Casdin Capital, LLC 4

What Happened
Casdin Partners Master Fund, L.P. (reported as a 10% owner) sold a total of 1,200,000 shares of BioLife Solutions, Inc. (BLFS) in open‑market transactions across three days, generating roughly $28,125,000 in proceeds. The trades were all sales (code S) executed May 19–21, 2026.

Key Details

• Trades reported:
  • 2026-05-19: 300,000 shares @ $22.65 = $6,795,000
  • 2026-05-20: 250,000 shares @ $23.70 = $5,925,000
  • 2026-05-21: 650,000 shares @ $23.70 = $15,405,000
• Total sold: 1,200,000 shares for $28,125,000 total proceeds.
• Filing: Form 4 filed 2026-05-21 (same day as the last reported sale); filing not marked as late in the provided data.
• Shares owned after transaction: Not specified in the provided filing excerpt.
• Footnote: Securities are owned directly by Casdin Partners Master Fund, L.P. and may be indirectly beneficially owned by Casdin Capital, LLC (adviser), Casdin Partners GP, LLC (general partner), and Eli Casdin (managing member). Reporting persons disclaim beneficial ownership except to the extent of any pecuniary interest.

Context
This is institutional selling by a large (10%+) holder rather than an executive insider. Sales by funds can reflect portfolio rebalancing or liquidity needs and are not by themselves proof of company fundamentals—retail investors should consider the broader context (company news, fundamentals, and other insiders’ activity) before drawing conclusions.