BioLife CFO has 1,026 shares withheld for taxes

BioLife Solutions’ CFO had 1,026 BLFS shares withheld for tax obligations tied to RSU vesting, leaving him with 212,223 directly held shares.

Available on EDGAR 09/10/2026 - 04:50 PM EDT Accepted by SEC EDGAR 09/10/2026 - 04:50 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

BIOLIFE SOLUTIONS INC (BLFS) reported that Chief Financial Officer Troy Wichterman had 1,026 shares of common stock withheld on September 8, 2026 to satisfy his tax withholding obligations arising from the release of restricted stock units. The shares were valued at $35.38 per share, and he now holds 212,223 shares directly. The transaction was a tax-withholding disposition, not an open-market sale, and no Rule 10b5-1 trading plan is reported.

Insider Trade Summary

Tax Withholding: 1,026 shares

Tax Withholding 1 txn

Insider Wichterman Troy

Role Chief Financial Officer

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock F1	1,026	$35.38	$36K

Holdings After Transaction: Common Stock — 212,223 shares (Direct)

Holdings Before and After: Common Stock, 213,249 to 212,223 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: 1,026 shares Per-share value for withheld shares: $35.38 per share Post-transaction direct holdings: 212,223 shares +1 more

4 metrics

Shares withheld for tax 1,026 shares Shares withheld by issuer on September 8, 2026 to satisfy tax obligations on RSU release

Per-share value for withheld shares $35.38 per share Value applied to the 1,026 shares withheld for tax withholding obligations

Post-transaction direct holdings 212,223 shares CFO Troy Wichterman’s directly held BLFS common shares after the transaction

Exercise price or tax-liability shares 1,026 shares Total shares in this Form 4 classified as payment of exercise price or tax liability

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 September 8, 2026?

BioLife Solutions reported that CFO Troy Wichterman had 1,026 BLFS shares withheld on September 8, 2026 to cover tax withholding obligations from the release of restricted stock units, at a value of $35.38 per share.

How many BLFS shares does the CFO hold after this Form 4 transaction?

After the tax-withholding disposition, CFO Troy Wichterman directly holds 212,223 shares of BioLife Solutions common stock, as reported in the Form 4 filing.

Was the September 8, 2026 BLFS insider transaction an open-market sale?

No. The filing states that 1,026 shares were withheld by the issuer to satisfy the CFO’s tax withholding obligations on RSU release, which is different from an open-market sale to third-party buyers.

At what price were the withheld BLFS shares valued in the Form 4?

The 1,026 withheld shares were valued at $35.38 per share, according to the Form 4. This value is used to determine the amount applied toward the tax withholding obligation from the restricted stock unit release.

Was the BLFS CFO’s September 2026 transaction made under a Rule 10b5-1 trading plan?

No. The filing’s Rule 10b5-1 checkbox is not selected, and a footnote describes the event as shares withheld to satisfy tax withholding obligations, not as trades under a pre-arranged 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)
09/08/2026

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	09/08/2026		F		1,026(1)	D	$35.38	212,223	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	09/10/2026
	** 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)