 MONDOVI, Wisc., May 04, 2021 GLOBE NEWSWIRE -- Marten Transport, Ltd. NasdaqGS:MRTN announced today that its Board of Directors has appointed Tim Kohl as its new Chief Executive Officer, effective today. Tim Kohl will succeed Randy Marten, who has served as the Companys Chief Executive Officer since 2005. Randy Marten will serve as Executive Chairman of the Board of Directors as part of this transition. 