Updated Jul 16, 2026 · Last SEC filing 2026-06-02
RAPID MICRO BIOSYSTEMS, INC. (RPID) has filed 11 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-06-02. 3 Form 8-K material event filings were reported by RPID in the last 90 days. 4 Form 144 notices of proposed sale were filed for RPID stock. InsiderAlpha tracks every RPID SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SEC CIK | 0001380106 |
|---|
| Form 4 filings (90d) | 11 |
|---|---|
| Form 8-K filings (90d) | 3 |
| Form 144 notices (90d) | 4 |
| Latest Form 4 filing | 2026-06-02 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| LOWENSTEIN INESE | Director | A — Grant or award | 12.8K | $1.96 | $25K | SEC | |
| Malloy Kirk | Director | A — Grant or award | 12.8K | $1.96 | $25K | SEC | |
| Spignesi Robert G. Jr. | PRESIDENT AND CEO | A — Grant or award | 12.8K | $1.96 | $25K | SEC | |
| PEI MELINDA LITHERLAND | Director | A — Grant or award | 12.8K | $1.96 | $25K | SEC | |
| WIRTJES SEAN M | CHIEF FINANCIAL OFFICER | A — Grant or award | 12.8K | $1.96 | $25K | SEC | |
| Kollender Richard S | Director | A — Grant or award | 19.3K | $0.00 | — | SEC | |
| Bika Dafni | Director | A — Grant or award | 19.3K | $0.00 | — | SEC | |
| LOWENSTEIN INESE | Director | A — Grant or award | 19.3K | $0.00 | — | SEC | |
| Malloy Kirk | Director | A — Grant or award | 19.3K | $0.00 | — | SEC | |
| PEI MELINDA LITHERLAND | Director | A — Grant or award | 19.3K | $0.00 | — | SEC | |
| WIRTJES SEAN M | CHIEF FINANCIAL OFFICER | S — Open-market sale | 7.5K | $4.32 | $32K | SEC | |
| Wilson John J. Addington | CHIEF OPERATING OFFICER | S — Open-market sale | 9.6K | $4.32 | $41K | SEC | |
| Spignesi Robert G. Jr. | PRESIDENT AND CEO | S — Open-market sale | 17.9K | $4.11 | $74K | SEC | |
| RICCIARDI NATALE S | Director | M — Option exercise | 842 | $0.75 | $632 | SEC | |
| Wilson John J. Addington | CHIEF OPERATING OFFICER | S — Open-market sale | 5.4K | $3.92 | $21K | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for RAPID MICRO BIOSYSTEMS, INC. (RPID). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Malloy Kirk | 5 | $25K |
| PEI MELINDA LITHERLAND | 5 | $25K |
| LOWENSTEIN INESE | 5 | $25K |
| Spignesi Robert G. Jr. | 3 | $25K |
| Bain Capital Life Sciences Investors, LLC | 3 | — |
Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in RPID insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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