As of November 9, 2026, 3 holders' latest Schedule 13D or 13G filings report owning 5% or more of TMC the metals Co Inc. The largest reported stake is Allseas Group S.A.'s, at 15.6%. 7 filings are on record since July 2, 2025 (Schedule 13D/A, July 7, 2026).
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Key facts
- · Reporting person: Gerard Barron · Sole voting: 30,809,638 · Shared voting: 0 · Sole dispositive: 30,809,638 · Shared dispositive: 0 · SCHEDULE 13D/A, 2026-09-11
- · Reporting person: Allseas Group S.A. · Sole voting: 0 · Shared voting: 66,502,501 · Sole dispositive: 0 · Shared dispositive: 66,502,501 · SCHEDULE 13D/A, 2026-07-07
- · Holder: Brumder William George · Percent: 3.4% · SCHEDULE 13G/A
- · Holder: Brumder William George · Percent: 7.6% · SCHEDULE 13G/A
- · Holder: Brumder William George · Percent: 5.2% · SCHEDULE 13G/A
TMC the metals Co Inc. has 7 Schedule 13D or 13G filings on record since 2025-07-02. 3 holders' latest filing reports 5% or more of common shares without par value. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Allseas Group S.A. | 15.6% | 66,502,501 | SCHEDULE 13D/A, 2026-07-07 | 2026-07-01 |
| Korea Zinc Company, Ltd. | 7.2% | 26,491,557 | SCHEDULE 13G, 2025-07-02 | 2025-06-25 |
| 6.9% | 30,809,638 | SCHEDULE 13D/A, 2026-09-11 | 2026-09-09 | |
| 3.4% | 14,703,132 | SCHEDULE 13G/A, 2026-05-01 | 2026-03-31 |
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More on TMC the metals Co Inc. and the records around it.
TMC the metals Co Inc. elsewhere on the record
- Leadership changes Sep 2026
- Who owns it
Companies that share a holder
- Brumder William George also filed stake reports on 5 other companies: GoPro, Inc. (Apr 2026), New Horizon Aircraft Ltd. (Apr 2026), ODYSSEY MARINE EXPLORATION INC (Apr 2026)
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Allseas Group S.A. | 0 | 66,502,501 | 0 | 66,502,501 | SCHEDULE 13D/A, 2026-07-07 |
| Allseas Investments S.A. | 0 | 66,502,501 | 0 | 66,502,501 | SCHEDULE 13D/A, 2026-07-07 |
| Argentum Cedit Virtuti NV | 0 | 67,502,501 | 0 | 67,502,501 | SCHEDULE 13D/A, 2026-07-07 |
| Stichting Administratiekantoor Aequa Lance Foundation | 0 | 67,502,501 | 0 | 67,502,501 | SCHEDULE 13D/A, 2026-07-07 |
| Edward Heerema | 0 | 67,502,501 | 0 | 67,502,501 | SCHEDULE 13D/A, 2026-07-07 |
| Gerard Barron | 30,809,638 | 0 | 30,809,638 | 0 | SCHEDULE 13D/A, 2026-09-11 |
The latest filing identifies TMC the metals Co Inc. by CUSIP 87261Y106 and gives its principal executive office as 1111 West Hastings Street, 15th Floor, Vancouver (SCHEDULE 13D/A, 2026-09-11).
Source of funds (Item 3)
Item 3 of the Schedule 13D is hereby supplemented by adding the following additional information: On July 1, 2026, AGSA acquired 7,305,567 TMC Common Shares, pursuant to the commercial arrangement under a Contract for Development Work and Commercial Production, dated May 11, 2026, and as effective from March 30, 2026 (the "Effective Date"), by and between a wholly owned subsidiary of AGSA and the Issuer, at a purchase price of $4.66 per common share.Allseas Group S.A., SCHEDULE 13D/A, 2026-07-07
Item 3 is hereby supplemented by adding the following at the end thereof: On November 22, 2024, the Reporting Person acquired 260,417 Common Shares upon the vesting and settlement of restricted stock units issued to the Reporting Person pursuant to the Issuer's incentive plans On March 20, 2025, the Reporting Person acquired an aggregate of 1,247,191 Common Shares upon the vesting and settlement of restricted stock units issued to the Reporting Person pursuant to the Issuer's incentive plans.Gerard Barron, SCHEDULE 13D/A, 2026-09-11
Purpose of Transaction (Item 4)
Gerard Barron
Item 4 is hereby supplemented by adding the following after the end of the second paragraph thereof: On November 22, 2024, the Reporting Person acquired 260,417 Common Shares upon the vesting and settlement of restricted stock units issued to the Reporting Person pursuant to the Issuer's incentive plans On March 20, 2025, the Reporting Person acquired an aggregate of 1,247,191 Common Shares upon the vesting and settlement of restricted stock units issued to the Reporting Person pursuant to the Issuer's incentive plans. On March 20, 2026, the Reporting Person acquired an aggregate of 1,438,075 Common Shares upon the vesting and settlement of restricted stock units issued to the Reporting Person pursuant to the Issuer's incentive plans. On October 28, 2025, the Reporting Person acquired 6,666,667 Common Shares upon the vesting and settlement of restricted stock units awarded to the Reporting Person in April 2024 upon the achievement of a $7.50 Common Share average closing price vesting threshold. On September 9, 2026, the warrants to purchase 89,394 Common Shares acquired by the Reporting Person on December 24, 2021 in privately negotiated purchases expired pursuant to their terms without the Reporting Person exercising these warrants.Item 4 of the SCHEDULE 13D/A filed 2026-09-11
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-07-02 | Korea Zinc Company, Ltd. | 7.2% | SCHEDULE 13G |
| 2025-09-24 | Brumder William George | 5.4% | SCHEDULE 13G |
| 2025-09-25 | Brumder William George | 5.2% | SCHEDULE 13G/A |
| 2025-11-28 | Brumder William George | 7.6% | SCHEDULE 13G/A |
| 2026-05-01 | Brumder William George | 3.4% | SCHEDULE 13G/A |
| 2026-07-07 | Allseas Group S.A. | 15.6% | SCHEDULE 13D/A |
| 2026-09-11 | Gerard Barron | 6.9% | SCHEDULE 13D/A |
Questions about who owns TMC the metals Co Inc.
Who owns TMC the metals Co Inc.?
On this page, 3 holders' latest ownership filings report 5% or more of TMC the metals Co Inc.: Allseas Group S.A. (15.6%, Schedule 13D/A, filed 2026-07-07), Korea Zinc Company, Ltd. (7.2%, Schedule 13G, filed 2025-07-02) and Gerard Barron (6.9%, Schedule 13D/A, filed 2026-09-11).
Who are the largest shareholders of TMC the metals Co Inc.?
By the share each holder's latest filing reports, the largest holders of TMC the metals Co Inc. on this page are Allseas Group S.A. (15.6%), Korea Zinc Company, Ltd. (7.2%) and Gerard Barron (6.9%).
When did Allseas Group S.A. buy into TMC the metals Co Inc.?
The filings give report dates, not purchase dates. The earliest filing from Allseas Group S.A. on this page is the Schedule 13D/A, filed 2026-07-07, reporting 15.6%. 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%); 7 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.
Also on the record for TMC the metals Co Inc.
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| September 29, 2026 | Leadership change: Liam Mallon appointed, Director, and 2 more | — | Leadership changes | Source |
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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.