// company-profile
Rapid Micro Biosystems, Inc.
RPID// activity-summary
Recent insider activity is bullish. Over the last 30 days, 15 insiders purchased shares (net $125K). Buying was led by PEI MELINDA LITHERLAND.
// 90-day insight
Over the last 90 days, Rapid Micro Biosystems, Inc. insiders bought $125K across 28 transactions with no open-market sales.
- Most active insider: PEI MELINDA LITHERLAND with 5 transactions totaling $25K.
- Largest single purchase: $25K by LOWENSTEIN INESE on May 29, 2026.
Activity skews bullish — buys outpace sales.
Institutional Ownership
Top 13F-HR holders of Rapid Micro Biosystems, Inc. as of 2026-03-31
Data source: SEC Form 13F-HR filings. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| May 29, 2026 | PEI MELINDA LITHERLAND | RPID | Award | 12,787 | $0.00 | $0K |
| May 29, 2026 | LOWENSTEIN INESE | RPID | Award | 12,787 | $1.96 | $25K |
| May 29, 2026 | Spignesi Robert G. Jr. | RPID | Award | 12,787 | $0.00 | $0K |
| May 29, 2026 | WIRTJES SEAN M | RPID | Award | 12,787 | $0.00 | $0K |
| May 29, 2026 | Malloy Kirk | RPID | Award | 12,787 | $0.00 | $0K |
45 more transactions hidden
Free account · No credit card required
Building something? Get API access →
Popular companies on Form4API
Browse insider trading activity for other actively-filed companies.