BioLife Solutions (BLFS) EVP sells 529 shares via 10b5-1 tax plan

Rhea-AI Filing Summary

BioLife Solutions executive Mathew Aby J., EVP & Chief Scientific Officer, sold 529 shares of common stock at $20.74 per share in an open‑market transaction. The sale was made under a Rule 10b5-1(c) trading plan adopted effective 02-24-2022 to cover tax withholding from vested restricted stock. After this sale, he directly held 392,937 common shares.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Mathew Aby J.

(Last) (First) (Middle)

3303 MONTE VILLA PARKWAY

SUITE 310

(Street)

BOTHELL WA 98021

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
BIOLIFE SOLUTIONS INC [ BLFS ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP & Chief Scientific Officer

3. Date of Earliest Transaction (Month/Day/Year)
03/03/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	03/03/2026		S(1)		529	D	$20.74	392,937	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The sale reported herein was made pursuant to a Rule 10b5-1 (c) trading plan adopted by the reporting person effective as of 02-24-2022 to satisfy tax withholding obligations in connection with the vesting of shares of restricted stock.

Remarks:

	/s/ Aby J. Mathew	03/05/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did BioLife Solutions (BLFS) EVP Mathew Aby J. report?

He reported selling 529 shares of BioLife Solutions common stock in an open-market transaction at $20.74 per share. The transaction was disclosed on Form 4 and reflects activity in his role as EVP & Chief Scientific Officer, with shares held directly afterward.

At what price did the BioLife Solutions (BLFS) insider sale occur?

The reported sale occurred at $20.74 per share for 529 shares of common stock. This price represents the transaction’s per-share value and is used to calculate the total dollar amount sold in this Form 4 disclosure.

How many BioLife Solutions (BLFS) shares does Mathew Aby J. hold after the sale?

Following the reported transaction, Mathew Aby J. directly holds 392,937 shares of BioLife Solutions common stock. This post-transaction balance reflects his remaining direct ownership after selling 529 shares in the open-market sale.

Was the BioLife Solutions (BLFS) insider sale under a Rule 10b5-1 plan?

Yes. The sale was made under a Rule 10b5-1(c) trading plan adopted effective 02-24-2022. The footnote explains the plan’s purpose was to satisfy tax withholding obligations tied to the vesting of restricted stock.

Why did BioLife Solutions (BLFS) executive Mathew Aby J. sell shares?

The filing states the sale was undertaken to satisfy tax withholding obligations related to the vesting of restricted stock. This purpose is described in the footnote referencing the Rule 10b5-1(c) trading plan adopted by the reporting person.