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RAPID MICRO BIOSYSTEMS, INC.

RPID Net buying
CIK 0001380106 #4430 in the set updated 22 Sep 2026
Bought (120 mo)
$6.61M
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$1.33M
$0.00 on a plan · $227.41K straight out of an exercise
Sold at will
$1.11M
13 of 19 sales
Net
+$5.28M
+$5.50M against sales at will

By person

18 insiders · 70 transactions
7.7×

Robert Spignesi holds 7.7 times base salary in stock. $5.15M of shares against $663.60K in salary for 2025.

Salary from the company's own proxy. The shares are what Robert Spignesi last reported holding, valued at $4.32, the price Class A Common Stock was last bought or sold at on the open market here, on 11 Mar 2026.

Insider
Role
Bought
Sold
Net
Holding
Worth
Change
Longitude Capital Partners II, LLC entity
10% owner
$3.00M (1)
$663.95K (5)
+$2.34M
3,557,952
$15.36M
Bain Capital Life Sciences Investors, LLC entity
10% owner
$2.00M (1)
+$2.00M
8,434,560
$36.42M
KENNEDY LEWIS MANAGEMENT LP entity
10% owner
$1.24M (18)
+$1.24M
2,904,490
$12.54M
+10.5%
Spignesi Robert G. Jr.
PRESIDENT AND CEO
$145.49K (13)
$467.12K (8)
−$321.63K
1,191,973
$5.15M
+883.8%
WIRTJES SEAN M
CHIEF FINANCIAL OFFICER
$17.69K (2)
$122.79K (3)
−$105.09K
568,981
$2.46M
+246.0%
Wilson John J. Addington
CHIEF OPERATING OFFICER
$80.10K (3)
−$80.10K
316,762
$1.37M
+418.2%
LOWENSTEIN INESE
Director
$69.50K (1)
+$69.50K
70,687
$305.23K
Kollender Richard S
Director
$50.13K (1)
+$50.13K
2,988,028
$12.90M
+106.3%
Malloy Kirk
Director
$45.34K (1)
+$45.34K
60,687
$262.05K
PEI MELINDA LITHERLAND
Director
$41.36K (4)
+$41.36K
100,687
$434.78K
Hirsch David
Director
3,422,252
$14.78M
+5,254%
Grewal Gurinder
10% owner
294,990
$1.27M
+10.4%
Paris Jonathan
SVP, GENERAL COUNSEL
128,698
$555.73K
+3,798%
VEZINA VICTORIA
CHIEF HUMAN RESOURCES OFFICER
112,608
$486.25K
+1,021%
KEYS RICHARD A
CHIEF COMMERCIAL OFFICER
43,750
$188.92K
RICCIARDI NATALE S
Director
29,442
$127.13K
Bika Dafni
Director
19,300
$83.34K
Schwartz Jeffrey Lawrence
Director
14,300
$61.75K

No percentages here. These insiders hold more than one class of share between them, and the share count on file covers one of them rather than all. Dividing the two would compare different things.

Insider
Date
Role
Action
Shares
Price
Amount
Longitude Capital Partners II, LLC
23 Jan 2026
10% owner
Sold after exercise indirect
7,739
$4.06
$31.45K
Spignesi Robert G. Jr.
14 Jul 2025
PRESIDENT AND CEO
Sold after exercise
11,881
$3.32
$39.48K
Spignesi Robert G. Jr.
11 Jul 2025
PRESIDENT AND CEO
Sold after exercise
11,874
$3.33
$39.50K
Spignesi Robert G. Jr.
10 Jul 2025
PRESIDENT AND CEO
Sold after exercise
11,617
$3.40
$39.47K
Spignesi Robert G. Jr.
9 Jul 2025
PRESIDENT AND CEO
Sold after exercise
11,247
$3.51
$39.48K
Spignesi Robert G. Jr.
8 Jul 2025
PRESIDENT AND CEO
Sold after exercise
10,824
$3.51
$38.02K

What was left out

Form 4 filings counted 129
Amendments (4/A) skipped 1
Filings about a different issuer 0
Unreadable filings 0
Joint filings 9
Sales on a Rule 10b5-1 plan 0
Sales straight out of an exercise 6
Sales at will 13
Transactions with no price 0
Shares from compensation/vesting 19,812,598
History held since 15 Jul 2021