UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

________________________________

SCHEDULE 14A

________________________________

Proxy Statement Pursuant To Section 14(A) of

the Securities Exchange Act of 1934

Filed by the Registrant	☒
Filed by a Party other than the Registrant	☐

Check the appropriate box:

☐	Preliminary Proxy Statement
☐	Confidential, For Use of the Commission Only (as permitted by Rule 14a-6(e)(2))
☐	Definitive Proxy Statement
☒	Definitive Additional Materials
☐	Soliciting Material Pursuant to Sec.240.14a-12

MOMENTUS INC.

(Name of Registrant As Specified In Its Charter)

___________________________________________________________

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

☒	No fee required
☐	Fee paid previously with preliminary materials.
☐	Fee computed on table in exhibit required by Item 25 (b) per Exchange Act Rules 14a-6 (i) (1) and 0-11

**** IMPORTANT REMINDER ****

Dear Momentus Inc. Stockholder:

By now, you should have received your proxy materials for the 2023 Annual Meeting of Stockholders of Momentus Inc., which is scheduled to be held virtually, via live webcast, at 9:00 a.m. Pacific Time on May 30, 2023.  You are receiving this reminder letter because your votes were not yet received at the time that this letter was mailed.  We ask that all stockholders vote their shares as soon as possible.  If you have already voted, we would like to thank you for your vote.

Your vote is extremely important.  PLEASE CAST YOUR VOTE TODAY.  The fastest and easiest way to vote is by telephone or over the Internet.  Instructions on how to vote your shares by telephone or over the Internet are enclosed with this reminder letter.

WE URGE YOU TO EXERCISE YOUR RIGHT TO VOTE TODAY.

Our Board recommends that you vote “FOR” ALL proposals.  Even if you plan on attending the virtual meeting, we urge you to vote your shares now, so they can be tabulated prior to the meeting.

* * * * PLEASE VOTE TODAY * * * *

If you have questions or need help voting your shares, please call our proxy solicitation firm, Morrow Sodali LLC, at 1-800-662-5200.

Thank you for your investment in Momentus Inc. and for taking the time to vote your shares.

Sincerely,

John Rood

Chief Executive Officer