Montauk Renewables, Inc.
MNTK- Exchange
- Nasdaq
- Industry
- Gas & Other Services Combined
- SEC CIK
- 0001826600
No open-market purchases or sales by Montauk Renewables, Inc. insiders were filed in the last 90 days; 90 institutions reported holding it in 13F filings for Q2 2026, worth $33.3M in total; no superinvestor holds it.
Holders of 5% or more of MNTK
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Montauk Renewables, Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Aktiv Investment Management (Pty) Ltd | 13D | 15.70%22.3M shares | New | Nov 10, 20251 filing | Nov 10, 2025 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
2 Schedule 13D and 13G filings on Montauk Renewables, Inc., newest first, including old-format filings without a stake.
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Montauk Renewables, Inc. shares.
No Form 144 notices for Montauk Renewables, Inc. are on file.