As of November 6, 2026, 4 holders' latest Schedule 13D or 13G filings report owning 5% or more of Methanex Corporation. The largest reported stake is M&G Investment Management Limited's, at 15.3%. 11 filings are on record since July 2, 2025 (Schedule 13D/A, September 14, 2026).
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Key facts
- · Reporting person: Key Group Long Term Investments LP · Sole voting: 0 · Shared voting: 6,435,000 · Sole dispositive: 0 · Shared dispositive: 6,435,000 · SCHEDULE 13G/A, 2026-09-17
- · Holder: Key Group Long Term Investments LP · Percent: 6.9% · SCHEDULE 13G/A
- · Reporting person: M&G Investment Management Limited · Sole voting: 11,673,889 · Shared voting: 0 · Sole dispositive: 11,834,166 · Shared dispositive: 0 · SCHEDULE 13D/A, 2026-09-14
- · Holder: Key Group Long Term Investments LP · Percent: 12.8% · SCHEDULE 13G/A
- · Reporting person: Boston Partners · Sole voting: 4,049,706 · Shared voting: 0 · Sole dispositive: 4,110,146 · Shared dispositive: 0 · SCHEDULE 13G, 2026-08-04
Methanex Corporation has 11 Schedule 13D or 13G filings on record since 2025-07-02. 4 holders' latest filing reports 5% or more of common shares. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| M&G Investment Management Limited | 15.3% | 11,834,166 | SCHEDULE 13D/A, 2026-09-14 | 2026-09-10 |
| Key Group Long Term Investments LP | 8.3% | 6,435,000 | SCHEDULE 13G/A, 2026-09-17 | 2026-06-30 |
| Wellington Management Group LLP | 5.8% | 4,503,858 | SCHEDULE 13G, 2026-05-15 | 2026-03-31 |
| Boston Partners | 5.31% | 4,110,146 | SCHEDULE 13G, 2026-08-04 | 2026-06-30 |
| Oci N.V. | 3.4% | 2,612,962 | SCHEDULE 13G/A, 2026-04-15 | 2026-04-14 |
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Keep reading
More on Methanex Corporation and the records around it.
Methanex Corporation elsewhere on the record
Companies that share a holder
- M&G Investment Management Limited also filed stake reports on 1 other company: Freightos Limited (Aug 2026)
- Key Group Long Term Investments LP also filed stake reports on 4 other companies: Chord Energy Corp (Aug 2026), Peabody Energy Corporation (Aug 2026), Skeena Resources Ltd (Apr 2026)
- Boston Partners also filed stake reports on 28 other companies: CROSS COUNTRY HEALTHCARE INC (Nov 2026), DoubleDown Interactive Co., Ltd. (Nov 2026), Holley Inc. (Aug 2026)
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| M&G Investment Management Limited | 11,673,889 | 0 | 11,834,166 | 0 | SCHEDULE 13D/A, 2026-09-14 |
| Key Group Long Term Investments LP | 0 | 6,435,000 | 0 | 6,435,000 | SCHEDULE 13G/A, 2026-09-17 |
| Sunil Jagwani | 0 | 6,435,000 | 0 | 6,435,000 | SCHEDULE 13G/A, 2026-09-17 |
| Boston Partners | 4,049,706 | 0 | 4,110,146 | 0 | SCHEDULE 13G, 2026-08-04 |
The latest filing identifies Methanex Corporation by CUSIP 59151K108 and gives its principal executive office as 1800 WATERFRONT CENTER, 200 BURRARD STREET, VANCOUVER BC CANADA (SCHEDULE 13G/A, 2026-09-17).
Source of funds (Item 3)
The funds for the purchase of the Common Stock came from the investment capital of MAGIM.M&G Investment Management Limited, SCHEDULE 13D/A, 2026-09-14
Purpose of Transaction (Item 4)
M&G Investment Management Limited
The Reporting Person acquired the Common Stock to which this Schedule 13D relates for investment purposes in the ordinary course of business. The Reporting Person acquired the Common Stock because they believed that the Common Stock reported herein, when purchased, were undervalued and represented an attractive investment opportunity. The Reporting Person and their representatives have, from time to time, engaged in, and expect to continue to engage in, discussions with members of management and the board of directors of the Issuer (the "Board"), other current or prospective shareholders, industry analysts, existing or potential strategic partners or competitors, investment and financing professionals, sources of credit and other third parties regarding a variety of matters relating to the Issuer, which may include, among other things, the Issuer's business, management, capital structure and allocation, environmental, social and governance matters, Board composition and strategic alternatives and direction, and may take other steps seeking to bring about changes to increase shareholder value as well as pursue other plans or proposals that relate to or could result in any of the matters set forth in clauses (a)-(j) of Item 4 of Schedule 13D. The Reporting Person intend to review their investment in the Issuer on a continuing basis. Depending on various factors, including, without limitation, the outcome of any discussions referenced above, the Issuer's financial position, …The first part of Item 4 of the SCHEDULE 13D/A filed 2026-09-14; the filing has the rest
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-07-02 | Oci N.V. | 12.9% | SCHEDULE 13G |
| 2025-08-12 | Wellington Management Group LLP | 0.3% | SCHEDULE 13G/A |
| 2025-09-24 | M&G Investment Management Limited | 16.49% | SCHEDULE 13D/A |
| 2026-04-15 | Oci N.V. | 3.4% | SCHEDULE 13G/A |
| 2026-04-17 | Key Group Long Term Investments LP | 11.4% | SCHEDULE 13G |
| 2026-05-15 | Wellington Management Group LLP | 5.8% | SCHEDULE 13G |
| 2026-08-04 | Boston Partners | 5.31% | SCHEDULE 13G |
| 2026-08-14 | Key Group Long Term Investments LP | 12.8% | SCHEDULE 13G/A |
| 2026-09-14 | M&G Investment Management Limited | 15.3% | SCHEDULE 13D/A |
| 2026-09-17 | Key Group Long Term Investments LP | 6.9% | SCHEDULE 13G/A |
| 2026-09-17 | Key Group Long Term Investments LP | 8.3% | SCHEDULE 13G/A |
Questions about who owns Methanex Corporation
Who owns Methanex Corporation?
On this page, 4 holders' latest ownership filings report 5% or more of Methanex Corporation: M&G Investment Management Limited (15.3%, Schedule 13D/A, filed 2026-09-14), Key Group Long Term Investments LP (8.3%, Schedule 13G/A, filed 2026-09-17), Wellington Management Group LLP (5.8%, Schedule 13G, filed 2026-05-15) and Boston Partners (5.31%, Schedule 13G, filed 2026-08-04).
Who are the largest shareholders of Methanex Corporation?
By the share each holder's latest filing reports, the largest holders of Methanex Corporation on this page are M&G Investment Management Limited (15.3%), Key Group Long Term Investments LP (8.3%) and Wellington Management Group LLP (5.8%).
When did M&G Investment Management Limited buy into Methanex Corporation?
The filings give report dates, not purchase dates. The earliest filing from M&G Investment Management Limited on this page is the Schedule 13D/A, filed 2025-09-24, reporting 16.49%; its latest, Schedule 13D/A filed 2026-09-14, reports 15.3%. That earliest filing is itself an amendment, which updates an earlier report.
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%); 11 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.