As of November 6, 2026, one holder's latest Schedule 13D or 13G filing report owning 5% or more of Montauk Renewables, Inc. The largest reported stake is Aktiv Investment Management (Pty) Ltd's, at 15.7%. 2 filings are on record since November 10, 2025 (Schedule 13D, November 10, 2025).
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Montauk Renewables, Inc. has 2 Schedule 13D or 13G filings on record since 2025-11-10. 1 holder's latest filing reports 5% or more of common stock. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Aktiv Investment Management (Pty) Ltd | 15.7% | 22,297,688 | SCHEDULE 13D, 2025-11-10 | 2025-11-03 |
| Peresec Prime Brokers (Pty) Ltd | 35,878 | SCHEDULE 13G/A, 2025-11-24 | 2025-11-21 |
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Aktiv Investment Management (Pty) Ltd | 22,297,688 | 0 | 22,297,688 | 0 | SCHEDULE 13D, 2025-11-10 |
| Peresec Prime Brokers (Pty) Ltd | 35,878 | — | — | — | SCHEDULE 13G/A, 2025-11-24 |
The latest filing names Montauk Renewables, Inc., with its principal executive office as 5313 CAMPBELLS RUN ROAD, SUITE 200, PITTSBURGH, PA 15205 (SCHEDULE 13G/A, 2025-11-24).
Source of funds (Item 3)
The information set forth in Items 2, 5 and 6 hereof is hereby incorporated by reference into this Item 3. The Reporting Person is not acquiring any Shares that trigger the filing of this Schedule 13D. With the exception of 100 Shares already owned by the Reporting Person prior to November 3, 2025 (which were acquired by the Reporting Person using working capital for an aggregate purchase price of ZAR 4,036, equivalent to approximately USD 227), all of the Shares were acquired by and/or behalf of, the Reporting Person's Clients prior to the Investment Management Agreement becoming effective.Aktiv Investment Management (Pty) Ltd, SCHEDULE 13D, 2025-11-10
Purpose of Transaction (Item 4)
Aktiv Investment Management (Pty) Ltd
The Reporting Person holds the Shares for investment purposesItem 4 of the SCHEDULE 13D filed 2025-11-10
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-11-10 | Aktiv Investment Management (Pty) Ltd | 15.7% | SCHEDULE 13D |
| 2025-11-24 | Peresec Prime Brokers (Pty) Ltd | SCHEDULE 13G/A |
Questions about who owns Montauk Renewables, Inc.
Who owns Montauk Renewables, Inc.?
On this page, one holder's latest ownership filing reports 5% or more of Montauk Renewables, Inc.: Aktiv Investment Management (Pty) Ltd (15.7%, Schedule 13D, filed 2025-11-10).
When did Aktiv Investment Management (Pty) Ltd buy into Montauk Renewables, Inc.?
The filings give report dates, not purchase dates. The earliest filing from Aktiv Investment Management (Pty) Ltd on this page is the Schedule 13D, filed 2025-11-10, reporting 15.7%.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 2 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.