York Mellon	108,948	$169,958	55.6%	Defined
Held directly	1	$1	0.0%	Defined

MORGAN STANLEY

$260,800

0.78%

167,182

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MORGAN STANLEY & CO INTERNATIONAL PLC	3,187	$4,971	1.9%	Defined
MORGAN STANLEY & CO. LLC	18,948	$29,558	11.3%	Defined
MORGAN STANLEY CAPITAL SERVICES, LLC	103,267	$161,096	61.8%	Defined
MORGAN STANLEY SMITH BARNEY LLC	1	$1	0.0%	Defined
PARAMETRIC PORTFOLIO ASSOCIATES LLC	41,779	$65,174	25.0%	Defined

Nuveen, LLC

$252,788

0.76%

162,044

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Nuveen Asset Management, LLC joint	1,690	$2,636	1.0%	Defined
TEACHERS ADVISORS, LLC joint	160,354	$250,152	99.0%	Defined

ALLIANCEBERNSTEIN L.P.

$221,735

0.66%

142,138

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Equitable Holdings, Inc.	142,138	$221,735	100.0%	Defined

Caprock Group, LLC

$186,889

0.56%

119,801

J. Derek Lewis & Associates Inc.

$166,140

0.50%

106,500

D. E. Shaw & Co., Inc.

$158,335

0.47%

101,497

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
D. E. Shaw Investment Management, L.L.C. joint	101,497	$158,335	100.0%	Defined

RHUMBLINE ADVISERS

$147,819

0.44%

94,756

Rathbones Group PLC

$143,520

0.43%

92,000

STOREBRAND ASSET MANAGEMENT AS

$137,397

0.41%

88,075

ACADIAN ASSET MANAGEMENT LLC

$127,545

0.38%

81,760

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Acadian Inc	81,760	$127,545	100.0%	Defined

MARSHALL WACE, LLP

$125,619

0.38%

80,526

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Marshall Wace North America L.P. joint	80,526	$125,619	100.0%	Other

UBS Group AG

$107,062

0.32%

68,630

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS AG	51,252	$79,953	74.7%	Defined
Held directly	17,378	$27,109	25.3%	Defined

CITADEL ADVISORS LLC

$91,768

0.28%

58,826

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	58,826	$91,768	100.0%	Defined

WELLS FARGO & COMPANY/MN

$91,275

0.27%

58,510

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
WELLS FARGO BANK N A	58,510	$91,275	100.0%	Defined

Russell Investments Group, Ltd.

$88,136

0.26%

56,498

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Russell Investment Management, LLC	32,385	$50,520	57.3%	Defined
Russell Investments Japan Co., LTD. joint	24,113	$37,616	42.7%	Other

STRS OHIO

$76,128

0.23%

48,800

DEUTSCHE BANK AG\

$75,865

0.23%

48,632

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
DWS INVESTMENT MANAGEMENT AMERICAS, INC	224	$349	0.5%	Defined
DWS Investments UK Ltd	48,408	$75,516	99.5%	Defined

BANK OF AMERICA CORP /DE/

$70,317

0.21%

45,075

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BANK OF AMERICA NA	45,075	$70,317	100.0%	Defined

MILLENNIUM MANAGEMENT LLC

$67,789

0.20%

43,455

PRUDENTIAL FINANCIAL INC

$62,415

0.19%

40,010

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
PGIM Quantitative Solutions LLC	40,010	$62,415	100.0%	Defined

Invesco Ltd.

$55,969

0.17%

35,879

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Invesco Advisers, Inc. joint	8,658	$13,505	24.1%	Defined
Invesco Trust Co joint	27,221	$42,464	75.9%	Defined

PRICE T ROWE ASSOCIATES INC /MD/

$52,846

0.16%

33,876

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
T. Rowe Price International Ltd	33,876	$52,846	100.0%	Defined

IEQ CAPITAL, LLC

$51,656

0.15%

33,113

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP

$50,369

0.15%

32,288

CITIGROUP INC

$49,543

0.15%

31,759

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citigroup Financial Products Inc. joint	31,759	$49,543	100.0%	Defined

MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.

$49,207

0.15%

31,543

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Global X Management CO LLC joint	31,543	$49,207	100.0%	Defined

Vanguard Global Advisers, LLC

$37,210

0.11%

23,853

Vontobel Holding Ltd.

$27,861

0.08%

17,860

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BANK VONTOBEL AG	17,860	$27,861	100.0%	Defined

INTECH INVESTMENT MANAGEMENT LLC

$27,523

0.08%

17,643

Engineers Gate Manager LP

$25,844

0.08%

16,567

Police & Firemen's Retirement System of New Jersey

$25,468

0.08%

16,326

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Mellon Capital	16,326	$25,468	100.0%	Defined

Centiva Capital, LP

$22,449

0.07%

14,391

ROYAL BANK OF CANADA

$22,180

0.07%

14,219

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RBC CMA LTD.	2,022	$3,154	14.2%	Defined
RBC Capital Markets, LLC	12,196	$19,025	85.8%	Defined
Held directly	1	$1	0.0%	Sole

Mariner, LLC

$21,192

0.06%

13,585

Tower Research Capital LLC (TRC)

$20,612

0.06%

13,213

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Latour Trading LLC (Latour)	13,213	$20,612	100.0%	Defined

Squarepoint Ops LLC

$18,943

0.06%

12,143

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Squarepoint Capital LLP	12,143	$18,943	100.0%	Defined

JONES FINANCIAL COMPANIES LLLP

$17,160

0.05%

11,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Edward D. Jones & Co., L.P.	11,000	$17,160	100.0%	Sole

BNP PARIBAS ARBITRAGE, SA

$16,323

0.05%

10,464

Cerity Partners LLC

$16,289

0.05%

10,442

WEALTH ENHANCEMENT ADVISORY SERVICES, LLC

$16,117

0.05%

10,332

XTX Topco Ltd

$15,763

0.05%

10,105

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
XTX EXECUTION SERVICES LLC joint	10,105	$15,763	100.0%	Defined

N.E.W. Advisory Services LLC

$15,600

0.05%

10,000

Ameritas Investment Partners, Inc.

$10,335

0.03%

6,625

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
EATON VANCE MANAGEMENT	6,625	$10,335	100.0%	Other

Legal & General Group Plc

$9,002

0.03%

5,771

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Legal & General Investment Management America Inc	5,771	$9,002	100.0%	Defined

NEW YORK STATE COMMON RETIREMENT FUND

$5,249

0.02%

3,365

Ninety One SA (Pty) Ltd

$4,851

0.01%

3,110

Arax Advisory Partners

$3,979

0.01%

2,551

FMR LLC

$2,088

0.01%

1,339

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Fidelity Management & Research Co LLC	1,339	$2,088	100.0%	Defined

TOWARZYSTWO FUNDUSZY INWESTYCYJNYCH PZU SA

$1,872

0.01%

1,200

Sterling Capital Management LLC

$1,630

0.00%

1,045

SIMPLEX TRADING, LLC

$1,347

0.00%

864

Integrated Wealth Concepts LLC

$1,137

0.00%

729

NISA INVESTMENT ADVISORS, LLC

$1,092

0.00%

700

Allworth Financial LP

$1,057

0.00%

678

EverSource Wealth Advisors, LLC

$868

0.00%

558

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BMSS Wesson Wealth Solutions, LLC	33	$50	5.8%	Sole
Held directly	525	$818	94.2%	Sole

Essential Partners LLC

$605

0.00%

388

GAMMA Investing LLC

$410

0.00%

263

Zurcher Kantonalbank (Zurich Cantonalbank)

$383

0.00%

246

IFP Advisors, Inc

$297

0.00%

191

True Wealth Design, LLC

$237

0.00%

152

Farther Finance Advisors, LLC

$237

0.00%

152

PNC FINANCIAL SERVICES GROUP, INC.

$212

0.00%

136

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
PNC Bank, National Association	136	$212	100.0%	Defined

ROTHSCHILD INVESTMENT LLC

$170

0.00%

109

SJS Investment Consulting Inc.

$24

0.00%

SBI Securities Co., Ltd.

$23

0.00%

Clearstead Advisors, LLC

$14

0.00%

JPL Wealth Management, LLC

$14

0.00%

Optiver Holding B.V.

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Optiver VOF	4	$6	100.0%	Defined

Caitong International Asset Management Co., Ltd

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	35,571	$40,906	100.0%	Defined
Jane Street Global Trading, LLC	5	$5	0.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Quadrature US Inc.	26,928	$30,967	100.0%	Other

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	24,495	$28,169	100.0%	Other

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MANULIFE FINANCIAL CORP joint	18,967	$21,812	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Voya Investment Management Co. LLC joint	13,694	$15,748	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
OSAIC WEALTH, INC.	4,000	$4,600	100.0%	Defined

Key facts CIK 1826600 CUSIP 61218C103 13F (30d) 80 filings 80 filers Visit website Investor relations