X0306 4 2021-11-23 0 0000799167 MARTEN TRANSPORT LTD MRTN 0001253979 MARTEN RANDOLPH L 129 MARTEN STREET MONDOVI WI 54755 1 1 1 0 Exec. Chairman of the Board Common Stock 2021-11-23 4 F 0 14807 17.37 D 17711382.37 D These shares were withheld to cover the estimated tax withholding obligations in connection with the issuance of 40,018 shares released from the Issuer's deferred compensation plan which terminated effective May 5, 2021. Includes: (i) 11,999 shares granted under a Performance Unit Award Agreement that vest on 12/31/2021 through 12/31/2025; (ii) 4,256 shares granted under a Performance Unit Award Agreement that vest on 12/31/2021 through 12/31/2024; (iii) 6,840 shares granted under a Performance Unit Award Agreement that vest on 12/31/2021 through 12/31/2023; (iv) 4,350 shares granted under a Performance Unit Award Agreement that vest on 12/31/2021 through 12/31/2022; (v) 5,200 shares granted under a Performance Unit Award Agreement that vest on 12/31/2021; and (vi) 40,017.37 shares that the reporting person has deferred under the Issuer's deferred compensation plan. /s/ James J. Hinnendael, attorney-in-fact 2021-11-23