Entegris (ENTG) president trades 2,000 shares under 10b5-1 plan

Rhea-AI Filing Summary

ENTEGRIS INC (ENTG) executive Olivier Blachier, President, Materials Solutions, exercised employee stock options for 2,000 shares of common stock at a conversion price of $80.71 per share and sold 2,000 shares at $160.66 per share. The option exercise reduced derivative holdings, leaving 3,972 options outstanding, and the sale was executed under a Rule 10b5-1 Trading Plan.

Insider Trade Summary 10b5-1

Exercise and Sale: 2,000 shares ($160K approx. pre-tax spread)

Exercise and Sale 3 txns

Insider Blachier Olivier

Role President, Materials Solutions

Sold 2,000 shs ($321K)

Approx. gross sale proceeds $321K

Approx. exercise cost $161K

Approx. pre-tax spread $160K

Type	Security	Shares	Price	Value
Exercise	Employee Stock Option (Right to Buy) F4, F3	2,000	$0.00	$0.00
Exercise	Common Stock F1	2,000	$80.71	$161K
Sale	Common Stock F2	2,000	$160.66	$321K

Holdings After Transaction: Employee Stock Option (Right to Buy) — 3,972 shares (Direct); Common Stock — 34,996.76 shares (Direct)

Footnotes (4)

1. F1. These shares include 99.81 shares acquired by the Reporting Person under the Entegris, Inc. Employee Stock Purchase Plan on June 30, 2026.
2. F2. These shares were sold pursuant to a Rule 10b5-1 Trading Plan established by the Reporting Person on May 14, 2026.
3. F3. This option vests in four equal annual installments. The first three installments became exercisable on February 19, 2024, February 19, 2025, and February 19, 2026, respectively. The final installment will become exercisable on February 19, 2027.
4. F4. Awarded pursuant to the Entegris, Inc. 2020 Stock Plan in consideration of services as an employee.

Key Figures

Options Exercised: 2,000 shares Option Exercise Price: $80.71 per share Shares Sold: 2,000 shares +4 more

7 metrics

Options Exercised 2,000 shares Employee stock options converted into common stock on 2026-08-14

Option Exercise Price $80.71 per share Conversion price of employee stock option exercised for 2,000 shares

Shares Sold 2,000 shares Common stock sale on 2026-08-14

Sale Price $160.66 per share Price for 2,000 ENTG shares sold on 2026-08-14

Remaining Options 3,972 options Employee stock options remaining after the reported exercise

Option Expiration 2030-02-19 Expiration date of the employee stock option series involved

ESPP Shares 99.81 shares Shares acquired under the Entegris Employee Stock Purchase Plan on June 30, 2026

Key Terms

Rule 10b5-1 Trading Plan, Employee Stock Option, Entegris, Inc. 2020 Stock Plan, Employee Stock Purchase Plan

4 terms

Rule 10b5-1 Trading Plan regulatory

"These shares were sold pursuant to a Rule 10b5-1 Trading Plan"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

Employee Stock Option financial

"security_title: Employee Stock Option (Right to Buy)"

An employee stock option is a promise that lets a worker buy company shares later at a predetermined price, often after they stay for a certain period or meet performance goals — think of it like a coupon that locks in today's price for a future purchase. It matters to investors because options align employees’ incentives with company performance, can increase the number of shares outstanding (dilution) when exercised, and represent a compensation cost that affects reported profits and shareholder value.

Entegris, Inc. 2020 Stock Plan financial

"Awarded pursuant to the Entegris, Inc. 2020 Stock Plan"

Employee Stock Purchase Plan financial

"acquired by the Reporting Person under the Entegris, Inc. Employee Stock Purchase Plan"

An employee stock purchase plan is a company program that lets workers buy shares through small payroll deductions, often at a discount to the market price and after a set offering period. Think of it like a workplace savings plan that turns into ownership: it encourages employees to share in the company’s success and can create predictable buying or selling of stock that investors watch because it affects supply, demand and employee incentives.

FAQ

What did ENTG executive Olivier Blachier report on this Form 4?

Olivier Blachier reported exercising 2,000 stock options at $80.71 and selling 2,000 Entegris (ENTG) shares at $160.66 per share, in conjunction with an existing equity award.

At what prices were the Entegris (ENTG) transactions executed on this Form 4?

The option was exercised at a conversion price of $80.71 per share, and the resulting 2,000 ENTG shares were sold at $160.66 per share in a separate transaction reported the same day.

Were Olivier Blachier’s ENTG share sales under a Rule 10b5-1 plan?

Yes. The Form 4 notes the 2,000-share sale was made under a Rule 10b5-1 Trading Plan established on May 14, 2026, indicating the trade was pre-arranged rather than opportunistic.

How many Entegris (ENTG) options does Olivier Blachier still hold after these transactions?

After exercising 2,000 options, Blachier holds 3,972 employee stock options expiring on February 19, 2030, according to the post-transaction derivative holdings reported in the Form 4.

What is the vesting schedule of the Entegris (ENTG) options involved in this Form 4?

The option vests in four equal annual installments. The first three became exercisable on February 19, 2024, 2025, and 2026, with the final installment scheduled to become exercisable on February 19, 2027.

Did the Form 4 mention Entegris (ENTG) Employee Stock Purchase Plan shares?

Yes. A footnote states that reported common stock holdings include 99.81 shares acquired under the Entegris, Inc. Employee Stock Purchase Plan on June 30, 2026, as part of Blachier’s overall position.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/17/2026 - 12:01 PM Accepted by SEC EDGAR 08/17/2026 - 12:00 PM Learn about SEC filing dates

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).

X

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^*

Blachier Olivier

(Last) (First) (Middle)

C/O ENTEGRIS, INC.

129 CONCORD ROAD

(Street)

BILLERICA MASSACHUSETTS 01821

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
ENTEGRIS INC [ ENTG ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President, Materials Solutions

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/14/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	08/14/2026		M		2,000	A	$80.71	36,996.76(1)	D
Common Stock	08/14/2026		S		2,000(2)	D	$160.66	34,996.76	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
Employee Stock Option (Right to Buy)	$80.71	08/14/2026		M			2,000	(3)	02/19/2030	Common Stock	2,000	$0(4)	3,972	D

Explanation of Responses:

1. These shares include 99.81 shares acquired by the Reporting Person under the Entegris, Inc. Employee Stock Purchase Plan on June 30, 2026.

2. These shares were sold pursuant to a Rule 10b5-1 Trading Plan established by the Reporting Person on May 14, 2026.

3. This option vests in four equal annual installments. The first three installments became exercisable on February 19, 2024, February 19, 2025, and February 19, 2026, respectively. The final installment will become exercisable on February 19, 2027.

4. Awarded pursuant to the Entegris, Inc. 2020 Stock Plan in consideration of services as an employee.

Remarks:

	/s/ Joseph Colella, Attorney-In-Fact for Olivier Blachier	08/17/2026
	** 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.
* Form 4: SEC 1474 (03-26)