INSIGHT ENTERPRISES INC — Director's Dealing 2026

Feb 24, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: INSIGHT ENTERPRISES INC (NSIT)
CIK: 0000932696
Period of Report: 2026-02-20

Reporting Person: Mullen Joyce A (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-02-20	Common Stock	M	3064	—	Acquired	65602	Direct
2026-02-20	Common Stock	F	807	$85.50	Disposed	64795	Direct
2026-02-20	Common Stock	M	4086	—	Acquired	68881	Direct
2026-02-20	Common Stock	F	1689	$85.50	Disposed	67192	Direct
2026-02-20	Common Stock	M	3559	—	Acquired	70751	Direct
2026-02-20	Common Stock	F	974	$85.50	Disposed	69777	Direct
2026-02-20	Common Stock	M	4745	—	Acquired	74522	Direct
2026-02-20	Common Stock	F	1962	$85.50	Disposed	72560	Direct
2026-02-20	Common Stock	M	2260	—	Acquired	74820	Direct
2026-02-20	Common Stock	F	595	$85.50	Disposed	74225	Direct
2026-02-20	Common Stock	M	6025	—	Acquired	80250	Direct
2026-02-20	Common Stock	F	2278	$85.50	Disposed	77972	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-02-20	Restricted Stock Units	$	M	3064	Disposed		Common Stock (3064)	Direct
2026-02-20	Restricted Stock Units	$	M	4086	Disposed		Common Stock (4086)	Direct
2026-02-20	Restricted Stock Units	$	M	3559	Disposed		Common Stock (3559)	Direct
2026-02-20	Restricted Stock Units	$	M	4745	Disposed		Common Stock (4745)	Direct
2026-02-20	Restricted Stock Units	$	M	2260	Disposed		Common Stock (2260)	Direct
2026-02-20	Restricted Stock Units	$	M	6025	Disposed		Common Stock (6025)	Direct

Footnotes

F1: Insight Enterprises, Inc. has withheld the number of whole shares necessary to satisfy the minimum statutory tax withholding obligations. The value of the vested shares (and the taxable income) is calculated based on the closing price on the vesting date or next preceding trading date in the case that the vesting date is a non-trading date.

F2: Each restricted stock unit represents a contingent right to receive one share of Common Stock of Insight Enterprises, Inc.

F3: The number of restricted stock units increases or decreases with the Company's performance against specific objectives defined in advance of the grant date, and the restricted stock units will vest in three equal annual installments beginning February 20, 2024.

F4: The restricted stock units were granted on February 20, 2023 with vesting to occur in three equal annual installments beginning February 20, 2024.

F5: The number of restricted stock units increases or decreases with the Company's performance against specific objectives defined in advance of the grant date, and the restricted stock units will vest in three equal annual installments beginning February 20, 2025.

F6: The restricted stock units were granted on February 20, 2024 with vesting to occur in three equal annual installments beginning February 20, 2025.

F7: The number of restricted stock units increases or decreases with the Company's performance against specific objectives defined in advance of the grant date, and the restricted stock units will vest in three equal annual installments beginning February 20, 2026.

F8: The restricted stock units were granted on February 20, 2025 with vesting to occur in three equal annual installments beginning February 20, 2026.