RPID insider buying and SEC filings, explained
Rapid Micro Biosystems, Inc. · CIK 1380106
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Insider activity in the last 12 months
Bought
$0
Insiders who bought
0
Sold (not marked 10b5-1)
$1.1M
Planned sales (10b5-1)
$0
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| May 20, 2026 | Other purchase | Bain Capital Life Sciences Fund, L.P. (10% owner) bought 4,389,000 shares in 3 share classes indirectly; the filing does not report a price. New position of 1,463,000 shares. Not marked as a 10b5-1 plan trade. Filed jointly with 3 other reporting owners. | SEC filing Filed May 22, 2026 |
| Mar 11, 2026 | Sale | John J. Addington Wilson (President / COO) sold 9,603 shares at $4.32 ($41K). Holdings down 3% to 316,762 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Mar 12, 2026 |
| Mar 11, 2026 | Sale | Sean M. Wirtjes (CFO) sold 7,480 shares at $4.32 ($32K). Holdings down 1% to 556,194 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Mar 12, 2026 |
| Mar 10, 2026 | Sale | Robert G. Spignesi Jr. (CEO and Director) sold 17,922 shares at $4.11 ($74K). Holdings down 2% to 1,169,848 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Mar 12, 2026 |
| Feb 20, 2026 | Sale | John J. Addington Wilson (President / COO) sold 5,403 shares at $3.92 ($21K). Holdings down 2% to 326,365 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 20, 2026 |
| Feb 20, 2026 | Sale | Sean M. Wirtjes (CFO) sold 17,254 shares at $3.92 ($68K). Holdings down 3% to 563,674 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 20, 2026 |
| Feb 19, 2026 | Sale | Robert G. Spignesi Jr. (CEO and Director) sold 38,327 shares at $3.89 ($149K). Holdings down 3% to 1,187,770 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 20, 2026 |
| Feb 9, 2026 | Sale | John J. Addington Wilson (President / COO) sold 4,610 shares at $3.78 ($17K). Holdings down 2% to 257,768 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 10, 2026 |
| Feb 9, 2026 | Sale | Robert G. Spignesi Jr. (CEO and Director) sold 12,840 shares at $3.78 ($49K). Holdings down 1% to 962,097 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 10, 2026 |
| Feb 9, 2026 | Sale | Sean M. Wirtjes (CFO) sold 6,027 shares at $3.78 ($23K). Holdings down 1% to 483,928 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Feb 10, 2026 |
| Feb 4, 2026 | Sale | Patrick G. Enright (10% owner) sold 49,000 shares indirectly (by entity) at $3.88 ($190K). Holdings by entity down 100% to 0 shares. Not marked as a 10b5-1 plan trade. Filed jointly with 5 other reporting owners. | SEC filing Filed Feb 6, 2026 |
| Jan 30–Feb 3, 2026 | Sale | Patrick G. Enright (10% owner) sold 101,000 shares indirectly (by entity) between Jan 30 and Feb 3 at about $4.38 ($442K). Holdings by entity down 67% to 49,000 shares. Not marked as a 10b5-1 plan trade. Filed jointly with 4 other reporting owners. | SEC filing Filed Feb 3, 2026 |
19 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
No cluster buys in the last 12 months.
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
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