BIOLIFE SOLUTIONS (BLFS) CTO reports 1,681-share tax withholding on RSU release

Rhea-AI Filing Summary

BIOLIFE SOLUTIONS INC Chief Technology Officer Sean Werner reported a routine tax-related share disposition. On the release of restricted stock units, the company withheld 1,681 shares of common stock at $19.12 per share to cover his tax obligations. After this withholding, Werner directly holds 48,251 shares of BIOLIFE SOLUTIONS common stock. This was not an open-market trade but an automatic share withholding mechanism tied to equity compensation.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Werner Sean

Role Chief Technology Officer

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	1,681	$19.12	$32K

Holdings After Transaction: Common Stock — 48,251 shares (Direct)

Footnotes (1)

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Form 4 Insider Transactions: What Each Field Means →

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).

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^*

Werner Sean

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Technology Officer

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		1,681	D	$19.12(1)	48,251	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/ Sean Werner	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 Sean Werner?

BIOLIFE SOLUTIONS reported that Chief Technology Officer Sean Werner had 1,681 common shares withheld to cover tax obligations from restricted stock unit release. This Form 4 shows an automatic tax-withholding disposition, not an open-market purchase or sale of BLFS shares.

How many BIOLIFE SOLUTIONS (BLFS) shares were withheld for Sean Werner’s taxes?

A total of 1,681 BIOLIFE SOLUTIONS common shares were withheld to satisfy Sean Werner’s tax obligations upon release of restricted stock units. The withholding price was $19.12 per share, reflecting a non-market, compensation-related disposition reported on Form 4.

How many BIOLIFE SOLUTIONS (BLFS) shares does Sean Werner hold after this filing?

After the tax-withholding disposition, Chief Technology Officer Sean Werner directly holds 48,251 BIOLIFE SOLUTIONS common shares. This position reflects his remaining equity stake following the automatic withholding of 1,681 shares to cover taxes on restricted stock unit vesting.

Was the BIOLIFE SOLUTIONS (BLFS) Form 4 a market sale of shares?

No. The Form 4 for BIOLIFE SOLUTIONS shows 1,681 shares withheld by the company to cover Sean Werner’s tax obligations from restricted stock unit release. It is not an open-market sale, but a standard equity-compensation tax-settlement mechanism.

What does transaction code F mean in the BIOLIFE SOLUTIONS (BLFS) Form 4?

Transaction code F in the BIOLIFE SOLUTIONS Form 4 indicates payment of exercise price or tax liability by delivering securities. Here, 1,681 common shares were withheld to satisfy Sean Werner’s tax obligations tied to restricted stock unit vesting.