RPID

RAPID MICRO BIOSYSTEMS, INC.

Laboratory Analytical InstrumentsNasdaq<br>Emerging growth company

Total Trades

22

Buys

10

Sells

10

Largest Trade

N/A

Insiders

7

Institutional Funds

31

Inst. Value

$1M+

Activist Filings

19

Insider Trades

InsiderTitleTypeValueSharesPriceDate
Wilson John J. AddingtonCHIEF OPERATING OF…SELL$15K–$50K5K$3.92Feb 21, 2026
WIRTJES SEAN MCHIEF FINANCIAL OF…SELL$50K–$100K17K$3.92Feb 21, 2026
Spignesi Robert G. Jr.PRESIDENT AND CEOSELL$100K–$500K38K$3.89Feb 21, 2026
Wilson John J. AddingtonCHIEF OPERATING OF…SELL$15K–$50K5K$3.78Feb 10, 2026
WIRTJES SEAN MCHIEF FINANCIAL OF…SELL$15K–$50K6K$3.78Feb 10, 2026
Spignesi Robert G. Jr.PRESIDENT AND CEOSELL$15K–$50K13K$3.78Feb 10, 2026
Longitude Capital Partners II, LLC10% OwnerSELL$100K–$500K49K$3.88Feb 6, 2026
Longitude Capital Partners II, LLC10% OwnerSELL$100K–$500K109K$4.36Feb 4, 2026
Spignesi Robert G. Jr.PRESIDENT AND CEOEXERCISEN/A50KJul 15, 2025
Spignesi Robert G. Jr.PRESIDENT AND CEOSELL$50K–$100K24K$3.32Jul 15, 2025
Spignesi Robert G. Jr.PRESIDENT AND CEOEXERCISEN/A75KJul 10, 2025
Spignesi Robert G. Jr.PRESIDENT AND CEOSELL$100K–$500K34K$3.47Jul 10, 2025
PEI MELINDA LITHERLANDDirectorBUY$15K–$50K20K$1.05Nov 28, 2024
WIRTJES SEAN MCHIEF FINANCIAL OF…BUY$1K–$15K10K$0.99Sep 8, 2023
Spignesi Robert G. Jr.PRESIDENT AND CEOBUY$15K–$50K20K$0.97Aug 16, 2023
Spignesi Robert G. Jr.PRESIDENT AND CEOBUY$15K–$50K34K$0.92Aug 10, 2023
Spignesi Robert G. Jr.PRESIDENT AND CEOBUY$15K–$50K20K$0.91May 18, 2023
KENNEDY LEWIS MANAGEMENT LP10% OwnerBUY$100K–$500K69K$4.87Jun 2, 2022
KENNEDY LEWIS MANAGEMENT LP10% OwnerBUY$100K–$500K50K$4.59May 27, 2022
KENNEDY LEWIS MANAGEMENT LP10% OwnerBUY$100K–$500K97K$4.08May 19, 2022
Spignesi Robert G. Jr.President and CEOBUY$15K–$50K10K$3.79May 18, 2022
LOWENSTEIN INESEDirectorBUY$50K–$100K10K$6.95Mar 14, 2022
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Institutional Ownership

13F filings as of Dec 31, 2025 · 31 funds holding

Activist & 5%+ Owners

SC 13D/13G filings — investors holding 5%+ of outstanding shares

Endeavour Medtech Growth II LP

SC 13G/A · Feb 13, 2026

5.7%

2.3M shares

SPIGNESI ROBERT G JR

SC 13D · Aug 19, 2025

6.3%

2.6M shares

0.0%

0 shares

Endeavour Medtech Growth II LP

SC 13G/A · Jan 22, 2024

6.0%

2.3M shares

Longitude Capital Partners II, LLC

SC 13G/A · Feb 14, 2023

10.9%

4.0M shares

6.0%

2.2M shares

2.2%

801K shares

D1 Capital Partners L.P.

SC 13G/A · Feb 14, 2023

0.0%

0 shares

JPMORGAN CHASE & CO. 13-2624428

SC 13G/A · Nov 7, 2022

3.8%

1.4M shares

Kennedy Lewis Management LP

SC 13D/A · Aug 29, 2022

14.1%

5.2M shares

Kennedy Lewis Management LP

SC 13D · Jun 30, 2022

14.1%

5.2M shares

Kennedy Lewis Management LP

SC 13G/A · May 19, 2022

13.7%

5.0M shares

Kennedy Lewis Management LP

SC 13G · Mar 16, 2022

5.1%

1.8M shares

11.7%

4.0M shares

6.3%

2.2M shares

D1 Capital Partners L.P.

SC 13G · Feb 14, 2022

7.7%

2.6M shares

22.2%

7.7M shares

Colony Harvest Ltd.

SC 13G · Feb 11, 2022

6.1%

2.1M shares

JPMORGAN CHASE & CO. 13-2624428

SC 13G · Jan 26, 2022

5.1%

1.8M shares

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