Montauk Renewables's top three insider shareholders as of September 29, 2026 are Sean F Mcclain (President Ceo, 1.14Mn shares), Scott E Hill (Vp Of Business Development, 620.46K shares), Asdalan Kevin A Van (Chief Financial Officer, 497.49K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Sean F Mcclain | President Ceo | 1,141,172 | 0 | 1,141,172 | 35.0% | 22 May, 2026 |
| 2 | Scott E Hill | Vp Of Business Development | 620,460 | 0 | 620,460 | 19.0% | 29 Nov, 2022 |
| 3 | Asdalan Kevin A Van | Chief Financial Officer | 497,493 | 0 | 497,493 | 15.2% | 22 May, 2026 |
| 4 | James A Shaw | Chief Operating Officer | 477,387 | 0 | 477,387 | 14.6% | 22 May, 2026 |
| 5 | John Ciroli | Chief Legal Officer | 470,772 | 0 | 470,772 | 14.4% | 22 May, 2026 |
| 6 | Sharon R Frank | Vp Environ Health Safety | 39,275 | 0 | 39,275 | 1.2% | 26 Nov, 2025 |
| 7 | John A Copelyn | Director | 0 | 17,506 | 17,506 | 0.5% | 13 May, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 20 May, 2026 | Sean F Mcclain | President Ceo | Acquired A | 383,183 | $0.00 | $0 | 1,141,172 | Direct |
| 20 May, 2026 | Asdalan Kevin A Van | Chief Financial Officer | Acquired A | 302,982 | $0.00 | $0 | 497,493 | Direct |
| 20 May, 2026 | John Ciroli | Chief Legal Officer | Acquired A | 302,982 | $0.00 | $0 | 470,772 | Direct |
| 20 May, 2026 | James A Shaw | Chief Operating Officer | Acquired A | 282,842 | $0.00 | $0 | 477,387 | Direct |
| 11 May, 2026 | John A Copelyn | Director | Acquired P | 17,506 | $1.45 | $25.38K | 17,506 | Indirect |
| 24 Nov, 2025 | Sharon R Frank | Vp Environ Health Safety | Disposed F | 2,748 | $1.67 | $4.59K | 39,275 | Direct |
| 24 Nov, 2024 | Sharon R Frank | Vp Environ Health Safety | Disposed F | 2,748 | $4.46 | $12.26K | 42,023 | Direct |
| 24 Nov, 2023 | Sharon R Frank | Vp Environ. Health Safety | Disposed F | 2,658 | $9.09 | $24.16K | 44,771 | Direct |
| 15 Sep, 2023 | Michael Barsch | Officer | Acquired A | 75,000 | $0.00 | $0 | 75,000 | Direct |
| 15 Sep, 2023 | Michael Barsch | Officer | Acquired A | 75,000 | $0.00 | $0 | 75,000 | Direct |
| 15 Sep, 2023 | Michael Barsch | Officer | Acquired A | 75,000 | $0.00 | $0 | 75,000 | Direct |
| 19 Apr, 2023 | James A Shaw | Vice President Of Operations | Acquired A | 100,000 | $0.00 | $0 | 100,000 | Direct |
| 19 Apr, 2023 | Asdalan Kevin A Van | Cfo And Treasurer | Acquired A | 166,666 | $0.00 | $0 | 166,666 | Direct |
| 19 Apr, 2023 | John Ciroli | Officer | Acquired A | 133,333 | $0.00 | $0 | 133,333 | Direct |
| 19 Apr, 2023 | Sean F Mcclain | President And Ceo | Acquired A | 200,000 | $0.00 | $0 | 200,000 | Direct |
| 19 Apr, 2023 | Sharon R Frank | Vp Environ. Health Safety | Acquired A | 100,000 | $0.00 | $0 | 100,000 | Direct |
| 19 Apr, 2023 | Asdalan Kevin A Van | Cfo And Treasurer | Acquired A | 166,666 | $0.00 | $0 | 166,666 | Direct |
| 19 Apr, 2023 | John Ciroli | Officer | Acquired A | 133,333 | $0.00 | $0 | 133,333 | Direct |
| 19 Apr, 2023 | James A Shaw | Vice President Of Operations | Acquired A | 100,000 | $0.00 | $0 | 100,000 | Direct |
| 19 Apr, 2023 | Sean F Mcclain | President And Ceo | Acquired A | 200,000 | $0.00 | $0 | 200,000 | Direct |