Amendment No. 12 to Schedule 13D for Insight Enterprises, Inc.

This Amendment No. 12 to Schedule 13D, filed by ValueAct Capital and related entities, updates their ownership and transactions in the common stock of Insight Enterprises, Inc. As of the filing date, the reporting persons collectively own 1,666,739 shares, representing approximately 5.3% of the outstanding common stock. The amendment includes details of recent transactions, primarily sales of shares, conducted by ValueAct Master Fund between October 10, 2025, and October 28, 2025. The transactions were executed in the open market at varying prices, with the largest sale of 100,000 shares on October 22, 2025, at $109.20 per share. The filing also reaffirms the shared voting and dispositive power over the shares among the reporting entities.