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Rapid Micro Biosystems, Inc. planned insider sales

In the last twelve months insiders at Rapid Micro Biosystems, Inc. filed 13 Form 144 notices of planned sales, 144,466 shares worth $517,947 at the time of filing, from 3 sellers. The latest, filed 8 July 2026: Wilson John J. Addington (former officer), 10,000 shares worth $17,044, planned for around 8 July 2026 through Fidelity Brokerage Services LLC.

FiledSellerRelationshipSharesValuePlanned saleSold, per Form 4BrokerHow acquiredFiling
8 July 2026Wilson John J. AddingtonFormer Officer10,000$17,0448 July 2026No matching Form 4 saleFidelity Brokerage Services LLCStock Option ExerciseForm 144
1 July 2026Wilson John J. AddingtonFormer Officer6,312$11,0461 July 2026No matching Form 4 saleFidelity Brokerage Services LLCStock Option ExerciseForm 144
22 June 2026Wilson John J. AddingtonFormer Officer3,688$6,45422 June 2026No matching Form 4 saleFidelity Brokerage Services LLCStock Option ExerciseForm 144
10 June 2026Wilson John J. AddingtonFormer Officer5,000$9,34910 June 2026No matching Form 4 saleFidelity Brokerage Services LLCStock Option ExerciseForm 144
11 March 2026Wirtjes Sean MOfficer7,480$32,29911 March 20267,480 shares from 11 March 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
11 March 2026Wilson John J. AddingtonOfficer9,603$41,46711 March 20269,603 shares from 11 March 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
10 March 2026Spignesi Robert G. Jr.Officer, Director17,922$73,68610 March 202617,922 shares from 10 March 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
20 February 2026Wilson John J. AddingtonOfficer5,403$21,19620 February 20265,403 shares from 20 February 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
20 February 2026Wirtjes Sean MOfficer17,254$67,68720 February 202617,254 shares from 20 February 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
19 February 2026Spignesi Robert G. Jr.Officer, Director38,327$148,91219 February 202638,327 shares from 19 February 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
9 February 2026Wilson John J. AddingtonOfficer4,610$17,4389 February 20264,610 shares from 9 February 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
9 February 2026Wirtjes Sean MOfficer6,027$22,7989 February 20266,027 shares from 9 February 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
9 February 2026Spignesi Robert G. Jr.Officer, Director12,840$48,5709 February 202612,840 shares from 9 February 2026Fidelity Brokerage Services LLCRestricted Stock VestingForm 144
A Form 144 is the notice an insider files with the SEC before selling restricted or control shares over the Rule 144 thresholds; it says what may be sold, not what was.
Read moreValue is the filer's own aggregate market value. Sold, per Form 4: the same seller's open-market sales on Form 4 from the notice's date to 90 days after, added up, as they appear on the insiders page; a holder who files no Form 4, such as some large holders, never shows one. What is a Form 144?