ENTEGRIS INC — Director's Dealing 2021

May 5, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ENTEGRIS INC (ENTG)
CIK: 0001101302
Period of Report: 2021-05-03

Reporting Person: Edlund Todd James (EVP & COO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-05-03	Common Stock	M	10164	$21.60	Acquired	178340	Direct
2021-05-03	Common Stock	M	29088	$31.10	Acquired	207428	Direct
2021-05-03	Common Stock	S	29453	$111.5167	Disposed	177975	Direct
2021-05-03	Common Stock	S	5894	$112.6991	Disposed	172081	Direct
2021-05-03	Common Stock	S	2305	$113.288	Disposed	169776	Direct
2021-05-03	Common Stock	S	1600	$114.2659	Disposed	168176	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-05-03	Employee Stock Option (Right to Buy)	$21.6	M	10164	Disposed	2024-02-19	Common Stock (10164.0)	Direct
2021-05-03	Employee Stock Option (Right to Buy)	$31.1	M	29088	Disposed	2025-02-19	Common Stock (29088.0)	Direct

Footnotes

F1: These shares were sold pursuant to a Rule 10b5-1 Trading Plan established by the Reporting Person on March 3, 2021.

F2: The price reported in column 4 is a weighted average price reported in reliance on a letter from the Office of Chief Counsel, Securities and Exchange Commission's Division of Corporate Finance to the Society of Corporate Governance Professionals dated June 25, 2008. These shares were sold in multiple transactions at prices ranging from $111.11 to $112.10, 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.

F3: The price reported in column 4 is a weighted average price reported in reliance on a letter from the Office of Chief Counsel, Securities and Exchange Commission's Division of Corporate Finance to the Society of Corporate Governance Professionals dated June 25, 2008. These shares were sold in multiple transactions at prices ranging from $112.11 to $113.08, 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.

F4: The price reported in column 4 is a weighted average price reported in reliance on a letter from the Office of Chief Counsel, Securities and Exchange Commission's Division of Corporate Finance to the Society of Corporate Governance Professionals dated June 25, 2008. These shares were sold in multiple transactions at prices ranging from $113.13 to $113.47, 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.

F5: The price reported in column 4 is a weighted average price reported in reliance on a letter from the Office of Chief Counsel, Securities and Exchange Commission's Division of Corporate Finance to the Society of Corporate Governance Professionals dated June 25, 2008. These shares were sold in multiple transactions at prices ranging from $114.145 to $114.35, 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.

F6: This option is fully vested.

F7: This option vests in four equal installments. The first three installments became exercisable on February 19, 2019, February 19, 2020 and February 19, 2021, respectively. The last installment becomes exercisable on February 19, 2022.