RPID holder plans Rule 144 sale of 12,840 shares

A shareholder in RPID has filed a notice of proposed sale under Rule 144 for 12,840 shares of Class A stock.

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

Rhea-AI Filing Summary

A shareholder in RPID has filed a notice of proposed sale under Rule 144 for 12,840 shares of Class A stock. These shares were acquired through restricted stock vesting on 02/06/2026 as compensation. The planned sale, valued at $48,569.87 based on market prices, is expected around 02/09/2026 through Fidelity Brokerage Services LLC on the NASDAQ. The filing notes that 39,823,026 shares of this class were outstanding, providing context for the size of the planned sale.

FAQ

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

What does the Form 144 filing for RPID disclose?

The Form 144 discloses a planned sale of 12,840 Class A shares of RPID under Rule 144. The shares were acquired through restricted stock vesting as compensation and are proposed to be sold on the NASDAQ through Fidelity Brokerage Services LLC.

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

The filing shows a proposed sale of 12,840 Class A shares of RPID with an aggregate market value of $48,569.87. This value reflects the market price at the time of the notice and frames the approximate dollar size of the potential transaction.

When were the RPID shares acquired and how were they obtained?

The RPID shares were acquired on 02/06/2026 through a restricted stock vesting transaction from the issuer as compensation. This means the holder received the shares as part of an equity award that vested on that date rather than through a cash purchase.

When is the RPID Rule 144 sale expected to take place?

The notice lists an approximate date of sale of 02/09/2026 for the 12,840 Class A shares. This date reflects when the shareholder currently expects to begin selling the shares on the NASDAQ, subject to market conditions and applicable Rule 144 requirements.

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

The proposed Rule 144 sale is to be executed on the NASDAQ securities exchange through Fidelity Brokerage Services LLC, located in Smithfield, Rhode Island. This broker will handle the sale of the 12,840 Class A shares for the shareholder’s account.

How many RPID shares were outstanding compared to the shares being sold?

The filing states that 39,823,026 Class A shares were outstanding. The planned sale involves 12,840 shares, which is a small portion of that outstanding amount and helps investors gauge the relative scale of the potential transaction.

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	0001853904
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	Spignesi Robert G. Jr.
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
Relationship to Issuer	Director

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	12840	48569.87	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			12840	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/ Jennifer Ruchti, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Robert G. Spignesi
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)