BioLife Solutions (BLFS) CEO uses 11,101 shares for tax withholding

Rhea-AI Filing Summary

BioLife Solutions Inc. President and CEO Roderick De Greef had 11,101 shares of Common Stock withheld to cover taxes on restricted stock units that vested. These shares were delivered back to the company as a tax-withholding disposition, not sold on the open market. Following this transaction, he directly holds 733,746 shares of BioLife Solutions common stock.

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

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

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^*

DE GREEF RODERICK

(Last) (First) (Middle)

3303 MONTE VILLA PARKWAY

SUITE 310

(Street)

BOTHELL WASHINGTON 98021

(City) (State) (Zip)

UNITED STATES

(Country)

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

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

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President and CEO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/19/2026

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

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

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

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	03/19/2026		F		11,101	D	$19.12(1)	733,746	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. Represents the number of shares withheld by the Issuer to satisfy tax withholding obligations of the reporting person that arose upon the release of restricted stock units.

Remarks:

	/s/ Roderick de Greef	03/23/2026
	** 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.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did BioLife Solutions (BLFS) report for its CEO?

BioLife Solutions reported that President and CEO Roderick De Greef had 11,101 common shares withheld to satisfy tax obligations from vested restricted stock units. This was a tax-withholding disposition, not an open-market sale of shares.

How many BioLife Solutions (BLFS) shares were involved in the CEO’s tax withholding?

The transaction involved 11,101 shares of BioLife Solutions common stock. These shares were withheld by the company to cover the CEO’s tax liability arising from the release of restricted stock units, according to the filing’s footnote.

Did BioLife Solutions (BLFS) CEO sell shares in the latest insider transaction?

The CEO did not execute an open-market sale. Instead, 11,101 shares were withheld by BioLife Solutions to pay tax obligations triggered when his restricted stock units were released, which is a common administrative transaction.

How many BioLife Solutions (BLFS) shares does the CEO hold after this transaction?

After the tax-withholding transaction, President and CEO Roderick De Greef directly holds 733,746 shares of BioLife Solutions common stock. This figure reflects his position following the 11,101-share tax-withholding disposition reported in the filing.

What does a tax-withholding disposition mean for BioLife Solutions (BLFS) insiders?

A tax-withholding disposition means the company withholds shares to cover income taxes when awards like restricted stock units vest. For BioLife Solutions, the CEO delivered 11,101 shares back to the issuer instead of selling shares in the market.