[Form 4] BIOLIFE SOLUTIONS INC Insider Trading Activity

Rhea-AI Filing Summary

BIOLIFE SOLUTIONS INC Chief Technology Officer Sean Werner reported a small share disposition related to taxes, not an open-market trade. On the transaction date, 420 shares of Common Stock were withheld by the company at a price of $26.04 per share to cover tax withholding obligations that arose when restricted stock units were released. After this tax-withholding event, Werner held a remaining direct position of 47,831 Common Stock shares.

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	420	$26.04	$11K

Holdings After Transaction: Common Stock — 47,831 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Shares withheld for taxes: 420 shares Withholding price per share: $26.04 per share Shares held after transaction: 47,831 shares

3 metrics

Shares withheld for taxes 420 shares Tax withholding on RSU release

Withholding price per share $26.04 per share Value used for 420 withheld shares

Shares held after transaction 47,831 shares Direct Common Stock holdings post-transaction

Key Terms

restricted stock units, tax withholding obligations, Common Stock, Form 4

4 terms

restricted stock units financial

"arose upon the release of restricted stock units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

tax withholding obligations financial

"withheld by the Issuer to satisfy tax withholding obligations"

Common Stock financial

"security_title: "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Form 4 regulatory

"INSIDER FILING DATA (Form 4)"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

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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)
06/18/2026

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	06/18/2026		F		420(1)	D	$26.04	47,831	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	06/22/2026
	** 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 INC (BLFS) report for Sean Werner?

BIOLIFE SOLUTIONS INC reported that Chief Technology Officer Sean Werner had 420 shares of Common Stock withheld to cover tax obligations tied to restricted stock units. This Form 4 shows a tax-withholding disposition, not an open-market purchase or sale of shares.

Was the BLFS Form 4 transaction an open-market sale of shares?

No, the BLFS Form 4 transaction was not an open-market sale. The 420 shares were withheld by the issuer to satisfy Sean Werner’s tax withholding obligations upon the release of restricted stock units, a routine compensation-related adjustment rather than a discretionary trade.

How many BIOLIFE SOLUTIONS (BLFS) shares were involved in the tax withholding event?

The filing states that 420 shares of BIOLIFE SOLUTIONS Common Stock were withheld at $26.04 per share. These shares covered Chief Technology Officer Sean Werner’s tax obligations related to the vesting of restricted stock units, reducing his position only slightly.

How many BLFS shares does Sean Werner hold after this Form 4 transaction?

After the tax-withholding disposition, Sean Werner directly holds 47,831 shares of BIOLIFE SOLUTIONS Common Stock. This remaining position, disclosed in the Form 4, shows that the 420 withheld shares represent a very small portion of his overall holdings.

What does the tax-withholding code F mean in the BLFS Form 4 filing?

Code F in the BLFS Form 4 indicates a tax-withholding disposition, where shares are delivered to the issuer to cover tax liabilities. In this case, 420 shares were withheld to satisfy Sean Werner’s tax obligations upon the release of restricted stock units.