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Custom Truck One Source, Inc. Director's Dealing 2025

Oct 21, 2025

31957_dirs_2025-10-21_f08a71b2-5196-48ec-98a8-1e44f82e2514.zip

Director's Dealing

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SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Custom Truck One Source, Inc. (CTOS)
CIK: 0001709682
Period of Report: 2025-10-17

Reporting Person: EIN MARK (Director)

Non-Derivative Transactions

Date Security Code Shares Price A/D Holdings After Ownership
2025-10-17 Common Stock J 3670279 $0.00 Disposed 0 Indirect

Holdings (Non-Derivative)

Security Shares Ownership
Common Stock 5139319 Direct

Footnotes

F1: Represents a pro-rata distribution in-kind by Capitol Acquisition Management IV, LLC to its members for no consideration (the "Distribution").

F2: Includes shares received in the Distribution.