Avantor (NYSE: AVTR) president gains major equity awards and tax share offset

Rhea-AI Filing Summary

Avantor, Inc. president Corey Walker reported new equity awards and a related tax share withholding. On February 19, 2026, he acquired 161,237 shares of common stock as a restricted stock unit grant and 634,617 stock options, both vesting in three equal annual installments beginning on February 19, 2027.

On February 20, 2026, 4,963 common shares were disposed of through a tax-withholding transaction at $9.03 per share, with shares withheld by the issuer to cover RSU tax obligations, not an open-market sale. After these transactions, Walker directly held 387,545 common shares.

Insider Trade Summary

3 transactions reported

Mixed 3 txns

Insider Walker Corey

Role President, VWR Dist. & Servs.

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	4,963	$9.03	$45K
Grant/Award	Stock Options (Right to Buy)	634,617	$0.00	--
Grant/Award	Common Stock	161,237	$0.00	--

Holdings After Transaction: Common Stock — 387,545 shares (Direct); Stock Options (Right to Buy) — 634,617 shares (Direct)

Footnotes (1)

1. Reflects a grant of restricted stock units that vest in three equal annual installments beginning on February 19, 2027. Represents the number of shares withheld by the Issuer to cover tax withholding obligations in connection with the vesting of RSUs. Reflects a grant of stock options that vest in three equal annual installments beginning on February 19, 2027.

Form 4 Insider Transactions: What Each Field Means →

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
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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^*

Walker Corey

(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)
	President, VWR Dist. & Servs.

3. Date of Earliest Transaction (Month/Day/Year)
02/19/2026

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	02/19/2026		A(1)		161,237	A	$0	392,508	D
Common Stock	02/20/2026		F(2)		4,963	D	$9.03	387,545	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
Stock Options (Right to Buy)	$11.05	02/19/2026		A		634,617		(3)	02/19/2036	Common Stock	634,617	$0	634,617	D

Explanation of Responses:

1. Reflects a grant of restricted stock units that vest in three equal annual installments beginning on February 19, 2027.

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

3. Reflects a grant of stock options that vest in three equal annual installments beginning on February 19, 2027.

Remarks:

	/s/ Scott Baker, by power of attorney for Corey Walker	02/23/2026
	** 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.

FAQ

What equity awards did Avantor (AVTR) executive Corey Walker receive?

Corey Walker received a grant of 161,237 Avantor common shares as restricted stock units and 634,617 stock options. Both awards vest in three equal annual installments starting on February 19, 2027, aligning compensation with multi-year performance.

How do Corey Walker’s new Avantor RSUs vest and over what period?

The Avantor RSU grant to Corey Walker of 161,237 shares vests in three equal annual installments. Vesting begins on February 19, 2027, meaning the award is spread over three years to encourage longer-term retention and alignment.

What are the terms of Corey Walker’s newly granted Avantor stock options?

Corey Walker was granted 634,617 Avantor stock options at an exercise price of $0.00 per option in the filing. These options vest in three equal annual installments beginning on February 19, 2027, providing long-term equity-based incentive compensation.

Why did Corey Walker dispose of Avantor shares on February 20, 2026?

The disposal of 4,963 Avantor common shares on February 20, 2026 was a tax-withholding transaction. Shares were withheld by the issuer at $9.03 per share to satisfy tax obligations from RSU vesting, not an open-market sale.

How many Avantor shares does Corey Walker own after these Form 4 transactions?

Following the reported transactions, Corey Walker directly owns 387,545 shares of Avantor common stock. This figure reflects his position after the RSU-related tax-withholding disposal and the reported equity award activity in the Form 4 filing.

Are Corey Walker’s Avantor share disposals considered market sales?

No, the 4,963 Avantor shares reported as disposed of were withheld by the issuer to cover RSU tax obligations. The filing characterizes this as a tax-withholding disposition, not a discretionary or open-market share sale by the executive.