Institutional HoldersBeta

Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.

Montauk Renewables, Inc.

CIK 0001826600MNTK· quarter ending 2026-06-30

Shares outstanding

142,341,139

as of 2026-07-31 · 10-Q cover page, filed 2026-08-05

Held by 13F filers

21,380,964

15.0% of shares outstanding

Holders

-4 vs 2026-03-31 · 12 new, 16 exited

Value

$33.3M

shares +2.2% vs prior quarter

Share classes (cover page of the 10-Q filed 2026-08-05, as of 2026-07-31)

Class	Listed	Shares outstanding	Held by 13F filers	% of class	Holders	CUSIP
Common stock	MNTK · NASDAQ	142,341,139	21,380,964	15.0%	90	61218C103

Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.

Securities (CUSIPs held in 13F this quarter)

tick to combine

Count	CUSIP	Class (as filers write it)	Holders	Shares held	Class shares	% of class	Value	Options	Mapped via
	61218C103	COM	90	21,380,964	142,341,139	15.0%	$33.3M	—	13DG	holders →

Totals combine the ticked CUSIPs and update as you tick: common-stock classes by default; preferreds, notes, warrants and depositary shares are listed but not counted. "holders →" shows a single CUSIP on its own. Bonds are held as a principal amount, not shares. Options positions are never counted as holdings.

Top holders (90 of 90 · 61218C103)

change vs 2026-03-31

#	Filer	Shares	% of class	Value	Change
1	BlackRock, Inc.	4,709,893	3.31%	$7.3M	+490,896 (+11.6%)
2	VANGUARD CAPITAL MANAGEMENT LLC	2,706,900	1.90%	$4.2M	+18,186 (+0.7%)
3	GEODE CAPITAL MANAGEMENT, LLC	1,879,292	1.32%	$2.9M	+120,014 (+6.8%)
4	Baader Bank Aktiengesellschaft	1,605,000	1.13%	$2.5M	—
5	STATE STREET CORP	1,369,693	0.96%	$2.1M	+4,220 (+0.3%)
6	BARCLAYS PLC	953,510	0.67%	$1.5M	-85,407 (-8.2%)
7	AMERICAN CENTURY COMPANIES INC	950,442	0.67%	$1.5M	-4,026 (-0.4%)
8	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	539,334	0.38%	$841K	+18,723 (+3.6%)
9	NORTHERN TRUST CORP	536,057	0.38%	$836K	+30,683 (+6.1%)
10	VANGUARD PORTFOLIO MANAGEMENT LLC	469,053	0.33%	$732K	+80,134 (+20.6%)
11	DIMENSIONAL FUND ADVISORS LP	448,818	0.32%	$700K	-287,766 (-39.1%)
12	VANGUARD FIDUCIARY TRUST CO	438,777	0.31%	$684K	+6,509 (+1.5%)
13	Hosking Partners LLP	390,517	0.27%	$609K	-6,415 (-1.6%)
14	FIRST TRUST ADVISORS LP	381,889	0.27%	$596K	+69,939 (+22.4%)
15	GOLDMAN SACHS GROUP INC	377,277	0.27%	$589K	+46,088 (+13.9%)
16	RENAISSANCE TECHNOLOGIES LLC	364,800	0.26%	$569K	+10,200 (+2.9%)
17	JPMORGAN CHASE & CO	270,982	0.19%	$423K	+108,730 (+67.0%)
18	AQR CAPITAL MANAGEMENT LLC	238,152	0.17%	$372K	+199,801 (+521.0%)
19	GSA CAPITAL PARTNERS LLP	201,055	0.14%	$314K	-88,839 (-30.6%)
20	JTC Employer Solutions Trustee Ltd	197,859	0.14%	$311K	—
21	Bank of New York Mellon Corp	195,907	0.14%	$306K	—
22	MORGAN STANLEY	167,182	0.12%	$261K	-94,216 (-36.0%)
23	Nuveen, LLC	162,044	0.11%	$253K	+22,436 (+16.1%)
24	ALLIANCEBERNSTEIN L.P.	142,138	0.10%	$163K	+44,618 (+45.8%)
25	Caprock Group, LLC	119,801	0.08%	$187K	NEW
26	J. Derek Lewis & Associates Inc.	106,500	0.07%	$166K	+21,500 (+25.3%)
27	D. E. Shaw & Co., Inc.	101,497	0.07%	$158K	-16,759 (-14.2%)
28	RHUMBLINE ADVISERS	94,756	0.07%	$148K	+1,678 (+1.8%)
29	Rathbones Group PLC	92,000	0.06%	$144K	-112,000 (-54.9%)
30	STOREBRAND ASSET MANAGEMENT AS	88,075	0.06%	$137K	+5,900 (+7.2%)
31	ACADIAN ASSET MANAGEMENT LLC	81,760	0.06%	$126K	+25,654 (+45.7%)
32	MARSHALL WACE, LLP	80,526	0.06%	$126K	-124,110 (-60.6%)
33	UBS Group AG	68,630	0.05%	$107K	+26,763 (+63.9%)
34	CITADEL ADVISORS LLC	58,826	0.04%	$92K	NEW
35	WELLS FARGO & COMPANY/MN	58,510	0.04%	$91K	+33,296 (+132.1%)
36	Russell Investments Group, Ltd.	56,498	0.04%	$88K	+25,205 (+80.5%)
37	STRS OHIO	48,800	0.03%	$76K	+8,800 (+22.0%)
38	DEUTSCHE BANK AG\	48,632	0.03%	$76K	+1,625 (+3.5%)
39	BANK OF AMERICA CORP /DE/	45,075	0.03%	$70K	-15,632 (-25.7%)
40	MILLENNIUM MANAGEMENT LLC	43,455	0.03%	$68K	-163,399 (-79.0%)
41	PRUDENTIAL FINANCIAL INC	40,010	0.03%	$62K	+25,200 (+170.2%)
42	Invesco Ltd.	35,879	0.03%	$56K	-1,460 (-3.9%)
43	PRICE T ROWE ASSOCIATES INC /MD/	33,876	0.02%	$53K	—
44	IEQ CAPITAL, LLC	33,113	0.02%	$52K	NEW
45	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	32,288	0.02%	$50K	—
46	CITIGROUP INC	31,759	0.02%	$50K	+15,978 (+101.2%)
47	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	31,543	0.02%	$49K	-1,349 (-4.1%)
48	Vanguard Global Advisers, LLC	23,853	0.02%	$37K	—
49	Vontobel Holding Ltd.	17,860	0.01%	$28K	NEW
50	INTECH INVESTMENT MANAGEMENT LLC	17,643	0.01%	$28K	-105 (-0.6%)
51	Engineers Gate Manager LP	16,567	0.01%	$26K	-2,061 (-11.1%)
52	Police & Firemen's Retirement System of New Jersey	16,326	0.01%	$25K	—
53	Centiva Capital, LP	14,391	0.01%	$22K	NEW
54	ROYAL BANK OF CANADA	14,219	0.01%	$22K	+11,211 (+372.7%)
55	Mariner, LLC	13,585	0.01%	$21K	NEW
56	Tower Research Capital LLC (TRC)	13,213	0.01%	$21K	-4,020 (-23.3%)
57	Squarepoint Ops LLC	12,143	0.01%	$19K	-23,750 (-66.2%)
58	JONES FINANCIAL COMPANIES LLLP	11,000	0.01%	$17K	+1,741 (+18.8%)
59	BNP PARIBAS FINANCIAL MARKETS	10,464	0.01%	$16K	-4,237 (-28.8%)
60	Cerity Partners LLC	10,442	0.01%	$16K	NEW
61	WEALTH ENHANCEMENT ADVISORY SERVICES, LLC	10,332	0.01%	$17K	NEW
62	XTX Topco Ltd	10,105	0.01%	$16K	-4,068 (-28.7%)
63	N.E.W. Advisory Services LLC	10,000	0.01%	$16K	—
64	Ameritas Investment Partners, Inc.	6,625	0.00%	$10K	—
65	Legal & General Group Plc	5,771	0.00%	$9K	—
66	NEW YORK STATE COMMON RETIREMENT FUND	3,365	0.00%	$5K	—
67	Ninety One SA (Pty) Ltd	3,110	0.00%	$5K	—
68	Arax Advisory Partners	2,551	0.00%	$4K	+2,546 (+50920.0%)
69	FMR LLC	1,339	0.00%	$2K	+529 (+65.3%)
70	TOWARZYSTWO FUNDUSZY INWESTYCYJNYCH PZU SA	1,200	0.00%	$2K	—
71	Sterling Capital Management LLC	1,045	0.00%	$2K	-801 (-43.4%)
72	CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	943	0.00%	$1K	-2,698 (-74.1%)
73	SIMPLEX TRADING, LLC	864	0.00%	$1K	-4,051 (-82.4%)
74	NISA INVESTMENT ADVISORS, LLC	700	0.00%	$1K	NEW
75	Allworth Financial LP	678	0.00%	$1K	+673 (+13460.0%)
76	EverSource Wealth Advisors, LLC	558	0.00%	$871	+489 (+708.7%)
77	Essential Partners LLC	388	0.00%	$605	+201 (+107.5%)
78	GAMMA Investing LLC	263	0.00%	$410	-76 (-22.4%)
79	Zurcher Kantonalbank (Zurich Cantonalbank)	246	0.00%	$384	-7,606 (-96.9%)
80	IFP Advisors, Inc	191	0.00%	$298	+3 (+1.6%)
81	Farther Finance Advisors, LLC	152	0.00%	$237	+70 (+85.4%)
82	True Wealth Design, LLC	152	0.00%	$238	+95 (+166.7%)
83	PNC Financial Services Group, Inc.	136	0.00%	$212	+3 (+2.3%)
84	ROTHSCHILD INVESTMENT LLC	109	0.00%	$170	+84 (+336.0%)
85	SJS Investment Consulting Inc.	16	0.00%	$25	NEW
86	SBI Securities Co., Ltd.	15	0.00%	$23	-101 (-87.1%)
87	Clearstead Advisors, LLC	9	0.00%	$15	NEW
88	JPL Wealth Management, LLC	9	0.00%	$15	NEW
89	Optiver Holding B.V.	4	0.00%	$6	-632 (-99.4%)
90	Caitong International Asset Management Co., Ltd	2	0.00%	$3	—

Exited since 2026-03-31 (16 filers; largest 16 shown)

JANE STREET GROUP, LLC	−35,576
LOS ANGELES CAPITAL MANAGEMENT LLC	−29,205
Quadrature Capital Ltd	−26,928
SUSQUEHANNA INTERNATIONAL GROUP, LLP	−24,495
Boyer Financial Services, Inc.	−22,990
MANUFACTURERS LIFE INSURANCE COMPANY, THE	−18,967
NEUBERGER BERMAN GROUP LLC	−16,744
TWO SIGMA SECURITIES, LLC	−16,469
VOYA INVESTMENT MANAGEMENT LLC	−13,694
Tidal Investments LLC	−11,738
Point72 Asset Management, L.P.	−10,871
OSAIC HOLDINGS, INC.	−4,000
CWM, LLC	−2,274
Covestor Ltd	−64
MAI Capital Management	−21
Sunbelt Securities, Inc.	−13

Large holders from 13D/13G (latest per reporting person, last 2 years)

Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.

Reporting person	Form	Filed	Event	Shares	% of class
Peresec Prime Brokers (Pty) Ltd	SCHEDULE 13G/A	2025-11-24	2025-11-21	35,878	—
Aktiv Investment Management (Pty) Ltd	SCHEDULE 13D	2025-11-10	2025-11-03	22,297,688	15.7%

Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.