Avantor, Inc. — Director's Dealing 2025

Feb 24, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Avantor, Inc. (AVTR)
CIK: 0001722482
Period of Report: 2025-02-20

Reporting Person: Stubblefield Michael (Director, President & CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-02-20	Common Stock	A	157232	—	Acquired	1474465	Direct
2025-02-23	Common Stock	F	14674	$17.30	Disposed	1459791	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-02-20	Stock Options (Right to Buy)	$17.49	A	380886	Acquired	2035-02-20	Common Stock (380886)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	58908	Indirect
Common Stock	469500	Indirect

Footnotes

F1: Reflects a grant of restricted stock units that vest in three equal annual installments beginning on February 20, 2026.

F2: Reflects a transfer by the Reporting Person of 41,092 shares from a Grantor Retained Annuity Trust to the Reporting Person on August 9, 2024 and a transfer by the Reporting Person of 56,588 shares from a Grantor Retained Annuity Trust to the Reporting Person on December 20, 2024. These transfers are exempt from Section 16 pursuant to Rule 16a-13.

F3: Reflects securities held by a trust for the benefit of the Reporting Person's family, of which the spouse of the Reporting Person is the trustee. The Reporting Person disclaims beneficial ownership of the securities held by the trust, except to the extent of his pecuniary interest therein.

F4: Represents the number of shares withheld by the Issuer to cover tax withholding obligations in connection with the vesting of RSUs.

F5: Reflects a grant of stock options that vest in three equal installments beginning on February 20, 2026.