[Form 4] Avantor, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Gregory L. Summe, a director of Avantor, Inc. (AVTR), reported insider transactions dated 08/21/2025. The Form 4 shows a purchase of 100,000 shares of Avantor common stock at a weighted average price of $12.56 per share and a reported disposition of 58,111 shares. After the purchase, the reporting person discloses beneficial ownership of 200,000 shares held by a trust, with a disclaimer of ownership except for his pecuniary interest. The filing was signed by Scott Baker by power of attorney on 08/22/2025. The filing does not include option or derivative transactions.

Positive

• Reported acquisition of 100,000 shares at a weighted average price of $12.56 on 08/21/2025
• Clear Section 16 disclosure with transaction details and price range explanation

Negative

• Disposition of 58,111 shares reported on the same filing
• Beneficial ownership held by a trust with disclaimer limiting direct ownership clarity

Insights

Corporate Governance Expert

TL;DR: Director reported a sizable open-market purchase and a concurrent disposition, filed by POA.

The Form 4 discloses a 100,000-share acquisition at a weighted average price of $12.56 and a separate disposal of 58,111 shares, with beneficial ownership reported as 200,000 shares held by a trust. The report was executed under power of attorney, which is common for timely filings. The disclosure is specific and complies with Section 16 reporting mechanics; there are no derivative awards or grant events recorded. For governance review, the filing is routine and factual.

Securities Analyst

TL;DR: Insiders bought 100,000 shares at a $12.56 weighted average; transaction is material but routine.

The acquisition of 100,000 shares at a reported weighted average price of $12.56 is a clear open-market purchase. The filing also reports a disposition of 58,111 shares and indicates 200,000 shares beneficially owned via a trust. No options, warrants, or derivatives are listed. These are straightforward Section 16 disclosures and provide direct data points for ownership and recent insider activity without further financial context.

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
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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^*

SUMME GREGORY L

(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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
08/21/2025

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	08/21/2025		P		100,000	A	$12.56(1)	200,000(2)	I	By a Trust
Common Stock								58,111	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. 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.

2. 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.

Remarks:

	/s/ Scott Baker, by power of attorney for Greg Summe	08/22/2025
	** 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 insider transactions did Avantor (AVTR) report on 08/21/2025?

The Form 4 shows a purchase of 100,000 shares at a weighted average price of $12.56 and a disposition of 58,111 shares.

Who filed the Form 4 for AVTR and in what capacity?

The reporting person is Gregory L. Summe, identified as a director; the form was signed by Scott Baker by power of attorney on 08/22/2025.

How many Avantor shares does the reporting person beneficially own after the transactions?

The Form 4 reports 200,000 shares beneficially owned, held by a trust.

Are any derivative securities or options reported in this Form 4?

No. The filing contains no entries in Table II for derivative securities; only common stock transactions are reported.

What price range was used for the reported purchase?

The filing states the purchase occurred in multiple transactions between $12.50 and $12.63, producing the weighted average of $12.56.