BIOLIFE SOLUTIONS INC — Director's Dealing 2023

May 23, 2023

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: BIOLIFE SOLUTIONS INC (BLFS)
CIK: 0000834365
Period of Report: 2023-05-19

Reporting Person: Casdin Partners Master Fund, L.P. (10% Owner)
Reporting Person: Casdin Capital, LLC (10% Owner)
Reporting Person: Casdin Partners GP, LLC (10% Owner)
Reporting Person: Casdin Eli (10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2023-05-19	Common Stock, par value $.001 per share	P	50000	$22.5486	Acquired	125027	Indirect
2023-05-22	Common Stock, par value $.001 per share	P	24973	$21.8552	Acquired	150000	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock, par value $.001 per share	7571535	Direct

Footnotes

F1: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions within the range of $22.07753 to $23.0197. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote.

F2: The securities are owned directly by a client of Casdin Capital, LLC ("Casdin Capital") and may be deemed to be indirectly beneficially owned by (i) Casdin Capital, the investment adviser to such client; (ii) Casdin Partners GP, LLC ("Casdin GP"), the general partner of such client, and (iii) Eli Casdin, the managing member of Casdin Capital and Casdin GP.

F3: The securities are owned directly by the Casdin Partners Master Fund, L.P. (the "Master Fund") and may be deemed to be indirectly beneficially owned by (i) Casdin Capital, the investment adviser to the Master Fund, (ii) Casdin GP, the general partner of the Master Fund, and (iii) Eli Casdin, the managing member of Casdin Capital and Casdin GP.