MNTK — Montauk Renewables, Inc.
Price · 2024-08-26 → 2026-08-21
499 daily closes shownAnonymous view is capped at two years of history. A free account extends it to five, and Pro opens the whole archive back to 2021-01-22.
Performance
Technicals
Measured signals that fired on MNTK
| date | signal | measured base rate |
|---|---|---|
| 2026-08-05 | Short volume far above its own normal short | -0.76% over 21 days · t = -2.79 · n = 5,897 statistically distinguishable from its control group |
Excess return against a matched control group, on a point-in-time universe that includes delisted companies. Most families do not survive that. How the measurement works →
Insider transactions (Form 4)
| date | insider | what | shares | price | value |
|---|---|---|---|---|---|
| 2026-05-20 | Ciroli John Chief Legal Officer | Grant or award | 303.0K | 0.00 | 0 |
| 2026-05-20 | McClain Sean F President & CEO | Grant or award | 383.2K | 0.00 | 0 |
| 2026-05-20 | Van Asdalan Kevin A Chief Financial Officer | Grant or award | 303.0K | 0.00 | 0 |
| 2026-05-20 | Shaw James A Chief Operating Officer | Grant or award | 282.8K | 0.00 | 0 |
| 2026-05-11 | Copelyn John A Director | Open-market purchase | 17.5K | 1.45 | 25.4K |
| 2025-11-24 | Frank Sharon R VP Environ Health & Safety | Shares withheld for tax | 2.7K | 1.67 | 4.6K |
| 2024-11-24 | Frank Sharon R VP Environ Health & Safety | Shares withheld for tax | 2.7K | 4.46 | 12.3K |
| 2023-11-24 | Frank Sharon R VP Environ. Health & Safety | Shares withheld for tax | 2.7K | 9.09 | 24.2K |
Open-market purchases (code P) are the informative ones. Grants, option exercises and tax withholding are compensation mechanics, not decisions. How to read a Form 4 →
Largest institutional holders
| manager | value | shares |
|---|---|---|
| BlackRock, Inc. | 4.9M | 4.2M |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.1M | 2.7M |
| GEODE CAPITAL MANAGEMENT, LLC | 2.0M | 1.8M |
| Baader Bank Aktiengesellschaft | 1.8M | 1.6M |
| STATE STREET CORP | 1.6M | 1.4M |
| BARCLAYS PLC | 1.2M | 1.0M |
| AMERICAN CENTURY COMPANIES INC | 1.1M | 954.5K |
| DIMENSIONAL FUND ADVISORS LP | 847.3K | 736.6K |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 598.7K | 520.6K |
| NORTHERN TRUST CORP | 581.2K | 505.4K |
13F positions as of 2026-03-31, filed up to 45 days after quarter end. Long-only US equity — shorts and derivatives never appear. What 13F does and does not show →
Latest SEC filings
| form | filed | period | |
|---|---|---|---|
| 8-K | 2026-08-06 | 2026-08-06 | on EDGAR ↗ |
| 10-Q | 2026-08-05 | 2026-06-30 | on EDGAR ↗ |
| 8-K | 2026-08-05 | 2026-08-05 | on EDGAR ↗ |
| 8-K | 2026-05-28 | 2026-05-26 | on EDGAR ↗ |
| 4 | 2026-05-22 | 2026-05-20 | on EDGAR ↗ |
| 4 | 2026-05-22 | 2026-05-20 | on EDGAR ↗ |
| 4 | 2026-05-22 | 2026-05-20 | on EDGAR ↗ |
| 4 | 2026-05-22 | 2026-05-20 | on EDGAR ↗ |
Short selling
This is off-exchange short volume, not short interest: it is flow, not position, and 40–50% is normal because market makers short to fill your buy. Why that number misleads →
Recent headlines
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