Casdin Partners Master Fund, L.P. - Oct 15, 2025 Form 4 Insider Report for BIOLIFE SOLUTIONS INC (BLFS)

Role: 10%+ Owner
Signature: Casdin Partners Master Fund, LP, By: Casdin Partners GP, LLC,, its General Partner, By: /s/ Eli Casdin, Managing Member
Stock symbol: BLFS
Transactions as of: Oct 15, 2025
Transactions value $: -$21,410,325
Form type: 4
Date filed: 10/17/2025, 07:55 PM
Previous filing: Sep 11, 2025
Next filing: Nov 12, 2025
SEC: View on sec.gov

Reporting Owners (4)

Name	Relationship	Address	Signature	Signature date	CIK
Casdin Partners Master Fund, L.P.	10%+ Owner	1350 AVENUE OF THE AMERICAS, SUITE 2600, NEW YORK	Casdin Partners Master Fund, LP, By: Casdin Partners GP, LLC,, its General Partner, By: /s/ Eli Casdin, Managing Member	2025-10-17	0001534265
Casdin Capital, LLC	10%+ Owner	1350 AVENUE OF THE AMERICAS, SUITE 2600, NEW YORK	Casdin Capital LLC, By: /s/ Eli Casdin, Managing Member	2025-10-17	0001534261
Casdin Partners GP, LLC	10%+ Owner	1350 AVENUE OF THE AMERICAS, SUITE 2600, NEW YORK	Casdin Partners GP LLC, By: /s/ Eli Casdin, Managing Member	2025-10-17	0001534260
Casdin Eli	10%+ Owner	1350 AVENUE OF THE AMERICAS, SUITE 2600, NEW YORK	/s/ Eli Casdin, Eli Casdin	2025-10-17	0001534264

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	BLFS	Common Stock, par value $0.001 per share	Sale	-$21.4M	-750K	-11.18%	$28.55	5.96M	Oct 15, 2025	Footonote	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $28.50 to $28.8354. 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 sold at each separate price within the range set forth in this footnote.
F2	The securities are owned directly by Casdin Partners Master Fund, L.P. (the "Master Fund") and may be deemed to be indirectly beneficially owned by (i) Casdin Capital, LLC ("Casdin Capital"), the investment adviser to the Master Fund, (ii) Casdin Partners GP, LLC ("Casdin GP"), the general partner of the Master Fund, and (iii) Eli Casdin, the managing member of Casdin Capital and Casdin GP.

Content

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions within the range of $28.50 to $28.8354. 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 sold at each separate price within the range set forth in this footnote.

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