Rapid Micro Biosystems RPID Insider Ownership

NASDAQ RPID
$1.20 -0.02 (-1.64%)
As of: Sep 9, 2026 · 11:17 AM EDT

Insider Holdings by Owner

18.12Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026
Insider Ownership
8.96%
0% pp QoQ
Shares Held by Insiders
4.03Mn
filed for Sep 2026
0.00% QoQ
Shares Outstanding
44.96Mn
44,956,131 shares
Direct Holdings
0
Indirect: 4.03Mn
Net Shares Traded (QoQ)
0
no net change in Sep 2026
Insiders Holding Shares
17
with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding
Latest
Average ownership
Peak ownership

Shares Purchased/Sold by Insiders

Bought Sold
Latest quarter
Net over range
Buying quarters

Insider Ownership Summary

Quarter ending 30 Sep, 2026

RPID's three largest insider shareholders as of September 09, 2026 are Capital Life Sciences Investors, Llc Bain (TenPercentOwner, 8.43Mn shares), Capital Partners Ii, Llc Longitude (TenPercentOwner, 4.03Mn shares), Capital Partners Ii, Llc Longitude (TenPercentOwner, 4.03Mn shares).

Form 4 Holdings

Insiders Holding RPID

Insiders 17
Shares held 18.12Mn
Of outstanding 40.30%
# Insider Position Direct Indirect Total Share of Insiders Last Filed
1 Capital Life Sciences Investors, Llc Bain TenPercentOwner 0 8,434,560 8,434,560 46.5% 21 Jul, 2021
2 Capital Partners Ii, Llc Longitude TenPercentOwner 0 4,029,245 4,029,245 22.2% 06 Feb, 2026
3 Lewis Management Lp Kennedy TenPercentOwner 0 2,904,490 2,904,490 16.0% 06 Jun, 2022
4 Robert G. Jr. Spignesi President And Ceo 1,191,973 0 1,191,973 6.6% 24 Jul, 2026
5 Sean M Wirtjes Chief Financial Officer 568,981 0 568,981 3.1% 02 Jun, 2026
6 John J. Addington Wilson Chief Operating Officer 316,762 0 316,762 1.7% 12 Mar, 2026
7 Jonathan Paris Svp, General Counsel 128,698 0 128,698 0.7% 13 Mar, 2023
8 Victoria Vezina Chief Human Resources Officer 112,608 0 112,608 0.6% 12 Mar, 2024
9 Richard S Kollender Director 111,018 0 111,018 0.6% 27 May, 2025
10 Inese Lowenstein Director 70,687 0 70,687 0.4% 02 Jun, 2026
11 Melinda Litherland Pei Director 68,600 0 68,600 0.4% 27 May, 2025
12 Kirk Malloy Director 60,687 0 60,687 0.3% 02 Jun, 2026
13 Richard A Keys Chief Commercial Officer 43,750 0 43,750 0.2% 15 Feb, 2022
14 Natale S Ricciardi Director 29,442 0 29,442 0.2% 02 Mar, 2026
15 Dafni Bika Director 19,300 0 19,300 0.1% 26 May, 2026
16 Jeffrey Lawrence Schwartz Director, TenPercentOwner 14,300 0 14,300 0.1% 28 May, 2024
17 David Hirsch Director 14,300 0 14,300 0.1% 28 May, 2024

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

714 Insider Transactions

Source SEC Form 4
Latest quarter Sep 2026
Download Data
Date Insider Position Transaction Shares Price Value Shares Held After Ownership
22 Jul, 2026 Robert G. Jr. Spignesi President And Ceo Acquired M 1,402 $0.75 $1.05K 1,191,973 Direct
22 Jul, 2026 Robert G. Jr. Spignesi President And Ceo Disposed M 1,402 $0.00 $0 0 Direct
29 May, 2026 Inese Lowenstein Director Acquired A 12,787 $1.96 $25.00K 70,687 Direct
29 May, 2026 Robert G. Jr. Spignesi President And Ceo Acquired A 12,787 $1.96 $25.00K 1,190,571 Direct
29 May, 2026 Kirk Malloy Director Acquired A 12,787 $1.96 $25.00K 60,687 Direct
29 May, 2026 Sean M Wirtjes Chief Financial Officer Acquired A 12,787 $1.96 $25.00K 568,981 Direct
29 May, 2026 Inese Lowenstein Director Acquired A 12,787 $0.00 $0 12,787 Direct
29 May, 2026 Robert G. Jr. Spignesi President And Ceo Acquired A 12,787 $0.00 $0 12,787 Direct
29 May, 2026 Sean M Wirtjes Chief Financial Officer Acquired A 12,787 $0.00 $0 12,787 Direct
29 May, 2026 Robert G. Jr. Spignesi President And Ceo Acquired A 12,787 $0.00 $0 12,787 Direct
29 May, 2026 Kirk Malloy Director Acquired A 12,787 $0.00 $0 12,787 Direct
29 May, 2026 Sean M Wirtjes Chief Financial Officer Acquired A 12,787 $0.00 $0 12,787 Direct
29 May, 2026 Inese Lowenstein Director Acquired A 12,787 $0.00 $0 12,787 Direct
29 May, 2026 Kirk Malloy Director Acquired A 12,787 $0.00 $0 12,787 Direct
21 May, 2026 Inese Lowenstein Director Acquired A 19,300 $0.00 $0 57,900 Direct
21 May, 2026 Dafni Bika Director Acquired A 19,300 $0.00 $0 19,300 Direct
21 May, 2026 Kirk Malloy Director Acquired A 19,300 $0.00 $0 47,900 Direct
21 May, 2026 Inese Lowenstein Director Acquired A 38,700 $0.00 $0 38,700 Direct
21 May, 2026 Dafni Bika Director Acquired A 38,700 $0.00 $0 38,700 Direct
21 May, 2026 Kirk Malloy Director Acquired A 38,700 $0.00 $0 38,700 Direct