Planned sale of 6,027 Class A shares disclosed

A holder of RPID Class A common stock has filed a notice of proposed sale under Rule 144.

Accepted by SEC EDGAR 02/09/2026 - 04:33 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

A holder of RPID Class A common stock has filed a notice of proposed sale under Rule 144. The filing covers an intended sale of 6,027 Class A shares through Fidelity Brokerage Services LLC on the NASDAQ, with an approximate sale date of 02/09/2026 and an aggregate market value of $22,798.33.

The seller acquired these 6,027 shares on 02/06/2026 via restricted stock vesting from the issuer as compensation, and represents that they are not aware of any undisclosed material adverse information about the issuer’s current or prospective operations.

FAQ

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What does the RPID Form 144 filing disclose?

The Form 144 discloses that a holder of RPID Class A shares plans to sell 6,027 shares. The proposed sale will occur on NASDAQ through Fidelity Brokerage Services LLC, with an aggregate market value of $22,798.33 and an approximate sale date of February 9, 2026.

How many RPID shares are planned to be sold and at what value?

The filing indicates a planned sale of 6,027 RPID Class A shares with an aggregate market value of $22,798.33. This value is based on market prices at the time of the notice and reflects the total estimated proceeds before any fees or commissions.

How and when were the RPID shares being sold under Form 144 acquired?

The 6,027 RPID Class A shares were acquired on February 6, 2026, through restricted stock vesting from the issuer. The filing states the nature of payment as compensation, meaning the shares were granted as part of the holder’s remuneration rather than purchased for cash.

On which exchange and through which broker will the RPID shares be sold?

The Form 144 states the RPID Class A shares are expected to be sold on NASDAQ through Fidelity Brokerage Services LLC. The broker’s address is listed as 900 Salem Street, Smithfield, RI 02917, indicating an arranged brokerage transaction for the proposed Rule 144 sale.

What representation does the seller make in the RPID Form 144 notice?

By signing the notice, the person for whose account the RPID securities are to be sold represents they do not know any material adverse information about the issuer’s current or prospective operations that has not been publicly disclosed, as required under the Form 144 instructions.

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Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001289733
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	RAPID MICRO BIOSYSTEMS, INC.
SEC File Number	001-40592
Address of Issuer	25 HARTWELL AVENUE LEXINGTON MASSACHUSETTS 02421
Phone	978-349-3200
Name of Person for Whose Account the Securities are To Be Sold	WIRTJES SEAN M
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Class A	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	6027	22798.33	39823026	02/09/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Class A	02/06/2026	Restricted Stock Vesting	Issuer			6027	02/06/2026	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks	Sale includes an amount necessary to cover a tax obligation resulting from the settlement of a vested equity award distribution.
Date of Notice	02/09/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Gerardo Ibarra-Munoz, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Sean M. Wirtjes
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)