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RAPID MICRO BIOSYSTEMS, INC.

RPID Net selling
CIK 0001380106 #4430 in the set updated 21 Sep 2026
Bought (12 mo)
$0.00
out of their own pocket, the only kind of buying there is
Sold (12 mo)
$1.14M
$0.00 on a plan · $31.45K straight out of an exercise
Sold at will
$1.11M
13 of 14 sales
Net
−$1.14M
−$1.11M against sales at will

By person

10 insiders · 20 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
Of company
Worth
Change
Longitude Capital Partners II, LLC entity
10% owner
—
$663.95K (5)
−$663.95K
0
0.000%
$0.00
—
Spignesi Robert G. Jr.
PRESIDENT AND CEO
—
$271.17K (3)
−$271.17K
1,191,973
2.5%
$5.15M
+105.6%
WIRTJES SEAN M
CHIEF FINANCIAL OFFICER
—
$122.79K (3)
−$122.79K
568,981
1.2%
$2.46M
+63.4%
Wilson John J. Addington
CHIEF OPERATING OFFICER
—
$80.10K (3)
−$80.10K
316,762
0.655%
$1.37M
+32.1%
Kollender Richard S
Director
—
—
—
133,826
0.277%
$577.87K
+38.4%
PEI MELINDA LITHERLAND
Director
—
—
—
100,687
0.208%
$434.78K
+604.1%
LOWENSTEIN INESE
Director
—
—
—
70,687
0.146%
$305.23K
+190.9%
Malloy Kirk
Director
—
—
—
60,687
0.126%
$262.05K
+11.8%
RICCIARDI NATALE S
Director
—
—
—
29,442
0.061%
$127.13K
+105.9%
Bika Dafni
Director
—
—
—
19,300
0.040%
$83.34K
—

Individual transactions

13
Insider
Date
Role
Action
Shares
Price
Amount
WIRTJES SEAN M
11 Mar 2026
CHIEF FINANCIAL OFFICER
Sell
7,480
$4.32
$32.30K
Wilson John J. Addington
11 Mar 2026
CHIEF OPERATING OFFICER
Sell
9,603
$4.32
$41.47K
Spignesi Robert G. Jr.
10 Mar 2026
PRESIDENT AND CEO
Sell
17,922
$4.11
$73.69K
WIRTJES SEAN M
20 Feb 2026
CHIEF FINANCIAL OFFICER
Sell
17,254
$3.92
$67.69K
Wilson John J. Addington
20 Feb 2026
CHIEF OPERATING OFFICER
Sell
5,403
$3.92
$21.20K
Spignesi Robert G. Jr.
19 Feb 2026
PRESIDENT AND CEO
Sell
38,327
$3.89
$148.91K
Spignesi Robert G. Jr.
9 Feb 2026
PRESIDENT AND CEO
Sell
12,840
$3.78
$48.57K
WIRTJES SEAN M
9 Feb 2026
CHIEF FINANCIAL OFFICER
Sell
6,027
$3.78
$22.80K
Wilson John J. Addington
9 Feb 2026
CHIEF OPERATING OFFICER
Sell
4,610
$3.78
$17.44K
Longitude Capital Partners II, LLC
4 Feb 2026
10% owner
Sell indirect
49,000
$3.88
$190.09K
Longitude Capital Partners II, LLC
3 Feb 2026
10% owner
Sell indirect
27,500
$4.24
$116.64K
Longitude Capital Partners II, LLC
2 Feb 2026
10% owner
Sell indirect
27,500
$4.25
$116.77K
Longitude Capital Partners II, LLC
30 Jan 2026
10% owner
Sell indirect
46,000
$4.54
$209.00K
Show all 20 transactions →

What was left out

Form 4 filings counted 30
Amendments (4/A) skipped 0
Filings about a different issuer 0
Unreadable filings 0
Joint filings 3
Sales on a Rule 10b5-1 plan 0
Sales straight out of an exercise 1
Sales at will 13
Transactions with no price 0
Shares from compensation/vesting 1,288,298
History held since 15 Jul 2021