Montauk Renewables, Inc. (MNTK) — Institutional Holders, Q2 2026
91 institutional investment managers reported a MNTK position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $33.3M. Every filer is listed below, ranked by position value. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.
MNTK in Q2 2026: what funds did
Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.
Biggest buyers
- BlackRockAdded · +490,896 sh+$765.8K
- AQR CAPITAL MANAGEMENTAdded · +199,801 sh+$311.7K
- GEODE CAPITAL MANAGEMENTAdded · +120,014 sh+$187.2K
- Caprock GroupNew · +119,801 sh+$186.9K
- JPMORGAN CHASEAdded · +108,730 sh+$169.6K
Biggest sellers
- DIMENSIONAL FUND ADVISORSTrimmed · -287,766 sh-$448.9K
- MILLENNIUM MANAGEMENTTrimmed · -163,399 sh-$254.9K
- MARSHALL WACE, LLPTrimmed · -124,110 sh-$193.6K
- MORGAN STANLEYTrimmed · -94,216 sh-$147.0K
- GSA CAPITAL PARTNERS LLPTrimmed · -88,839 sh-$138.6K
MNTK 13F holders ranked 1–91 of 91
| # | Institution | Shares | Value | % of portfolio | QoQShares vs Q1 2026 |
|---|---|---|---|---|---|
| 1 | BlackRock#1 · 4,709,893 sh | 4,709,893 | $7.3M | <0.01% | +11.6% |
| 2 | VANGUARD CAPITAL MANAGEMENT#2 · 2,706,900 sh | 2,706,900 | $4.2M | <0.01% | +0.7% |
| 3 | GEODE CAPITAL MANAGEMENT#3 · 1,879,292 sh | 1,879,292 | $2.9M | <0.01% | +6.8% |
| 4 | Baader Bank Aktiengesellschaft#4 · 1,605,000 sh | 1,605,000 | $2.5M | 0.19% | 0.0% |
| 5 | STATE STREET#5 · 1,369,693 sh | 1,369,693 | $2.1M | <0.01% | +0.3% |
| 6 | BARCLAYS PLC#6 · 953,510 sh | 953,510 | $1.5M | <0.01% | -8.2% |
| 7 | AMERICAN CENTURY COMPANIES#7 · 950,442 sh | 950,442 | $1.5M | <0.01% | -0.4% |
| 8 | CHARLES SCHWAB INVESTMENT MANAGEMENT#8 · 539,334 sh | 539,334 | $841.4K | <0.01% | +3.6% |
| 9 | NORTHERN#9 · 536,057 sh | 536,057 | $836.2K | <0.01% | +6.1% |
| 10 | VANGUARD PORTFOLIO MANAGEMENT#10 · 469,053 sh | 469,053 | $731.7K | 0.00% | +20.6% |
| 11 | DIMENSIONAL FUND ADVISORS#11 · 448,818 sh | 448,818 | $700.2K | <0.01% | -39.1% |
| 12 | VANGUARD FIDUCIARY#12 · 438,777 sh | 438,777 | $684.5K | <0.01% | +1.5% |
| 13 | Hosking Partners LLP#13 · 390,517 sh | 390,517 | $609.2K | — | -1.6% |
| 14 | FIRST ADVISORS#14 · 381,889 sh | 381,889 | $595.7K | <0.01% | +22.4% |
| 15 | GOLDMAN SACHS GROUP#15 · 377,277 sh | 377,277 | $588.6K | <0.01% | +13.9% |
| 16 | RENAISSANCE TECHNOLOGIES#16 · 364,800 sh | 364,800 | $569.1K | <0.01% | +2.9% |
| 17 | JPMORGAN CHASE#17 · 270,982 sh | 270,982 | $422.7K | 0.00% | +67.0% |
| 18 | AQR CAPITAL MANAGEMENT#18 · 238,152 sh | 238,152 | $371.5K | <0.01% | +521.0% |
| 19 | GSA CAPITAL PARTNERS LLP#19 · 201,055 sh | 201,055 | $314.0K | 0.02% | -30.6% |
| 20 | JTC Employer Solutions Trusteee Ltd#20 · 197,859 sh | 197,859 | $311.0K | 0.02% | 0.0% |
| 21 | Bank of New York Mellon#21 · 195,907 sh | 195,907 | $305.6K | <0.01% | 0.0% |
| 22 | MORGAN STANLEY#22 · 167,182 sh | 167,182 | $260.8K | 0.00% | -36.0% |
| 23 | Nuveen#23 · 162,044 sh | 162,044 | $252.8K | <0.01% | +16.1% |
| 24 | Caprock Group#24 · 119,801 sh | 119,801 | $186.9K | <0.01% | New |
| 25 | J. Derek Lewis & Associates#25 · 106,500 sh | 106,500 | $166.1K | 0.03% | New |
| 26 | ALLIANCEBERNSTEIN L.P.#26 · 142,138 sh | 142,138 | $163.5K | <0.01% | +45.8% |
| 27 | D. E. Shaw#27 · 101,497 sh | 101,497 | $158.3K | <0.01% | -14.2% |
| 28 | RHUMBLINE ADVISERS#28 · 94,756 sh | 94,756 | $147.8K | <0.01% | +1.8% |
| 29 | Rathbones Group PLC#29 · 92,000 sh | 92,000 | $143.5K | <0.01% | -9.8% |
| 30 | STOREBRAND ASSET MANAGEMENT AS#30 · 88,075 sh | 88,075 | $137.4K | <0.01% | +7.2% |
| 31 | ACADIAN ASSET MANAGEMENT#31 · 81,760 sh | 81,760 | $126.0K | <0.01% | +45.7% |
| 32 | MARSHALL WACE, LLP#32 · 80,526 sh | 80,526 | $125.6K | <0.01% | -60.6% |
| 33 | UBS Group AG#33 · 68,630 sh | 68,630 | $107.1K | 0.00% | +63.9% |
| 34 | CITADEL ADVISORS#34 · 58,826 sh | 58,826 | $91.8K | 0.00% | New |
| 35 | WELLS FARGO & COMPANY#35 · 58,510 sh | 58,510 | $91.3K | 0.00% | +132.1% |
| 36 | Russell Investments Group, Ltd.#36 · 56,498 sh | 56,498 | $88.1K | <0.01% | +80.5% |
| 37 | STRS OHIO#37 · 48,800 sh | 48,800 | $76.1K | <0.01% | +22.0% |
| 38 | DEUTSCHE BANK AG\#38 · 48,632 sh | 48,632 | $75.9K | 0.00% | +3.5% |
| 39 | BANK OF AMERICA#39 · 45,075 sh | 45,075 | $70.3K | 0.00% | -25.7% |
| 40 | MILLENNIUM MANAGEMENT#40 · 43,455 sh | 43,455 | $67.8K | 0.00% | -79.0% |
| 41 | PRUDENTIAL FINANCIAL#41 · 40,010 sh | 40,010 | $62.4K | <0.01% | +170.2% |
| 42 | Invesco Ltd.#42 · 35,879 sh | 35,879 | $56.0K | 0.00% | -3.9% |
| 43 | PRICE T ROWE ASSOCIATES#43 · 33,876 sh | 33,876 | $53.0K | 0.00% | 0.0% |
| 44 | IEQ CAPITAL#44 · 33,113 sh | 33,113 | $51.7K | <0.01% | New |
| 45 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP#45 · 32,288 sh | 32,288 | $50.4K | 0.00% | 0.0% |
| 46 | CITIGROUP#46 · 31,759 sh | 31,759 | $49.5K | 0.00% | +101.2% |
| 47 | MIRAE ASSET GLOBAL ETFS Ltd.#47 · 31,543 sh | 31,543 | $49.2K | <0.01% | -4.1% |
| 48 | Vanguard Global Advisers#48 · 23,853 sh | 23,853 | $37.2K | 0.00% | 0.0% |
| 49 | Vontobel Holding Ltd.#49 · 17,860 sh | 17,860 | $27.9K | — | New |
| 50 | INTECH INVESTMENT MANAGEMENT#50 · 17,643 sh | 17,643 | $27.5K | <0.01% | -0.6% |
| 51 | Engineers Gate Manager#51 · 16,567 sh | 16,567 | $25.8K | <0.01% | -11.1% |
| 52 | Police & Firemen's Retirement System of New Jersey#52 · 16,326 sh | 16,326 | $25.5K | <0.01% | 0.0% |
| 53 | Centiva Capital#53 · 14,391 sh | 14,391 | $22.4K | <0.01% | New |
| 54 | ROYAL BANK OF CANADA#54 · 14,219 sh | 14,219 | $22.0K | 0.00% | +372.7% |
| 55 | Mariner#55 · 13,585 sh | 13,585 | $21.2K | 0.00% | New |
| 56 | Tower Research Capital (TRC)#56 · 13,213 sh | 13,213 | $20.6K | <0.01% | -23.3% |
| 57 | Squarepoint Ops#57 · 12,143 sh | 12,143 | $18.9K | 0.00% | -66.2% |
| 58 | WEALTH ENHANCEMENT ADVISORY SERVICES#58 · 10,332 sh | 10,332 | $16.6K | — | New |
| 59 | JONES FINANCIAL COMPANIES LLLP#59 · 11,000 sh | 11,000 | $16.6K | 0.00% | +18.8% |
| 60 | BNP PARIBAS FINANCIAL MARKETS#60 · 10,464 sh | 10,464 | $16.3K | 0.00% | -28.8% |
| 61 | Cerity Partners#61 · 10,442 sh | 10,442 | $16.3K | 0.00% | New |
| 62 | XTX Topco Ltd#62 · 10,105 sh | 10,105 | $15.8K | <0.01% | -28.7% |
| 63 | N.E.W. Advisory Services#63 · 10,000 sh | 10,000 | $15.6K | <0.01% | 0.0% |
| 64 | Ameritas Investment Partners#64 · 6,625 sh | 6,625 | $10.3K | <0.01% | 0.0% |
| 65 | Legal & General Group Plc#65 · 5,771 sh | 5,771 | $9.0K | 0.00% | 0.0% |
| 66 | NEW YORK STATE COMMON RETIREMENT FUND#66 · 3,365 sh | 3,365 | $5.2K | 0.00% | 0.0% |
| 67 | Ninety One SA (PTY) Ltd#67 · 3,110 sh | 3,110 | $4.9K | — | 0.0% |
| 68 | SRS Capital Advisors#68 · 2,551 sh | 2,551 | $4.0K | 0.00% | New |
| 69 | FMR#69 · 1,339 sh | 1,339 | $2.1K | 0.00% | +65.3% |
| 70 | TOWARZYSTWO FUNDUSZY INWESTYCYJNYCH PZU SA#70 · 1,200 sh | 1,200 | $1.9K | <0.01% | 0.0% |
| 71 | Sterling Capital Management#71 · 1,045 sh | 1,045 | $1.6K | — | -43.4% |
| 72 | SIMPLEX TRADING#72 · 864 sh | 864 | $1.3K | 0.00% | -82.4% |
| 73 | Integrated Wealth Concepts#73 · 729 sh | 729 | $1.1K | 0.00% | New |
| 74 | NISA INVESTMENT ADVISORS#74 · 700 sh | 700 | $1.1K | — | New |
| 75 | Allworth Financial#75 · 678 sh | 678 | $1.1K | 0.00% | New |
| 76 | EverSource Wealth Advisors#76 · 558 sh | 558 | $871.00 | 0.00% | +548.8% |
| 77 | Essential Partners#77 · 388 sh | 388 | $605.00 | — | +107.5% |
| 78 | GAMMA Investing#78 · 263 sh | 263 | $410.00 | — | -22.4% |
| 79 | Zurcher Kantonalbank (Zurich Cantonalbank)#79 · 246 sh | 246 | $384.00 | 0.00% | -96.9% |
| 80 | IFP Advisors#80 · 191 sh | 191 | $298.00 | — | +1.6% |
| 81 | True Wealth Design#81 · 152 sh | 152 | $238.00 | — | +166.7% |
| 82 | Farther Finance Advisors#82 · 152 sh | 152 | $237.00 | — | +85.4% |
| 83 | PNC FINANCIAL SERVICES GROUP#83 · 136 sh | 136 | $212.00 | 0.00% | +2.3% |
| 84 | ROTHSCHILD INVESTMENT#84 · 109 sh | 109 | $170.00 | 0.00% | +336.0% |
| 85 | SJS Investment Consulting#85 · 16 sh | 16 | $25.00 | — | New |
| 86 | SBI Securities , Ltd.#86 · 15 sh | 15 | $23.00 | — | -87.1% |
| 87 | JPL Wealth Management#87 · 9 sh | 9 | $15.00 | 0.00% | New |
| 88 | Clearstead Advisors#88 · 9 sh | 9 | $15.00 | 0.00% | New |
| 89 | Optiver Holding B.V.#89 · 4 sh | 4 | $6.00 | 0.00% | -99.4% |
| 90 | Caitong International Asset Management , Ltd#90 · 2 sh | 2 | $3.00 | 0.00% | 0.0% |
| 91 | CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM#91 · 943 sh | 943 | — | — | -74.1% |
Funds that sold out of MNTK in Q2 2026 (14)
Held MNTK at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.
| Institution | Shares sold | Value in Q1 2026 |
|---|---|---|
| JANE STREET GROUP35,576 sh | 35,576 | $39.5K |
| LOS ANGELES CAPITAL MANAGEMENT29,205 sh | 29,205 | $33.6K |
| Quadrature Capital Ltd26,928 sh | 26,928 | $31.0K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP24,495 sh | 24,495 | $28.2K |
| Boyer Financial Services22,990 sh | 22,990 | $26.4K |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE18,967 sh | 18,967 | $21.8K |
| Neuberger Berman Group16,744 sh | 16,744 | $19.3K |
| TWO SIGMA SECURITIES16,469 sh | 16,469 | $18.9K |
| VOYA INVESTMENT MANAGEMENT13,694 sh | 13,694 | $15.7K |
| Toroso Investments11,738 sh | 11,738 | $13.5K |
| Point72 Asset Management, L.P.10,871 sh | 10,871 | $12.5K |
| OSAIC4,000 sh | 4,000 | $4.6K |
| MAI Capital Management21 sh | 21 | $25.00 |
| Covestor Ltd64 sh | 64 | $0.00 |
Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.