TMC the metals Co Inc. (TMC)

Data as of Oct 9, 2026, from SEC Form 4 filings.

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Latest TMC insider trades

Allseas Group S.A. - 10% Owner
Open-market purchase7,305,567 sh
Jul 1, 2026
Brendan May - Director
Open-market sale$133K
Jun 2, 2026

About TMC the metals Co Inc. (TMC)

TMC the metals Co Inc. is an SEC registrant, filing under CIK 0001798562, classified as metal mining. It is grouped with Materials companies on this site.

Sector: Materials

SEC filings for TMC on EDGAR

TMC Form 4 activity by transaction type, last 90 days

Form 4 transaction type	Transactions	Shares	Total value
Grant or award	3	176,100

Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.

TMC insider transactions (Form 4)

110

28 Form 4 filings on record, the earliest from Nov 21, 2024, newest first.

Date	Insider	Transaction	Security	Shares	Price	Value
Sep 25, 2026	Liam M. Mallon - Director	Grant or award	Common Shares	25,445^{footnote F1}	$0.00	-
Sep 28, 2026	Liam M. Mallon - Director	Grant or award	Common Shares	77,720^{footnote F2}	$0.00	-
Footnote F1 (shares): Pursuant to the Issuer's Nonemployee Director Compensation Policy, the Reporting Person was granted restricted stock units ("RSUs") under the Issuer's 2021 Incentive Equity Plan (the "Plan"), which will vest, subject to continued service through each vesting date, over a… Full note on SEC EDGAR Footnote F2 (shares): The Reporting Person was granted RSUs under the Plan, which will vest, subject to continued service through each vesting date, over a three-year period as follows: 1/3 on the first anniversary of September 28, 2026 (the "Special Grant Date"), 1/3 on the second anniversary of the… Full note on SEC EDGAR
Sep 11, 2026	Andrew Hall - Director	Grant or award	Common Shares	72,935^{footnote F1}	$0.00	-
Footnote F1 (shares): The Reporting Person was granted restricted stock units ("RSUs") under the Issuer's 2021 Equity Incentive Plan. Each RSU represents the right to receive one common share. Subject to the Reporting Person's continued service, the RSUs vest on the third anniversary of the grant… Full note on SEC EDGAR
Jul 1, 2026	Allseas Group S.A. - 10% Owner	Open-market purchase	Common Shares	7,305,567	-^{footnote F2}	-
Footnote F2 (price): On July 1, 2026, Allseas acquired 7,305,567 common shares, pursuant to a Contract for Development Work and Commercial Production, by and between a wholly owned subsidiary of Allseas and TMC, dated May 11, 2026 and effective as of March 30, 2026, under which TMC is required to… Full note on SEC EDGAR
May 29, 2026	Christian Madsbjerg - Director	Grant or award	Common Shares	19,075^{footnote F1}	$0.00	-
May 29, 2026	Christian Madsbjerg - Director	Grant or award	Common Shares	16,528^{footnote F2}	$0.00	-
Footnote F1 (shares): In lieu of cash compensation under the Issuer's Nonemployee Director Compensation Policy ("Director Compensation Policy"), the Reporting Person was granted restricted stock units ("RSUs") under the Issuer's 2021 Equity Incentive Plan ("Equity Incentive Plan"). Each RSU… Full note on SEC EDGAR Footnote F2 (shares): Pursuant to the Director Compensation Policy, the Reporting Person was granted RSUs under the Equity Incentive Plan. Each RSU represents the right to receive one common share upon vesting. The RSUs vest on the date of the Issuer's 2027 annual meeting of shareholders, subject to… Full note on SEC EDGAR
May 29, 2026	Brendan May - Director	Grant or award	Common Shares	16,528^{footnote F1}	$0.00	-
Jun 2, 2026	Brendan May - Director	Open-market sale	Common Shares	20,768^{footnote F2}	$6.42^{footnote F3}	$133K
Footnote F1 (shares): Pursuant to the Issuer's Nonemployee Director Compensation Policy, the Reporting Person was granted restricted stock units ("RSUs") under the Issuer's 2021 Equity Incentive Plan. Each RSU represents the right to receive one common share upon vesting. The RSUs vest on the date of… Full note on SEC EDGAR Footnote F2 (shares): The sales reported were effected to cover tax withholding obligations in connection with the vesting of restricted stock units that were issued to the Reporting Person on May 29, 2026 pursuant to an automatic "sell to cover" transaction and does not represent a discretionary… Full note on SEC EDGAR Footnote F3 (price): The price reflects the average selling price of the common shares sold. These common shares were sold in multiple transactions at prices ranging from $6.40 to $6.46 per common share. The Reporting Person undertakes to provide, upon request by the SEC staff, the Issuer or a… Full note on SEC EDGAR
May 29, 2026	Sheila Khama - Director	Grant or award	Common Shares	17,316^{footnote F1}	$0.00	-
May 29, 2026	Sheila Khama - Director	Grant or award	Common Shares	16,528^{footnote F2}	$0.00	-
Footnote F1 (shares): In lieu of cash compensation under the Issuer's Nonemployee Director Compensation Policy ("Director Compensation Policy"), the Reporting Person was granted restricted stock units ("RSUs") under the Issuer's 2021 Equity Incentive Plan ("Equity Incentive Plan"). Each RSU… Full note on SEC EDGAR Footnote F2 (shares): Pursuant to the Director Compensation Policy, the Reporting Person was granted RSUs under the Equity Incentive Plan. Each RSU represents the right to receive one common share upon vesting. The RSUs vest on the date of the Issuer's 2027 annual meeting of shareholders, subject to… Full note on SEC EDGAR
May 29, 2026	Andrei Karkar - Director	Grant or award	Common Shares	17,857^{footnote F1}	$0.00	-
May 29, 2026	Andrei Karkar - Director	Grant or award	Common Shares	16,528^{footnote F2}	$0.00	-
Footnote F1 (shares): In lieu of cash compensation under the Issuer's Nonemployee Director Compensation Policy ("Director Compensation Policy"), the Reporting Person was granted restricted stock units ("RSUs") under the Issuer's 2021 Equity Incentive Plan ("Equity Incentive Plan"). Each RSU… Full note on SEC EDGAR Footnote F2 (shares): Pursuant to the Director Compensation Policy, the Reporting Person was granted RSUs under the Equity Incentive Plan. Each RSU represents the right to receive one common share upon vesting. The RSUs vest on the date of the Issuer's 2027 annual meeting of shareholders, subject to… Full note on SEC EDGAR
May 29, 2026	Andrew Hall - Director	Grant or award	Common Shares	18,263^{footnote F1}	$0.00	-
May 29, 2026	Andrew Hall - Director	Grant or award	Common Shares	16,528^{footnote F2}	$0.00	-
Footnote F1 (shares): In lieu of cash compensation under the Issuer's Nonemployee Director Compensation Policy ("Director Compensation Policy"), the Reporting Person was granted restricted stock units ("RSUs") under the Issuer's 2021 Equity Incentive Plan ("Equity Incentive Plan"). Each RSU… Full note on SEC EDGAR Footnote F2 (shares): Pursuant to the Director Compensation Policy, the Reporting Person was granted RSUs under the Equity Incentive Plan. Each RSU represents the right to receive one common share upon vesting. The RSUs vest on the date of the Issuer's 2027 annual meeting of shareholders, subject to… Full note on SEC EDGAR
May 29, 2026	Andrew Carlyle Greig - Director	Grant or award	Common Shares	20,292^{footnote F1}	$0.00	-
May 29, 2026	Andrew Carlyle Greig - Director	Grant or award	Common Shares	16,528^{footnote F2}	$0.00	-
Footnote F1 (shares): In lieu of cash compensation under the Issuer's Nonemployee Director Compensation Policy ("Director Compensation Policy"), the Reporting Person was granted restricted stock units ("RSUs") under the Issuer's 2021 Equity Incentive Plan ("Equity Incentive Plan"). Each RSU… Full note on SEC EDGAR Footnote F2 (shares): Pursuant to the Director Compensation Policy, the Reporting Person was granted RSUs under the Equity Incentive Plan. Each RSU represents the right to receive one common share upon vesting. The RSUs vest on the date of the Issuer's 2027 annual meeting of shareholders, subject to… Full note on SEC EDGAR
Apr 13, 2026	Craig Shesky - Officer	Grant or award	Common Shares	453,515^{footnote F1}	$0.00	-
Footnote F1 (shares): Consists of RSUs. Each RSU represents the right to receive one Share upon vesting. The RSUs were granted on April 13, 2026 as part of the Issuer's long-term incentive plan and vest, subject to continued service through the respective vesting date, over a three year period as… Full note on SEC EDGAR
Apr 13, 2026	Erika Ilves - Officer	Grant or award	Common Shares	453,515^{footnote F1}	$0.00	-
Footnote F1 (shares): Consists of RSUs. Each RSU represents the right to receive one Share upon vesting. The RSUs were granted on April 13, 2026 as part of the Issuer's long-term incentive plan and vest, subject to continued service through the respective vesting date, over a three year period as… Full note on SEC EDGAR
Apr 13, 2026	Gerard Barron - Officer	Grant or award	Common Shares	816,327^{footnote F1}	$0.00	-
Footnote F1 (shares): Consists of RSUs. Each RSU represents the right to receive one Share upon vesting. The RSUs were granted on April 13, 2026 as part of the Issuer's long-term incentive plan and vest, subject to continued service through the respective vesting date, over a three year period as… Full note on SEC EDGAR
Mar 24, 2026	Craig Shesky - Officer	Open-market sale	Common Shares	51,941	$4.74^{footnote F2}	$246K
Mar 25, 2026	Craig Shesky - Officer	Open-market sale	Common Shares	78,186	$4.58^{footnote F3}	$358K
Mar 26, 2026	Craig Shesky - Officer	Open-market sale	Common Shares	215,492	$4.53^{footnote F4}	$977K
Footnote F2 (price): The price reflects the average selling price of the common shares sold. These common shares were sold in multiple transactions at prices ranging from $4.67 to $4.88 per common share. The Reporting Person undertakes to provide, upon request by the SEC staff, the Issuer or a… Full note on SEC EDGAR Footnote F3 (price): The price reflects the average selling price of the common shares sold. These common shares were sold in multiple transactions at prices ranging from $4.47 to $4.85 per common share. The Reporting Person undertakes to provide, upon request by the SEC staff, the Issuer or a… Full note on SEC EDGAR Footnote F4 (price): The price reflects the average selling price of the common shares sold. These common shares were sold in multiple transactions at prices ranging from $4.40 to $4.61 per common share. The Reporting Person undertakes to provide, upon request by the SEC staff, the Issuer or a… Full note on SEC EDGAR
Mar 20, 2026	Craig Shesky - Officer	Option exercise	Common Shares	187,662^{footnote F1}	$0.00	-
Mar 20, 2026	Craig Shesky - Officer	Option exercise	Common Shares	166,502^{footnote F2}	$0.00	-
Mar 20, 2026	Craig Shesky - Officer	Option exercise	Common Shares	208,375^{footnote F3}	$0.00	-
Mar 20, 2026	Craig Shesky - Officer	Option exercise	Restricted Stock Units	187,662	$0.00	-
Mar 20, 2026	Craig Shesky - Officer	Option exercise	Restricted Stock Units	166,502	$0.00	-
Mar 20, 2026	Craig Shesky - Officer	Option exercise	Restricted Stock Units	208,375	$0.00	-
Footnote F1 (shares): Consists of restricted stock units ("RSUs") that converted to common shares on a one-to-one basis. The RSUs were granted on March 20, 2023 and 1/3 vested on March 20, 2024, 1/3 vested on March 20, 2025 and 1/3 vested on March 20, 2026. Footnote F2 (shares): Consists of RSUs that converted to common shares on a one-to-one basis. The RSUs were granted on March 20, 2024 and 1/3 vested on March 20, 2025 and 1/3 vested on March 20, 2026. The remaining RSUs will vest, subject to continued service through the vesting date, 1/3 of the… Full note on SEC EDGAR Footnote F3 (shares): Consists of RSUs that converted to common shares on a one-to-one basis. The RSUs were granted on March 20, 2025 and 1/3 vested on March 20, 2026. The remaining RSUs will vest as follows, subject to continued service through each vesting date: 1/3 of the total award on March 20… Full note on SEC EDGAR
Feb 10, 2026	Craig Shesky - Officer	Option exercise	Common Shares	63,204	$0.65	$41K
Feb 10, 2026	Craig Shesky - Officer	Option exercise	Stock Option (right to buy)	63,204	-^{footnote F4}	-
Feb 10, 2026	Craig Shesky - Officer	Option exercise	Class A Special Shares	1,379	-^{footnote F5}	-
Feb 10, 2026	Craig Shesky - Officer	Option exercise	Class B Special Shares	2,758	-^{footnote F5}	-
Feb 10, 2026	Craig Shesky - Officer	Option exercise	Class C Special Shares	2,758	-^{footnote F5}	-
Feb 10, 2026	Craig Shesky - Officer	Option exercise	Class D Special Shares	5,516	-^{footnote F5}	-
Feb 10, 2026	Craig Shesky - Officer	Option exercise	Class E Special Shares	5,516	-^{footnote F5}	-
Feb 10, 2026	Craig Shesky - Officer	Option exercise	Class F Special Shares	5,516	-^{footnote F5}	-
Feb 10, 2026	Craig Shesky - Officer	Option exercise	Class G Special Shares	6,895	-^{footnote F5}	-
Feb 10, 2026	Craig Shesky - Officer	Option exercise	Class H Special Shares	6,895	-^{footnote F5}	-
Footnote F4 (price): Received by the Reporting Person as described in the Form 4 submitted by the Reporting Person on September 13, 2021. Footnote F5 (price): Each of the Special Shares automatically convert into common shares on a one for one basis, if on any twenty trading days within any thirty trading day period, the common shares trade for a price that is greater than or equal to the price threshold for such class of Special… Full note on SEC EDGAR
Feb 6, 2026	Andrei Karkar - Director	Option exercise	Common Shares	31,602	$0.65	$21K
Feb 6, 2026	Andrei Karkar - Director	Option exercise	Stock Option (right to buy)	31,602	-^{footnote F5}	-
Feb 6, 2026	Andrei Karkar - Director	Option exercise	Class A Special Shares	689	-^{footnote F6}	-
Feb 6, 2026	Andrei Karkar - Director	Option exercise	Class B Special Shares	1,379	-^{footnote F6}	-
Feb 6, 2026	Andrei Karkar - Director	Option exercise	Class C Special Shares	1,379	-^{footnote F6}	-
Feb 6, 2026	Andrei Karkar - Director	Option exercise	Class D Special Shares	2,758	-^{footnote F6}	-
Feb 6, 2026	Andrei Karkar - Director	Option exercise	Class E Special Shares	2,758	-^{footnote F6}	-
Feb 6, 2026	Andrei Karkar - Director	Option exercise	Class F Special Shares	2,758	-^{footnote F6}	-
Feb 6, 2026	Andrei Karkar - Director	Option exercise	Class G Special Shares	3,447	-^{footnote F6}	-
Feb 6, 2026	Andrei Karkar - Director	Option exercise	Class H Special Shares	3,447	-^{footnote F6}	-
Footnote F5 (price): Received by the Reporting Person as described in the Form 4 submitted by the Reporting Person on September 13, 2021. Footnote F6 (price): Each of the Special Shares automatically convert into common shares on a one for one basis, if on any twenty trading days within any thirty trading day period, the common shares trade for a price that is greater than or equal to the price threshold for such class of Special… Full note on SEC EDGAR
Feb 6, 2026	Christian Madsbjerg - Director	Option exercise	Common Shares	11,578	$0.52	$6K
Feb 6, 2026	Christian Madsbjerg - Director	Option exercise	Common Shares	31,602	$0.65	$21K
Feb 6, 2026	Christian Madsbjerg - Director	Option exercise	Stock Option (right to buy)	11,578	-^{footnote F5}	-
Feb 6, 2026	Christian Madsbjerg - Director	Option exercise	Stock Option (right to buy)	31,602	-^{footnote F5}	-
Feb 6, 2026	Christian Madsbjerg - Director	Option exercise	Class A Special Shares	941	-^{footnote F8}	-
Feb 6, 2026	Christian Madsbjerg - Director	Option exercise	Class B Special Shares	1,884	-^{footnote F8}	-
Feb 6, 2026	Christian Madsbjerg - Director	Option exercise	Class C Special Shares	1,884	-^{footnote F8}	-
Feb 6, 2026	Christian Madsbjerg - Director	Option exercise	Class D Special Shares	3,768	-^{footnote F8}	-
Feb 6, 2026	Christian Madsbjerg - Director	Option exercise	Class E Special Shares	3,768	-^{footnote F8}	-
Feb 6, 2026	Christian Madsbjerg - Director	Option exercise	Class F Special Shares	3,768	-^{footnote F8}	-
Feb 6, 2026	Christian Madsbjerg - Director	Option exercise	Class G Special Shares	4,710	-^{footnote F8}	-
Feb 6, 2026	Christian Madsbjerg - Director	Option exercise	Class H Special Shares	4,710	-^{footnote F8}	-
Footnote F5 (price): Received by the Reporting Person as described in the Form 4 submitted by the Reporting Person on September 13, 2021. Footnote F8 (price): Each of the Special Shares automatically convert into common shares on a one for one basis, if on any twenty trading days within any thirty trading day period, the common shares trade for a price that is greater than or equal to the price threshold for such class of Special… Full note on SEC EDGAR
Feb 3, 2026	Andrei Karkar - Director	Option exercise	Common Shares	63,682	$0.52	$33K
Feb 3, 2026	Andrei Karkar - Director	Option exercise	Stock Option (right to buy)	63,682	-^{footnote F5}	-
Feb 3, 2026	Andrei Karkar - Director	Option exercise	Class A Special Shares	1,389	-^{footnote F6}	-
Feb 3, 2026	Andrei Karkar - Director	Option exercise	Class B Special Shares	2,778	-^{footnote F6}	-
Feb 3, 2026	Andrei Karkar - Director	Option exercise	Class E Special Shares	5,557	-^{footnote F6}	-
Feb 3, 2026	Andrei Karkar - Director	Option exercise	Class C Special Shares	2,778	-^{footnote F6}	-
Feb 3, 2026	Andrei Karkar - Director	Option exercise	Class D Special Shares	5,557	-^{footnote F6}	-
Feb 3, 2026	Andrei Karkar - Director	Option exercise	Class F Special Shares	5,557	-^{footnote F6}	-
Feb 3, 2026	Andrei Karkar - Director	Option exercise	Class G Special Shares	6,947	-^{footnote F6}	-
Feb 3, 2026	Andrei Karkar - Director	Option exercise	Class H Special Shares	6,947	-^{footnote F6}	-
Footnote F5 (price): Received by the Reporting Person as described in the Form 4 submitted by the Reporting Person on September 13, 2021. Footnote F6 (price): Each of the Class A Special Shares, the Class B Special Shares, the Class C Special Shares, the Class D Special Shares, the Class E Special Shares, the Class F Special Shares, the Class G Special Shares and the Class H Special Shares (collectively, the "Special Shares")… Full note on SEC EDGAR
Nov 28, 2025	Anthony O'Sullivan - Officer	Open-market sale	Common Shares	50,000	$6.51	$326K
Dec 2, 2025	Anthony O'Sullivan - Officer	Open-market sale	Common Shares	50,000	$6.77	$339K
Sep 23, 2025	Anthony O'Sullivan - Officer	Grant or award	Common Shares	1,000,000	$0.00	-
Sep 23, 2025	Craig Shesky - Officer	Grant or award	Restricted Stock Units	2,000,000	$0.00	-
Sep 22, 2025	Erika Ilves - Officer	Open-market sale	Common Shares	1,591,485	$5.77	$9.18M
Sep 23, 2025	Erika Ilves - Officer	Grant or award	Common Shares	2,000,000	$0.00	-
Sep 24, 2025	Erika Ilves - Officer	Option exercise	Common Shares	1,099,968	$0.65	$715K
Sep 24, 2025	Erika Ilves - Officer	Option exercise	Common Shares	262,109	$0.65	$170K
Sep 24, 2025	Erika Ilves - Officer	Option exercise	Common Shares	252,815	$0.65	$164K
Sep 24, 2025	Erika Ilves - Officer	Option exercise	Stock Option (right to buy)	1,099,968	-	-
Sep 24, 2025	Erika Ilves - Officer	Option exercise	Stock Option (right to buy)	262,109	-	-
Sep 24, 2025	Erika Ilves - Officer	Option exercise	Stock Option (right to buy)	252,815	-	-
Sep 24, 2025	Erika Ilves - Officer	Option exercise	Class A Special Shares	35,233	-	-
Sep 24, 2025	Erika Ilves - Officer	Option exercise	Class B Special Shares	70,468	-	-
Sep 24, 2025	Erika Ilves - Officer	Option exercise	Class C Special Shares	70,468	-	-
Sep 24, 2025	Erika Ilves - Officer	Option exercise	Class D Special Shares	140,937	-	-
Sep 24, 2025	Erika Ilves - Officer	Option exercise	Class E Special Shares	140,937	-	-
Sep 24, 2025	Erika Ilves - Officer	Option exercise	Class F Special Shares	140,937	-	-
Sep 24, 2025	Erika Ilves - Officer	Option exercise	Class G Special Shares	176,172	-	-
Sep 24, 2025	Erika Ilves - Officer	Option exercise	Class H Special Shares	176,172	-	-
Sep 2, 2025	Michael Bernard Hess - Director	Grant or award	Common Shares	237,530	$0.00	-
Sep 2, 2025	Michael Bernard Hess - Director	Grant or award	Common Shares	7,500,000	$0.00	-
Sep 2, 2025	Alex Spiro - Director	Grant or award	Common Shares	1,750,000	$0.00	-
Aug 26, 2025	Anthony O'Sullivan - Officer	Option exercise	Common Shares	250,000	$0.65	$163K
Aug 26, 2025	Anthony O'Sullivan - Officer	Open-market sale	Common Shares	250,000	$5.25	$1.31M
May 27, 2025	Anthony O'Sullivan - Officer	Open-market sale	Common Shares	100,000	$4.78	$478K
Jun 9, 2025	Anthony O'Sullivan - Officer	Open-market sale	Common Shares	50,000	$4.20	$210K
Jun 20, 2025	Anthony O'Sullivan - Officer	Open-market sale	Common Shares	185,110	$7.09	$1.31M
Aug 26, 2025	Anthony O'Sullivan - Officer	Option exercise	Stock Option (right to buy)	250,000	-	-
Aug 26, 2025	Anthony O'Sullivan - Officer	Option exercise	Class A Special Shares	5,454	-	-
Aug 26, 2025	Anthony O'Sullivan - Officer	Option exercise	Class B Special Shares	10,909	-	-
Aug 26, 2025	Anthony O'Sullivan - Officer	Option exercise	Class C Special Shares	10,909	-	-
Aug 26, 2025	Anthony O'Sullivan - Officer	Option exercise	Class D Special Shares	21,818	-	-
Aug 26, 2025	Anthony O'Sullivan - Officer	Option exercise	Class E Special Shares	21,818	-	-
Aug 26, 2025	Anthony O'Sullivan - Officer	Option exercise	Class F Special Shares	21,818	-	-
Aug 26, 2025	Anthony O'Sullivan - Officer	Option exercise	Class G Special Shares	27,272	-	-
Aug 26, 2025	Anthony O'Sullivan - Officer	Option exercise	Class H Special Shares	27,272	-	-
Dec 24, 2024	Brendan May - Director	Open-market purchase	Common Shares	25,000	$0.87	$22K
Nov 27, 2024	Craig Shesky - Officer	Open-market sale	Common Shares	47,523	$0.85	$40K
Nov 19, 2024	Andrew Hall - Director	Open-market sale	Common Shares	66,000	$0.93	$62K

Recent TMC Form 8-K filings

Read TMC company news

Sep 29, 2026Item 5.02, 7.01, 9.01

Read the filing on SEC EDGAR

Aug 19, 2026Item 7.01, 9.01

Read the filing on SEC EDGAR

Aug 17, 2026Item 7.01, 9.01

Read the filing on SEC EDGAR

Aug 13, 2026Item 2.02, 9.01

Recent TMC Form 144 notices of proposed sale

An insider files Form 144 before selling restricted or control stock. It announces a planned sale. If the sale goes ahead, it shows up later on a Form 4.

Filed	Filer	Relationship	Shares	Market value	Notice
Jun 2, 2026	-	-	-	-	View on EDGAR

TMC insider trading FAQ

What is the latest insider trade for TMC?

TMC the metals Co Inc. (TMC) had 2 insider filings in the last 90 days, with the most recent on 2026-10-09. The full record for TMC runs to 28 Form 4 filings, the earliest from 2024-11-21. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.

How many insiders are buying TMC stock?

No insider purchases of TMC were filed in the last 90 days. 2 purchases are on record for this company.

How many insiders are selling TMC stock?

No insider sales of TMC were filed in the last 90 days. 13 sales are on record for this company.

Where can I see TMC SEC filings (Form 4, 10-K, 10-Q, 8-K)?

This page collects TMC Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.

More Materials companies with insider activity

Recent insider filings

The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.

Oct 9, 2026 - Liam M. Mallon view on EDGAR
Sep 17, 2026 - Andrew Hall view on EDGAR
Jul 7, 2026 - Allseas Group S.A. view on EDGAR
Jun 2, 2026 - Christian Madsbjerg view on EDGAR
Jun 2, 2026 - Brendan May view on EDGAR
Jun 2, 2026 - Sheila Khama view on EDGAR
Jun 2, 2026 - Andrei Karkar view on EDGAR
Jun 2, 2026 - Andrew Hall view on EDGAR
Jun 2, 2026 - Andrew Carlyle Greig view on EDGAR

Related companies with recent insider activity

Learn more

What the Form 4 transaction codes mean: Grants, option exercises, gifts and tax withholding are not trades on the market. The codes say which is which.
Form 144 vs Form 4: A Form 144 announces a planned sale; the Form 4 reports it after it happens.
Insider activity in Materials: Where TMC's peers are being bought and sold.
Every recent Form 4: The market-wide feed, updated as filings arrive from SEC EDGAR.

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Form 4 transaction type

Transactions

Total value

Grant or award

176,100

Date

Insider

Transaction

Security

Price

Value

Sep 25, 2026

Liam M. Mallon - Director

Grant or award

Common Shares

25,445^{footnote F1}

$0.00

Sep 28, 2026

Liam M. Mallon - Director

Grant or award

Common Shares

77,720^{footnote F2}

$0.00

Footnote F1 (shares): Pursuant to the Issuer's Nonemployee Director Compensation Policy, the Reporting Person was granted restricted stock units ("RSUs") under the Issuer's 2021 Incentive Equity Plan (the "Plan"), which will vest, subject to continued service through each vesting date, over a… Full note on SEC EDGAR
Footnote F2 (shares): The Reporting Person was granted RSUs under the Plan, which will vest, subject to continued service through each vesting date, over a three-year period as follows: 1/3 on the first anniversary of September 28, 2026 (the "Special Grant Date"), 1/3 on the second anniversary of the… Full note on SEC EDGAR

Sep 11, 2026

Andrew Hall - Director

Grant or award

Common Shares

72,935^{footnote F1}

$0.00

Footnote F1 (shares): The Reporting Person was granted restricted stock units ("RSUs") under the Issuer's 2021 Equity Incentive Plan. Each RSU represents the right to receive one common share. Subject to the Reporting Person's continued service, the RSUs vest on the third anniversary of the grant… Full note on SEC EDGAR

Jul 1, 2026

Allseas Group S.A. - 10% Owner

Open-market purchase

Common Shares

7,305,567

-^{footnote F2}

Footnote F2 (price): On July 1, 2026, Allseas acquired 7,305,567 common shares, pursuant to a Contract for Development Work and Commercial Production, by and between a wholly owned subsidiary of Allseas and TMC, dated May 11, 2026 and effective as of March 30, 2026, under which TMC is required to… Full note on SEC EDGAR

May 29, 2026

Christian Madsbjerg - Director

Grant or award

Common Shares

19,075^{footnote F1}

$0.00

May 29, 2026

Christian Madsbjerg - Director

Grant or award

Common Shares

16,528^{footnote F2}

$0.00

Footnote F1 (shares): In lieu of cash compensation under the Issuer's Nonemployee Director Compensation Policy ("Director Compensation Policy"), the Reporting Person was granted restricted stock units ("RSUs") under the Issuer's 2021 Equity Incentive Plan ("Equity Incentive Plan"). Each RSU… Full note on SEC EDGAR
Footnote F2 (shares): Pursuant to the Director Compensation Policy, the Reporting Person was granted RSUs under the Equity Incentive Plan. Each RSU represents the right to receive one common share upon vesting. The RSUs vest on the date of the Issuer's 2027 annual meeting of shareholders, subject to… Full note on SEC EDGAR

May 29, 2026

Brendan May - Director

Grant or award

Common Shares

16,528^{footnote F1}

$0.00

Jun 2, 2026

Brendan May - Director

Open-market sale

Common Shares

20,768^{footnote F2}

$6.42^{footnote F3}

$133K

Footnote F1 (shares): Pursuant to the Issuer's Nonemployee Director Compensation Policy, the Reporting Person was granted restricted stock units ("RSUs") under the Issuer's 2021 Equity Incentive Plan. Each RSU represents the right to receive one common share upon vesting. The RSUs vest on the date of… Full note on SEC EDGAR
Footnote F2 (shares): The sales reported were effected to cover tax withholding obligations in connection with the vesting of restricted stock units that were issued to the Reporting Person on May 29, 2026 pursuant to an automatic "sell to cover" transaction and does not represent a discretionary… Full note on SEC EDGAR
Footnote F3 (price): The price reflects the average selling price of the common shares sold. These common shares were sold in multiple transactions at prices ranging from $6.40 to $6.46 per common share. The Reporting Person undertakes to provide, upon request by the SEC staff, the Issuer or a… Full note on SEC EDGAR

May 29, 2026

Sheila Khama - Director

Grant or award

Common Shares

17,316^{footnote F1}

$0.00

May 29, 2026

Sheila Khama - Director

Grant or award

Common Shares

16,528^{footnote F2}

$0.00

Footnote F1 (shares): In lieu of cash compensation under the Issuer's Nonemployee Director Compensation Policy ("Director Compensation Policy"), the Reporting Person was granted restricted stock units ("RSUs") under the Issuer's 2021 Equity Incentive Plan ("Equity Incentive Plan"). Each RSU… Full note on SEC EDGAR
Footnote F2 (shares): Pursuant to the Director Compensation Policy, the Reporting Person was granted RSUs under the Equity Incentive Plan. Each RSU represents the right to receive one common share upon vesting. The RSUs vest on the date of the Issuer's 2027 annual meeting of shareholders, subject to… Full note on SEC EDGAR

May 29, 2026

Andrei Karkar - Director

Grant or award

Common Shares

17,857^{footnote F1}

$0.00

May 29, 2026

Andrei Karkar - Director

Grant or award

Common Shares

16,528^{footnote F2}

$0.00

Footnote F1 (shares): In lieu of cash compensation under the Issuer's Nonemployee Director Compensation Policy ("Director Compensation Policy"), the Reporting Person was granted restricted stock units ("RSUs") under the Issuer's 2021 Equity Incentive Plan ("Equity Incentive Plan"). Each RSU… Full note on SEC EDGAR
Footnote F2 (shares): Pursuant to the Director Compensation Policy, the Reporting Person was granted RSUs under the Equity Incentive Plan. Each RSU represents the right to receive one common share upon vesting. The RSUs vest on the date of the Issuer's 2027 annual meeting of shareholders, subject to… Full note on SEC EDGAR

May 29, 2026

Andrew Hall - Director

Grant or award

Common Shares

18,263^{footnote F1}

$0.00

May 29, 2026

Andrew Hall - Director

Grant or award

Common Shares

16,528^{footnote F2}

$0.00

Footnote F1 (shares): In lieu of cash compensation under the Issuer's Nonemployee Director Compensation Policy ("Director Compensation Policy"), the Reporting Person was granted restricted stock units ("RSUs") under the Issuer's 2021 Equity Incentive Plan ("Equity Incentive Plan"). Each RSU… Full note on SEC EDGAR
Footnote F2 (shares): Pursuant to the Director Compensation Policy, the Reporting Person was granted RSUs under the Equity Incentive Plan. Each RSU represents the right to receive one common share upon vesting. The RSUs vest on the date of the Issuer's 2027 annual meeting of shareholders, subject to… Full note on SEC EDGAR

May 29, 2026

Andrew Carlyle Greig - Director

Grant or award

Common Shares

20,292^{footnote F1}

$0.00

May 29, 2026

Andrew Carlyle Greig - Director

Grant or award

Common Shares

16,528^{footnote F2}

$0.00

Footnote F1 (shares): In lieu of cash compensation under the Issuer's Nonemployee Director Compensation Policy ("Director Compensation Policy"), the Reporting Person was granted restricted stock units ("RSUs") under the Issuer's 2021 Equity Incentive Plan ("Equity Incentive Plan"). Each RSU… Full note on SEC EDGAR
Footnote F2 (shares): Pursuant to the Director Compensation Policy, the Reporting Person was granted RSUs under the Equity Incentive Plan. Each RSU represents the right to receive one common share upon vesting. The RSUs vest on the date of the Issuer's 2027 annual meeting of shareholders, subject to… Full note on SEC EDGAR

Apr 13, 2026

Craig Shesky - Officer

Grant or award

Common Shares

453,515^{footnote F1}

$0.00

Footnote F1 (shares): Consists of RSUs. Each RSU represents the right to receive one Share upon vesting. The RSUs were granted on April 13, 2026 as part of the Issuer's long-term incentive plan and vest, subject to continued service through the respective vesting date, over a three year period as… Full note on SEC EDGAR

Apr 13, 2026

Erika Ilves - Officer

Grant or award

Common Shares

453,515^{footnote F1}

$0.00

Footnote F1 (shares): Consists of RSUs. Each RSU represents the right to receive one Share upon vesting. The RSUs were granted on April 13, 2026 as part of the Issuer's long-term incentive plan and vest, subject to continued service through the respective vesting date, over a three year period as… Full note on SEC EDGAR

Apr 13, 2026

Gerard Barron - Officer

Grant or award

Common Shares

816,327^{footnote F1}

$0.00

Footnote F1 (shares): Consists of RSUs. Each RSU represents the right to receive one Share upon vesting. The RSUs were granted on April 13, 2026 as part of the Issuer's long-term incentive plan and vest, subject to continued service through the respective vesting date, over a three year period as… Full note on SEC EDGAR

Mar 24, 2026

Craig Shesky - Officer

Open-market sale

Common Shares

51,941

$4.74^{footnote F2}

$246K

Mar 25, 2026

Craig Shesky - Officer

Open-market sale

Common Shares

78,186

$4.58^{footnote F3}

$358K

Mar 26, 2026

Craig Shesky - Officer

Open-market sale

Common Shares

215,492

$4.53^{footnote F4}

$977K

Footnote F2 (price): The price reflects the average selling price of the common shares sold. These common shares were sold in multiple transactions at prices ranging from $4.67 to $4.88 per common share. The Reporting Person undertakes to provide, upon request by the SEC staff, the Issuer or a… Full note on SEC EDGAR
Footnote F3 (price): The price reflects the average selling price of the common shares sold. These common shares were sold in multiple transactions at prices ranging from $4.47 to $4.85 per common share. The Reporting Person undertakes to provide, upon request by the SEC staff, the Issuer or a… Full note on SEC EDGAR
Footnote F4 (price): The price reflects the average selling price of the common shares sold. These common shares were sold in multiple transactions at prices ranging from $4.40 to $4.61 per common share. The Reporting Person undertakes to provide, upon request by the SEC staff, the Issuer or a… Full note on SEC EDGAR

Mar 20, 2026

Craig Shesky - Officer

Option exercise

Common Shares

187,662^{footnote F1}

$0.00

Mar 20, 2026

Craig Shesky - Officer

Option exercise

Common Shares

166,502^{footnote F2}

$0.00

Mar 20, 2026

Craig Shesky - Officer

Option exercise

Common Shares

208,375^{footnote F3}

$0.00

Mar 20, 2026

Craig Shesky - Officer

Option exercise

Restricted Stock Units

187,662

$0.00

Mar 20, 2026

Craig Shesky - Officer

Option exercise

Restricted Stock Units

166,502

$0.00

Mar 20, 2026

Craig Shesky - Officer

Option exercise

Restricted Stock Units

208,375

$0.00

Footnote F1 (shares): Consists of restricted stock units ("RSUs") that converted to common shares on a one-to-one basis. The RSUs were granted on March 20, 2023 and 1/3 vested on March 20, 2024, 1/3 vested on March 20, 2025 and 1/3 vested on March 20, 2026.
Footnote F2 (shares): Consists of RSUs that converted to common shares on a one-to-one basis. The RSUs were granted on March 20, 2024 and 1/3 vested on March 20, 2025 and 1/3 vested on March 20, 2026. The remaining RSUs will vest, subject to continued service through the vesting date, 1/3 of the… Full note on SEC EDGAR
Footnote F3 (shares): Consists of RSUs that converted to common shares on a one-to-one basis. The RSUs were granted on March 20, 2025 and 1/3 vested on March 20, 2026. The remaining RSUs will vest as follows, subject to continued service through each vesting date: 1/3 of the total award on March 20… Full note on SEC EDGAR

Feb 10, 2026

Craig Shesky - Officer

Option exercise

Common Shares

63,204

$0.65

$41K

Feb 10, 2026

Craig Shesky - Officer

Option exercise

Stock Option (right to buy)

63,204

-^{footnote F4}

Feb 10, 2026

Craig Shesky - Officer

Option exercise

Class A Special Shares

1,379

-^{footnote F5}

Feb 10, 2026

Craig Shesky - Officer

Option exercise

Class B Special Shares

2,758

-^{footnote F5}

Feb 10, 2026

Craig Shesky - Officer

Option exercise

Class C Special Shares

2,758

-^{footnote F5}

Feb 10, 2026

Craig Shesky - Officer

Option exercise

Class D Special Shares

5,516

-^{footnote F5}

Feb 10, 2026

Craig Shesky - Officer

Option exercise

Class E Special Shares

5,516

-^{footnote F5}

Feb 10, 2026

Craig Shesky - Officer

Option exercise

Class F Special Shares

5,516

-^{footnote F5}

Feb 10, 2026

Craig Shesky - Officer

Option exercise

Class G Special Shares

6,895

-^{footnote F5}

Feb 10, 2026

Craig Shesky - Officer

Option exercise

Class H Special Shares

6,895

-^{footnote F5}

Footnote F4 (price): Received by the Reporting Person as described in the Form 4 submitted by the Reporting Person on September 13, 2021.
Footnote F5 (price): Each of the Special Shares automatically convert into common shares on a one for one basis, if on any twenty trading days within any thirty trading day period, the common shares trade for a price that is greater than or equal to the price threshold for such class of Special… Full note on SEC EDGAR

Feb 6, 2026

Andrei Karkar - Director

Option exercise

Common Shares

31,602

$0.65

$21K

Feb 6, 2026

Andrei Karkar - Director

Option exercise

Stock Option (right to buy)

31,602

-^{footnote F5}

Feb 6, 2026

Andrei Karkar - Director

Option exercise

Class A Special Shares

689

-^{footnote F6}

Feb 6, 2026

Andrei Karkar - Director

Option exercise

Class B Special Shares

1,379

-^{footnote F6}

Feb 6, 2026

Andrei Karkar - Director

Option exercise

Class C Special Shares

1,379

-^{footnote F6}

Feb 6, 2026

Andrei Karkar - Director

Option exercise

Class D Special Shares

2,758

-^{footnote F6}

Feb 6, 2026

Andrei Karkar - Director

Option exercise

Class E Special Shares

2,758

-^{footnote F6}

Feb 6, 2026

Andrei Karkar - Director

Option exercise

Class F Special Shares

2,758

-^{footnote F6}

Feb 6, 2026

Andrei Karkar - Director

Option exercise

Class G Special Shares

3,447

-^{footnote F6}

Feb 6, 2026

Andrei Karkar - Director

Option exercise

Class H Special Shares

3,447

-^{footnote F6}

Footnote F5 (price): Received by the Reporting Person as described in the Form 4 submitted by the Reporting Person on September 13, 2021.
Footnote F6 (price): Each of the Special Shares automatically convert into common shares on a one for one basis, if on any twenty trading days within any thirty trading day period, the common shares trade for a price that is greater than or equal to the price threshold for such class of Special… Full note on SEC EDGAR

Feb 6, 2026

Christian Madsbjerg - Director

Option exercise

Common Shares

11,578

$0.52

$6K

Feb 6, 2026

Christian Madsbjerg - Director

Option exercise

Common Shares

31,602

$0.65

$21K

Feb 6, 2026

Christian Madsbjerg - Director

Option exercise

Stock Option (right to buy)

11,578

-^{footnote F5}

Feb 6, 2026

Christian Madsbjerg - Director

Option exercise

Stock Option (right to buy)

31,602

-^{footnote F5}

Feb 6, 2026

Christian Madsbjerg - Director

Option exercise

Class A Special Shares

941

-^{footnote F8}

Feb 6, 2026

Christian Madsbjerg - Director

Option exercise

Class B Special Shares

1,884

-^{footnote F8}

Feb 6, 2026

Christian Madsbjerg - Director

Option exercise

Class C Special Shares

1,884

-^{footnote F8}

Feb 6, 2026

Christian Madsbjerg - Director

Option exercise

Class D Special Shares

3,768

-^{footnote F8}

Feb 6, 2026

Christian Madsbjerg - Director

Option exercise

Class E Special Shares

3,768

-^{footnote F8}

Feb 6, 2026

Christian Madsbjerg - Director

Option exercise

Class F Special Shares

3,768

-^{footnote F8}

Feb 6, 2026

Christian Madsbjerg - Director

Option exercise

Class G Special Shares

4,710

-^{footnote F8}

Feb 6, 2026

Christian Madsbjerg - Director

Option exercise

Class H Special Shares

4,710

-^{footnote F8}

Footnote F5 (price): Received by the Reporting Person as described in the Form 4 submitted by the Reporting Person on September 13, 2021.
Footnote F8 (price): Each of the Special Shares automatically convert into common shares on a one for one basis, if on any twenty trading days within any thirty trading day period, the common shares trade for a price that is greater than or equal to the price threshold for such class of Special… Full note on SEC EDGAR

Feb 3, 2026

Andrei Karkar - Director

Option exercise

Common Shares

63,682

$0.52

$33K

Feb 3, 2026

Andrei Karkar - Director

Option exercise

Stock Option (right to buy)

63,682

-^{footnote F5}

Feb 3, 2026

Andrei Karkar - Director

Option exercise

Class A Special Shares

1,389

-^{footnote F6}

Feb 3, 2026

Andrei Karkar - Director

Option exercise

Class B Special Shares

2,778

-^{footnote F6}

Feb 3, 2026

Andrei Karkar - Director

Option exercise

Class E Special Shares

5,557

-^{footnote F6}

Feb 3, 2026

Andrei Karkar - Director

Option exercise

Class C Special Shares

2,778

-^{footnote F6}

Feb 3, 2026

Andrei Karkar - Director

Option exercise

Class D Special Shares

5,557

-^{footnote F6}

Feb 3, 2026

Andrei Karkar - Director

Option exercise

Class F Special Shares

5,557

-^{footnote F6}

Feb 3, 2026

Andrei Karkar - Director

Option exercise

Class G Special Shares

6,947

-^{footnote F6}

Feb 3, 2026

Andrei Karkar - Director

Option exercise

Class H Special Shares

6,947

-^{footnote F6}

Footnote F5 (price): Received by the Reporting Person as described in the Form 4 submitted by the Reporting Person on September 13, 2021.
Footnote F6 (price): Each of the Class A Special Shares, the Class B Special Shares, the Class C Special Shares, the Class D Special Shares, the Class E Special Shares, the Class F Special Shares, the Class G Special Shares and the Class H Special Shares (collectively, the "Special Shares")… Full note on SEC EDGAR

Nov 28, 2025

Anthony O'Sullivan - Officer

Open-market sale

Common Shares

50,000

$6.51

$326K

Dec 2, 2025

Anthony O'Sullivan - Officer

Open-market sale

Common Shares

50,000

$6.77

$339K

Sep 23, 2025

Anthony O'Sullivan - Officer

Grant or award

Common Shares

1,000,000

$0.00

Sep 23, 2025

Craig Shesky - Officer

Grant or award

Restricted Stock Units

2,000,000

$0.00

Sep 22, 2025

Erika Ilves - Officer

Open-market sale

Common Shares

1,591,485

$5.77

$9.18M

Sep 23, 2025

Erika Ilves - Officer

Grant or award

Common Shares

2,000,000

$0.00

Sep 24, 2025

Erika Ilves - Officer

Option exercise

Common Shares

1,099,968

$0.65

$715K

Sep 24, 2025

Erika Ilves - Officer

Option exercise

Common Shares

262,109

$0.65

$170K

Sep 24, 2025

Erika Ilves - Officer

Option exercise

Common Shares

252,815

$0.65

$164K

Sep 24, 2025

Erika Ilves - Officer

Option exercise

Stock Option (right to buy)

1,099,968

Sep 24, 2025

Erika Ilves - Officer

Option exercise

Stock Option (right to buy)

262,109

Sep 24, 2025

Erika Ilves - Officer

Option exercise

Stock Option (right to buy)

252,815

Sep 24, 2025

Erika Ilves - Officer

Option exercise

Class A Special Shares

35,233

Sep 24, 2025

Erika Ilves - Officer

Option exercise

Class B Special Shares

70,468

Sep 24, 2025

Erika Ilves - Officer

Option exercise

Class C Special Shares

70,468

Sep 24, 2025

Erika Ilves - Officer

Option exercise

Class D Special Shares

140,937

Sep 24, 2025

Erika Ilves - Officer

Option exercise

Class E Special Shares

140,937

Sep 24, 2025

Erika Ilves - Officer

Option exercise

Class F Special Shares

140,937

Sep 24, 2025

Erika Ilves - Officer

Option exercise

Class G Special Shares

176,172

Sep 24, 2025

Erika Ilves - Officer

Option exercise

Class H Special Shares

176,172

Sep 2, 2025

Michael Bernard Hess - Director

Grant or award

Common Shares

237,530

$0.00

Sep 2, 2025

Michael Bernard Hess - Director

Grant or award

Common Shares

7,500,000

$0.00

Sep 2, 2025

Alex Spiro - Director

Grant or award

Common Shares

1,750,000

$0.00

Aug 26, 2025

Anthony O'Sullivan - Officer

Option exercise

Common Shares

250,000

$0.65

$163K

Aug 26, 2025

Anthony O'Sullivan - Officer

Open-market sale

Common Shares

250,000

$5.25

$1.31M

May 27, 2025

Anthony O'Sullivan - Officer

Open-market sale

Common Shares

100,000

$4.78

$478K

Jun 9, 2025

Anthony O'Sullivan - Officer

Open-market sale

Common Shares

50,000

$4.20

$210K

Jun 20, 2025

Anthony O'Sullivan - Officer

Open-market sale

Common Shares

185,110

$7.09

$1.31M

Aug 26, 2025

Anthony O'Sullivan - Officer

Option exercise

Stock Option (right to buy)

250,000

Aug 26, 2025

Anthony O'Sullivan - Officer

Option exercise

Class A Special Shares

5,454

Aug 26, 2025

Anthony O'Sullivan - Officer

Option exercise

Class B Special Shares

10,909

Aug 26, 2025

Anthony O'Sullivan - Officer

Option exercise

Class C Special Shares

10,909

Aug 26, 2025

Anthony O'Sullivan - Officer

Option exercise

Class D Special Shares

21,818

Aug 26, 2025

Anthony O'Sullivan - Officer

Option exercise

Class E Special Shares

21,818

Aug 26, 2025

Anthony O'Sullivan - Officer

Option exercise

Class F Special Shares

21,818

Aug 26, 2025

Anthony O'Sullivan - Officer

Option exercise

Class G Special Shares

27,272

Aug 26, 2025

Anthony O'Sullivan - Officer

Option exercise

Class H Special Shares

27,272

Dec 24, 2024

Brendan May - Director

Open-market purchase

Common Shares

25,000

$0.87

$22K

Nov 27, 2024

Craig Shesky - Officer

Open-market sale

Common Shares

47,523

$0.85

$40K

Nov 19, 2024

Andrew Hall - Director

Open-market sale

Common Shares

66,000

$0.93

$62K

Filed

Filer

Relationship

Market value

Notice

Jun 2, 2026

View on EDGAR