Exhibit 99.1 For Immediate Release January 28, 2026 LANDSTAR SYSTEM REPORTS FOURTH QUARTER RESULTS Jacksonville, FL—Landstar System, Inc. (NASDAQ: LSTR) ("Landstar" or the "Company") today confirmed its financial results for the 2025 fourth quarter. As previously disclosed in a Form 8-K filed with the U.S. Securities and Exchange Commission (the "SEC") on January 21, 2026, the Company reported total revenue of $1,174 million in the 2025 fourth quarter, compared to$1,209 million in the 2024 fourth quarter. ...