AVTR Insider Filing: HR EVP Withholds 181 Shares to Cover RSU Taxes

Rhea-AI Filing Summary

Insider transaction disclosure for Avantor, Inc. (AVTR). Brittany Hankamer, EVP and Chief HR Officer, reported a withholding transaction on 08/14/2025 related to vested restricted stock units. The form shows 181 shares were withheld by the issuer to satisfy tax withholding at an effective price of $12.98 per share. After the withholding, Ms. Hankamer beneficially owned 171,563 shares, held directly. The Form 4 was signed on behalf of the reporting person by an attorney-in-fact on 08/15/2025.

Insights

Securities Analyst

TL;DR: Routine tax-withholding on vested RSUs; no sale for cash proceeds, ownership remains substantial.

The filing documents a standard issuer withholding of 181 shares to cover tax obligations from RSU vesting at a per-share valuation of $12.98. This is an administrative disposition rather than a market sale, and the reporting person retains a sizable direct stake of 171,563 shares. For investors, this transaction does not indicate intentional liquidity-taking or a change in ownership control; it simply reflects tax settlement mechanics.

Corporate Governance Expert

TL;DR: Administrative share withholding on RSU vesting consistent with typical equity compensation practices.

The Form 4 shows the reporting person, who is an executive officer, had shares withheld to satisfy tax withholdings upon RSU vesting. The disclosure is concise and complete for this type of event: it lists the number withheld, the deemed price, and the resulting beneficial ownership. There are no additional derivative transactions or joint filings noted.

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

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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)
08/14/2025

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	08/14/2025		F(1)		181	D	$12.98	171,563	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, as Attorney-in-Fact	08/15/2025
	** 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.

FAQ

What transaction did Brittany Hankamer report on the Form 4 for AVTR?

The Form 4 reports an issuer tax-withholding transaction where 181 shares were withheld in connection with RSU vesting on 08/14/2025.

How many AVTR shares does the reporting person beneficially own after the transaction?

After the withholding, the reporting person beneficially owned 171,563 shares held directly.

What price is listed for the withheld shares on the Form 4?

The Form 4 lists a price of $12.98 per share for the withheld shares.

What is the reporting person's role at Avantor (AVTR)?

The reporting person is listed as EVP, Chief HR Officer.

When was the Form 4 filed/signed for this transaction?

The signature block shows the filing was signed by an attorney-in-fact on 08/15/2025.