Exhibit 99.1 PACCAR Inc Public Affairs Department P.O. Box 1518 Bellevue, WA 98009 Contact: Ken Hastings (425) 468-7530 ken.hastings@paccar.com FOR IMMEDIATE RELEASE PACCAR Achieves Very Good Annual Revenues and Net Income January 27, 2026, Bellevue, Washington – "PACCAR reported very good annual revenues and net income in 2025," said Preston Feight, chief executive officer. "PACCAR Parts and PACCAR Financial Services delivered record revenue and strong profits. Kenworth, Peterbilt and DAF's premium quality ...