Companies / Rapid Micro Biosystems, Inc.

Rapid Micro Biosystems, Inc.

Nasdaq: RPIDCIK 1380106LEXINGTON, MA

Financials · FY2025

Revenue$33.59M
Net income$-47.12M
Total debt$19.14M
Cash$14.69M
Diluted EPS$-1.05
Shares outstanding50.2M

Ownership

50.2M shares outstanding · as of Jul 31, 2026
5.0%Insiders
Ownership
91.0%Class A
Share classes
Class A91.03%
Class B8.97%
Insiders4.96%2,487,435
10%+ / strategic8.03%4,029,245
Institutions29.57%14,830,931
Public float57.44%28,811,945

% of common shares outstanding (exact, from the latest cover-page filing). Institutions are quarterly 13F snapshots; insiders reflect current officers & directors.

Insiders 19

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Insider% of sharesShares
Longitude Capital Partners II, LLC10% owner
8.03%4,029,245
Spignesi Robert G. Jr.CEOPRESIDENT AND CEO · Director
2.37%1,190,571
Wirtjes Sean MCHIEF FINANCIAL OFFICER
1.13%568,981
Wilson John J. AddingtonCHIEF OPERATING OFFICER
0.63%316,762
Kollender Richard SDirector
0.26%130,318
Pei Melinda LitherlandDirector
0.20%100,687
Lowenstein IneseDirector
0.14%70,687
Malloy KirkDirector
0.12%60,687
Ricciardi Natale SDirector
0.06%29,442
Bika DafniDirector
0.04%19,300

Institutional holders 46

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HolderValue% of shares
Bain Capital Life Sciences Investors, LLC$24.46M16.82%
ABG-WTT Global Life Science Capital Partners GP Ltd$5.36M3.68%
Vanguard Group Inc$2.84M1.95%
Advent International, L.P.$1.25M1.10%
Parkman Healthcare Partners LLC$1.03M0.71%
Schonfeld Strategic Advisors LLC$1.02M0.70%
Millennium Management LLC$643.0K0.56%
Geode Capital Management, LLC$561.3K0.49%
Susquehanna International Group, LLP$499.5K0.34%
Evernest Financial Advisors, LLC$468.8K0.25%

Activity

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InsidersInstitutions
What insiders are doing in this stock (Form 4).
DateActorActionSecurityValueShares ΔPosition afterImpact
Jan 30, 2026Longitude Capital Partners II, LLC
10% owner
SellClass A Common Stock$209.0K-46K
-30.67%
104,000
0.21% of shares
medium
Feb 4, 2026Longitude Capital Partners II, LLC
10% owner
SellClass A Common Stock$190.1K-49K
-100.00%
0
0.00% of shares
medium
Feb 19, 2026Spignesi Robert G. Jr.
CEO
SellClass A Common Stock$148.9K-38K
-3.13%
1,187,770
2.37% of shares
medium
Feb 2, 2026Longitude Capital Partners II, LLC
10% owner
SellClass A Common Stock$116.8K-28K
-26.44%
76,500
0.15% of shares
medium
Feb 3, 2026Longitude Capital Partners II, LLC
10% owner
SellClass A Common Stock$116.6K-28K
-35.95%
49,000
0.10% of shares
medium
Mar 10, 2026Spignesi Robert G. Jr.
CEO
SellClass A Common Stock$73.7K-18K
-1.51%
1,169,848
2.33% of shares
low
Feb 20, 2026Wirtjes Sean M
Executive
SellClass A Common Stock$67.7K-17K
-2.97%
563,674
1.12% of shares
low
Feb 9, 2026Spignesi Robert G. Jr.
CEO
SellClass A Common Stock$48.6K-13K
-1.32%
962,097
1.92% of shares
low

5%+ ownership events

Schedule 13D / 13G
FilerStance% of classSharesDate
Endeavour Medtech Growth II LPPassive13G/A———
Longitude Capital Partners II, LLCPassive13G/A———

Securities

via CUSIP / OpenFIGI
SymbolTypeMarketCUSIPFIGI
RPID——75340L104—