Momentus director awarded 6,039 RSUs and exercises shares

Momentus Inc. director Kimberly A. Reed reported equity compensation activity involving Class A common stock.

Rhea-AI Filing Summary

Momentus Inc. director Kimberly A. Reed reported equity compensation activity involving Class A common stock. Reed acquired 913 shares of common stock on May 18, 2026 through the exercise or conversion of a derivative security, bringing her direct common share holdings to 2,115 shares.

On the same date, Reed was granted 6,039 Restricted Stock Units (RSUs), each representing a contingent right to receive one share of Class A common stock. According to the terms, these RSUs will vest in full on the earlier of May 18, 2027 or the day of the 2027 Annual Meeting, provided she continues serving on the Board through that vesting date.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Reed Kimberly A.

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units	6,039	$0.00	$0.00
Exercise	Class A Common Stock	913	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 6,039 contracts (Direct); Class A Common Stock — 2,115 shares (Direct)

Footnotes (2)

1. F1. Each Restricted Stock Unit (RSU) represents a contingent right to receive one share of Momentus Inc. Class A Common Stock.
2. F2. The RSUs will vest in full on the earlier to occur of May 18, 2027 or the day of the 2027 Annual Meeting, subject to the Reporting Person's continued service as a member of the Board of Directors through such vesting date.

Key Figures

Shares acquired via exercise: 913 shares Shares held after exercise: 2,115 shares RSUs granted: 6,039 RSUs +2 more

5 metrics

Shares acquired via exercise 913 shares Class A Common Stock acquired on May 18, 2026

Shares held after exercise 2,115 shares Direct Class A Common Stock holdings after May 18, 2026

RSUs granted 6,039 RSUs Equity award granted on May 18, 2026

RSU-to-share ratio 1 share per RSU Each RSU represents one Class A Common share

RSU vesting date May 18, 2027 Vests on May 18, 2027 or 2027 Annual Meeting

Key Terms

Restricted Stock Unit, RSU, Class A Common Stock, vest

4 terms

Restricted Stock Unit financial

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

A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.

RSU financial

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

Restricted stock units (RSUs) are a form of company shares given to employees as part of their compensation, usually with certain restrictions or conditions, such as remaining with the company for a set period. When these restrictions lift, employees receive actual shares that they can sell or hold. For investors, RSUs can impact a company's stock supply and reflect the company's commitment to attracting and retaining talent.

Class A Common Stock financial

"Each Restricted Stock Unit (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.

vest financial

"The RSUs will vest in full on the earlier to occur of May 18, 2027"

A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.

FAQ

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

What insider transactions did Momentus (MNTS) director Kimberly A. Reed report?

Kimberly A. Reed reported acquiring 913 shares of Momentus Class A common stock and receiving 6,039 Restricted Stock Units. Both transactions occurred on May 18, 2026 and reflect equity compensation rather than open-market buying or selling.

How many Momentus (MNTS) shares does Kimberly A. Reed hold after this Form 4?

After the reported exercise, Kimberly A. Reed holds 2,115 shares of Momentus Class A common stock directly. She also has 6,039 Restricted Stock Units outstanding, which represent a contingent right to receive additional shares upon future vesting.

What are the terms of the 6,039 RSUs granted to Kimberly A. Reed at Momentus (MNTS)?

Each of the 6,039 RSUs granted to Kimberly A. Reed represents a right to receive one share of Momentus Class A common stock. The RSUs vest in full on May 18, 2027 or the 2027 Annual Meeting date, subject to continued board service.

Does the Form 4 for Momentus (MNTS) show any insider share sales by Kimberly A. Reed?

The Form 4 does not report any open-market sales by Kimberly A. Reed. It shows an acquisition of 913 shares via derivative exercise and a grant of 6,039 Restricted Stock Units, both categorized as acquisition-type transactions.

Are Kimberly A. Reed’s 6,039 RSUs in Momentus (MNTS) fully owned today?

The 6,039 RSUs are contingent rights, not fully vested shares today. They will vest in full on May 18, 2027 or the 2027 Annual Meeting date, provided she continues serving on the Momentus Board through that time.

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

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Accepted by SEC EDGAR 05/20/2026 - 08:27 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^*

Reed Kimberly A.

(Last) (First) (Middle)

C/O MOMENTUS INC.

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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/18/2026

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	05/18/2026		M		913	A	$0	2,115	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)	05/18/2026		A		6,039		(2)	(2)	Class A Common Stock	6,039	$0	6,039	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. The RSUs will vest in full on the earlier to occur of May 18, 2027 or the day of the 2027 Annual Meeting, subject to the Reporting Person's continued service as a member of the Board of Directors through such vesting date.

	/s/ John Rood, Attorney-in-Fact	05/20/2026
	** 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)