RPID Form 144: 9,603 Class A Shares Proposed Sale

RPID submitted a Rule 144 notice proposing the sale of 9,603 Class A shares through Fidelity Brokerage Services LLC.

Accepted by SEC EDGAR 03/11/2026 - 03:10 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

RPID submitted a Rule 144 notice proposing the sale of 9,603 Class A shares through Fidelity Brokerage Services LLC. The shares were recorded as restricted stock vesting on 03/10/2026 and listed as compensation. The filing also lists prior dispositions by John Wilson: 4,610 shares on 02/09/2026 and 5,403 shares on 02/20/2026, with corresponding dollar figures shown in the excerpt.

FAQ

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

What does RPID's Form 144 disclose about the shares being offered?

The Form 144 lists 9,603 Class A shares proposed for sale via Fidelity Brokerage Services. The filing ties these shares to restricted stock vesting dated 03/10/2026 and classifies them as compensation in the excerpt.

Who is the broker handling the proposed sale in the RPID filing?

The proposed sale is listed under Fidelity Brokerage Services LLC with an address at 900 Salem Street, Smithfield, RI. The excerpt identifies Fidelity as the broker handling the 9,603 Class A shares proposed for sale.

Does the Form 144 show recent sales by company insiders for RPID?

Yes. The filing lists dispositions by John Wilson: 4,610 Class A shares on 02/09/2026 and 5,403 Class A shares on 02/20/2026, with dollar amounts shown alongside each transaction in the excerpt.

What is the reason given for the 9,603 shares being offered in RPID's filing?

The excerpt classifies the 9,603 Class A shares as arising from restricted stock vesting and labels the source as compensation, dated 03/10/2026, in the provided content.

On which exchange are RPID's Class A shares listed as noted in the filing?

The excerpt identifies the trading venue as NASDAQ. The filing rows include exchange information alongside the Class A security entries in the provided content.

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

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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	0001872301
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	Wilson John J. Addington
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	9603	41466.71	39823026	03/11/2026	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	03/10/2026	Restricted Stock Vesting	Issuer			9603	03/10/2026	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
John Wilson 25 Hartwell Avenue Lexington MA 02421	Class A	02/09/2026	4610	17438.25
John Wilson 25 Hartwell Avenue Lexington MA 02421	Class A	02/20/2026	5403	21195.97

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	03/11/2026
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 John Wilson
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)