Montauk Renewables, Inc. (MNTK) Insider Trading
Over the last 6 months, 29 institutions increased and 31 reduced their position (13F).
Insider Activity
Sentiment
50/100
Buys (3m)
0
Sells (3m)
0
Net (3m)
$0
Insider trades by month Buys Sells
Nov
May
Context3-month price -3.1%Institutions reducing (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| May 22, 2026 | Van Asdalan Kevin Aofficer: Chief Financial Officer | Grant | 302,982 | — |
| May 22, 2026 | McClain Sean Fdirector, officer: President & CEO | Grant | 383,183 | — |
| May 22, 2026 | Shaw James Aofficer: Chief Operating Officer | Grant | 282,842 | — |
| May 22, 2026 | Ciroli Johnofficer: Chief Legal Officer | Grant | 302,982 | — |
| May 13, 2026 | Copelyn John Adirector | Buy | 17,506 | $1.45 |
| Nov 26, 2025 | Frank Sharon Rofficer: VP Environ Health & Safety | Tax | 2,748 | $1.67 |
| Nov 26, 2024 | Frank Sharon Rofficer: VP Environ Health & Safety | Tax | 2,748 | $4.46 |
| Nov 27, 2023 | Frank Sharon Rofficer: VP Environ. Health & Safety | Tax | 2,658 | $9.09 |
| Sep 18, 2023 | Barsch Michaelofficer: See Remarks | Grant | 75,000 | $9.57 |
| Apr 26, 2023 | Shaw James Aofficer: Vice President of Operations | Grant | 100,000 | $6.77 |
| Apr 26, 2023 | McClain Sean Fdirector, officer: President and CEO | Grant | 200,000 | $6.77 |
| Apr 26, 2023 | Frank Sharon Rofficer: VP Environ. Health & Safety | Grant | 100,000 | $6.77 |
| Apr 26, 2023 | Ciroli Johnofficer: See Remarks | Grant | 133,334 | $6.77 |
| Apr 26, 2023 | Ciroli Johnofficer: See Remarks | Grant | 133,333 | $6.77 |
| Apr 26, 2023 | Van Asdalan Kevin Aofficer: CFO and Treasurer | Grant | 166,667 | $6.77 |
| Apr 26, 2023 | Van Asdalan Kevin Aofficer: CFO and Treasurer | Grant | 166,666 | $6.77 |
| Dec 5, 2022 | Frank Sharon Rofficer: VP Environ. Health & Safety | Tax | 2,748 | $10.01 |
| Nov 29, 2022 | McClain Sean Fofficer: President and CEO | Sell | 57,750 | $12.07 |
| Nov 29, 2022 | Hill Scott Eofficer: VP of Business Development | Sell | 2,350 | $12.68 |
| Nov 29, 2022 | Hill Scott Eofficer: VP of Business Development | Sell | 101,797 | $12.02 |
| Nov 29, 2022 | McClain Sean Fofficer: President and CEO | Sell | 2,250 | $12.68 |
| Feb 1, 2022 | Ciroli Johnofficer: VP, GC and Secretary | Tax | 87 | $10.01 |
| Feb 1, 2022 | McClain Sean Fdirector, officer: President and CEO | Tax | 87 | $10.01 |
| Feb 1, 2022 | Shaw James Aofficer: Vice President of Operations | Tax | 87 | $10.01 |
| Feb 1, 2022 | Frank Sharon Rofficer: VP Environ. Health & Safety | Tax | 87 | $10.01 |
| Feb 1, 2022 | Hill Scott Eofficer: VP of Business Development | Tax | 87 | $10.01 |
| Feb 1, 2022 | Van Asdalan Kevin Aofficer: CFO and Treasurer | Tax | 87 | $10.01 |
| Dec 1, 2021 | Frank Sharon Rofficer: VP Environ. Health & Safety | Grant | 50,000 | — |
| Jan 29, 2021 | Hill Scott Eofficer: VP of Business Development | Grant | 264 | — |
| Jan 29, 2021 | Van Asdalan Kevin Aofficer: CFO and Treasurer | Grant | 354,161 | — |
Source: MNTK SEC Form 4 filings, latest May 22, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their MNTK positions over the last 6 months (SEC Form 13F).
Increased
29
New positions
21
Reduced
31
Sold out
93
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| BLACKROCK, INC. | Reduced | 4.2M | May 13, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 2.7M | May 15, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 1.8M | May 15, 2026 |
| BAADER BANK AKTIENGESELLSCHAFT | Unchanged | 1.6M | May 8, 2026 |
| STATE STREET CORP | Reduced | 1.4M | May 15, 2026 |
| BARCLAYS PLC | Increased | 1.0M | May 15, 2026 |
| AMERICAN CENTURY COMPANIES INC | Reduced | 954K | May 15, 2026 |
| DIMENSIONAL FUND ADVISORS LP | Reduced | 737K | May 7, 2026 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | Reduced | 521K | May 15, 2026 |
| NORTHERN TRUST CORP | Increased | 505K | May 14, 2026 |
| VANGUARD FIDUCIARY TRUST CO | New Position | 432K | May 8, 2026 |
| HOSKING PARTNERS LLP | Increased | 397K | Apr 21, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New Position | 389K | May 8, 2026 |
| RENAISSANCE TECHNOLOGIES LLC | Increased | 355K | May 14, 2026 |
| GOLDMAN SACHS GROUP INC | Reduced | 331K | May 15, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.