Montauk Renewables
MNTK · NASDAQ
$2.04−$0.04 (−1.92%)TodayMarket closed ·
Prev close $2.08
Who owns MNTK
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 81.1% of MNTK’s shares.
- Copelyn (John Anthony)40.5%
- Aktiv Investment Management Pty Ltd15.7%
- Govender (Theventheran Govindsamy)12.1%
- Investec Wealth and Investment Management Pty Ltd3.6%
- Next 6 largest institutions9.2%
- All other shareholders18.9%
| Holder | Shares | % of shares |
|---|---|---|
| Copelyn (John Anthony) | 57.62M | 40.48% |
| Aktiv Investment Management Pty Ltd | 22.30M | 15.67% |
| Govender (Theventheran Govindsamy) | 17.28M | 12.14% |
| Investec Wealth and Investment Management Pty Ltd | 5.18M | 3.64% |
| BlackRock Institutional Trust Company, N.A. | 4.34M | 3.05% |
| Vanguard Capital Management, LLC | 2.71M | 1.90% |
| Geode Capital Management, L.L.C. | 1.88M | 1.32% |
| Baader Bank AG | 1.60M | 1.13% |
| State Street Investment Management (US) | 1.37M | 0.96% |
| McClain (Sean Fitzgerald) | 1.14M | 0.80% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Investec BCI Dynamic Equity Fund | 5.18M | 3.64% |
| Vanguard Total Stock Market Index Fund | 1.90M | 1.33% |
| iShares Russell 2000 ETF | 1.68M | 1.18% |
| Avantis US Small Cap Value ETF | 774.10K | 0.54% |
| Vanguard Extended Market Index Fund | 745.16K | 0.52% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders bought $25.38K (1 trade) of MNTK on the open market, with no sales.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Shaw James A | Award | 282.84K | — |
| McClain Sean F | Award | 383.18K | — |
| Van Asdalan Kevin A | Award | 302.98K | — |
| Ciroli John | Award | 302.98K | — |
| Copelyn John A | Buy | 17.51K | $25.38K |
Short interest
Settled Sep 30, 2026
- Shares short
- 1.91M
- Days to cover
- 1.93
- % of shares outstanding
- 1.34%
- Average daily volume
- 990.36K
- Change since last report
- +29.4%
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