X0306 4 2021-11-23 0 0000799167 MARTEN TRANSPORT LTD MRTN 0001348356 Hinnendael James J 129 MARTEN STREET MONDOVI WI 54755 0 1 0 0 Exec. VP and CFO Common Stock 2021-11-23 4 F 0 9284 17.37 D 145293.43 D These shares were withheld to cover the estimated tax withholding obligations in connection with the issuance of 16,880 shares released from the Issuer's deferred compensation plan which terminated effective May 5, 2021. Includes: (i) 6,040 shares granted under a Performance Unit Award Agreement that vest on 12/31/2021 through 12/31/2025; (ii) 2,020 shares granted under a Performance Unit Award Agreement that vest on 12/31/2021 through 12/31/2024; (iii) 3,060 shares granted under a Performance Unit Award Agreement that vest on 12/31/2021 through 12/31/2023; (iv) 2,130 shares granted under a Performance Unit Award Agreement that vest on 12/31/2021 through 12/31/2022; (v) 2,375 shares granted under a Performance Unit Award Agreement that vest on 12/31/2021; and (vi) 16,879.43 shares that the reporting person has deferred under the Issuer's deferred compensation plan. /s/ James J. Hinnendael 2021-11-23