Exhibit 99.1 MARTEN TRANSPORT ANNOUNCES FOURTH QUARTER AND YEAR END RESULTS MONDOVI, Wis., January 27, 2026 (GLOBE NEWSWIRE) -- Marten Transport, Ltd. (Nasdaq/GS:MRTN) today reported net income of $3.7 million, or 5 cents per diluted share, for the fourth quarter ended December 31, 2025, compared with$5.6 million, or 7 cents per diluted share, for the fourth quarter of 2024. The 2025 fourth-quarter earnings improved 66.1% sequentially from 2025 third-quarter net income of $2.2 million, or 3 cents per dilut ...