X0306 4 2020-04-28 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 2020-04-28 4 M 0 23600 13.512 A 11825199.74 D Common Stock 2020-04-28 4 S 0 17703 23.244 D 11807496.74 D Common Stock 2020-04-29 4 M 0 19500 13.512 A 11826996.74 D Common Stock 2020-04-29 4 S 0 14625 23.0592 D 11812371.74 D Common Stock 2020-04-30 4 M 0 1030 13.512 A 11813401.74 D Common Stock 2020-04-30 4 S 0 772 23 D 11812629.74 D Stock Option (right to buy) 13.512 2020-04-28 4 M 0 23600 0 D 2022-05-12 Common Stock 23600 44067 D Stock Option (right to buy) 13.512 2020-04-29 4 M 0 19500 0 D 2022-05-12 Common Stock 19500 24567 D Stock Option (right to buy) 13.512 2020-04-30 4 M 0 1030 0 D 2022-05-12 Common Stock 1030 23537 D Includes: (i) 6,080 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020 through 12/31/2023; (ii) 4,350 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020 through 12/31/2022; (iii) 6,932 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020 through 12/31/2021; (iv) 933 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020; and (v) 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 $23.00 to $23.93, 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.00 to $23.26, 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 13,534 shares that will vest on May 12, 2020. /s/ James J. Hinnendael, attorney-in-fact 2020-04-30