Sean M. Wirtjes

CIK: 0001289733

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)3 (33.3%)

Position reduction

Option Exercises (M)0 (0.0%)

Derivative conversions

Awards (A)3 (33.3%)

Compensation grants

Other (G, F, J, C, D, …)3 (33.3%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

RPID

RAPID MICRO BIOSYSTEMS, INC.

Officer

Discretionary Trading P&L

Holdings

Transaction History (9 total)

RPID
RAPID MICRO BIOSYSTEMS, INC.
May 29, 2026
Award(A)
Direct
12.8K shares at avg. $1.96$25K
RPID
RAPID MICRO BIOSYSTEMS, INC.
Mar 11, 2026
Sale(S)
Direct
7.5K shares at avg. $4.32$32K
RPID
RAPID MICRO BIOSYSTEMS, INC.
Feb 20, 2026
Sale(S)
Direct
17.3K shares at avg. $3.92$68K
RPID
RAPID MICRO BIOSYSTEMS, INC.
Feb 11, 2026
Award(A)
Direct
97K shares-
RPID
RAPID MICRO BIOSYSTEMS, INC.
Feb 9, 2026
Sale(S)
Direct
6K shares at avg. $3.78$23K
RPID
RAPID MICRO BIOSYSTEMS, INC.
Mar 9, 2025
Tax Payment(F)
Direct
7.7K shares at avg. $2.39$18K
RPID
RAPID MICRO BIOSYSTEMS, INC.
Feb 18, 2025
Award(A)
Direct
160K shares-
RPID
RAPID MICRO BIOSYSTEMS, INC.
Feb 11, 2025
Tax Payment(F)
Direct
4.6K shares at avg. $2.68$12K
RPID
RAPID MICRO BIOSYSTEMS, INC.
Feb 6, 2025
Tax Payment(F)
Direct
5.9K shares at avg. $3.10$18K

		Type	Shares	Price		Ownership
May 29, 2026	RPID RAPID MICRO BIOSYSTEMS, INC.	Award(A)	12,787	$1.96	$24,999	Direct
Mar 11, 2026	RPID RAPID MICRO BIOSYSTEMS, INC.	Sale(S)	7,480	$4.32	$32,299	Direct
Feb 20, 2026	RPID RAPID MICRO BIOSYSTEMS, INC.	Sale(S)	17,254	$3.92	$67,687	Direct
Feb 11, 2026	RPID RAPID MICRO BIOSYSTEMS, INC.	Award(A)	97,000	-	$0	Direct
Feb 9, 2026	RPID RAPID MICRO BIOSYSTEMS, INC.	Sale(S)	6,027	$3.78	$22,798	Direct
Mar 9, 2025	RPID RAPID MICRO BIOSYSTEMS, INC.	Tax Payment(F)	7,690	$2.39	$18,379	Direct
Feb 18, 2025	RPID RAPID MICRO BIOSYSTEMS, INC.	Award(A)	160,000	-	-	Direct
Feb 11, 2025	RPID RAPID MICRO BIOSYSTEMS, INC.	Tax Payment(F)	4,621	$2.68	$12,384	Direct
Feb 6, 2025	RPID RAPID MICRO BIOSYSTEMS, INC.	Tax Payment(F)	5,891	$3.10	$18,262	Direct

1-9 of 9 transactions

About WIRTJES SEAN M

WIRTJES SEAN M (SEC CIK 0001289733) files insider reports with the SEC as CHIEF FINANCIAL OFFICER of RAPID MICRO BIOSYSTEMS, INC. (RPID).

Signal8 holds 9 ownership filings by WIRTJES SEAN M, all Form 4s, filed between Feb 7, 2025 and Jun 2, 2026. Those filings report 9 transactions, from Feb 6, 2025 to May 29, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on WIRTJES SEAN M's filings is in LEXINGTON, MA.

Recent filings by WIRTJES SEAN M

May 29, 2026: Grant or award of RPID shares (Form 4, code A).
Mar 11, 2026: Open-market sale of RPID shares (Form 4, code S).
Feb 20, 2026: Open-market sale of RPID shares (Form 4, code S).
Feb 11, 2026: Grant or award of RPID shares (Form 4, code A).
Feb 9, 2026: Open-market sale of RPID shares (Form 4, code S).

Other insiders filing for RAPID MICRO BIOSYSTEMS, INC. (RPID)

Kollender Richard S, Director
Spignesi Robert G. Jr., PRESIDENT AND CEO
LOWENSTEIN INESE, Director
PEI MELINDA LITHERLAND, Director
Malloy Kirk, Director
Bika Dafni, Director

How to read Form 4 transaction codes