Momentus CFO granted stock and RSU awards

Ensler Lon reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Ensler Lon reported acquisition or exercise transactions in this Form 4 filing.

Momentus Inc. Chief Financial Officer Lon Ensler received new equity compensation in the form of common stock and restricted stock units (RSUs). He was granted 5,405 shares of Class A Common Stock and 15,107 RSUs, each representing a right to receive one share of Class A Common Stock.

The RSU grant vests in three equal annual installments from the Vesting Commencement Date, contingent on his continued employment through each vesting date. Following these awards, reported direct holdings include 5,405 shares of Class A Common Stock and 23,593 RSUs, aligning his compensation further with the company’s equity performance.

Insider Trade Summary

Grant/Award: 20,512 shares

Grant/Award 2 txns

Insider Ensler Lon

Role Chief Financial Officer

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units	15,107	$0.00	$0.00
Grant/Award	Class A Common Stock	5,405	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 23,593 contracts (Direct); Class A Common Stock — 5,405 shares (Direct)

Footnotes (2)

1. F1. Each Restricted Stock Unite (RSU) represents a contingent right to receive one share of Momentus Inc. Class A Common Stock.
2. F2. Represents a grant of RSUs, which vest in three equal annual installments from Vesting Commencement Date, subject to Executive's continued Employment through each such vesting date.

Key Figures

Common stock granted: 5,405 shares RSUs granted: 15,107 RSUs RSUs after grant: 23,593 RSUs +2 more

5 metrics

Common stock granted 5,405 shares Class A Common Stock grant on May 19, 2026

RSUs granted 15,107 RSUs Restricted Stock Units granted on May 19, 2026

RSUs after grant 23,593 RSUs Total direct RSU holdings following transaction

RSU-to-share ratio 1 share per RSU Each RSU equals one share of Class A Common Stock

Vesting schedule 3 equal annual installments RSUs vest in three annual tranches from Vesting Commencement Date

Key Terms

Restricted Stock Units, contingent right, vesting, Class A Common Stock

4 terms

Restricted Stock Units financial

"Represents a grant of RSUs, which vest in three equal annual installments"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

contingent right financial

"Each Restricted Stock Unite (RSU) represents a contingent right to receive one share"

vesting financial

"RSUs, which vest in three equal annual installments from Vesting Commencement Date"

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

Class A Common Stock financial

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

Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did Momentus (MNTS) report for CFO Lon Ensler?

Momentus reported that CFO Lon Ensler received equity awards: 5,405 shares of Class A Common Stock and 15,107 restricted stock units. These awards are compensation-related grants, not open-market purchases or sales, and align his interests more closely with the company’s stock performance.

How many restricted stock units did the Momentus (MNTS) CFO receive?

The CFO received 15,107 restricted stock units. Each RSU represents a contingent right to receive one share of Momentus Class A Common Stock, subject to vesting conditions that require his continued employment with the company over the defined vesting schedule.

What is the vesting schedule for the new Momentus (MNTS) RSU grant?

The RSU grant vests in three equal annual installments starting from the Vesting Commencement Date. Vesting is conditioned on the executive’s continued employment through each vesting date, so shares are delivered over time rather than all at once.

Did the Momentus (MNTS) CFO buy or sell shares on the market in this Form 4?

No, the Form 4 shows compensation grants, not market trades. The awards are coded as acquisitions from grants (transaction code A), with no open-market purchase or sale prices, reflecting stock and RSUs issued by the company as part of executive compensation.

What are the CFO’s direct RSU holdings in Momentus (MNTS) after this filing?

After the reported transactions, direct RSU holdings total 23,593 units. These RSUs each represent a right to receive one share of Class A Common Stock, subject to the specified vesting schedule and continued employment requirements disclosed in the filing footnotes.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/21/2026 - 07:24 PM EDT Learn about SEC filing dates

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

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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)

1762 AUTOMATION PARKWAY

(Street)

SAN JOSE CALIFORNIA 95131

(City) (State) (Zip)

UNITED STATES

(Country)

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)
	Chief Financial Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/19/2026

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

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

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

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
Class A Common Stock	05/19/2026		A		5,405	A	$0	5,405	D

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)	05/19/2026		A		15,107		(2)	(2)	Class A Common Stock	15,107	$0	23,593	D

Explanation of Responses:

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

2. Represents a grant of RSUs, which vest in three equal annual installments from Vesting Commencement Date, subject to Executive's continued Employment through each such vesting date.

	/s/ John Rood, Attorney-in-Fact	05/21/2026
	** 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.
* Form 4: SEC 1474 (03-26)