RAPID MICRO BIOSYSTEMS (RPID) director Kirk Malloy awarded RSUs and stock options

Rhea-AI Filing Summary

RAPID MICRO BIOSYSTEMS, INC. director Kirk Malloy reported equity compensation awards on Class A Common Stock. He received 19,300 restricted stock units (RSUs) at no cash cost, increasing his directly held common shares to 47,900 after the award.

He was also granted a stock option for 38,700 shares of Class A Common Stock with an exercise price of $2.0700 per share, expiring on May 20, 2036. Both the RSUs and the option vest in full on the earlier of the first anniversary of the grant date or immediately before the next annual stockholders’ meeting, if he remains in continuous service. In addition, an indirect holding of 10,000 shares is reported in a family trust where he shares investment power.

Insights

Equity compensation analyst

Director received time-based RSUs and stock options, indicating routine board compensation.

Director Kirk Malloy was granted 19,300 RSUs and a 38,700-share stock option with a $2.0700 exercise price. These are compensation awards, not open-market purchases, so they do not reflect discretionary buying or selling decisions.

Both awards vest in full on the earlier of the first anniversary of the grant date or immediately before the next annual stockholders’ meeting, contingent on continued service. The filing also lists 10,000 shares held indirectly in a family trust, clarifying his combined direct and indirect exposure but without any sale activity.

Insider Trade Summary

3 transactions reported

Mixed 3 txns

Insider Malloy Kirk

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Stock Option (Right to Buy)	38,700	$0.00	--
Grant/Award	Class A Common Stock	19,300	$0.00	--
holding	Class A Common Stock	--	--	--

Holdings After Transaction: Stock Option (Right to Buy) — 38,700 shares (Direct); Class A Common Stock — 47,900 shares (Direct); Class A Common Stock — 10,000 shares (Indirect, By Trust)

Footnotes (1)

1. Grant of restricted stock units ("RSUs") that vests in full on the earlier of (i) the first anniversary of the Grant Date, or (ii) the day immediately prior to the date of the next annual meeting of the stockholders of the Company provided that the Reporting Person remains in continuous service on such vesting date. Shares held in family trust as to which the Reporting Person shares investment power and the Reporting Person and/or immediate family members are beneficiaries. The option shall vest and become exercisable in full on the earlier of (i) the first anniversary of the Grant Date, or (ii) the day immediately prior to the date of the next annual meeting of the stockholders of the Company provided that the Reporting Person remains in continuous service on such vesting date.

Key Figures

RSU grant size: 19,300 shares Option grant size: 38,700 shares Option exercise price: $2.0700 per share +3 more

6 metrics

RSU grant size 19,300 shares Restricted stock units granted to director on Class A Common Stock

Option grant size 38,700 shares Stock Option (Right to Buy) underlying Class A Common Stock

Option exercise price $2.0700 per share Exercise price for 38,700-share stock option grant

Option expiration May 20, 2036 Expiration date of stock option grant

Direct shares after grant 47,900 shares Total direct Class A Common Stock held after RSU award

Indirect trust holding 10,000 shares Class A Common Stock held in family trust with shared investment power

Key Terms

restricted stock units ("RSUs"), family trust, Stock Option (Right to Buy), Grant Date, +1 more

5 terms

restricted stock units ("RSUs") financial

"Grant of restricted stock units ("RSUs") that vests in full on the earlier of"

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

family trust financial

"Shares held in family trust as to which the Reporting Person shares investment power"

Stock Option (Right to Buy) financial

"security_title": "Stock Option (Right to Buy)"

Grant Date financial

"on the earlier of (i) the first anniversary of the Grant Date, or (ii)"

The grant date is the day a company formally gives an employee or contractor the right to receive stock-based compensation, such as stock options or restricted shares. It matters to investors because it fixes key terms—like the price, the start of the ownership clock, and when the award will affect the company’s financial statements and share count—so it can influence dilution, reported expenses, and potential future selling pressure.

annual meeting of the stockholders financial

"the day immediately prior to the date of the next annual meeting of the stockholders of the Company"

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

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 05/26/2026 - 07:27 PM Accepted by SEC EDGAR 05/26/2026 - 07:27 PM Learn about SEC filing dates

FAQ

What equity awards did Kirk Malloy report on his Form 4 for RPID?

He reported a grant of 19,300 restricted stock units and a stock option for 38,700 shares of Class A Common Stock. Both awards were granted at $0.00 per share as equity compensation rather than cash purchases.

What is the vesting schedule of Kirk Malloy’s new RPID RSUs?

The 19,300 RSUs vest in full on the earlier of the first anniversary of the grant date or the day immediately before the next annual stockholders’ meeting, provided Malloy remains in continuous service with the company through that vesting date.

What are the key terms of Kirk Malloy’s new RPID stock option grant?

He received a stock option on 38,700 shares of Class A Common Stock with an exercise price of $2.0700 per share. The option vests on the same schedule as the RSUs and expires on May 20, 2036, if not earlier exercised or terminated.

How many RPID shares does Kirk Malloy hold directly after these transactions?

After the RSU grant, Malloy’s direct holdings of Class A Common Stock increased to 47,900 shares. This figure reflects the total direct ownership reported following the equity award, separate from his indirect holdings through a family trust.

What indirect RPID holdings are reported for Kirk Malloy on this Form 4?

The filing lists 10,000 shares of Class A Common Stock held indirectly in a family trust. Malloy shares investment power over these trust-held shares, and the trust benefits him and/or his immediate family members, according to the footnote disclosure.

Does Kirk Malloy’s Form 4 for RPID show any stock sales or open-market purchases?

The Form 4 shows equity grants only, specifically RSUs and stock options awarded as compensation. There are no reported open-market purchases or sales; the awards were granted at $0.00 per share and are subject to future vesting conditions.

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^*

Malloy Kirk

(Last) (First) (Middle)

C/O RAPID MICRO BIOSYSTEMS, INC.

25 HARTWELL AVENUE

(Street)

LEXINGTON MASSACHUSETTS 02421

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
RAPID MICRO BIOSYSTEMS, INC. [ RPID ]

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)
05/21/2026

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	05/21/2026		A		19,300(1)	A	$0	47,900	D
Class A Common Stock								10,000	I	By Trust(2)

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
Stock Option (Right to Buy)	$2.07	05/21/2026		A		38,700		(3)	05/20/2036	Class A Common Stock	38,700	$0	38,700	D

Explanation of Responses:

1. Grant of restricted stock units ("RSUs") that vests in full on the earlier of (i) the first anniversary of the Grant Date, or (ii) the day immediately prior to the date of the next annual meeting of the stockholders of the Company provided that the Reporting Person remains in continuous service on such vesting date.

2. Shares held in family trust as to which the Reporting Person shares investment power and the Reporting Person and/or immediate family members are beneficiaries.

3. The option shall vest and become exercisable in full on the earlier of (i) the first anniversary of the Grant Date, or (ii) the day immediately prior to the date of the next annual meeting of the stockholders of the Company provided that the Reporting Person remains in continuous service on such vesting date.

Remarks:

	/s/ Robert Spignesi, Attorney-in-Fact for Kirk Malloy	05/26/2026
	** 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)