RPID
insider transactionsRAPID MICRO BIOSYSTEMS, INC. — buys & sells by directors, officers and 10% owners A shareholder owning more than 10% of the company. Must report trades, but usually a weaker signal than an officer or director. (SEC Form 4).
Net shares · 365d
+1.3M
1.5M buy · 119.5K sell
Net value · 365d
-$474.1K
$0 in · $474.1K out
Sentiment · 365d
Net buying
0% buying · 100% selling
Open-market trades · 365d
10
1.5M buy · 119.5K sell
Net buy / sell volume
Not enough data to chart yet.
Tap or hover the chart for daily net volume. Green = net buying, red = net selling.
All transactions
-
Grant·A
PRESIDENT AND CEO
$0
12.8K sh
Own New
-
Grant·A
PRESIDENT AND CEO
$25.0K
12.8K sh · $1.96
Own +1%
-
Grant·A
Sean M Wirtjes KEY
CHIEF FINANCIAL OFFICER
$0
12.8K sh
Own New
-
Grant·A
Sean M Wirtjes KEY
CHIEF FINANCIAL OFFICER
$25.0K
12.8K sh · $1.96
Own +2%
-
Grant·A
Director
$0
12.8K sh
Own New
-
Grant·A
Director
$25.0K
12.8K sh · $1.96
Own +15%
-
Grant·A
Director
$0
12.8K sh
Own New
-
Grant·A
Director
$25.0K
12.8K sh · $1.96
Own +27%
-
Grant·A
Director
$0
12.8K sh
Own New
-
Grant·A
Director
$25.0K
12.8K sh · $1.96
Own +22%
-
Grant·A
Director
$0
38.7K sh
Own New
-
Grant·A
Director
$0
19.3K sh
Own +28%
-
Grant·A
Director
$0
38.7K sh
Own New
-
Grant·A
Director
$0
19.3K sh
Own +67%
-
Grant·A
Director
$0
38.7K sh
Own New
-
Grant·A
Director
$0
19.3K sh
Own +50%
-
Grant·A
Director
$0
38.7K sh
Own New
-
Grant·A
Director
$0
19.3K sh
Own +17%
-
Grant·A
Director
$0
38.7K sh
Own New
-
Grant·A
Director
$0
19.3K sh
Own New
-
Buy·P
-
Sell·S
CHIEF OPERATING OFFICER
$41.5K
9.6K sh · $4.32
Own -3%
-
Sell·S
Sean M Wirtjes KEY
CHIEF FINANCIAL OFFICER
$32.3K
7.5K sh · $4.32
Own -1%
-
Sell·S
PRESIDENT AND CEO
$73.7K
17.9K sh · $4.11
Own -2%
-
Exercise·M
Director
$632
842 sh · $0.75
Own New
-
Exercise·M
Director
$632
842 sh · $0.75
Own +3%
-
Sell·S
CHIEF OPERATING OFFICER
$21.2K
5.4K sh · $3.92
Own -2%
-
Sell·S
Sean M Wirtjes KEY
CHIEF FINANCIAL OFFICER
$67.7K
17.3K sh · $3.92
Own -3%
-
Sell·S
PRESIDENT AND CEO
$148.9K
38.3K sh · $3.89
Own -3%
-
Grant·A
CHIEF OPERATING OFFICER
$0
147.0K sh
Own New
-
Grant·A
CHIEF OPERATING OFFICER
$0
74.0K sh
Own +29%
-
Grant·A
Sean M Wirtjes KEY
CHIEF FINANCIAL OFFICER
$0
193.0K sh
Own New
-
Grant·A
Sean M Wirtjes KEY
CHIEF FINANCIAL OFFICER
$0
97.0K sh
Own +20%
-
Grant·A
PRESIDENT AND CEO
$0
528.0K sh
Own New
-
Grant·A
PRESIDENT AND CEO
$0
264.0K sh
Own +27%
-
Sell·S
CHIEF OPERATING OFFICER
$17.4K
4.6K sh · $3.78
Own -2%
-
Sell·S
PRESIDENT AND CEO
$48.6K
12.8K sh · $3.78
Own -1%
-
Sell·S
Sean M Wirtjes KEY
CHIEF FINANCIAL OFFICER
$22.8K
6.0K sh · $3.78
Own -1%
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| May 29, 2026 | Robert G. Spignesi Jr. KEY | Grant A | 12.8K | $0 |
| May 29, 2026 | Robert G. Spignesi Jr. KEY | Grant A | 12.8K | $25.0K |
| May 29, 2026 | Sean M Wirtjes KEY | Grant A | 12.8K | $0 |
| May 29, 2026 | Sean M Wirtjes KEY | Grant A | 12.8K | $25.0K |
| May 29, 2026 | Melinda Litherland Pei | Grant A | 12.8K | $0 |
| May 29, 2026 | Melinda Litherland Pei | Grant A | 12.8K | $25.0K |
| May 29, 2026 | Kirk Malloy | Grant A | 12.8K | $0 |
| May 29, 2026 | Kirk Malloy | Grant A | 12.8K | $25.0K |
| May 29, 2026 | Inese Lowenstein | Grant A | 12.8K | $0 |
| May 29, 2026 | Inese Lowenstein | Grant A | 12.8K | $25.0K |
| May 21, 2026 | Melinda Litherland Pei | Grant A | 38.7K | $0 |
| May 21, 2026 | Melinda Litherland Pei | Grant A | 19.3K | $0 |
| May 21, 2026 | Kirk Malloy | Grant A | 38.7K | $0 |
| May 21, 2026 | Kirk Malloy | Grant A | 19.3K | $0 |
| May 21, 2026 | Inese Lowenstein | Grant A | 38.7K | $0 |
| May 21, 2026 | Inese Lowenstein | Grant A | 19.3K | $0 |
| May 21, 2026 | Richard S Kollender | Grant A | 38.7K | $0 |
| May 21, 2026 | Richard S Kollender | Grant A | 19.3K | $0 |
| May 21, 2026 | Dafni Bika | Grant A | 38.7K | $0 |
| May 21, 2026 | Dafni Bika | Grant A | 19.3K | $0 |
| May 20, 2026 | Bain Capital Life Sciences Investors, LLC / Bain Capital Life Sciences Partners, LP / Bain Capital Life Sciences Fund, L.P. / BCIP Life Sciences Associates, LP | Buy P | 1.5M | — |
| Mar 11, 2026 | John J. Addington Wilson | Sell S | 9.6K | $41.5K |
| Mar 11, 2026 | Sean M Wirtjes KEY | Sell S | 7.5K | $32.3K |
| Mar 10, 2026 | Robert G. Spignesi Jr. KEY | Sell S | 17.9K | $73.7K |
| Feb 27, 2026 | Natale S Ricciardi | Exercise M | 842 | $632 |
| Feb 27, 2026 | Natale S Ricciardi | Exercise M | 842 | $632 |
| Feb 20, 2026 | John J. Addington Wilson | Sell S | 5.4K | $21.2K |
| Feb 20, 2026 | Sean M Wirtjes KEY | Sell S | 17.3K | $67.7K |
| Feb 19, 2026 | Robert G. Spignesi Jr. KEY | Sell S | 38.3K | $148.9K |
| Feb 11, 2026 | John J. Addington Wilson | Grant A | 147.0K | $0 |
| Feb 11, 2026 | John J. Addington Wilson | Grant A | 74.0K | $0 |
| Feb 11, 2026 | Sean M Wirtjes KEY | Grant A | 193.0K | $0 |
| Feb 11, 2026 | Sean M Wirtjes KEY | Grant A | 97.0K | $0 |
| Feb 11, 2026 | Robert G. Spignesi Jr. KEY | Grant A | 528.0K | $0 |
| Feb 11, 2026 | Robert G. Spignesi Jr. KEY | Grant A | 264.0K | $0 |
| Feb 9, 2026 | John J. Addington Wilson | Sell S | 4.6K | $17.4K |
| Feb 9, 2026 | Robert G. Spignesi Jr. KEY | Sell S | 12.8K | $48.6K |
| Feb 9, 2026 | Sean M Wirtjes KEY | Sell S | 6.0K | $22.8K |
About RPID insider trading
This page tracks insider transactions for RAPID MICRO BIOSYSTEMS, INC. (RPID) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.