Company: RPID
Filing Date: 2025-04-08
Form Type: DEF 14A
Source: 0001380106-25-000089
Chunk: 1

Company: RAPID MICRO BIOSYSTEMS, INC.
Filing Date: 2025-04-08
Form: DEF 14A
Chunk 1
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 We believe that the virtual meeting format will allow stockholders to participate from any location and will lead to increased attendance, improved communications, lowered environmental impacts from travel and cost savings for our stockholders and the Company.

The notice of the Annual Meeting and proxy statement on the following pages describe the matters to be presented at the Annual Meeting. Details regarding how to attend the Annual Meeting and the business to be conducted at the Annual Meeting are more fully described in the accompanying notice of the Annual Meeting and proxy statement.

Whether or not you attend the Annual Meeting, it is important that your shares be represented and voted in advance of or at the Annual Meeting. We are providing proxy material access to our stockholders online at www.proxyvote.com. Online distribution of our proxy materials conserves natural resources, lowers the cost of the Annual Meeting, and expedites receipt by stockholders. The matters to be acted upon at the Annual Meeting are also described in the Notice of Internet Availability of Proxy Materials ("Notice of Internet Availability") that you will receive in the mail. Please give the proxy materials your careful attention.

You may vote online or by telephone by following the instructions on your Notice of Internet Availability. In order to vote online or by telephone, you must have the stockholder identification number provided in your Notice of Internet Availability. If you requested a proxy card by mail, you may vote by completing, signing and returning the proxy card in the postage-paid envelope provided. If you attend the Annual Meeting online, you may vote electronically at the Annual Meeting even if you previously returned your proxy card by mail or voted online or by telephone. Please review the instructions for each voting option described in the Notice of Internet Availability and in the accompanying proxy statement.

Your vote is very important to us and to our business. Prior to the Annual Meeting, we encourage all of our stockholders to review these proxy materials and vote their shares.

Thank you for your support.

Sincerely,

Robert Spignesi

President and Chief Executive Officer

Kirk D. Malloy, Ph.D.

Chair of the Board of Directors

#### TABLE OF CONTENTS

#### Notice of 2025 Annual Meeting of Stockholders

#### To be Held on Thursday, May 22, 2025

#### RAPID MICRO BIOSYSTEMS, INC.

#### 25 HARTWELL AVENUE

#### LEXINGTON, MASSACHUSETTS 02421
The 2025 Annual Meeting of Stockholders (“Annual Meeting”) of Rapid Micro Biosystems, Inc., a Delaware corporation (the “