Statement of Changes in Beneficial Ownership (Form 4)

FORM 4 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 that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES 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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1. Name and Address of Reporting Person * LOY BERTRAND 2. Issuer Name and Ticker or Trading Symbol ENTEGRIS INC [ENTG] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Executive Chair (Last) (First) (Middle) C/O ENTEGRIS, INC., 129 CONCORD ROAD 3. Date of Earliest Transaction (Month/Day/Year) 02/02/2026 (Street) BILLERICA, MA 01821 4. If Amendment, Date 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 (City) (State) (Zip) 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 02/02/2026 M 65,250 A $55.72 371,672(1) D Common Stock 02/02/2026 S 200(2) D $115.96(3) 371,472 D Common Stock 02/02/2026 S 2,412(2) D $117.19(4) 369,060 D Common Stock 02/02/2026 S 9,292(2) D $118.43(5) 359,768 D Common Stock 02/02/2026 S 16,424(2) D $119.13(6) 343,344 D Common Stock 02/02/2026 S 34,522(2) D $120.25(7) 308,822 D Common Stock 02/02/2026 S 2,400(2) D $120.91(8) 306,422 D

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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 Underlying Securities (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 of Derivative Security: 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

Employee Stock Option (Right to Buy)

$55.72

02/02/2026

M

65,250

(9)

02/19/2027

Common Stock

65,250

(10)

0

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
LOY BERTRAND C/O ENTEGRIS, INC. 129 CONCORD ROAD BILLERICA, MA 01821	X		Executive Chair

Signatures

/s/ Joseph Colella, Attorney-In-Fact for Bertrand Loy		02/04/2026
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	This amount reflects an additional 602 shares to correct an error in the number of shares initially withheld to satisfy tax obligations in connection with the award of shares reported on the Reporting Person's Form 4 filed on February 24, 2025.
(2)	These shares were sold pursuant to a Rule 10b5-1 Trading Plan established by the Reporting Person on February 10, 2025.
(3)	The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $115.50 to $116.42, inclusive. The reporting person undertakes to provide Entegris, Inc., any shareholder of Entegris, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
(4)	The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $116.60 to $117.58, inclusive. The reporting person undertakes to provide Entegris, Inc., any shareholder of Entegris, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
(5)	The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $117.67 to $118.66, inclusive. The reporting person undertakes to provide Entegris, Inc., any shareholder of Entegris, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
(6)	The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $118.68 to $119.66, inclusive. The reporting person undertakes to provide Entegris, Inc., any shareholder of Entegris, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
(7)	The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $119.73 to $120.72, inclusive. The reporting person undertakes to provide Entegris, Inc., any shareholder of Entegris, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
(8)	The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $120.73 to $121.21, inclusive. The reporting person undertakes to provide Entegris, Inc., any shareholder of Entegris, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
(9)	This option is fully vested.
(10)	Awarded pursuant to the Entegris, Inc. 2010 Stock Plan in consideration of services as an employee.
Remarks: The stock option, which was exercised by the Reporting Person pursuant to a Rule 10b5-1 Trading Plan, was set to expire on February 19, 2027.

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