TMC the metals Co Inc.
TMC- Exchange
- Nasdaq
- Industry
- Metal Mining
- SEC CIK
- 0001798562
In the last 90 days, TMC the metals Co Inc. insiders filed 1 open-market purchase and 0 sales; 212 institutions reported holding it in 13F filings for Q2 2026, worth $264.7M in total; no superinvestor holds it.
Holders of 5% or more of TMC
Holders whose latest Schedule 13D or 13G filing reports 5% or more of TMC the metals Co Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Allseas Group S.A. | 13D/A | 16.60%60.2M shares | – | May 27, 20251 filing | May 27, 2025 | SEC |
| Brumder William George | 13G/A | 7.60%31.5M shares | +2.40 ppfrom 5.20% | Sep 24, 20253 filings | Nov 28, 2025 | SEC |
| Korea Zinc Company, Ltd. | 13G | 7.20%26.5M shares | New | Jul 2, 20251 filing | Jul 2, 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
8 Schedule 13D and 13G filings on TMC the metals Co Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Nov 28, 20251:00 PM ET | Brumder William George | 13G/A | 7.60%31.5M shares | +2.40 ppfrom 5.20% | Nov 25, 2025 | SEC |
| Sep 25, 20254:24 PM ET | Brumder William George | 13G/A | 5.20%21.1M shares | −0.20 ppfrom 5.40% | Sep 16, 2025 | SEC |
| Sep 24, 20254:50 PM ET | Brumder William George | 13G | 5.40%22.0M shares | New | Sep 16, 2025 | SEC |
| Jul 2, 20254:13 PM ET | Korea Zinc Company, Ltd. | 13G | 7.20%26.5M shares | New | Jun 25, 2025 | SEC |
| Jun 23, 20254:25 PM ET | First Manhattan Coand 3 others | 13D/A | 4.90%17.6M shares | −1.60 ppfrom 6.50%Below 5% | Jun 18, 2025 | SEC |
| May 27, 20256:22 PM ET | Allseas Group S.A.and 4 others | 13D/A | 16.60%60.2M shares | – | May 22, 2025 | SEC |
| May 13, 20253:56 PM ET | First Manhattan Coand 3 others | 13D | 6.50%23.0M shares | −0.40 ppfrom 6.90% | May 12, 2025 | SEC |
| Feb 14, 20254:07 PM ET | First Manhattan Coand 2 others | 13G | 6.90%24.0M shares | New | Dec 31, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell TMC the metals Co Inc. shares.
No Form 144 notices for TMC the metals Co Inc. are on file.