Sean M. Wirtjes - 11 Feb 2026 Form 4 Insider Report for RAPID MICRO BIOSYSTEMS, INC. (RPID)

Reporting relationship: CHIEF FINANCIAL OFFICER
Issuer ticker: RPID
Reported as of: 11 Feb 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 13 Feb 2026, 19:34:39 UTC
Prior SEC filing: 10 Feb 2026
Next SEC filing: 20 Feb 2026
Source filing: View source filing
Reporting owner signature: /s/ Sean M. Wirtjes

Key filing fact

Sean M. Wirtjes filed Form 4 for RAPID MICRO BIOSYSTEMS, INC. (RPID) on 13 Feb 2026.

Key facts

This page summarizes Sean M. Wirtjes's Form 4 filing for RAPID MICRO BIOSYSTEMS, INC. (RPID).
2 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 13 Feb 2026, 19:34.

Change

Previous filing in this sequence was filed on 10 Feb 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001289733 Primary reporting owner

WIRTJES SEAN M

Relationship: CHIEF FINANCIAL OFFICER
Address: C/O RAPID MICRO BIOSYSTEMS, INC., 25 HARTWELL AVENUE, LEXINGTON
Signature: /s/ Sean M. Wirtjes
Signature date: 13 Feb 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

RPID transaction

Class A Common Stock

Award

Transaction value: $0
Shares: +97,000
Change %: +20%
Price: $0.000000
Shares after: 580,928
Date: 11 Feb 2026
Ownership: Direct
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

RPID transaction Derivative

Stock Option (Right to Buy)

Award

Transaction value: $0
Shares: +193,000
Change %
Price: $0.000000
Shares after: 193,000
Date: 11 Feb 2026
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount: 193,000
Exercise price: $4.20
Footnotes: F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

Grant of restricted stock units ("RSUs") that vest in three annual installments with 33.4% vesting on the first anniversary of February 11, 2026 (the "grant date") and 33.3% vesting on each of the second and third anniversaries of the grant date provided that the Reporting Person remains in continuous service on each vesting date.

Footnote F2

The option vests and becomes exercisable in 48 substantially equal monthly installments with the first installment vesting on March 11, 2026.