Karen A. Foster - 05 Mar 2026 Form 4 Insider Report for BIOLIFE SOLUTIONS INC (BLFS)

Role: Chief Quality and Operations
Signature: /s/ Karen A. Foster
Issuer symbol: BLFS
Transactions as of: 05 Mar 2026
Net transactions value: -$1,962,998
Form type: 4
Filing time: 09 Mar 2026, 18:11:01 UTC
Previous filing: 05 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Foster Karen A.	Chief Quality and Operations	3303 MONTE VILLA PARKWAY, SUITE 310, BOTHELL	/s/ Karen A. Foster	09 Mar 2026	0001683151

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	BLFS	Common Stock	Sale	$1,952,998	-96,923	-46%	$20.15	113,742	05 Mar 2026	Direct	F1
transaction	BLFS	Common Stock	Sale	$10,000	-500	-0.44%	$20.00	113,242	09 Mar 2026	Direct	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 at prices ranging from $20.00 to $20.46, inclusive. The reporting person undertakes to provide to the registrant, any security holder of the registrant, 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.
F2	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.00 to $20.02, inclusive. The reporting person undertakes to provide to the registrant, any security holder of the registrant, 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.

Content

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.00 to $20.46, inclusive. The reporting person undertakes to provide to the registrant, any security holder of the registrant, 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.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.00 to $20.02, inclusive. The reporting person undertakes to provide to the registrant, any security holder of the registrant, 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.