RAPID MICRO BIOSYSTEMS, INC. — Director's Dealing 2026

Feb 3, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: RAPID MICRO BIOSYSTEMS, INC. (RPID)
CIK: 0001380106
Period of Report: 2026-01-23

Reporting Person: Longitude Capital Partners II, LLC (N/A)
Reporting Person: Longitude Venture Partners II, L.P. (N/A)
Reporting Person: Longitude Prime Partners, LLC (N/A)
Reporting Person: ENRIGHT PATRICK G (N/A)
Reporting Person: Tammenoms Bakker Juliet (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-01-23	Class A Common Stock	X	629032	$0.05	Acquired	4036984	Indirect
2026-01-23	Class A Common Stock	S	7739	$4.064	Disposed	4029245	Indirect
2026-01-30	Class A Common Stock	S	46000	$4.5435	Disposed	104000	Indirect
2026-02-02	Class A Common Stock	S	27500	$4.246	Disposed	76500	Indirect
2026-02-03	Class A Common Stock	S	27500	$4.2415	Disposed	49000	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-01-23	Class A Common Stock	$0.05	X	500000	Disposed	2027-07-24	Class A Common Stock (500000)	Indirect
2026-01-23	Class A Common Stock	$0.05	X	129032	Disposed	2028-01-17	Class A Common Stock (129032)	Indirect

Footnotes

F1: Longitude Venture Partners II, L.P. ("LVPII") exercised warrants to purchase an aggregate of 629,032 shares of the Issuer's Class A common stock for $0.05 per share and paid the exercise price on a cashless basis, resulting in the Issuer withholding 7,739 shares of the Issuer's shares of Class A common stock subject to the warrant to pay the exercise price.

F2: The securities are held directly by LVPII. Longitude Capital Partners II, LLC, ("LCPII"), the general partner of LVPII, may be deemed to have voting and dispositive power with respect to the shares held by LVPII. Patrick G. Enright and Juliet Tammenoms Bakker are the managing members of LCPII and may be deemed to share voting and dispositive power over the shares held by LVPII. Each of LCPII, Mr. Enright and Ms. Tammenoms Bakker disclaim beneficial ownership of such securities and this report shall not be deemed an admission that any one of them is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of their respective pecuniary interest therein.

F3: The securities are held directly by Longitude Prime Fund, L.P. ("LPF"). Longitude Prime Partners, LLC ("LPP"), the general partner of LPF, may be deemed to have voting and dispositive power with respect to the shares held by LPF. Mr. Enright and Ms. Tammenoms Bakker are the managing members of LPP and may be deemed to have voting and dispositive power over the shares held by LPF. LPP and each of Mr. Enright and Ms. Tammenoms Bakker disclaim beneficial ownership of such shares except to the extent of their respective pecuniary interests therein.

F4: The warrant is immediately exercisable.