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(ii) 2,720 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020 through 12/31/2023; (iii) 2,130 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020 through 12/31/2022; (iv) 3,166 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020 through 12/31/2021; (v) 392 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020; and (vi) 38,497.20 shares that the reporting person has deferred under the Issuer's deferred compensation plan."}],"balance_after":104499.2,"source":{"system":"sec-edgar","filing":"0001235802-20-000040","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/799167/000123580220000040/primary_doc.xml","form_type":"4"}},{"id":3166922,"issuer":{"id":4880,"kind":"organization","name":"MARTEN TRANSPORT LTD"},"owners":[{"id":49253,"kind":"person","name":"Hinnendael James J","position":1,"cik":"0001348356","reported_name":"Hinnendael James J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President & CFO"}}],"security":"Stock Option (right to buy)","published_at":"2020-04-30T20:27:44.000Z","date":"2020-04-28","kind":"exercise","acquired":false,"shares":22533,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"All shares are vested except for 5,634 shares that will vest on May 12, 2020."}],"balance_after":5634,"derivative":{"exercise_price":13.512,"expiration_date":"2022-05-12","underlying":"Common Stock","underlying_shares":22533},"source":{"system":"sec-edgar","filing":"0001235802-20-000029","document":"primary_doc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/799167/000123580220000029/primary_doc.xml","form_type":"4"}},{"id":3166921,"issuer":{"id":4880,"kind":"organization","name":"MARTEN TRANSPORT LTD"},"owners":[{"id":49253,"kind":"person","name":"Hinnendael James J","position":1,"cik":"0001348356","reported_name":"Hinnendael James J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President & CFO"}}],"security":"Common Stock","published_at":"2020-04-30T20:27:44.000Z","date":"2020-04-28","kind":"sale","acquired":false,"shares":17600,"price":23.2,"value":408320.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $22.90 to $23.92, 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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Includes: (i) 2,720 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020 through 12/31/2023; (ii) 2,130 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020 through 12/31/2022; (iii) 3,166 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020 through 12/31/2021; (iv) 392 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020; and (v) 38,497.20 shares that the reporting person has deferred under the Issuer's deferred compensation plan."}],"balance_after":102817.2,"source":{"system":"sec-edgar","filing":"0001235802-20-000029","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/799167/000123580220000029/primary_doc.xml","form_type":"4"}},{"id":3166920,"issuer":{"id":4880,"kind":"organization","name":"MARTEN TRANSPORT LTD"},"owners":[{"id":49253,"kind":"person","name":"Hinnendael James J","position":1,"cik":"0001348356","reported_name":"Hinnendael James J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President & CFO"}}],"security":"Common Stock","published_at":"2020-04-30T20:27:44.000Z","date":"2020-04-28","kind":"exercise","acquired":true,"shares":22533,"price":13.512,"value":304465.896,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Includes: (i) 2,720 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020 through 12/31/2023; (ii) 2,130 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020 through 12/31/2022; (iii) 3,166 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020 through 12/31/2021; (iv) 392 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020; and (v) 38,497.20 shares that the reporting person has deferred under the Issuer's deferred compensation plan."}],"balance_after":120417.2,"source":{"system":"sec-edgar","filing":"0001235802-20-000029","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/799167/000123580220000029/primary_doc.xml","form_type":"4"}},{"id":3189940,"issuer":{"id":4880,"kind":"organization","name":"MARTEN TRANSPORT LTD"},"owners":[{"id":49253,"kind":"person","name":"Hinnendael James J","position":1,"cik":"0001348356","reported_name":"Hinnendael James J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Exec. 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(ii) 2,130 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020 through 12/31/2022; (iii) 3,166 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020 through 12/31/2021; (iv) 392 shares granted under a Performance Unit Award Agreement that vest on 12/31/2020; and (v) 38,422.30 shares that the reporting person has deferred under the Issuer's deferred compensation plan."}],"balance_after":99935.3,"source":{"system":"sec-edgar","filing":"0001235802-20-000015","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/799167/000123580220000015/primary_doc.xml","form_type":"4"}},{"id":3330105,"issuer":{"id":4880,"kind":"organization","name":"MARTEN TRANSPORT LTD"},"owners":[{"id":49253,"kind":"person","name":"Hinnendael James J","position":1,"cik":"0001348356","reported_name":"Hinnendael James J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2019-12-30T21:16:15.000Z","date":"2019-12-27","kind":"grant","acquired":true,"shares":47.16,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents dividend equivalent rights that accrued on December 27, 2019."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes: (i) 3,400 shares granted under a Performance Unit Award Agreement that vest on 12/31/2019 through 12/31/2023; (ii) 2,840 shares granted under a Performance Unit Award Agreement that vest on 12/31/2019 through 12/31/2022; (iii) 4,750 shares granted under a Performance Unit Award Agreement that vest on 12/31/2019 through 12/31/2021; (iv) 783 shares granted under a Performance Unit Award Agreement that vest on 12/31/2019 through 12/31/2020; (v) 392 shares granted under a Performance Unit Award Agreement that vest on 12/31/2019; and (vi) 34,047.30 shares that the reporting person has deferred under the Issuer's deferred compensation plan."}],"balance_after":94941.3,"source":{"system":"sec-edgar","filing":"0001235802-19-000145","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/799167/000123580219000145/primary_doc.xml","form_type":"4"}},{"id":3403815,"issuer":{"id":4880,"kind":"organization","name":"MARTEN TRANSPORT LTD"},"owners":[{"id":49253,"kind":"person","name":"Hinnendael James J","position":1,"cik":"0001348356","reported_name":"Hinnendael James J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President & CFO"}}],"security":"Common Stock","published_at":"2019-10-01T20:10:25.000Z","date":"2019-09-30","kind":"grant","acquired":true,"shares":1077.36,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents dividend equivalent rights that accrued on September 30, 2019."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes: (i) 3,400 shares granted under a Performance Unit Award Agreement that vest on 12/31/2019 through 12/31/2023; (ii) 2,840 shares granted under a Performance Unit Award Agreement that vest on 12/31/2019 through 12/31/2022; (iii) 4,750 shares granted under a Performance Unit Award Agreement that vest on 12/31/2019 through 12/31/2021; (iv) 783 shares granted under a Performance Unit Award Agreement that vest on 12/31/2019 through 12/31/2020; (v) 392 shares granted under a Performance Unit Award Agreement that vest on 12/31/2019; and (vi) 34,000.14 shares that the reporting person has deferred under the Issuer's deferred compensation plan."}],"balance_after":94894.14,"source":{"system":"sec-edgar","filing":"0001235802-19-000124","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/799167/000123580219000124/primary_doc.xml","form_type":"4"}},{"id":3475366,"issuer":{"id":4880,"kind":"organization","name":"MARTEN TRANSPORT LTD"},"owners":[{"id":49253,"kind":"person","name":"Hinnendael James J","position":1,"cik":"0001348356","reported_name":"Hinnendael James J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President & CFO"}}],"security":"Common Stock","published_at":"2019-07-01T20:08:38.000Z","date":"2019-06-28","kind":"grant","acquired":true,"shares":54.33,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents dividend equivalent rights that accrued on June 28, 2019."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes: (i) 3,400 shares granted under a Performance Unit Award Agreement that vest on 12/31/2019 through 12/31/2023; (ii) 2,840 shares granted under a Performance Unit Award Agreement that vest on 12/31/2019 through 12/31/2022; (iii) 4,750 shares granted under a Performance Unit Award Agreement that vest on 12/31/2019 through 12/31/2021; (iv) 783 shares granted under a Performance Unit Award Agreement that vest on 12/31/2019 through 12/31/2020; (v) 392 shares granted under a Performance Unit Award Agreement that vest on 12/31/2019; and (vi) 32,922.78 shares that the reporting person has deferred under the Issuer's deferred compensation plan."}],"balance_after":93816.78,"source":{"system":"sec-edgar","filing":"0001235802-19-000068","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/799167/000123580219000068/primary_doc.xml","form_type":"4"}},{"id":3534224,"issuer":{"id":4880,"kind":"organization","name":"MARTEN TRANSPORT LTD"},"owners":[{"id":49253,"kind":"person","name":"Hinnendael James J","position":1,"cik":"0001348356","reported_name":"Hinnendael James J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President & CFO"}}],"security":"Common Stock","published_at":"2019-05-09T20:28:59.000Z","date":"2019-05-07","kind":"grant","acquired":true,"shares":3400,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These shares granted under a Performance Unit Award Agreement will vest in equal increments over five years beginning on December 31, 2019."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes: (i) 3,400 shares granted under a Performance Unit Award Agreement that vest on 12/31/2019 through 12/31/2023; 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(ii) 940 shares granted under a Performance Unit Award Agreement that vest on 12/31/2016 through 12/31/2019; (iii) 720 shares granted under a Performance Unit Award Agreement that vest on 12/31/2016 through 12/31/2018, (iv) 720 shares granted under a Performance Unit Award Agreement that vest on 12/31/2016 through 12/31/2017, (v) 352 shares granted under a Performance Unit Award Agreement that vest on 12/31/2016 and (vi) 12,111.52 shares that the reporting person has deferred under the Issuer's deferred compensation plan."}],"balance_after":36374.52,"source":{"system":"sec-edgar","filing":"0001235802-16-000343","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/799167/000123580216000343/primary_doc.xml","form_type":"4"}},{"id":4593775,"issuer":{"id":4880,"kind":"organization","name":"MARTEN TRANSPORT LTD"},"owners":[{"id":49253,"kind":"person","name":"Hinnendael James J","position":1,"cik":"0001348356","reported_name":"Hinnendael James J","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive VP and CFO"}}],"security":"Common Stock","published_at":"2016-09-28T20:09:38.000Z","date":"2016-09-27","kind":"grant","acquired":true,"shares":14.58,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents dividend equivalent rights that accrued on September 27, 2016."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes:  (i) 1,175 shares granted under a Performance Unit Award Agreement that vest on 12/31/2016 through 12/31/2020; (ii) 940 shares granted under a Performance Unit Award Agreement that vest on 12/31/2016 through 12/31/2019; (iii) 720 shares granted under a Performance Unit Award Agreement that vest on 12/31/2016 through 12/31/2018, (iv) 720 shares granted under a Performance Unit Award Agreement that vest on 12/31/2016 through 12/31/2017, (v) 352 shares granted under a Performance Unit Award Agreement that vest on 12/31/2016 and (vi) 12,098.59 shares that the reporting person has deferred under the Issuer's deferred compensation plan."}],"balance_after":36361.59,"source":{"system":"sec-edgar","filing":"0001235802-16-000303","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/799167/000123580216000303/primary_doc.xml","form_type":"4"}}]}