BioLife CFO has 937 shares withheld for taxes

BioLife Solutions’ CFO had a small block of shares withheld to cover taxes from RSU vesting, leaving him with over two hundred thousand shares held directly.

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

Rhea-AI Filing Summary

BIOLIFE SOLUTIONS INC (BLFS) reported that its Chief Financial Officer, Troy Wichterman, had 937 shares of common stock withheld on September 18, 2026 to satisfy tax withholding obligations arising from the release of restricted stock units. After this tax-withholding disposition, he directly holds 211,286 shares of BLFS common stock.

Insider Trade Summary

Tax Withholding: 937 shares

Tax Withholding 1 txn

Insider Wichterman Troy

Role Chief Financial Officer

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock F1	937	$36.69	$34K

Holdings After Transaction: Common Stock — 211,286 shares (Direct)

Holdings Before and After: Common Stock, 212,223 to 211,286 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: 937 shares Reported price per share: $36.69 per share Shares held after transaction: 211,286 shares

3 metrics

Shares withheld for tax 937 shares Common stock withheld on September 18, 2026 to satisfy tax obligations

Reported price per share $36.69 per share Value used for the 937 withheld shares related to RSU release

Shares held after transaction 211,286 shares Direct BLFS common stock holdings of CFO after the tax-withholding disposition

Key Terms

restricted stock units, tax withholding obligations, withheld by the Issuer

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"

withheld by the Issuer financial

"Represents the number of shares withheld by the Issuer"

FAQ

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

What insider transaction did BLFS report for its CFO on this Form 4?

The CFO, Troy Wichterman, had 937 shares of BLFS common stock withheld on September 18, 2026 to satisfy tax withholding obligations related to the release of restricted stock units.

Was the BLFS CFO’s Form 4 transaction an open-market sale or purchase?

No. The Form 4 reports a tax-withholding disposition, where 937 shares were withheld by the issuer to pay tax liabilities from the vesting of restricted stock units, not an open-market buy or sell.

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

After the September 18, 2026 transaction, Chief Financial Officer Troy Wichterman directly holds 211,286 shares of BLFS common stock, as reported in the Form 4 filing.

What price per share is reported for the BLFS CFO’s withheld shares?

The filing reports a value of $36.69 per share for the 937 shares of BLFS common stock withheld to satisfy the CFO’s tax withholding obligations upon RSU release.

Does the BLFS Form 4 indicate use of a Rule 10b5-1 trading plan?

No. The filing shows the Rule 10b5-1 checkbox as not affirmed, and the transaction is described as payment of tax liability by delivering or withholding securities, not as part of a trading plan.

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

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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^*

Wichterman Troy

(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 Financial Officer

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		937(1)	D	$36.69	211,286	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/ Troy Wichterman	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)