Paul M. Jolas Form 4 Filing: RSU Vesting and Tax Withholding Transactions

This Form 4 filing reports equity transactions by Paul M. Jolas, EVP, General Counsel & Secretary of Custom Truck One Source, Inc. (CTOS). The filing details significant restricted stock unit (RSU) activity on April 1, 2026. Jolas received 50,625 shares of common stock through the vesting of three separate RSU grants (16,875 shares each) that were originally granted in 2024, 2025, and 2026. Additionally, he was granted 72,500 new RSUs that vest in four equal annual installments beginning April 1, 2027, subject to continued service and potential acceleration upon achievement of corporate milestones. The filing also reports the sale of 19,923 shares at $6.62 per share to cover tax obligations related to the RSU vesting, resulting in a net increase of 30,702 shares in Jolas's direct ownership position.