Custom Truck One Source, Inc. — Director's Dealing 2023

May 16, 2023

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Custom Truck One Source, Inc. (CTOS)
CIK: 0001709682
Period of Report: 2023-05-12

Reporting Person: Heinberg Marshall (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2023-05-12	Common Stock	P	19689	$6.4157	Acquired	204993	Direct
2023-05-15	Common Stock	P	311	$6.4838	Acquired	205304	Direct
2023-05-15	Common Stock	P	20000	$6.5323	Acquired	105000	Indirect

Footnotes

F1: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $6.35 to $6.51, inclusive. The reporting person undertakes to provide to the Company, any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnotes (1), (2) and (3) to this Form.

F2: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $6.47 to $6.50, inclusive.

F3: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $6.46 to $6.58, inclusive.