Marshall S. Heinberg - 01 Apr 2022 Form 4 Insider Report for Custom Truck One Source, Inc. (CTOS)

Role: Director
Signature: By: /s/ Adam Haubenreich, Attorney-in-fact
Issuer symbol: CTOS
Transactions as of: 01 Apr 2022
Transactions value $: $0
Form type: 4
Filing time: 05 Apr 2022, 20:15:14 UTC
Previous filing: 01 Mar 2022
Next filing: 03 May 2022
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	CTOS	Common Stock	Options Exercise	$0	+24.5K	+21.34%	$0.00	140K	01 Apr 2022	Direct	F1
holding	CTOS	Common Stock						65K	01 Apr 2022	By Domestic Partner

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	CTOS	Restricted Stock Unit	Options Exercise	$0	-24.5K	-100%	$0.00^*	0	01 Apr 2022	Common Stock	24.5K		Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.
F2	The restricted stock units vested in full on April 1, 2022.