Avantor, Inc. (AVTR) director adds 350,000 shares and 8,106 RSUs

Rhea-AI Filing Summary

Avantor, Inc. director reported acquiring additional company stock. On December 5, 2025, the insider received 8,106 restricted stock units of Avantor common stock, which vest on May 6, 2026, and are held directly. On the same date, the insider also purchased 350,000 shares of Avantor common stock at a weighted average price of $11.09 per share through a limited liability company, reported as indirectly owned.

The share purchases were executed in multiple trades at prices ranging from $10.98 to $11.21 per share. The reporting person states they will provide full trade-by-trade pricing details upon request and disclaims beneficial ownership of the indirectly held securities except to the extent of any pecuniary interest.

Insider Trade Summary

Net Buyer: 350,000 shares ($3,881,500)

Net Buy 2 txns

Insider MEHRA SANJEEV K

Role Director

Bought 350,000 shs ($3.88M)

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	8,106	$0.00	--
Purchase	Common Stock	350,000	$11.09	$3.88M

Holdings After Transaction: Common Stock — 8,106 shares (Direct); Common Stock — 350,000 shares (Indirect, By limited liability company)

Footnotes (1)

1. Reflects a grant of restricted stock units that vests on May 6, 2026. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $10.98 to $11.21, 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. The Reporting Person disclaims beneficial ownership of the securities reported herein as indirectly beneficially owned, except to the extent of any pecuniary interest therein.

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^*

MEHRA SANJEEV K

(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)
12/05/2025

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	12/05/2025		A(1)		8,106	A	$0	8,106	D
Common Stock	12/05/2025		P		350,000	A	$11.09(2)	350,000	I	By limited liability company(3)

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. Reflects a grant of restricted stock units that vests on May 6, 2026.

2. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $10.98 to $11.21, 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.

3. The Reporting Person disclaims beneficial ownership of the securities reported herein as indirectly beneficially owned, except to the extent of any pecuniary interest therein.

Remarks:

	/s/ Scott Baker, as Attorney-in-Fact	12/09/2025
	** 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 transaction did Avantor (AVTR) report in this Form 4?

The filing shows a director of Avantor, Inc. acquired 8,106 restricted stock units and separately purchased 350,000 shares of Avantor common stock on December 5, 2025.

At what price were the Avantor (AVTR) shares bought in the reported transaction?

The 350,000 Avantor shares were purchased at a weighted average price of $11.09 per share, with individual trades executed between $10.98 and $11.21.

How many Avantor (AVTR) restricted stock units did the director receive and when do they vest?

The director received 8,106 restricted stock units of Avantor common stock, which vest on May 6, 2026.

How is ownership of the Avantor (AVTR) shares classified in the Form 4?

The 8,106 restricted stock units are reported as directly owned, while the 350,000 purchased shares are reported as indirectly owned through a limited liability company.

Does the Avantor (AVTR) insider fully acknowledge beneficial ownership of the indirectly held shares?

The reporting person disclaims beneficial ownership of the securities held through the limited liability company, except to the extent of any pecuniary interest in them.

Can investors obtain detailed pricing for each Avantor (AVTR) trade reported here?

Yes. The insider states they will provide the Issuer, any security holder, or SEC staff with full information on the number of shares purchased at each price within the reported range upon request.