Avantor EVP reports RSU tax share withholdings

Avantor, Inc. executive Brittany Hankamer reported two tax-related share dispositions tied to restricted stock unit vesting.

Rhea-AI Filing Summary

Avantor, Inc. executive Brittany Hankamer reported two tax-related share dispositions tied to restricted stock unit vesting. On February 23, 2026, 1,324 shares of common stock were withheld at $8.89 per share, and on February 24, 2026, 359 shares were withheld at $9.11 per share to satisfy tax withholding obligations. These were coded as Form 4 transaction code F, indicating payment of tax liability by delivering securities rather than open-market sales. After these withholdings, Hankamer directly owned 249,045 shares of Avantor common stock.

Insider Trade Summary

Exercise Price or Tax Liability: 1,683 shares

Exercise Price or Tax Liability 2 txns

Insider Hankamer Brittany

Role EVP, Chief HR Officer

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	359	$9.11	$3K
Exercise Price or Tax Liability	Common Stock	1,324	$8.89	$12K

Holdings After Transaction: Common Stock — 249,045 shares (Direct)

Footnotes (1)

1. F1. Represents the number of shares withheld by the Issuer to cover tax withholding obligations in connection with the vesting of RSUs.

FAQ

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

What insider transactions did Avantor (AVTR) report for Brittany Hankamer?

Brittany Hankamer reported two tax-related share dispositions. Avantor withheld 1,324 shares on February 23, 2026 and 359 shares on February 24, 2026 to cover tax obligations from RSU vesting, using Form 4 code F for tax-withholding dispositions.

Were Avantor (AVTR) EVP Brittany Hankamer’s Form 4 transactions open-market sales?

No, the transactions were not open-market sales. Both were coded F as tax-withholding dispositions, meaning Avantor withheld shares to pay tax obligations tied to restricted stock unit vesting, rather than Hankamer selling shares on the open market.

How many Avantor (AVTR) shares were withheld for Brittany Hankamer’s taxes?

A total of 1,683 shares were withheld for taxes. Avantor withheld 1,324 common shares at $8.89 per share and 359 common shares at $9.11 per share to satisfy RSU-related tax withholding obligations for Brittany Hankamer.

How many Avantor (AVTR) shares does Brittany Hankamer own after these Form 4 transactions?

Brittany Hankamer directly owns 249,045 Avantor shares after the transactions. The Form 4 reports this total ownership following the two tax-withholding dispositions related to vesting restricted stock units, with all reported holdings classified as directly owned common stock.

What does transaction code F mean in the Avantor (AVTR) Form 4 for Brittany Hankamer?

Code F indicates a tax-withholding disposition. It is used when shares are delivered or withheld to pay an exercise price or tax liability, such as RSU vesting, and is different from voluntary open-market purchases or sales by the insider.

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

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Accepted by SEC EDGAR 02/25/2026 - 05:28 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^*

Hankamer Brittany

(Last) (First) (Middle)

RADNOR CORPORATE CENTER, BUILDING ONE,

SUITE 200, 100 MATSONFORD ROAD

(Street)

RADNOR PA 19087

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Avantor, Inc. [ AVTR ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP, Chief HR Officer

3. Date of Earliest Transaction (Month/Day/Year)
02/23/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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	02/23/2026		F(1)		1,324	D	$8.89	249,404	D
Common Stock	02/24/2026		F(1)		359	D	$9.11	249,045	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 cover tax withholding obligations in connection with the vesting of RSUs.

Remarks:

	/s/ Scott Baker, by power of attorney for Brittany Hankamer	02/25/2026
	** 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.