Company: RPID
Filing Date: 2025-04-08
Form Type: DEF 14A
Source: 0001380106-25-000089
Chunk: 3

Company: RAPID MICRO BIOSYSTEMS, INC.
Filing Date: 2025-04-08
Form: DEF 14A
Chunk 3
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#### TABLE OF CONTENTS

### PROXY STATEMENT

#### RAPID MICRO BIOSYSTEMS, INC.
25 HARTWELL AVENUE, LEXINGTON, MASSACHUSETTS 02421

This proxy statement is furnished in connection with the solicitation by the Board of Directors (the “Board of Directors” or the “Board”) of Rapid Micro Biosystems, Inc. of proxies to be voted at our Annual Meeting of Stockholders to be held on Thursday, May 22, 2025 (“Annual Meeting” or “2025 Annual Meeting”), at 9:00 a.m., Eastern Time, and at any continuation, postponement, or adjournment of the Annual Meeting. The Annual Meeting will be conducted virtually via live webcast. You will be able to attend the Annual Meeting, vote electronically and submit your questions during the Annual Meeting by visiting www.virtualshareholdermeeting.com/RPID2025 and entering the 16-digit control number included in your Notice of Internet Availability of Proxy Materials ("Notice of Internet Availability"), on your proxy card or on the instructions that accompanied your proxy materials.

Only holders of record of outstanding shares of our Class A common stock (our “Class A stockholders”) at the close of business on April 7, 2025 (the “Record Date”) will be entitled to notice of, and to vote at, the Annual Meeting and any continuation, postponement, or adjournment of the Annual Meeting. Each share of our Class A common stock entitles its holder to one vote on all matters presented to our stockholders. At the close of business on the Record Date, there were 39,328,820 shares of Class A common stock outstanding and entitled to vote at the Annual Meeting. The holders of our Class B common stock are not entitled to notice of, or to vote on, any matter before the Annual Meeting.

Even if you plan to attend the Annual Meeting online, we encourage you to vote in advance of the Annual Meeting as described in this proxy statement, so that your vote will be counted if you later decide not to attend the Annual Meeting or encounter technical difficulties. If you wish to submit your vote before the Annual Meeting, then you do not have to vote at the Annual Meeting unless you wish to change your vote.

If you do not have a 16-digit control number, you may still attend the Annual Meeting as a guest in listen-only mode. To attend as a guest, please visit www.virtualshareholdermeeting.com/RPID202