Custom Truck One Source, Inc. 8-K

What Happened

• On March 10, 2026, Custom Truck One Source, Inc. announced its financial results for the fiscal year and quarter ended December 31, 2025 via a press release furnished as Exhibit 99.1 to the Form 8-K. The company also posted an updated investor presentation on its website (www.customtruck.com). The Form 8-K was signed by CFO Christopher J. Eperjesy.

Key Details

• Press release reporting fiscal year and quarter results dated March 10, 2026 was furnished as Exhibit 99.1.
• Results cover the fiscal year and quarter ended December 31, 2025.
• Company posted an updated investor presentation on its website (Regulation FD disclosure) on March 10, 2026.
• The filing was signed by Chief Financial Officer Christopher J. Eperjesy.

Why It Matters

• The 8-K signals the company has publicly released its latest earnings and updated investor materials; investors should review the press release and presentation for specific revenue, earnings, guidance or other financial metrics.
• Posting the investor presentation under Regulation FD ensures material information is being shared broadly and consistently with the market.
• This filing does not report executive changes, mergers, or bankruptcy — it is focused on financial results and investor communications.