BioLife Solutions (NASDAQ: BLFS) CTO has 275 shares withheld for RSU taxes

Rhea-AI Filing Summary

BioLife Solutions Inc. Chief Technology Officer Sean Werner reported a tax-withholding disposition of 275 shares of Common Stock on July 17, 2026 at $29.15 per share. These shares were withheld by the company to satisfy Werner's tax obligations arising from the release of restricted stock units. After this withholding, Werner directly holds 47,556 shares of BioLife Solutions Common Stock.

Insider Trade Summary

Net Seller: 275 shares

Net Sell 1 txn

Insider Werner Sean

Role Chief Technology Officer

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock F1	275	$29.15	$8K

Holdings After Transaction: Common Stock — 47,556 shares (Direct)

Footnotes (1)

1. F1. 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.

Key Figures

Shares withheld for taxes: 275 shares Tax withholding price: $29.15 per share Shares held after transaction: 47,556 shares

3 metrics

Shares withheld for taxes 275 shares Common Stock withheld on 2026-07-17 to satisfy tax withholding obligations

Tax withholding price $29.15 per share Per-share value applied to the 275 withheld shares

Shares held after transaction 47,556 shares Common Stock directly owned by CTO Sean Werner following the withholding

Key Terms

tax withholding obligations, restricted stock units, Common Stock

3 terms

tax withholding obligations financial

"satisfy tax withholding obligations of the reporting person that arose"

restricted stock units financial

"obligations of the reporting person that 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.

Common Stock financial

"Represents the number of shares of Common Stock withheld by the Issuer"

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.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 07/21/2026 - 06:48 PM Accepted by SEC EDGAR 07/21/2026 - 06:47 PM Learn about SEC filing dates

FAQ

What insider transaction did BLFS CTO Sean Werner report?

BioLife Solutions CTO Sean Werner reported a tax-withholding disposition of 275 Common Stock shares. The company withheld these shares at $29.15 per share to cover tax obligations triggered by the release of restricted stock units.

Did the BLFS CTO sell shares on the open market in this Form 4?

No, the filing shows no open-market sale. Instead, 275 shares were withheld by BioLife Solutions to satisfy Werner's tax withholding obligations related to vested restricted stock units, a standard non-market transaction.

How many BioLife Solutions (BLFS) shares does Sean Werner hold after this transaction?

Following the tax-withholding event, Sean Werner directly holds 47,556 shares of BioLife Solutions Common Stock. This figure reflects his direct ownership after 275 shares were withheld to cover taxes on released restricted stock units.

What was the value per share used for the BLFS CTO’s tax withholding?

The tax withholding used a value of $29.15 per share for the 275 Common Stock shares withheld. This per-share amount is disclosed as the transaction price applied in calculating the tax obligation settlement.

What triggered the BLFS share withholding for CTO Sean Werner?

The withholding was triggered by the release of restricted stock units. According to the disclosure, BioLife Solutions withheld 275 shares of Common Stock to satisfy Werner's tax withholding obligations arising from that RSU vesting event.

Is the BLFS CTO’s transaction classified as an acquisition or a disposition?

The reported transaction is classified as a disposition associated with tax withholding. Code F and the description indicate payment of tax liability by delivering or withholding securities, not a purchase or discretionary sale.

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)
07/17/2026

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	07/17/2026		F		275(1)	D	$29.15	47,556	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	07/21/2026
	** 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)