Comparable stake leader
Allseas Group S.A.
SEC ownership of TMC the metals Co Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001798562.
Disclosed value leader
Allseas Group S.A.
Comparable rows
5/50
Latest evidence
11 Sep 2026
- Public ticker
- TMC, TMCWW on Nasdaq
- Parsed ownership sources
-
13D/G, 3/4/5, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Allseas Group S.A.
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
5 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Allseas Group S.A.
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
11 Sep 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001798562
- Issuer location
- Vancouver, British Columbia, Canada
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of TMC the metals Co Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Allseas Group S.A.
Disclosed value leader
Allseas Group S.A.
Comparable rows
5/50
Latest evidence
11 Sep 2026
13D/G
3/4/5
13F
Lead comparable stake: 16%
45 rows are not safely comparable across share classes.
13D/G row: Allseas Group S.A.
Showing 1-8 of 50 holder rows.
Quick read
Allseas Group S.A. leads the comparable SEC ownership view at 16%.
5 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Allseas Group S.A.'s linked filing trail.
Comparable ownership
Top 5
Allseas Group S.A.
16%
Korea Zinc Company, Ltd.
7.2%
Gerard Barron
6.9%
FIRST MANHATTAN CO. LLC.
4.9%
William George Brumder II
3.4%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Allseas Group S.A. |
13D/G
3/4/5
Argentum Cedit Virtuti NV · 10%+ Owner
|
16%
Reported 13D/G
· 01 Jul 2026
|
$299,036,079
67,502,501 shares
|
+$32,363,662 | 01 Jul 2026 |
| Korea Zinc Company, Ltd. |
13D/G
|
7.2%
Reported 13D/G
· 25 Jun 2025
|
$127,159,474
26,491,557 shares
|
$0 | 25 Jun 2025 |
| Gerard Barron |
3/4/5
13D/G
Chairman & CEO, Director
|
6.9%
Reported 13D/G
· 09 Sep 2026
|
$195,222,088
41,803,445 shares
|
— | 13 Apr 2026 |
| FIRST MANHATTAN CO. LLC. |
13D/G
13F
Company
|
4.9%
Reported 13D/G
· 18 Jun 2025
|
$76,646,082
17,619,789 shares
|
-$23,364,985 | 18 Jun 2025 |
| William George Brumder II |
13D/G
Brumder William George
|
3.4%
Reported 13D/G
· 31 Mar 2026
|
$63,811,593
14,703,132 shares
|
-$73,082,163 | 31 Mar 2026 |
| Andrei Karkar |
3/4/5
Director, 10%+ Owner
|
—
mixed-class rows
|
$286,801,002
61,564,421 shares
mixed-class rows
|
— | 29 May 2026 |
| ERAS Capital LLC |
3/4/5
10%+ Owner
|
—
denominator unverified
|
$286,801,002
61,413,491 shares
|
— | 29 May 2026 |
| Allseas Investments S.A. |
3/4/5
10%+ Owner
|
—
denominator unverified
|
$276,516,914
62,419,168 shares
|
— | 01 Jul 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$2,378,501.
Buys
$0
Insiders: 0
Sells
$2,378,501
Insiders: 3
Net
-$2,378,501
Shares: -466,387
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 466,387
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 20,768 | $0 | $133,331 | -$133,331 |
| 6-9 | 0 | 345,619 | $0 | $1,581,170 | -$1,581,170 |
| 9-12 | 0 | 100,000 | $0 | $664,000 | -$664,000 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 31 reporting-owner rows connected to TMC the metals Co Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
31
Largest Forms 3/4/5 holder
Andrei Karkar
Net 12M change
-$2,378,501
Latest report
25 Sep 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Andrei Karkar | Director, 10%+ Owner | $286,801,002 | Mixed | 29 May 2026 | ||
| ERAS Capital LLC | 10%+ Owner | $286,801,002 | Mixed | 29 May 2026 | ||
| Allseas Investments S.A. | 10%+ Owner | $276,516,914 | Mixed | 01 Jul 2026 | ||
| Stichting Administratiekantoor Aequa Lance Foundation | 10%+ Owner | $276,516,914 | Mixed | 01 Jul 2026 | ||
| Argentum Cedit Virtuti NV | 10%+ Owner | $276,516,914 | Mixed | 01 Jul 2026 | ||
| Edward Heerema | 10%+ Owner | $276,516,914 | Mixed | 01 Jul 2026 | ||
| Allseas Group S.A. | 10%+ Owner | $276,516,914 | Mixed | 01 Jul 2026 | ||
| Gerard Barron | Chairman & CEO, Director | $195,222,088 | Mixed | 13 Apr 2026 | ||
| Michael Bernard Hess | Director | $60,225,494 | Mixed | 02 Sep 2025 | ||
| Erika Ilves | Chief Strategy Officer | $24,493,593 | Mixed | 13 Apr 2026 | ||
| Andrew Carlyle Greig | Director | $23,848,989 | Mixed | 29 May 2026 | ||
| Anthony O'Sullivan | Chief Development Officer | $13,713,765 | -$664,000 | -4.6% | Filing P/S | 08 Dec 2025 |
| Alex Spiro | Director | $9,520,000 | Mixed | 02 Sep 2025 | ||
| Scott Edward Leonard | Director | $9,214,304 | Mixed | 13 Sep 2021 | ||
| Sustainable Opportunities Holdings LLC | Former 10% holder | $9,203,220 | Mixed | 09 Sep 2021 | ||
| Scott Honour | Former Director | $9,203,220 | Mixed | 09 Sep 2021 | ||
| Craig Shesky | Chief Financial Officer | $8,776,592 | -$1,581,170 | -15% | Mixed | 13 Apr 2026 |
| Andrew Hall | Director | $2,068,778 | Mixed | 11 Sep 2026 | ||
| Christian Madsbjerg | Director | $1,916,582 | Mixed | 29 May 2026 | ||
| Sheila Khama | Director | $1,651,302 | Mixed | 29 May 2026 |
Recent insider transactions for TMC the metals Co Inc.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Liam M. Mallon | TMC | Common Shares | Award | 305.4% | 77,720 | 103,165 | 28 Sep 2026 | Direct | ||
| Liam M. Mallon | TMC | Common Shares | Award | 25,445 | 25,445 | 25 Sep 2026 | Direct | |||
| Andrew Hall | TMC | Common Shares | Award | 18.5% | 72,935 | 466,993 | 11 Sep 2026 | Direct | ||
| Allseas Group S.A. | TMC | Common Shares | Purchase | 13.3% | 7,305,567 | 62,419,168 | 01 Jul 2026 | Direct | ||
| Allseas Group S.A. | TMC | Common Shares | Purchase | 13.3% | 7,305,567 | 62,419,168 | 01 Jul 2026 | Direct | ||
| Allseas Group S.A. | TMC | Common Shares | Purchase | 13.3% | 7,305,567 | 62,419,168 | 01 Jul 2026 | Direct | ||
| Allseas Group S.A. | TMC | Common Shares | Purchase | 13.3% | 7,305,567 | 62,419,168 | 01 Jul 2026 | Direct | ||
| Allseas Group S.A. | TMC | Common Shares | Purchase | 13.3% | 7,305,567 | 62,419,168 | 01 Jul 2026 | Direct | ||
| Brendan May | TMC | Common Shares | Sale | -9.7% | $133,331 | $6.42 | -20,768 | 193,346 | 02 Jun 2026 | Direct |
| Christian Madsbjerg | TMC | Common Shares | Award | 9.5% | 35,603 | 410,403 | 29 May 2026 | Direct | ||
| Brendan May | TMC | Common Shares | Award | 8.36% | 16,528 | 214,114 | 29 May 2026 | Direct | ||
| Sheila Khama | TMC | Common Shares | Award | 10.6% | 33,844 | 353,598 | 29 May 2026 | Direct | ||
| Karkar Andrei | TMC | Common Shares | Award | 8.08% | 34,385 | 459,996 | 29 May 2026 | Direct | ||
| Andrei Karkar | TMC | Common Shares | Award | 8.08% | 34,385 | 459,996 | 29 May 2026 | Direct | ||
| Andrew Hall | TMC | Common Shares | Award | 9.68% | 34,791 | 394,058 | 29 May 2026 | Direct | ||
| Andrew Carlyle Greig | TMC | Common Shares | Award | 0.73% | 36,820 | 5,106,850 | 29 May 2026 | Direct | ||
| Craig Shesky | TMC | Common Shares | Award | 31.8% | 453,515 | 1,879,356 | 13 Apr 2026 | Direct | ||
| Erika Ilves | TMC | Common Shares | Award | 9.53% | 453,515 | 5,214,199 | 13 Apr 2026 | Direct | ||
| Gerard Barron | TMC | Common Shares | Award | 1.99% | 816,327 | 41,803,445 | 13 Apr 2026 | Direct | ||
| Craig Shesky | TMC | Common Shares | Sale | -13.1% | $976,825 | $4.53 | -215,492 | 1,425,841 | 26 Mar 2026 | Direct |
| Craig Shesky | TMC | Common Shares | Sale | -4.55% | $358,248 | $4.58 | -78,186 | 1,641,333 | 25 Mar 2026 | Direct |
| Craig Shesky | TMC | Common Shares | Sale | -2.93% | $246,096 | $4.74 | -51,941 | 1,719,519 | 24 Mar 2026 | Direct |
| Craig Shesky | TMC | Common Shares | Options Exercise | 46.5% | 562,539 | 1,771,460 | 20 Mar 2026 | Direct | ||
| Craig Shesky | TMC | Restricted Stock Units | Options Exercise | -100% | -562,539 | 0 | 20 Mar 2026 | Direct | ||
| Craig Shesky | TMC | Common Shares | Options Exercise | 5.52% | 63,204 | 1,208,921 | 10 Feb 2026 | Direct | ||
| Craig Shesky | TMC | Class H Special Shares | Options Exercise | 20.5% | 6,895 | 40,578 | 10 Feb 2026 | Direct | ||
| Craig Shesky | TMC | Class G Special Shares | Options Exercise | 20.5% | 6,895 | 40,578 | 10 Feb 2026 | Direct | ||
| Craig Shesky | TMC | Class F Special Shares | Options Exercise | 20.5% | 5,516 | 32,462 | 10 Feb 2026 | Direct | ||
| Craig Shesky | TMC | Class E Special Shares | Options Exercise | 20.5% | 5,516 | 32,462 | 10 Feb 2026 | Direct | ||
| Craig Shesky | TMC | Class D Special Shares | Options Exercise | 20.5% | 5,516 | 32,462 | 10 Feb 2026 | Direct | ||
| Craig Shesky | TMC | Class C Special Shares | Options Exercise | 20.5% | 2,758 | 16,231 | 10 Feb 2026 | Direct | ||
| Craig Shesky | TMC | Class B Special Shares | Options Exercise | 20.5% | 2,758 | 16,231 | 10 Feb 2026 | Direct | ||
| Craig Shesky | TMC | Class A Special Shares | Options Exercise | 20.5% | 1,379 | 8,116 | 10 Feb 2026 | Direct | ||
| Craig Shesky | TMC | Stock Option (right to buy) | Options Exercise | -25% | -63,204 | 189,610 | 10 Feb 2026 | Direct | ||
| Andrei Karkar | TMC | Common Shares | Options Exercise | 8.02% | 31,602 | 425,611 | 06 Feb 2026 | Direct | ||
| Andrei Karkar | TMC | Class H Special Shares | Options Exercise | 49.6% | 3,447 | 10,394 | 06 Feb 2026 | Direct | ||
| Andrei Karkar | TMC | Class G Special Shares | Options Exercise | 49.6% | 3,447 | 10,394 | 06 Feb 2026 | Direct | ||
| Andrei Karkar | TMC | Class F Special Shares | Options Exercise | 49.6% | 2,758 | 8,315 | 06 Feb 2026 | Direct | ||
| Andrei Karkar | TMC | Class E Special Shares | Options Exercise | 49.6% | 2,758 | 8,315 | 06 Feb 2026 | Direct | ||
| Andrei Karkar | TMC | Class D Special Shares | Options Exercise | 49.6% | 2,758 | 8,315 | 06 Feb 2026 | Direct | ||
| Andrei Karkar | TMC | Class C Special Shares | Options Exercise | 49.6% | 1,379 | 4,157 | 06 Feb 2026 | Direct | ||
| Andrei Karkar | TMC | Class B Special Shares | Options Exercise | 49.6% | 1,379 | 4,157 | 06 Feb 2026 | Direct | ||
| Andrei Karkar | TMC | Class A Special Shares | Options Exercise | 49.6% | 689 | 2,078 | 06 Feb 2026 | Direct | ||
| Andrei Karkar | TMC | Stock Option (right to buy) | Options Exercise | -25% | -31,602 | 94,805 | 06 Feb 2026 | Direct | ||
| Christian Madsbjerg | TMC | Common Shares | Options Exercise | 13% | 43,180 | 374,800 | 06 Feb 2026 | Direct | ||
| Christian Madsbjerg | TMC | Class H Special Shares | Options Exercise | 4,710 | 4,710 | 06 Feb 2026 | Direct | |||
| Christian Madsbjerg | TMC | Class G Special Shares | Options Exercise | 4,710 | 4,710 | 06 Feb 2026 | Direct | |||
| Christian Madsbjerg | TMC | Class F Special Shares | Options Exercise | 3,768 | 3,768 | 06 Feb 2026 | Direct | |||
| Christian Madsbjerg | TMC | Class E Special Shares | Options Exercise | 3,768 | 3,768 | 06 Feb 2026 | Direct | |||
| Christian Madsbjerg | TMC | Class D Special Shares | Options Exercise | 3,768 | 3,768 | 06 Feb 2026 | Direct |
* marks a reported price that did not pass the local price check.