Trust tied to Avantor (NYSE: AVTR) director buys 100K shares

Rhea-AI Filing Summary

Avantor director Gregory L. Summe, through a trust, reported an open-market purchase of 100,000 shares of common stock on February 12, 2026 at $9.40 per share. After this transaction, the trust held 400,000 shares indirectly attributed to him.

Separately, Summe also reported 58,111 shares of Avantor common stock held directly. The filing notes that he disclaims beneficial ownership of the trust’s shares except to the extent of his economic interest, meaning the trust is the primary holder of that indirect position.

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

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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)
02/12/2026

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	02/12/2026		P		100,000	A	$9.4	400,000(1)	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. 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	02/12/2026
	** 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) disclose for Gregory L. Summe?

Avantor disclosed that a trust linked to director Gregory L. Summe bought 100,000 shares of common stock in an open-market purchase at $9.40 per share. The transaction occurred on February 12, 2026 and increased the trust’s reported indirect holdings to 400,000 shares.

At what price were the Avantor (AVTR) shares purchased in the reported Form 4?

The trust associated with Avantor director Gregory L. Summe purchased the 100,000 Avantor common shares at a price of $9.40 per share. This was reported as an open-market purchase on February 12, 2026, increasing the trust’s indirectly attributed position to 400,000 shares.

How many Avantor (AVTR) shares does the trust linked to Gregory L. Summe now hold?

Following the February 12, 2026 transaction, the trust linked to Gregory L. Summe is reported as holding 400,000 Avantor common shares indirectly. Summe reports beneficial ownership for SEC purposes but disclaims full beneficial ownership beyond his pecuniary interest in the trust’s holdings.

How many Avantor (AVTR) shares does Gregory L. Summe hold directly?

In addition to the trust position, Gregory L. Summe reported direct ownership of 58,111 Avantor common shares. These are held in his own name, separate from the 400,000 shares held indirectly through the trust structure referenced in the same Form 4 filing.

What does the Form 4 footnote say about Summe’s beneficial ownership of Avantor (AVTR) shares?

The footnote explains that the Avantor shares are held by a trust and that Gregory L. Summe reports beneficial ownership for SEC purposes but disclaims beneficial ownership of those shares except to the extent of his pecuniary, or economic, interest in the trust’s holdings.