Sean M. Wirtjes files to sell 17,254 Class A shares

Sean M. Wirtjes reports a proposed sale of Class A shares.

Accepted by SEC EDGAR 02/20/2026 - 04:36 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Sean M. Wirtjes reports a proposed sale of Class A shares. The notice lists 17,254 Class A shares to be sold in connection with restricted stock vesting dated 02/19/2026. The filing also reports 6,027 Class A shares sold on 02/09/2026.

FAQ

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What does Sean M. Wirtjes' Form 144 for RPID disclose?

The filing discloses a proposed sale of 17,254 Class A shares tied to restricted stock vesting on 02/19/2026. It also reports a prior sale of 6,027 Class A shares on 02/09/2026.

When are the shares in the Form 144 scheduled to be sold for RPID?

The excerpt shows the securities to be sold are dated 02/19/2026 associated with restricted stock vesting. The filing separately lists a prior sale executed on 02/09/2026.

How many Class A shares were sold in the past three months for RPID?

The filing reports 6,027 Class A shares sold during the past three months, with the transaction dated 02/09/2026. This number appears in the 'Securities Sold During The Past 3 Months' section.

What is the reason given for the shares to be sold in the Form 144?

The excerpt attributes the 17,254 Class A shares to Restricted Stock Vesting and categorizes the acquisition type as Compensation on 02/19/2026.

Which broker or account is associated with the Form 144 sale for RPID?

The filing lists Fidelity Brokerage Services LLC with an address at 900 Salem Street, Smithfield, RI, and indicates trading on NASDAQ in the securities information section.

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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	17254	67687.44	39823026	02/20/2026	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	02/19/2026	Restricted Stock Vesting	Issuer			17254	02/19/2026	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

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Sean M. Wirtjes 25 Hartwell Avenue Lexington MA 02421	Class A	02/09/2026	6027	22798.33

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	02/20/2026
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/ Daniel Tucci, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Sean Wirtjes
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)