Montauk Renewables MNTK Institutional Ownership

NASDAQ MNTK

$2.12 +0.08 (+3.92%)

At close: Oct 21, 2026 · 4:00 PM EDT

Institutions by Trading Activity

92 Institutions

Increased 52 56.5%

Unchanged 14 15.2%

Reduced 26 28.3%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

14.93%

▲+0.47 pp QoQ

Shares Held by Institutions

21.39Mn

of 143.24Mn outstanding

▲+3.22% QoQ

Shares Outstanding

143.24Mn

121.85Mn held outside 13F filers

Institutional Investors

filed 13F for Jun 2026

▼-1 vs prior quarter

Net Shares Added (QoQ)

+667.41K

accumulated since last quarter

Value of Holdings

$43.64Mn

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

Updated Oct 11, 2026

Montauk Renewables, Inc. (NASDAQ:MNTK) counted 92 institutional investors among its 13F-reported shareholders for the quarter ended June 30, 2026.

Together they owned 14.93% of the outstanding stock in Q2 2026, up from 14.47% a quarter earlier.
Total shares held in Montauk Renewables rose 3.22% from Q1 2026, while the number of holders rose 10.84% from Q2 2025.
Of the 92 holders of MNTK in Q2 2026, 52 added to their positions, 26 reduced their stakes and 14 left their positions unchanged.
Altogether, institutional holders owned 21.39Mn MNTK shares at the end of Q2 2026, up 667.4K from the prior quarter and up 816.88K from a year earlier.
BlackRock, Inc. led 13F holders of MNTK with 4.71Mn shares as of June 30, 2026, or 3.29% of shares outstanding.
The largest position increases in MNTK for Q2 2026 were by BlackRock, Inc. (+490.9K shares), AQR Capital Management LLC (+199.8K shares), Geode Capital Management, LLC (+120.01K shares), JPMorgan Chase & Co (+108.73K shares) and Vanguard Portfolio Management LLC (+80.13K shares).
On the other side, among holders that kept a position in Montauk Renewables, the largest reductions in Q2 2026 came from Dimensional Fund Advisors LP (-287.77K shares), Millennium Management LLC (-163.4K shares), Marshall Wace, LLP (-124.11K shares), Morgan Stanley (-94.22K shares) and GSA Capital Partners LLP (-88.84K shares).
Per Business Quant data, the 10 largest holders of Montauk Renewables at the end of Q2 2026 were BlackRock, Inc. (4.71Mn shares), Vanguard Capital Management LLC (2.71Mn shares), Geode Capital Management, LLC (1.88Mn shares), Baader Bank Aktiengesellschaft (1.6Mn shares), State Street Corp (1.37Mn shares), Barclays PLC (953.51K shares), American Century Companies Inc (950.44K shares), Charles Schwab Investment Management Inc (539.33K shares), Northern Trust Corp (536.06K shares) and Vanguard Portfolio Management LLC (469.05K shares).

Form 13F Holdings

92 Institutional Holders

Report period 30 Jun, 2026

Total shares held 21.39Mn

Of outstanding 14.93%

#	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
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
20	JTC Employer Solutions Trustee Ltd	0001875645	197,859	0.14%	0	0.00%	$311

Showing 1 to 20 of 92 holders