Custom Truck One Source (CTOS) Proxy filing summary

Executive summary

• Annual Meeting scheduled for June 11, 2026, at 9:00 AM EDT, with virtual participation available.

• Shareholders are encouraged to review proxy materials and vote by June 10, 2026.

Voting matters and shareholder proposals

• Election of three Class A directors to serve until the 2029 annual meeting: Paul Bader, Mark D. Ein, and David Glatt.

• Ratification of Ernst & Young LLP as independent registered public accounting firm for fiscal year ending December 31, 2026.

• Additional business may be transacted as properly brought before the meeting or any adjournments.

Board of directors and corporate governance

• Board recommends voting in favor of all director nominees and auditor ratification.