X0306 4 2020-05-12 0 0000799167 MARTEN TRANSPORT LTD MRTN 0001253979 MARTEN RANDOLPH L 129 MARTEN STREET MONDOVI WI 54755 1 1 1 0 Chairman of the Board and CEO Common Stock 2020-05-12 4 M 0 13534 13.512 A 11832214.74 D Common Stock 2020-05-12 4 S 0 13534 24.667 D 11818680.74 D Stock Option (right to buy) 13.512 2020-05-12 4 M 0 13534 0 D 2022-05-12 Common Stock 13534 0 D Includes: (i) 3,548 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020 through 12/31/2024; (ii) 6,080 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020 through 12/31/2023; (iii) 4,350 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020 through 12/31/2022; (iv) 6,932 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020 through 12/31/2021; (v) 933 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020; and (vi) 91,779.74 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 $24.50 to $25.00, 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. This option has fully vested. /s/James J. Hinnendael, attorney-in-fact 2020-05-12