144 0002129230 XXXXXXXX LIVE 0000932696 Insight Enterprises, Inc 000-25092 2701 E Insight Way Chandler AZ 85286 480-333-3000 Adatia Karim Officer Common Stock Morgan Stanley Smith Barney

2000 Westchester Ave Purchase NY 10577

568 58720 30203917 05/29/2026 NASDAQ Common 02/20/2023 Restricted Stock Vesting Issuer N 214 02/20/2023 Compensation Common 02/20/2024 Restricted Stock Vesting Issuer N 168 02/20/2024 Compensation Common 02/20/2025 Restricted Stock Vesting Issuer N 186 02/20/2025 Compensation Y 05/29/2026 Lisanne Steinheiser, by Power of Attorney, for Karim Adatia