MONTAUK RENEWABLES INC (MNTK) Institutional Shareholders
MONTAUK RENEWABLES INC (MNTK) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $33.30M in MNTK holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of MNTK tracked by InsiderSet, reporting ownership valued at approximately $7.35M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $13.80M, representing an estimated gain of +87.82% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 74% of the total disclosed MNTK value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Capital Management Llc, Geode Capital Management, Llc, and several other long-term asset managers with concentrated positions in MONTAUK RENEWABLES INC (MNTK).
This page ranks the largest institutional MNTK shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
91
Total Reported Value
$33.30M
Largest Holder
Blackrock, Inc.
Largest Position
$7.35M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
115
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 4,709,893 | $7,347,434 | $13,799,986 | +$6,452,552 | +87.82% | |
| Vanguard Capital Management Llc | 0.00% | 2,706,900 | $4,222,764 | $7,931,217 | +$3,708,453 | +87.82% | |
| Geode Capital Management, Llc | 0.00% | 1,879,292 | $2,932,338 | $5,506,326 | +$2,573,988 | +87.78% | |
| Baader Bank Aktiengesellschaft | 0.20% | 1,605,000 | $2,503,800 | $4,702,650 | +$2,198,850 | +87.82% | |
| State Street Corp | 0.00% | 1,369,693 | $2,136,721 | $4,013,200 | +$1,876,479 | +87.82% | |
| Barclays Plc | 0.00% | 953,510 | $1,487,475 | $2,793,784 | +$1,306,309 | +87.82% | |
| American Century Companies Inc | 0.00% | 950,442 | $1,482,690 | $2,784,795 | +$1,302,105 | +87.82% | |
| Charles Schwab Investment Management Inc | 0.00% | 539,334 | $841,361 | $1,580,249 | +$738,888 | +87.82% | |
| Northern Trust Corp | 0.00% | 536,057 | $836,249 | $1,570,647 | +$734,398 | +87.82% | |
| Vanguard Portfolio Management Llc | 0.00% | 469,053 | $731,723 | $1,374,325 | +$642,602 | +87.82% | |
| Dimensional Fund Advisors Lp | 0.00% | 448,818 | $700,155 | $1,315,037 | +$614,882 | +87.82% | |
| Vanguard Fiduciary Trust Co | 0.00% | 438,777 | $684,492 | $1,285,617 | +$601,125 | +87.82% | |
| Hosking Partners Llp | 0.02% | 390,517 | $609,207 | $1,144,215 | +$535,008 | +87.82% | |
| First Trust Advisors Lp | 0.00% | 381,889 | $595,746 | $1,118,935 | +$523,189 | +87.82% | |
| Goldman Sachs Group Inc | 0.00% | 377,277 | $588,551 | $1,105,422 | +$516,871 | +87.82% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 364,800 | $569,088 | $1,068,864 | +$499,776 | +87.82% |
| Jpmorgan Chase & Co | 0.00% | 270,982 | $422,732 | $793,977 | +$371,245 | +87.82% | |
| Aqr Capital Management Llc | 0.00% | 238,152 | $371,517 | $697,785 | +$326,268 | +87.82% | |
| Gsa Capital Partners Llp | 0.02% | 201,055 | $314,000 | $589,091 | +$275,091 | +87.61% | |
| Jtc Employer Solutions Trustee Ltd | 0.02% | 197,859 | $311,000 | $579,727 | +$268,727 | +86.41% | |
| Bank Of New York Mellon Corp | 0.00% | 195,907 | $305,615 | $574,008 | +$268,393 | +87.82% | |
| Morgan Stanley | 0.00% | 167,182 | $260,805 | $489,843 | +$229,038 | +87.82% | |
| Nuveen, Llc | 0.00% | 162,044 | $252,788 | $474,789 | +$222,001 | +87.82% | |
| Caprock Group, Llc | 0.00% | 119,801 | $186,890 | $351,017 | +$164,127 | +87.82% | |
| J. Derek Lewis & Associates Inc. | 0.03% | 106,500 | $166,140 | $312,045 | +$145,905 | +87.82% | |
| Alliancebernstein L.P. | 0.00% | 142,138 | $163,459 | $416,464 | +$253,005 | +154.78% | |
| D. E. Shaw & Co., Inc. | 0.00% | 101,497 | $158,335 | $297,386 | +$139,051 | +87.82% | |
| Rhumbline Advisers | 0.00% | 94,756 | $147,811 | $277,635 | +$129,824 | +87.83% | |
| Rathbones Group Plc | 0.00% | 92,000 | $143,520 | $269,560 | +$126,040 | +87.82% | |
| Storebrand Asset Management As | 0.00% | 88,075 | $137,397 | $258,060 | +$120,663 | +87.82% | |
| Acadian Asset Management Llc | 0.00% | 81,760 | $126,000 | $239,557 | +$113,557 | +90.12% | |
| Marshall Wace, Llp | 0.00% | 80,526 | $125,621 | $235,941 | +$110,320 | +87.82% | |
| Ubs Group Ag | 0.00% | 68,630 | $107,063 | $201,086 | +$94,023 | +87.82% | |
| Citadel Advisors Llc | 0.00% | 58,826 | $91,769 | $172,360 | +$80,591 | +87.82% | |
| Wells Fargo & Company/Mn | 0.00% | 58,510 | $91,276 | $171,434 | +$80,158 | +87.82% | |
| Russell Investments Group, Ltd. | 0.00% | 56,498 | $88,099 | $165,539 | +$77,440 | +87.90% | |
| Strs Ohio | 0.00% | 48,800 | $76,128 | $142,984 | +$66,856 | +87.82% | |
| Deutsche Bank Ag\ | 0.00% | 48,632 | $75,865 | $142,492 | +$66,627 | +87.82% | |
| Bank Of America Corp | 0.00% | 45,075 | $70,317 | $132,070 | +$61,753 | +87.82% | |
| Millennium Management Llc | 0.00% | 43,455 | $67,790 | $127,323 | +$59,533 | +87.82% | |
| Prudential Financial Inc | 0.00% | 40,010 | $62,416 | $117,229 | +$54,813 | +87.82% | |
| Invesco Ltd. | 0.00% | 35,879 | $55,972 | $105,125 | +$49,153 | +87.82% | |
| Price T Rowe Associates Inc | 0.00% | 33,876 | $53,000 | $99,257 | +$46,257 | +87.28% | |
| Ieq Capital, Llc | 0.00% | 33,113 | $51,656 | $97,021 | +$45,365 | +87.82% | |
| Arrowstreet Capital, Limited Partnership | 0.00% | 32,288 | $50,369 | $94,604 | +$44,235 | +87.82% | |
| Citigroup Inc | 0.00% | 31,759 | $49,544 | $93,054 | +$43,510 | +87.82% | |
| Mirae Asset Global Etfs Holdings Ltd. | 0.00% | 31,543 | $49,207 | $92,421 | +$43,214 | +87.82% | |
| Vanguard Global Advisers, Llc | 0.00% | 23,853 | $37,211 | $69,889 | +$32,678 | +87.82% | |
| Vontobel Holding Ltd. | 0.00% | 17,860 | $27,862 | $52,330 | +$24,468 | +87.82% | |
| Intech Investment Management Llc | 0.00% | 17,643 | $27,523 | $51,694 | +$24,171 | +87.82% |
Frequently asked questions about MNTK
Who owns the most MNTK stock?
The largest holders of MNTK are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for MONTAUK RENEWABLES INC (MNTK).
Is MNTK widely held by superinvestors?
Many widely followed stocks like MNTK appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly MNTK is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.