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Filing Details

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
1634372	Platinum Equity Investment Holdings, Llc	C/O Platinum Equity Advisors, Llc 360 North Crescent Drive, South Building Beverly Hills CA 90210	No	No	Yes	No
1756330	Platinum Equity Investment Holdings Ic (Cayman), Llc	C/O Platinum Equity Advisors, Llc 360 North Crescent Drive, South Building Beverly Hills CA 90210	No	No	Yes	No
1756331	Platinum Equity Investco, L.p.	C/O Platinum Equity Advisors, Llc 360 North Crescent Drive, South Building Beverly Hills CA 90210	No	No	Yes	No
1766567	Platinum Investco (Cayman), Llc	C/O Platinum Equity Advisors, Llc 360 North Crescent Drive, South Building Beverly Hills CA 90210	No	No	Yes	No
1854827	Platinum Equity Partners V, Llc	C/O Platinum Equity Advisors, Llc 360 North Crescent Drive, South Building Beverly Hills CA 90210	No	No	Yes	No
1854932	Platinum Equity Investment Holdings V, Llc	C/O Platinum Equity Advisors, Llc 360 North Crescent Drive, South Building Beverly Hills CA 90210	No	No	Yes	No
1854950	Platinum Equity Partners V, L.p.	C/O Platinum Equity Advisors, Llc 360 North Crescent Drive, South Building Beverly Hills CA 90210	No	No	Yes	No
1854967	Platinum Equity Investment Holdings V Manager, Llc	C/O Platinum Equity Advisors, Llc 360 North Crescent Drive, South Building Beverly Hills CA 90210	No	No	Yes	No
1855018	Pe One Source Holdings, Llc	C/O Platinum Equity Advisors, Llc 360 North Crescent Drive, South Building Beverly Hills CA 90210	No	No	Yes	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2025-01-30	8,143,635	$4.00	156,743,635	No	4	P	Indirect	See Footnotes

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	P	Indirect	See Footnotes

Footnotes

PE One Source Holdings, LLC ("PE One Source") is the record holder of the securities reported herein. Tom Gores is the manager of Platinum Equity, LLC, which is the sole member of Platinum Equity Investment Holdings, LLC, which is the sole member of Platinum Equity Investment Holdings IC (Cayman), LLC, which is the general partner of Platinum Equity InvestCo, L.P., which is the sole member of Platinum Equity Investment Holdings V, LLC, which is the sole member of Platinum Equity Partners V, LLC, which is the general partner of Platinum Equity Partners V, L.P., which is the general partner of Platinum Equity Capital Partners V, L.P., which holds a majority of the outstanding equity of PE One Source.
Additionally, Platinum Equity, LLC is also the sole member of Platinum Equity Investment Holdings V Manager, LLC, which is the sole manager of Platinum Equity Investment Holdings V, LLC. Platinum Equity, LLC and Tom Gores together hold a controlling interest in Platinum InvestCo (Cayman), LLC, which holds a controlling interest in Platinum Equity InvestCo, L.P. By virtue of these relationships, each of these entities and Mr. Gores may be deemed to share beneficial ownership of the securities held of record by PE One Source. Each of these entities and Mr. Gores disclaim any such beneficial ownership except to the extent of their pecuniary interests therein.