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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 8-K

CURRENT REPORT
Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

October 9, 2025
Date of Report (date of earliest event reported)

Momentus Inc.
(Exact name of registrant as specified in its charter)

Delaware
001-39128
84-1905538
(State or other jurisdiction of incorporation or organization)
(Commission File Number)
(I.R.S. Employer Identification No.)

3901 N. First Street
San Jose, California
  
95134
(Address of Principal Executive Offices)
  
(Zip Code)

(650) 564-7820
Registrant's telephone number, including area code

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to section 12(g) of the Act:

Title of each class
Trading Symbol(s)
Name of each exchange on which registered
Class A common stock
MNTS
The Nasdaq Stock Market LLC
Warrants
MNTSW
The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 8.01.
Other Information.

On October 9, 2025, Momentus Inc. (the “Company”) issued the attached press releases announcing that (i) the Company was awarded a $5.1 million contract on September 26, 2025 by NASA’s Flight Opportunities program to support the Commercial Orbital System for Microgravity In-Space Crystallization demonstration (the “COSMIC press release”) and (ii) the Company was awarded a $2.5 million contract on September 29, 2025 by NASA’s Armstrong Flight Research Center to conduct a demonstration on-orbit of a new thruster called the Rotating Detonation Rocket Engine (the “RDRE press release”). The COSMIC press release and the RDRE press release are filed as Exhibits 99.1 and 99.2, respectively, to this Current Report on Form 8-K and are incorporated by reference herein.

Item 9.01.
Financial Statements and Exhibits.

(d) Exhibits

Exhibit Number
Exhibit Description
Press Release, dated October 9, 2025, issued by Momentus Inc.
Press Release, dated October 9, 2025, issued by Momentus Inc.
104
Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

   
By:
  
/s/ Lon Ensler
  
   
Name:
  
 Lon Ensler
Dated:
October 9, 2025
Title:
  
 Chief Financial Officer