Company: RPID
Filing Date: 2025-04-08
Form Type: DEF 14A
Source: 0001380106-25-000089
Chunk: 5

Company: RAPID MICRO BIOSYSTEMS, INC.
Filing Date: 2025-04-08
Form: DEF 14A
Chunk 5
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 in advance of the Annual Meeting, visit www.proxyvote.com before noon Eastern Time on May 21, 2025 and enter your control number.

All stockholders—even if you plan on attending the Annual Meeting—are encouraged to vote their shares in advance online or, if you requested printed copies of the proxy materials, by phone or by mail, to ensure that your vote will be represented at the Annual Meeting. For more detailed information, see the section entitled “How Do I Vote” beginning on page 5 of this proxy statement.

#### Proxy Materials Are Available on the Internet
Rapid Micro Biosystems uses the Internet as the primary means of furnishing proxy materials to stockholders. We send a Notice of Internet Availability to our stockholders with instructions on how to access the proxy materials online at proxyvote.com or request a printed copy of materials.

Stockholders may follow the instructions in the Notice of Internet Availability to elect to receive future proxy materials in print by mail or electronically by email. We encourage stockholders to take advantage of the availability of proxy materials online to reduce environmental impact and mailing costs.

Rapid Micro Biosystems’ proxy materials are also available at investors.rapidmicrobio.com.

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#### TABLE OF CONTENTS

### PROPOSALS
At the Annual Meeting, our stockholders will be asked:

(1) To elect Inese Lowenstein and Dafni Bika as Class I Directors to serve until the 2028 Annual Meeting of Stockholders and until their respective successors have been duly elected and qualified, or until their earlier death, resignation or removal;

(2) To ratify the appointment of PricewaterhouseCoopers LLP as our independent registered public accounting firm for the fiscal year ending December 31, 2025; and

(3) To transact such other business as may properly come before the Annual Meeting or any continuation, postponement, or adjournment of the Annual Meeting.

We know of no other business that will be presented at the Annual Meeting. If any other matter properly comes before the stockholders for a vote at the Annual Meeting, however, the proxy holders named on the Company’s proxy card will vote your shares in accordance with their best judgment.

### RECOMMENDATIONS OF THE BOARD
The Board recommends that you vote your shares as indicated below. If you return a properly completed proxy card, or vote your shares by telephone or online, your shares of Class A common stock will be voted on your behalf as you direct. If not otherwise specified,