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Filing Details

Accession Number:: 0001213900-23-076114
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2023-09-12 16:30:15
Reporting Period:: 2023-09-11

Accepted Time:: 2023-09-12 16:30:15
SEC Url:: Form 4 Filing

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1709682	Custom Truck One Source Inc.	CTOS	()	DE

Insiders

Cik	Name	Reported Address	Director	Officer	Large Shareholder	Other
1707921	Ecp Controlco, Llc	40 Beechwood Road Summit NJ 07901	Yes	No	Yes	No
1815147	Ecp Management Gp, Llc	40 Beechwood Road Summit NJ 07901	Yes	No	Yes	No
1815150	Energy Capital Partners Management, Lp	40 Beechwood Road Summit NJ 07901	Yes	No	Yes	No

Reported Non-Derivative Transactions

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Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2023-09-11	41,140	$6.51	0	No	4	S	Indirect	See footnote

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	See footnote

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	25,738,988	Indirect	See footnotes

Footnotes

Represents securities sold by Energy Capital Partners Management, LP, which were acquired as director compensation. No securities reported herein are being sold by NESCO Holdings, LP or ECP Cardinal Holdings, LP.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.49 to $6.55. The reporting persons undertake to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
Represents securities held directly by Energy Capital Partners Management, LP ("ECP Management"). ECP Management GP, LLC is the general partner of ECP Management and may be deemed to share beneficial ownership of the securities held by ECP Management. ECP ControlCo, LLC ("ECP ControlCo") is the sole member of ECP Management GP, LLC. As a result, ECP ControlCo may be deemed to share beneficial ownership of the securities beneficially owned by ECP Management GP, LLC. The managing members of ECP ControlCo are Douglas Kimmelman, Andrew Singer, Peter Labbat, Tyler Reeder and Rahman D'Argenio all of whom collectively share the power to vote and dispose of the securities beneficially owned by ECP ControlCo. Each such individual disclaims beneficial ownership of such shares except to the extent of his pecuniary interest therein.
Includes 21,238,988 shares held by NESCO Holdings, LP and 4,500,000 shares held by ECP Cardinal Holdings, LP ("ECP Cardinal"). The general partner of each of ECP Cardinal and NESCO Holdings, LP is NESCO Holdings GP, LLC. ECP Starlight Guarantor (Public), LP ("ECP Starlight") and Energy Capital Partners III (NESCO Co-Invest), LP are the sole members of NESCO Holdings GP, LLC.
ECP ControlCo is the sole member of Energy Capital Partners III, LLC, which is the general partner of (i) Energy Capital Partners GP III, LP, which is the general partner of each of Energy Capital Partners III, LP, Energy Capital Partners III-A, LP, Energy Capital Partners III-B, LP, Energy Capital Partners III-C, LP, and Energy Capital Partners III-D, LP (together, the "ECP III Funds"), which are the sole members of ECP Starlight Public GP, LLC, which is the general partner of ECP Starlight, and (ii) Energy Capital Partners GP III Co-Investment (NESCO), LLC, which is the general partner of Energy Capital Partners III (NESCO Co-Invest), LP. As a result, each of the foregoing entities may be deemed to share beneficial ownership of the shares of Common Stock held by ECP Cardinal and NESCO Holdings, LP.