Montauk Renewables, Inc. (MNTK) ownership: Top institutional holder: VANGUARD GROUP INC ($5.89M). Insider activity: Net Seller (0 buys, 5 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| VANGUARD GROUP INC | 3528926.00 | $5.89M | 2025-12-31 |
| BlackRock, Inc. | 4218997.00 | $4.85M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 2688714.00 | $3.09M | 2026-03-31 |
| GEODE CAPITAL MANAGEMENT, LLC | 1759278.00 | $2.02M | 2026-03-31 |
| Baader Bank Aktiengesellschaft | 1605000.00 | $1.85M | 2026-03-31 |
| STATE STREET CORP | 1365473.00 | $1.57M | 2026-03-31 |
| BARCLAYS PLC | 1038917.00 | $1.19M | 2026-03-31 |
| AMERICAN CENTURY COMPANIES INC | 954468.00 | $1.10M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-05-20 | |
| Sell | null | 2026-05-20 | |
| Sell | null | 2026-05-20 | |
| Sell | null | 2026-05-20 | |
| Sell | null | 2026-05-11 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.