X0306 4 2020-05-05 0 0000799167 MARTEN TRANSPORT LTD MRTN 0001253983 TURNER JOHN H 129 MARTEN STREET MONDOVI WI 54755 0 1 0 0 Exec. VP of Sales & Marketing Common Stock 2020-05-05 4 A 0 1655 0 A 69728.12 D Common Stock 2020-05-06 4 M 0 4260 13.512 A 73988.12 D Common Stock 2020-05-06 4 S 0 4260 25.1742 D 69728.12 D Stock Option (right to buy) 13.512 2020-05-06 4 M 0 4260 0 D 2022-05-12 Common Stock 4260 13107 D These shares granted under a Performance Unit Award Agreement will vest in equal increments over five years beginning on December 31, 2020. Includes: (i) 1,655 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020 through 12/31/2024; (ii) 2,680 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020 through 12/31/2023; (iii) 1,770 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020 through 12/31/2022; (iv) 2,966 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020 through 12/31/2021; (v) 383 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020; and (vi) 37,462.12 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 $25.145 to $25.185, 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 (3) to this Form 4. All shares are vested except for 5,567 shares that will vest on May 12, 2020. /s/ James J. Hinnendael, attorney-in-fact 2020-05-07