Olivier Blachier - 14 Aug 2026 Form 4 Insider Report for ENTEGRIS INC (ENTG)

Reporting relationship: President, Materials Solutions
Issuer ticker: ENTG
Reported as of: 14 Aug 2026
Net transaction value: -$321,320
SEC form: 4
Accepted by SEC: 17 Aug 2026, 12:00:40 UTC
Prior SEC filing: 18 May 2026
Source filing: View source filing
Reporting owner signature: /s/ Joseph Colella, Attorney-In-Fact for Olivier Blachier

Key filing fact

Olivier Blachier filed Form 4 for ENTEGRIS INC (ENTG) on 17 Aug 2026.

Key facts

This page summarizes Olivier Blachier's Form 4 filing for ENTEGRIS INC (ENTG).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 17 Aug 2026, 12:00.

Change

Previous filing in this sequence was filed on 18 May 2026.
Current net transaction value: -$321,320.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001891661 Primary reporting owner

Blachier Olivier

Relationship: President, Materials Solutions
Address: C/O ENTEGRIS, INC., 129 CONCORD ROAD, BILLERICA
Signature: /s/ Joseph Colella, Attorney-In-Fact for Olivier Blachier
Signature date: 17 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ENTG transaction

Common Stock

Options Exercise

Transaction value
Shares: +2,000
Change %: +5.7%
Price: $80.71^*
Shares after: 36,997
Date: 14 Aug 2026
Ownership: Direct
Footnotes: F1

ENTG transaction

Common Stock

Sale

Transaction value: $321,320
Shares: -2,000
Change %: -5.4%
Price: $160.66
Shares after: 34,997
Date: 14 Aug 2026
Ownership: Direct
Footnotes: F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

ENTG transaction Derivative

Employee Stock Option (Right to Buy)

Options Exercise

Transaction value
Shares: -2,000
Change %: -33%
Price: $0.000000^*
Shares after: 3,972
Date: 14 Aug 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 2,000
Exercise price: $80.71
Footnotes: F3, F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 4 footnotes

Footnote F1

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

Footnote F2

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

Footnote 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.

Footnote F4

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