MNTS Form 4: Lon Ensler Receives 95,000 RSUs; Late Filing Noted

Rhea-AI Filing Summary

Momentus Inc. (MNTS) reported that Lon Ensler, the company's Chief Financial Officer, was granted 95,000 Restricted Stock Units (RSUs) on 08/01/2025. Each RSU represents a contingent right to one share of Class A common stock and the award vests in four equal annual installments from the Vesting Commencement Date, subject to continued employment through each vesting date. The Form 4 was signed on 09/10/2025 and notes the transaction is being reported late due to an administrative error. The filing shows the 95,000 RSUs as a direct beneficial ownership and lists an exercise/issue price of $0.

Positive

• 95,000 RSU grant aligns CFO compensation with shareholder value through multi-year vesting
• Direct beneficial ownership of the awards is clearly disclosed

Negative

• Late reporting of the Form 4 due to an administrative error, indicating a disclosure control lapse
• No Vesting Commencement Date specified in the filing text (only referenced), limiting clarity on exact vesting schedule start

Insights

Compensation & Corporate Governance Analyst

TL;DR: CFO Lon Ensler received 95,000 RSUs that vest over four years; late reporting noted as administrative error.

The grant of 95,000 RSUs to the CFO is a routine equity-based compensation award intended to align management incentives with shareholder value by tying pay to continued service and future stock performance. Vesting in four equal annual installments is standard practice for executive grants and implies multi-year retention incentives. The late filing is disclosed and attributed to an administrative error, which raises a governance and disclosure process control point but does not by itself change the economics of the grant. No cash consideration was reported.

Securities Compliance Specialist

TL;DR: Material disclosure: 95,000 RSUs granted; late Form 4 filing acknowledged, signaling a compliance lapse.

The Form 4 documents a material insider transaction requiring timely reporting under Section 16. The registrant disclosed the late submission, satisfying the requirement to report the error. From a compliance perspective, the company should remediate controls to prevent recurrence. The entry confirms direct beneficial ownership of 95,000 shares-equivalent, with a $0 price consistent with restricted stock unit grants.

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Ensler Lon

(Last) (First) (Middle)

C/O MOMENTUS INC.

3901 N. FIRST STREET

(Street)

SAN JOSE CA 95134

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Momentus Inc. [ MNTS ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CFO

3. Date of Earliest Transaction (Month/Day/Year)
08/01/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units	(1)	08/01/2025	(2)	A		95,000		(3)	(3)	Class A Common Stock	95,000	$0	95,000(3)	D

Explanation of Responses:

1. Each Restricted Stock Unit (RSU) represents a contingent right to receive one share of Momentus, Inc. Class A Common Stock.

2. This transaction is being reported late due to an administrative error.

3. Represents a grant of Restricted Stock Units, which vest in four equal annual installments from Vesting Commencement Date, subject to Executive's continued Employment through each such vesting date.

Remarks:

	/s/ Lon Ensler	09/10/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What transaction did Momentus Inc. (MNTS) report on Form 4?

The company reported a grant of 95,000 Restricted Stock Units (RSUs) to CFO Lon Ensler dated 08/01/2025.

How do the RSUs to Lon Ensler vest according to the filing?

The RSUs vest in four equal annual installments from the Vesting Commencement Date, subject to continued employment through each vesting date.

Was the Form 4 filed on time for the MNTS transaction?

No. The filing states the transaction is being reported late due to an administrative error.

What type of ownership is reported for the 95,000 RSUs?

The filing reports the 95,000 RSUs as direct (D) beneficial ownership and shows a $0 price consistent with RSU grants.

Who signed the Form 4 for MNTS and when?

The Form 4 was signed by Lon Ensler on 09/10/2025.