AVTR Insider Filing: RSU Tax Withholding of 1,385 Shares at $13.44

Rhea-AI Filing Summary

Form 4 filed for Avantor, Inc. (AVTR) reporting insider Steven W. Eck, SVP & Chief Accounting Officer. The report discloses a 07/31/2025 transaction coded F, described as shares withheld to cover tax withholding on vested RSUs.

• Withheld shares: 1,385
• Price shown: $13.44
• Beneficially owned after transaction: 58,544 shares (Direct)
• Filing signature/date: /s/ Scott Baker, Attorney-in-Fact, 08/04/2025

This is a routine tax-withholding event following RSU vesting; no open-market sale or derivative transactions are reported.

Positive

• Transaction is a tax-withholding on vested RSUs (code F), indicating no open-market sale by the reporting officer
• Reporting person retains beneficial ownership of 58,544 shares following the transaction

Negative

• None.

Insights

Securities Analyst

TL;DR: Routine RSU tax-withholding: 1,385 shares withheld; beneficial ownership remains 58,544 shares.

This Form 4 reports a non-sale transaction (code F) on 07/31/2025 for Steven W. Eck, SVP & Chief Accounting Officer of Avantor (AVTR). The issuer withheld 1,385 shares to satisfy tax obligations arising from RSU vesting. The filing lists a price of $13.44 and shows 58,544 shares beneficially owned post-transaction. No derivative activity or open-market sale is disclosed. Impact to investors is neutral; the change reflects routine compensation settlement rather than a deliberate liquidity event.

Corporate Governance Expert

TL;DR: Governance signal: standard withholding transaction; insider remains a direct holder with material stake disclosed.

The document is a standard Section 16 disclosure: an officer reported RSU vesting with shares withheld for taxes (explained in Remarks). The reporting person is identified with office address and title. The filing is signed by an attorney-in-fact on 08/04/2025. From a governance perspective, this is administrative and does not indicate executive departure, additional compensation beyond scheduled awards, or unusual insider selling. Impact on control or governance is minimal.

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

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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^*

Eck Steven W

(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)
	SVP & Chief Accounting Officer

3. Date of Earliest Transaction (Month/Day/Year)
07/31/2025

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	07/31/2025		F(1)		1,385	D	$13.44	58,544	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	08/04/2025
	** 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

Who filed the Form 4 for Avantor (AVTR)?

The Form 4 was filed for Steven W. Eck, SVP & Chief Accounting Officer of Avantor.

What transaction is reported on the 07/31/2025 Form 4 for AVTR?

A transaction coded F representing 1,385 shares withheld by the issuer to cover tax withholding on vested RSUs.

How many Avantor shares does the reporting person own after the transaction?

The report shows 58,544 shares beneficially owned following the reported transaction.

What price is listed on the Form 4 transaction?

The Form 4 lists a price of $13.44 associated with the reported line item.

When was the Form 4 signed and by whom?

The signature block shows /s/ Scott Baker, as Attorney-in-Fact dated 08/04/2025.