X0306 4 2020-04-28 0 0000799167 MARTEN TRANSPORT LTD MRTN 0001348356 Hinnendael James J 129 MARTEN STREET MONDOVI WI 54755 0 1 0 0 Executive Vice President & CFO Common Stock 2020-04-28 4 M 0 22533 13.512 A 120417.2 D Common Stock 2020-04-28 4 S 0 17600 23.2 D 102817.2 D Stock Option (right to buy) 13.512 2020-04-28 4 M 0 22533 0 D 2022-05-12 Common Stock 22533 5634 D Includes: (i) 2,720 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020 through 12/31/2023; (ii) 2,130 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020 through 12/31/2022; (iii) 3,166 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020 through 12/31/2021; (iv) 392 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020; and (v) 38,497.20 shares that the reporting person has deferred under the Issuer's deferred compensation plan. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.90 to $23.92, inclusive. The reporting person undertakes to provide to Marten Transport, Ltd., any security holder of Marten Transport, Ltd., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (2) to this Form 4. All shares are vested except for 5,634 shares that will vest on May 12, 2020. /s/ James J. Hinnendael 2020-04-30