Montauk Renewables MNTK Institutional Ownership

NASDAQ MNTK

$2.25 +0.05 (+2.27%)

At close: Sep 18, 2026 · 4:00 PM EDT

Institutions by Trading Activity

93 Institutions

Increased 53 57.0%

Unchanged 14 15.1%

Reduced 26 28.0%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

15.31%

▲+0.84 pp QoQ

Shares Held by Institutions

21.93Mn

of 143.24Mn outstanding

▲+7.03% QoQ

Shares Outstanding

143.24Mn

121.31Mn held outside 13F filers

Institutional Investors

filed 13F for Jun 2026

■0 vs prior quarter

Net Shares Added (QoQ)

+1.44Mn

accumulated since last quarter

Value of Holdings

$49.34Mn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

Montauk Renewables, Inc. (NASDAQ:MNTK) has 93 institutional investors that have filed 13F reports for the period ending June 2026.

Collectively, these holders controlled 15.3% of Montauk Renewables's outstanding shares in June 2026, up from 14.5% in March 2026.
They increased total shares held in MNTK by 7.03% quarter over quarter, and investors in Montauk Renewables increased 10.71% from a year ago.
Of these 93 funds, 53 grew their exposure to Montauk Renewables, 26 cut back, and 14 maintained positions.
Combined, these investors held 21.93Mn shares in MNTK for June 2026, up by 1.44Mn shares quarter on quarter, and up 909.98K shares year over year.
BlackRock, Inc. holds the largest position in MNTK at 4.71Mn shares as of June 30, 2026, or 3.29% of shares outstanding.
Top purchasers of MNTK stock for the quarter ending June 2026 included Sixth Street Partners Management Company, L.P. (539.33K), BlackRock, Inc. (490.9K), AQR CAPITAL MANAGEMENT LLC (199.8K), GEODE CAPITAL MANAGEMENT, LLC (120.01K), Caprock Group, LLC (119.8K).
Leading sellers of Montauk Renewables shares for the quarter ending June 2026 were DIMENSIONAL FUND ADVISORS LP (287.77K), MILLENNIUM MANAGEMENT LLC (163.4K), MARSHALL WACE, LLP (124.11K), Morgan Stanley (94.22K), GSA CAPITAL PARTNERS LLP (88.84K).
Per Business Quant data, the top 10 holders of Montauk Renewables for the quarter ending June 2026 are BlackRock, Inc. (4.71Mn), VANGUARD CAPITAL MANAGEMENT LLC (2.71Mn), GEODE CAPITAL MANAGEMENT, LLC (1.88Mn), Baader Bank Aktiengesellschaft (1.6Mn), State Street Corp (1.37Mn), Barclays Plc (953.51K), AMERICAN CENTURY COMPANIES INC (950.44K), CHARLES SCHWAB INVESTMENT MANAGEMENT INC (539.33K), Sixth Street Partners Management Company, L.P. (539.33K), Northern Trust Corp (536.06K).

Form 13F Holdings

93 Institutional Holders

Report period 30 Jun, 2026

Total shares held 21.93Mn

Of outstanding 15.31%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	4,709,893	3.29%	▲490,896	+11.64%	$7.35Mn
2	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	2,706,900	1.89%	▲18,186	+0.68%	$4.22Mn
3	GEODE CAPITAL MANAGEMENT, LLC	0001214717	1,879,292	1.31%	▲120,014	+6.82%	$2.93Mn
4	Baader Bank Aktiengesellschaft	0001542629	1,605,000	1.12%	0	0.00%	$2.50Mn
5	State Street Corp	0000093751	1,369,693	0.96%	▲4,220	+0.31%	$2.14Mn
6	Barclays Plc	0000312069	953,510	0.67%	▼85,407	-8.22%	$1.49Mn
7	AMERICAN CENTURY COMPANIES INC	0000748054	950,442	0.66%	▼4,026	-0.42%	$1.48Mn
8	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0000884546	539,334	0.38%	▲18,723	+3.60%	$841.36K
8	Sixth Street Partners Management Company, L.P.	0001812095	539,334	0.38%	▲539,334	0.00%	$841.36K
9	Northern Trust Corp	0000073124	536,057	0.37%	▲30,683	+6.07%	$836.25K
10	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	469,053	0.33%	▲80,134	+20.60%	$731.72K
11	DIMENSIONAL FUND ADVISORS LP	0000354204	448,818	0.31%	▼287,766	-39.07%	$700.16K
12	VANGUARD FIDUCIARY TRUST CO	0000933478	438,777	0.31%	▲6,509	+1.51%	$684.49K
13	Hosking Partners LLP	0001650135	390,517	0.27%	▼6,415	-1.62%	$609.21K
14	FIRST TRUST ADVISORS LP	0001125816	381,889	0.27%	▲69,939	+22.42%	$595.75K
15	Goldman Sachs Group Inc	0000886982	377,277	0.26%	▲46,088	+13.92%	$588.55K
16	RENAISSANCE TECHNOLOGIES LLC	0001037389	364,800	0.25%	▲10,200	+2.88%	$569.09K
17	Jpmorgan Chase & Co	0000019617	270,982	0.19%	▲108,730	+67.01%	$422.73K
18	AQR CAPITAL MANAGEMENT LLC	0001167557	238,152	0.17%	▲199,801	+520.98%	$371.52K
19	GSA CAPITAL PARTNERS LLP	0001362033	201,055	0.14%	▼88,839	-30.65%	$314

Showing 1 to 20 of 93 holders