GREGORY L. SUMME - 21 Aug 2025 Form 4 Insider Report for Avantor, Inc. (AVTR)

Role: Director
Signature: /s/ Scott Baker, by power of attorney for Greg Summe
Issuer symbol: AVTR
Transactions as of: 21 Aug 2025
Net transactions value: +$1,256,000
Form type: 4
Filing time: 22 Aug 2025, 16:15:22 UTC
Previous filing: 17 Jul 2025
Next filing: 16 Oct 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
SUMME GREGORY L	Director	RADNOR CORPORATE CENTER, BUILDING ONE, SUITE 200, 100 MATSONFORD ROAD, RADNOR	/s/ Scott Baker, by power of attorney for Greg Summe	22 Aug 2025	0001143422

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AVTR	Common Stock	Purchase	$1,256,000	+100,000	+100%	$12.56	200,000	21 Aug 2025	By a Trust	F1, F2
holding	AVTR	Common Stock						58,111	21 Aug 2025	Direct

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $12.50 to $12.63, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each price within the range set forth above.
F2	By a trust. The reporting person reports beneficial ownership of AVTR common stock held by the trust but disclaims beneficial ownership except to the extent of his pecuniary interest therein.

Content

The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $12.50 to $12.63, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each price within the range set forth above.

By a trust. The reporting person reports beneficial ownership of AVTR common stock held by the trust but disclaims beneficial ownership except to the extent of his pecuniary interest therein.