RPID Rule 144: 6,312 Class A Shares Listed for Sale

RPID filed a Rule 144 notice reporting Class A shares to be sold and recent dispositions by an individual holder.

Rhea-AI Filing Summary

RPID filed a Rule 144 notice reporting Class A shares to be sold and recent dispositions by an individual holder.

The filing lists 6,312 Class A shares to be sold via a stock option exercise for cash on 07/01/2026. It also records prior sales of 5,000 Class A shares on 06/10/2026 and 3,688 Class A shares on 06/22/2026. Shares outstanding are shown as 41,669,673 as of 07/01/2026.

Insights

Securities Compliance Counsel

Rule 144 notice lists a planned option-based sale and recent dispositions by an insider.

The filing shows 6,312 Class A shares designated for sale via a stock option exercise on 07/01/2026. It separately records two dispositions by John Wilson of 5,000 and 3,688 shares in June 2026.

Compliance implications depend on holding-period and volume conditions under Rule 144; cash‑flow treatment is described as cash for the exercise. Subsequent filings may show settlement details or broker handling.

Key Figures

Planned shares to be sold: 6,312 shares Prior disposition 1: 5,000 shares Prior disposition 2: 3,688 shares +3 more

6 metrics

Planned shares to be sold 6,312 shares Stock Option Exercise on <date>07/01/2026</date>

Prior disposition 1 5,000 shares Sold on <date>06/10/2026</date>

Prior disposition 2 3,688 shares Sold on <date>06/22/2026</date>

Shares outstanding 41,669,673 shares Outstanding as of <date>07/01/2026</date>

Consideration shown (first disposition) $9,349.00 Appears adjacent to 5,000-share line

Consideration shown (second disposition) $6,454.00 Appears adjacent to 3,688-share line

Key Terms

Rule 144, Stock Option Exercise, Class A

3 terms

Rule 144 regulatory

"Security class line shows '144: Securities To Be Sold' indicating a Rule 144 notice"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Stock Option Exercise financial

"Line states 'Stock Option Exercise' as the method for the 6,312 shares"

A stock option exercise is the act of using a previously granted right to buy shares of a company's stock at a specific, predetermined price by paying that price and receiving the shares. It matters to investors because exercising changes who owns the shares (which can dilute existing ownership), can trigger taxable events and shift potential gains or losses, and affects voting power and the company’s outstanding share count—like turning a voucher into an actual product that becomes part of circulating supply.

Class A financial

"Multiple references to 'Class A' as the security class being transacted"

Class A denotes a specific group of a company’s shares that carry a particular set of rights—most commonly different voting power or dividend priority compared with other share classes. Think of it like different seats on a bus where some seats let you steer and others only ride: knowing whether a share is Class A tells investors how much influence they have over company decisions and how returns might be distributed, which affects control and value.

FAQ

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

What does RPID's Rule 144 filing report?

It reports 6,312 Class A shares intended for sale via a stock option exercise on 07/01/2026. The filing also lists prior dispositions of 5,000 and 3,688 Class A shares in June 2026.

Who sold shares recently according to the filing for RPID?

The filing records transactions by John Wilson: 5,000 Class A shares sold on 06/10/2026 and 3,688 Class A shares sold on 06/22/2026, with amounts shown alongside each disposition.

How many shares outstanding does the filing show for RPID?

The filing lists 41,669,673 shares outstanding as of 07/01/2026. This figure appears on the securities information line and provides a company-level context for the reported transactions.

What method and payment type are indicated for the planned sale?

The planned disposition of 6,312 Class A shares is labeled a Stock Option Exercise with cash proceeds (payment type shown as Cash) and a settlement date of 07/01/2026.

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

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Accepted by SEC EDGAR 07/01/2026 - 01:28 PM Learn about SEC filing dates

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	Former 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	6312	11046.00	41669673	07/01/2026	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	07/01/2026	Stock Option Exercise	Issuer			6312	07/01/2026	Cash

* 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	06/10/2026	5000	9349.00
John Wilson 25 Hartwell Avenue Lexington MA 02421	Class A	06/22/2026	3688	6454.00

144: Remarks and Signature

Remarks
Date of Notice	07/01/2026
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/Wade Moss, 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)