BioLife CEO has 2,775 shares withheld for taxes

BioLife Solutions’ CEO had shares withheld to cover taxes on vested restricted stock units, leaving a sizable direct common stock holding.

Rhea-AI Filing Summary

BIOLIFE SOLUTIONS INC (BLFS) director and President and CEO Roderick De Greef reported a Form 4 transaction involving company common stock. On September 18, 2026, 2,775 shares were withheld and disposed of to satisfy his tax withholding obligations arising from the release of restricted stock units, at a price of $36.69 per share. Following this tax-withholding transaction, he held 728,196 shares of common stock directly. No transactions were reported as made under a Rule 10b5-1 trading plan.

Insider Trade Summary

Tax Withholding: 2,775 shares

Tax Withholding 1 txn

Insider DE GREEF RODERICK

Role President and CEO

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock F1	2,775	$36.69	$102K

Holdings After Transaction: Common Stock — 728,196 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 tax: 2,775 shares Withholding price per share: $36.69 per share Shares held after transaction: 728,196 shares

3 metrics

Shares withheld for tax 2,775 shares Common stock withheld on September 18, 2026 to satisfy tax obligations

Withholding price per share $36.69 per share Value used for 2,775 shares withheld for tax obligations

Shares held after transaction 728,196 shares Directly owned BioLife Solutions common stock after the September 18, 2026 transaction

Key Terms

restricted stock units, tax withholding obligations, payment of tax liability

3 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

"to satisfy tax withholding obligations of the reporting person"

payment of tax liability financial

"Payment of tax liability by delivering or withholding securities"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did BLFS President and CEO Roderick De Greef report in this Form 4?

He reported that 2,775 shares of BioLife Solutions common stock were withheld and disposed of on September 18, 2026 to satisfy his tax withholding obligations arising from the release of restricted stock units.

At what price were the BLFS shares withheld for the CEO’s tax obligations?

The 2,775 shares of BioLife Solutions common stock were withheld at $36.69 per share in connection with satisfying Roderick De Greef’s tax withholding obligations related to the release of restricted stock units.

How many BLFS shares does the CEO hold after this reported transaction?

After the tax-withholding disposition, Roderick De Greef directly holds 728,196 shares of BioLife Solutions common stock, as reported in the Form 4 for the transaction dated September 18, 2026.

Was this BLFS Form 4 transaction a market sale or a tax withholding event?

The Form 4 describes the transaction as a payment of tax liability by withholding 2,775 shares that arose upon the release of restricted stock units, rather than as an open market purchase or sale.

Was a Rule 10b5-1 trading plan used for this BLFS Form 4 transaction?

No. The filing indicates that no Rule 10b5-1 plan is reported in connection with this transaction involving the withholding of 2,775 shares for tax obligations.

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

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Available on EDGAR 09/22/2026 - 05:12 PM Accepted by SEC EDGAR 09/22/2026 - 05:11 PM Learn about SEC filing dates

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^*

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)
09/18/2026

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	09/18/2026		F		2,775(1)	D	$36.69	728,196	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	09/22/2026
	** 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)