Spignesi Robert G. Jr. 4

What Happened

• Robert G. Spignesi Jr., President & CEO and Director of Rapid Micro Biosystems (RPID), disposed of 17,922 shares on 2026-03-10 at $4.11 per share, generating proceeds of approximately $73,686. The transaction is reported as a sale (code S) and was an automatic sale to satisfy tax withholding associated with vested restricted stock units (RSUs).

Key Details

• Transaction date and price: 2026-03-10, 17,922 shares sold at $4.11 each.
• Proceeds: ~ $73,686.
• Shares owned after transaction: Not specified in the provided filing excerpt.
• Footnote: F1 indicates the sale was an automatic sale to cover tax obligations from RSU vesting (tax withholding).
• Filing timeliness: Reported on Form 4 filed 2026-03-12 (transaction dated 2026-03-10), which is within the typical 2-business-day reporting window.

Context

• This sale appears to be a routine, automatic tax-withholding transaction tied to RSU vesting rather than an opportunistic open-market liquidation; such withholding sales are common and don’t necessarily signal a change in insider sentiment. Purchases or non-withholding sales tend to carry more informational weight for investors.