MONTAUK RENEWABLES INC (MNTK) Institutional Ownership Changes & 13F Activity
MONTAUK RENEWABLES INC (MNTK). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Aqr Capital Management Llc, Millennium Management Llc, Marshall Wace, Llp, Morgan Stanley, and Barclays Plc.
| Institution | Type | Change in shares | Change Position % | Shares | Reported stock balance | Portfolio quarter | Filing date |
|---|---|---|---|---|---|---|---|
| Citadel Advisors Llc | Buy | +58,826 | — | 58,826 | $91.77K | Q2 2026 | Sep 02, 2026 |
| California State Teachers Retirement System | Sell | -2,698 | -74.1% | 943 | $1.47K | Q2 2026 | Aug 24, 2026 |
| Aqr Capital Management Llc | Buy | +199,801 | +521.0% | 238,152 | $371.52K | Q2 2026 | Aug 14, 2026 |
| Millennium Management Llc | Sell | -163,399 | -79.0% | 43,455 | $67.79K | Q2 2026 | Aug 14, 2026 |
| Barclays Plc | Sell | -85,407 | -8.2% | 953,510 | $1.49M | Q2 2026 | Aug 14, 2026 |
| Goldman Sachs Group Inc | Buy | +46,088 | +13.9% | 377,277 | $588.55K | Q2 2026 | Aug 14, 2026 |
| Alliancebernstein L.P. | Buy | +44,618 | +45.8% | 142,138 | $163.46K | Q2 2026 | Aug 14, 2026 |
| Invesco Ltd. | Buy | +35,879 | — | 35,879 | $55.97K | Q2 2026 | Aug 14, 2026 |
| Wells Fargo & Company/Mn | Buy | +33,296 | +132.1% | 58,510 | $91.28K | Q2 2026 | Aug 14, 2026 |
| Squarepoint Ops Llc | Sell | -23,750 | -66.2% | 12,143 | $18.94K | Q2 2026 | Aug 14, 2026 |
| Charles Schwab Investment Management Inc | Buy | +18,723 | +3.6% | 539,334 | $841.36K | Q2 2026 | Aug 14, 2026 |
| D. E. Shaw & Co., Inc. | Sell | -16,759 | -14.2% | 101,497 | $158.34K | Q2 2026 | Aug 14, 2026 |
| Bank Of America Corp | Sell | -15,632 | -25.7% | 45,075 | $70.32K | Q2 2026 | Aug 14, 2026 |
| Royal Bank Of Canada | Buy | +11,211 | +372.7% | 14,219 | $22.00K | Q2 2026 | Aug 14, 2026 |
| Cerity Partners Llc | Buy | +10,442 | — | 10,442 | $16.29K | Q2 2026 | Aug 14, 2026 |
| Xtx Topco Ltd | Sell | -4,068 | -28.7% | 10,105 | $15.76K | Q2 2026 | Aug 14, 2026 |
| Engineers Gate Manager Lp | Sell | -2,061 | -11.1% | 16,567 | $25.84K | Q2 2026 | Aug 14, 2026 |
| Jones Financial Companies Lllp | Buy | +1,741 | +18.8% | 11,000 | $16.61K | Q2 2026 | Aug 14, 2026 |
| Mirae Asset Global Etfs Holdings Ltd. | Sell | -1,349 | -4.1% | 31,543 | $49.21K | Q2 2026 | Aug 14, 2026 |
| Jpl Wealth Management, Llc | Buy | +9 | — | 9 | $15.00 | Q2 2026 | Aug 14, 2026 |
| Marshall Wace, Llp | Sell | -124,110 | -60.6% | 80,526 | $125.62K | Q2 2026 | Aug 13, 2026 |
| Morgan Stanley | Sell | -94,216 | -36.0% | 167,182 | $260.81K | Q2 2026 | Aug 13, 2026 |
| Vanguard Portfolio Management Llc | Buy | +80,134 | +20.6% | 469,053 | $731.72K | Q2 2026 | Aug 13, 2026 |
| Northern Trust Corp | Buy | +30,683 | +6.1% | 536,057 | $836.25K | Q2 2026 | Aug 13, 2026 |
| Ubs Group Ag | Buy | +26,763 | +63.9% | 68,630 | $107.06K | Q2 2026 | Aug 13, 2026 |
| Acadian Asset Management Llc | Buy | +25,654 | +45.7% | 81,760 | $126.00K | Q2 2026 | Aug 13, 2026 |
| Vanguard Capital Management Llc | Buy | +18,186 | +0.7% | 2,706,900 | $4.22M | Q2 2026 | Aug 13, 2026 |
| Centiva Capital, Lp | Buy | +14,391 | — | 14,391 | $22.45K | Q2 2026 | Aug 13, 2026 |
| Mariner, Llc | Buy | +13,585 | — | 13,585 | $21.19K | Q2 2026 | Aug 13, 2026 |
| Renaissance Technologies LLC | Buy | +10,200 | +2.9% | 364,800 | $569.09K | Q2 2026 | Aug 13, 2026 |
Frequently asked questions about MNTK activity
Which institutional owners are buying MNTK?
Institutional owners buying MNTK include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.
What does "buy" mean in MNTK activity?
"Buy" means an investor increased their reported position in MNTK compared to the prior reporting period. This reflects growing exposure to MONTAUK RENEWABLES INC (MNTK) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in MNTK increasing?
Institutional interest in MNTK can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.
Related MNTK Institutional Insights
- MNTK Overview
- MNTK 13F Institutional Holders
- MNTK Top Institutional Shareholders
- Utilities Sector Institutional Ownership
- Utilities Sector Portfolio Overlap
- Institutional Portfolio Overlap & Shared Holdings
- Most Bought Utilities Stocks By Institutional Investors
- Most Sold Utilities Stocks By Institutional Investors
- MNTK Insider Trading & SEC Form 4 Activity
- MNTK Articles
- Top Institutional Investor Stock Rankings