BioLife Solutions exec has 564 shares withheld for taxes

BIOLIFE SOLUTIONS INC reported a small tax-related share withholding for its chief scientific officer tied to RSU vesting, with direct holdings now at 387,269 shares.

Rhea-AI Filing Summary

BIOLIFE SOLUTIONS INC (BLFS) executive Mathew Aby J., EVP & Chief Scientific Officer, had 564 shares of common stock withheld on September 18, 2026 to satisfy tax withholding obligations arising from the release of restricted stock units, at a reference price of $36.69 per share. After this tax-withholding disposition, he holds 387,269 shares of BIOLIFE SOLUTIONS INC common stock directly. No Rule 10b5-1 trading plan is reported for this transaction.

Insider Trade Summary

Tax Withholding: 564 shares

Tax Withholding 1 txn

Insider Mathew Aby J.

Role EVP & Chief Scientific Officer

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock F1	564	$36.69	$21K

Holdings After Transaction: Common Stock — 387,269 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: 564 shares Reference price per share: $36.69 per share Shares held after transaction: 387,269 shares

3 metrics

Shares withheld for taxes 564 shares Withheld on September 18, 2026 to satisfy tax withholding obligations on RSU release

Reference price per share $36.69 per share Price associated with the 564 shares withheld for tax obligations

Shares held after transaction 387,269 shares Direct holdings of BIOLIFE SOLUTIONS INC common stock by Mathew Aby J. 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 executive Mathew Aby J. report?

He reported a tax-withholding disposition on September 18, 2026, where 564 shares of BIOLIFE SOLUTIONS INC common stock were withheld by the company to satisfy his tax withholding obligations from the release of restricted stock units.

How many BLFS shares were involved in the September 18, 2026 transaction?

The transaction involved 564 shares of BIOLIFE SOLUTIONS INC common stock, which were withheld by the issuer to cover the reporting person’s tax withholding obligations associated with restricted stock unit vesting.

What price per share was used for the BLFS tax-withholding shares?

The tax-withholding disposition referenced a price of $36.69 per share for the 564 shares of BIOLIFE SOLUTIONS INC common stock withheld to satisfy the reporting person’s tax obligations on vested restricted stock units.

How many BLFS shares does Mathew Aby J. hold after this Form 4 transaction?

Following the September 18, 2026 tax-withholding transaction, Mathew Aby J. directly holds 387,269 shares of BIOLIFE SOLUTIONS INC common stock, as reported in the Form 4 filing.

Was the BLFS insider transaction made under a Rule 10b5-1 trading plan?

No. The filing indicates that no Rule 10b5-1 trading plan applies to this transaction; the tax-related withholding of 564 shares was to satisfy the reporting person’s tax obligations upon RSU release.

Is the BLFS Form 4 transaction an open-market sale by the executive?

No. The Form 4 describes a payment of tax liability by delivering or withholding securities; 564 shares were withheld by BIOLIFE SOLUTIONS INC to cover taxes from RSU vesting, rather than sold in the open market.

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^*

Mathew Aby J.

(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)
	EVP & Chief Scientific 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		564(1)	D	$36.69	387,269	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/ Aby J. Mathew	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)