Company: TMCWW
Filing Date: 2025-05-21
Form Type: DEFA14A
Source: 0001104659-25-051682
Chunk: 3

Company: TMC the metals Co Inc.
Filing Date: 2025-05-21
Form: DEFA14A
Chunk 3
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 under “Executive Officer and Director Compensation—Stock Compensation Plans and Awards—TMC
2021 Incentive Equity Plan—Shares Available for Issuance” in the Proxy Statement.

Additional Information

If you have already returned
your proxy card or provided voting instructions, you do not need to take any action unless you wish to change your vote. Proxies already
returned by shareholders (via Internet or mail) will remain valid and will be voted at the Annual Meeting unless revoked. None of the
actual agenda items presented in the Proxy Statement are affected by this Supplement, and shares represented by proxy cards returned before
the Annual Meeting will be voted with respect to all matters properly brought before the Annual Meeting as instructed on the form. Information
regarding how to vote your shares and revoke already submitted proxies is available in the Proxy Statement.

Except as described in this Supplement, the information disclosed in the Proxy Statement continues to apply. To the extent that information in this Supplement differs from information disclosed in the Proxy Statement, the information in this Supplement applies. The Proxy Statement, together with this Supplement, have been filed with the SEC and are also available at https://www.cstproxy.com/metals/2025.