Foster Karen A. 4

What Happened

• Karen A. Foster, Chief Quality and Operations Officer at BioLife Solutions (BLFS), had 1,907 shares withheld by the company to satisfy tax withholding obligations arising from the release (vesting) of restricted stock units (RSUs). The withholding was recorded at $19.12 per share for a total value of $36,462. This is a tax-withholding disposition (not an open-market sale or purchase).

Key Details

• Transaction date: 2026-03-19
• Price per share: $19.12; Shares withheld/disposed: 1,907; Total value: $36,462
• Shares owned after the transaction: Not specified in the provided filing
• Footnote: F1 — shares were withheld by the issuer to satisfy the reporting person’s tax withholding obligations upon RSU release
• Filing date: 2026-03-23 (filed on the second business day after the transaction, i.e., timely)

Context

• This was a routine tax-withholding event tied to RSU vesting (a net share settlement), not an open-market sale or buy. Such withholdings are common when restricted shares vest and generally reflect tax obligations rather than an insider signaling confidence or concern about the stock.
• For investors tracking insider activity, purchases and open-market sales can be more informative than tax-related withholdings.