MARK EIN - 17 Oct 2025 Form 4 Insider Report for Custom Truck One Source, Inc. (CTOS)

Role
Director
Signature
/s/ Mark Ein
Issuer symbol
CTOS
Transactions as of
17 Oct 2025
Transactions value $
$0
Form type
4
Filing time
21 Oct 2025, 16:30:02 UTC
Previous filing
12 Aug 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
EIN MARK Director 7701 INDEPENDENCE AVE., KANSAS CITY /s/ Mark Ein 21 Oct 2025 0001246840

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction CTOS Common Stock Other $0 -3.67M -100% $0.00 0 17 Oct 2025 By Capitol Acquisition Management IV, LLC F1
holding CTOS Common Stock 5.14M 17 Oct 2025 Direct F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Represents a pro-rata distribution in-kind by Capitol Acquisition Management IV, LLC to its members for no consideration (the "Distribution").
F2 Includes shares received in the Distribution.