Avantor HR chief has 181 shares withheld for tax

Avantor, Inc. (AVTR) reported an insider equity transaction by EVP, Chief HR Officer Brittany Hankamer.

Rhea-AI Filing Summary

Avantor, Inc. (AVTR) reported an insider equity transaction by EVP, Chief HR Officer Brittany Hankamer. On August 14, 2026, 181 shares of common stock were disposed of to cover tax withholding obligations in connection with the vesting of RSUs, at a price of $13.66 per share. Following this withholding transaction, Hankamer directly held 248,864 shares of Avantor common stock.

Insider Trade Summary

Tax Withholding: 181 shares

Tax Withholding 1 txn

Insider Hankamer Brittany

Role EVP, Chief HR Officer

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock F1	181	$13.66	$2K

Holdings After Transaction: Common Stock — 248,864 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.

Key Figures

Shares withheld for tax: 181 shares Withholding price per share: $13.66 per share Shares held after transaction: 248,864 shares

3 metrics

Shares withheld for tax 181 shares Common stock withheld on August 14, 2026 to cover tax withholding obligations on RSU vesting

Withholding price per share $13.66 per share Valuation applied to the 181 shares withheld in the code F transaction

Shares held after transaction 248,864 shares Directly held Avantor common stock by Brittany Hankamer following the August 14, 2026 transaction

Key Terms

RSUs, tax withholding obligations, code F

3 terms

RSUs financial

"in connection with the vesting of RSUs."

RSUs, or restricted stock units, are a form of company shares given to employees as part of their compensation. They are typically awarded with certain restrictions, such as a waiting period before they can be fully owned or sold, similar to earning a gift that becomes fully yours over time. For investors, RSUs can impact a company's stock offerings and reflect how much the company relies on stock-based incentives to attract and retain talent.

tax withholding obligations financial

"to cover tax withholding obligations in connection with the vesting"

code F regulatory

"The Form 4 does not report any derivative or option exercises. It only shows a code F transaction"

FAQ

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

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

Avantor reported that EVP, Chief HR Officer Brittany Hankamer had 181 shares of common stock withheld on August 14, 2026 to satisfy tax withholding obligations related to vesting RSUs, leaving her with 248,864 directly held shares.

Was the Avantor (AVTR) insider transaction a market sale or tax withholding?

The Avantor insider transaction was tax withholding, not an open-market sale. 181 shares of common stock were withheld by Avantor to cover tax obligations arising from the vesting of RSUs held by EVP, Chief HR Officer Brittany Hankamer.

How many Avantor (AVTR) shares does Brittany Hankamer hold after this Form 4?

After the reported transaction, Brittany Hankamer directly holds 248,864 Avantor common shares. The only reported change was the withholding of 181 shares by Avantor to satisfy tax liabilities linked to restricted stock unit vesting.

At what price were the Avantor (AVTR) shares withheld in the Form 4 filing?

The withheld Avantor shares are reported at $13.66 per share. This price is used to value the 181 shares of common stock withheld by the company to cover Brittany Hankamer’s tax withholding obligations on vesting RSUs.

Does the Avantor (AVTR) Form 4 indicate any derivative or option exercises?

The Form 4 does not report any derivative or option exercises. It only shows a code F transaction where 181 shares of common stock were withheld to cover tax withholding obligations from the vesting of restricted stock units held by Brittany Hankamer.

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

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Available on EDGAR 08/18/2026 - 04:12 PM Accepted by SEC EDGAR 08/18/2026 - 04:12 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 PENNSYLVANIA 19087

(City) (State) (Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/14/2026

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	08/14/2026		F(1)		181	D	$13.66	248,864	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	08/18/2026
	** 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)