[Form 4] Avantor, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Avantor (AVTR) reported insider equity awards for its EVP, Chief Operating Officer. On November 10, 2025, the officer received 17,391 restricted stock units at $0 and 47,058 stock options with a $11.5 exercise price, expiring November 10, 2035.

Both the RSUs and options vest in two equal annual installments beginning on November 10, 2026. Following these awards, the officer directly beneficially owned 17,391 shares and 47,058 derivative securities.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Blenn Mary

Role EVP, Chief Operating Officer

Type	Security	Shares	Price	Value
Grant/Award	Stock Options (Right to Buy)	47,058	$0.00	--
Grant/Award	Common Stock	17,391	$0.00	--

Holdings After Transaction: Stock Options (Right to Buy) — 47,058 shares (Direct); Common Stock — 17,391 shares (Direct)

Footnotes (1)

1. Reflects a grant of restricted stock units that vest in two equal annual installments beginning on November 10, 2026. Reflects a grant of stock options that vest in two equal annual installments beginning on November 10, 2026.

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
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^*

Blenn Mary

(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)
	EVP, Chief Operating Officer

3. Date of Earliest Transaction (Month/Day/Year)
11/10/2025

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	11/10/2025		A(1)		17,391	A	$0	17,391	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)	$11.5	11/10/2025		A		47,058		(2)	11/10/2035	Common Stock	47,058	$0	47,058	D

Explanation of Responses:

1. Reflects a grant of restricted stock units that vest in two equal annual installments beginning on November 10, 2026.

2. Reflects a grant of stock options that vest in two equal annual installments beginning on November 10, 2026.

Remarks:

	/s/ Scott Baker, as Attorney-in-Fact	11/12/2025
	** 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

What did Avantor (AVTR) disclose in this Form 4?

An equity grant to the EVP, Chief Operating Officer: 17,391 RSUs at $0 and 47,058 stock options with a $11.5 exercise price, granted on November 10, 2025.

How many RSUs were granted to AVTR’s COO and how do they vest?

The grant was 17,391 RSUs, vesting in two equal annual installments beginning on November 10, 2026.

What are the details of the stock options reported by AVTR?

47,058 options with a $11.5 exercise price, vesting in two equal annual installments starting November 10, 2026, and expiring November 10, 2035.

What is the officer’s beneficial ownership after the transactions?

Direct beneficial ownership is 17,391 shares of common stock and 47,058 derivative securities (stock options).

Who is the reporting person’s role at Avantor (AVTR)?

The reporting person is an Officer: EVP, Chief Operating Officer.

Was a Rule 10b5-1(c) trading plan indicated?

The form includes a checkbox reference to Rule 10b5-1(c), but the content provided does not indicate it was checked.