1. Name and Address of Reporting Person*PE One Source Holdings, LLC | C/O PLATINUM EQUITY ADVISORS, LLC | 360 NORTH CRESCENT DRIVE, SOUTH BUILDING | (Street) | 2. Issuer Name and Ticker or Trading Symbol Custom Truck One Source, Inc. [ CTOS ] | 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) | Director | X | 10% Owner | | Officer (give title below) | | Other (specify below) | | |
3. Date of Earliest Transaction (Month/Day/Year) 04/01/2021 |
4. If Amendment, Date of Original Filed (Month/Day/Year) | 6. Individual or Joint/Group Filing (Check Applicable Line) | Form filed by One Reporting Person | X | Form filed by More than One Reporting Person | |
1. Name and Address of Reporting Person*PE One Source Holdings, LLC | C/O PLATINUM EQUITY ADVISORS, LLC | 360 NORTH CRESCENT DRIVE, SOUTH BUILDING | (Street) |
1. Name and Address of Reporting Person*Platinum Equity Capital Partners V, L.P. | C/O PLATINUM EQUITY ADVISORS, LLC | 360 NORTH CRESCENT DRIVE, SOUTH BUILDING | (Street) |
1. Name and Address of Reporting Person*Platinum Equity Partners V, L.P. | C/O PLATINUM EQUITY ADVISORS, LLC | 360 NORTH CRESCENT DRIVE, SOUTH BUILDING | (Street) |
1. Name and Address of Reporting Person*Platinum Equity Partners V, LLC | C/O PLATINUM EQUITY ADVISORS, LLC | 360 NORTH CRESCENT DRIVE, SOUTH BUILDING | (Street) |
1. Name and Address of Reporting Person*Platinum Equity Investment Holdings V, LLC | C/O PLATINUM EQUITY ADVISORS, LLC | 360 NORTH CRESCENT DRIVE, SOUTH BUILDING | (Street) |
1. Name and Address of Reporting Person*Platinum Equity Investment Holdings V Manager, LLC | C/O PLATINUM EQUITY ADVISORS, LLC | 360 NORTH CRESCENT DRIVE, SOUTH BUILDING | (Street) |
1. Name and Address of Reporting Person*Platinum Equity InvestCo, L.P. | C/O PLATINUM EQUITY ADVISORS, LLC | 360 NORTH CRESCENT DRIVE, SOUTH BUILDING | (Street) |
1. Name and Address of Reporting Person*Platinum InvestCo (Cayman), LLC | C/O PLATINUM EQUITY ADVISORS, LLC | 360 NORTH CRESCENT DRIVE, SOUTH BUILDING | (Street) |
1. Name and Address of Reporting Person*Platinum Equity Investment Holdings IC (Cayman), LLC | C/O PLATINUM EQUITY ADVISORS, LLC | 360 NORTH CRESCENT DRIVE, SOUTH BUILDING | (Street) |
1. Name and Address of Reporting Person*Platinum Equity Investment Holdings, LLC | C/O PLATINUM EQUITY ADVISORS, LLC | 360 NORTH CRESCENT DRIVE, SOUTH BUILDING | (Street) |
| See Exhibit 99.1 - Signatures | 04/05/2021 |
| ** Signature of Reporting Person | Date |
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. |
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v). |
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a). |
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure. |
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number. |