Custom Truck One Source, Inc.

CTOS·NYSE·$9.68Share Price as of 11/2·$2BMarket Cap as of 11/2

Financials

10-QQ3 ended 09/30/2610/26/26 10-QQ2 ended 06/30/2608/03/26 10-QQ1 ended 03/31/2604/27/26 10-KFY 202503/10/26 10-QQ3 ended 09/30/2510/27/25

Disclosures

8-KCurrent report10/26/26 8-KCurrent report08/03/26 8-KCurrent report06/11/26 8-KCurrent report04/27/26 8-KCurrent report03/25/26

Prospectuses and Registrations

S-8Registration of securities for employees05/08/24 S-8Registration of securities for employees08/19/22 424B7Prospectus11/19/21 424B7Prospectus11/15/21 S-3/AShelf registration (amended)09/23/21

Proxies

DEF 14ADefinitive proxy04/29/26 DEFA14AAdditional proxy materials04/29/26 DEF 14ADefinitive proxy04/28/25 DEFA14AAdditional proxy materials04/28/25 DEF 14ADefinitive proxy04/26/24

Ownership

144Proposed sale of securities04/10/26 Form 4Insider transaction04/03/26 Form 4Insider transaction04/03/26 Form 4Insider transaction04/03/26 Form 4Insider transaction04/03/26

Other

ARSAnnual report to shareholders04/29/26 ARSAnnual report to shareholders04/28/25 UPLOADLetter from the SEC04/03/25 CORRESPCorrespondence with the SEC12/12/24 UPLOADLetter from the SEC11/26/24