Avantor SVP has 1,385 shares withheld for taxes

Avantor, Inc. reported that SVP & Chief Accounting Officer Steven W. Eck had 1,385 shares of common stock withheld on July 31, 2026 to cover tax withholding obligations upon the vesting of RSUs, at $13.78 per share.

Accepted by SEC EDGAR 08/04/2026 - 05:09 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Avantor, Inc. reported that SVP & Chief Accounting Officer Steven W. Eck had 1,385 shares of common stock withheld on July 31, 2026 to cover tax withholding obligations upon the vesting of RSUs, at $13.78 per share. After this tax-withholding disposition, he directly holds 129,593 Avantor common shares. The transaction was not made pursuant to a Rule 10b5-1 trading plan.

Insider Trade Summary

Tax Withholding: 1,385 shares

Tax Withholding 1 txn

Insider Eck Steven W

Role SVP & Chief Accounting Officer

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock F1	1,385	$13.78	$19K

Holdings After Transaction: Common Stock — 129,593 shares (Direct)

Holdings Before and After: Common Stock, 130,978 to 129,593 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 taxes: 1,385 shares Tax withholding price per share: $13.78 per share Shares held after transaction: 129,593 shares

3 metrics

Shares withheld for taxes 1,385 shares Common stock withheld on July 31, 2026 for tax obligations

Tax withholding price per share $13.78 per share Value used for tax-withholding disposition of common stock

Shares held after transaction 129,593 shares Direct Avantor common stock holdings after July 31, 2026 disposition

Key Terms

RSUs, tax withholding obligations, withheld, vesting

4 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"

withheld financial

"Represents the number of shares withheld by the Issuer"

vesting financial

"in connection with the vesting of RSUs"

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

FAQ

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

What insider transaction did Avantor (AVTR) report for Steven W. Eck?

Avantor reported that SVP & Chief Accounting Officer Steven W. Eck had 1,385 common shares withheld on July 31, 2026 at $13.78 per share. The shares were withheld by the issuer to cover tax obligations arising from the vesting of RSUs.

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

The transaction was a tax-withholding disposition, not an open-market sale. Shares were withheld by Avantor to satisfy tax withholding obligations related to the vesting of RSUs, as described in the footnote to the Form 4 filing.

How many Avantor (AVTR) shares does Steven W. Eck hold after this transaction?

Following the tax-withholding transaction, Steven W. Eck directly holds 129,593 shares of Avantor common stock. This figure reflects his position after 1,385 shares were withheld by the issuer to cover RSU-related tax obligations on July 31, 2026.

What price was used for the Avantor (AVTR) tax-withholding shares?

The withheld shares were valued at $13.78 per share for the tax-withholding disposition. This per-share amount is reported in the Form 4 for the 1,385 Avantor common shares used to satisfy RSU-related tax obligations on July 31, 2026.

Was Steven W. Eck’s Avantor (AVTR) transaction under a Rule 10b5-1 trading plan?

No. The Form 4 indicates the Rule 10b5-1 checkbox was not marked, so this tax-withholding disposition of 1,385 shares to satisfy RSU vesting taxes was not executed under a pre-arranged Rule 10b5-1 trading plan.

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

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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^*

Eck Steven W

(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)
	SVP & Chief Accounting Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/31/2026

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	07/31/2026		F(1)		1,385	D	$13.78	129,593	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 Steven Eck	08/04/2026
	** 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)