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The reporting person undertakes to provide the Company, any security holder of the Company, 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 range set forth in this footnote."}],"balance_after":11160,"source":{"system":"sec-edgar","filing":"0000899243-19-022205","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1514416/000089924319022205/doc4.xml","form_type":"4"}},{"id":3431791,"issuer":{"id":350,"kind":"organization","name":"Bandwidth Inc.","symbol":"BAND"},"owners":[{"id":151699,"kind":"person","name":"Kaestner Henry R.","position":1,"cik":"0001721977","reported_name":"Kaestner Henry R.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2019-08-21T20:30:21.000Z","date":"2019-08-19","kind":"sale","acquired":false,"shares":2034,"price":86.2888,"value":175511.4192,"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 $86.22 to $86.49. The reporting person undertakes to provide the Company, any security holder of the Company, 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 range set forth in this footnote."}],"balance_after":16421,"source":{"system":"sec-edgar","filing":"0000899243-19-022205","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1514416/000089924319022205/doc4.xml","form_type":"4"}},{"id":3431790,"issuer":{"id":350,"kind":"organization","name":"Bandwidth Inc.","symbol":"BAND"},"owners":[{"id":151699,"kind":"person","name":"Kaestner Henry R.","position":1,"cik":"0001721977","reported_name":"Kaestner Henry R.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2019-08-21T20:30:21.000Z","date":"2019-08-19","kind":"sale","acquired":false,"shares":9390,"price":85.2933,"value":800904.087,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $85.00 to $85.845. The reporting person undertakes to provide Bandwidth Inc. (the \"Company\"), any security holder of the Company, 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 range set forth in this footnote."}],"balance_after":18455,"source":{"system":"sec-edgar","filing":"0000899243-19-022205","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1514416/000089924319022205/doc4.xml","form_type":"4"}},{"id":3464091,"issuer":{"id":350,"kind":"organization","name":"Bandwidth Inc.","symbol":"BAND"},"owners":[{"id":151699,"kind":"person","name":"Kaestner Henry R.","position":1,"cik":"0001721977","reported_name":"Kaestner Henry R.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2019-07-10T20:30:21.000Z","date":"2019-07-03","kind":"sale","acquired":false,"shares":10425,"price":78.4497,"value":817838.1225,"ownership":{"direct":false,"nature":"By AMDG 1, LLC"},"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 $78.01 to $78.87. The reporting person undertakes to provide the Company, any security holder of the Company, 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 range set forth in this footnote."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The members of AMDG 1, LLC are AMDG Unitrust No. 1 and AMDG Unitrust No. 2 (together, the \"Trusts\"). The trustees of each of the Trusts are the Reporting Person, his spouse and Timothy Oakley. Each of the foregoing individuals disclaims beneficial ownership of the shares held by AMDG 1, LLC except to the extent of his or her pecuniary interest, if any."}],"balance_after":59282,"source":{"system":"sec-edgar","filing":"0000899243-19-019431","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1514416/000089924319019431/doc4.xml","form_type":"4"}},{"id":3464090,"issuer":{"id":350,"kind":"organization","name":"Bandwidth Inc.","symbol":"BAND"},"owners":[{"id":151699,"kind":"person","name":"Kaestner Henry R.","position":1,"cik":"0001721977","reported_name":"Kaestner Henry R.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2019-07-10T20:30:21.000Z","date":"2019-07-03","kind":"sale","acquired":false,"shares":27316,"price":77.088,"value":2105735.808,"ownership":{"direct":false,"nature":"By AMDG 1, LLC"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $77.00 to $77.86. The reporting person undertakes to provide Bandwidth Inc. (the \"Company\"), any security holder of the Company, 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 range set forth in this footnote."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The members of AMDG 1, LLC are AMDG Unitrust No. 1 and AMDG Unitrust No. 2 (together, the \"Trusts\"). The trustees of each of the Trusts are the Reporting Person, his spouse and Timothy Oakley. Each of the foregoing individuals disclaims beneficial ownership of the shares held by AMDG 1, LLC except to the extent of his or her pecuniary interest, if any."}],"balance_after":69707,"source":{"system":"sec-edgar","filing":"0000899243-19-019431","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1514416/000089924319019431/doc4.xml","form_type":"4"}},{"id":3470419,"issuer":{"id":350,"kind":"organization","name":"Bandwidth Inc.","symbol":"BAND"},"owners":[{"id":151699,"kind":"person","name":"Kaestner Henry R.","position":1,"cik":"0001721977","reported_name":"Kaestner Henry R.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2019-07-02T20:31:18.000Z","date":"2019-07-01","kind":"sale","acquired":false,"shares":721,"price":78.9537,"value":56925.6177,"ownership":{"direct":false,"nature":"By AMDG 1, LLC"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F7","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $78.57 to $79.68. The reporting person undertakes to provide the Company, any security holder of the Company, 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 range set forth in this footnote."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The members of AMDG 1, LLC are AMDG Unitrust No. 1 and AMDG Unitrust No. 2 (together, the \"Trusts\"). The trustees of each of the Trusts are the Reporting Person, his spouse and Timothy Oakley. Each of the foregoing individuals disclaims beneficial ownership of the shares held by AMDG 1, LLC except to the extent of his or her pecuniary interest, if any."}],"balance_after":97023,"source":{"system":"sec-edgar","filing":"0000899243-19-018883","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1514416/000089924319018883/doc4.xml","form_type":"4"}},{"id":3470418,"issuer":{"id":350,"kind":"organization","name":"Bandwidth Inc.","symbol":"BAND"},"owners":[{"id":151699,"kind":"person","name":"Kaestner Henry R.","position":1,"cik":"0001721977","reported_name":"Kaestner Henry R.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2019-07-02T20:31:18.000Z","date":"2019-07-01","kind":"sale","acquired":false,"shares":16920,"price":77.7614,"value":1315722.888,"ownership":{"direct":false,"nature":"By AMDG 1, LLC"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F6","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $77.175 to $78.175. The reporting person undertakes to provide the Company, any security holder of the Company, 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 range set forth in this footnote."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The members of AMDG 1, LLC are AMDG Unitrust No. 1 and AMDG Unitrust No. 2 (together, the \"Trusts\"). The trustees of each of the Trusts are the Reporting Person, his spouse and Timothy Oakley. Each of the foregoing individuals disclaims beneficial ownership of the shares held by AMDG 1, LLC except to the extent of his or her pecuniary interest, if any."}],"balance_after":97744,"source":{"system":"sec-edgar","filing":"0000899243-19-018883","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1514416/000089924319018883/doc4.xml","form_type":"4"}},{"id":3470417,"issuer":{"id":350,"kind":"organization","name":"Bandwidth Inc.","symbol":"BAND"},"owners":[{"id":151699,"kind":"person","name":"Kaestner Henry R.","position":1,"cik":"0001721977","reported_name":"Kaestner Henry R.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2019-07-02T20:31:18.000Z","date":"2019-07-01","kind":"sale","acquired":false,"shares":9706,"price":76.8274,"value":745686.7444,"ownership":{"direct":false,"nature":"By AMDG 1, LLC"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $76.17 to $77.13. The reporting person undertakes to provide the Company, any security holder of the Company, 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 range set forth in this footnote."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The members of AMDG 1, LLC are AMDG Unitrust No. 1 and AMDG Unitrust No. 2 (together, the \"Trusts\"). The trustees of each of the Trusts are the Reporting Person, his spouse and Timothy Oakley. Each of the foregoing individuals disclaims beneficial ownership of the shares held by AMDG 1, LLC except to the extent of his or her pecuniary interest, if any."}],"balance_after":114664,"source":{"system":"sec-edgar","filing":"0000899243-19-018883","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1514416/000089924319018883/doc4.xml","form_type":"4"}},{"id":3470416,"issuer":{"id":350,"kind":"organization","name":"Bandwidth Inc.","symbol":"BAND"},"owners":[{"id":151699,"kind":"person","name":"Kaestner Henry R.","position":1,"cik":"0001721977","reported_name":"Kaestner Henry R.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2019-07-02T20:31:18.000Z","date":"2019-07-01","kind":"sale","acquired":false,"shares":15658,"price":75.4774,"value":1181825.1292,"ownership":{"direct":false,"nature":"By AMDG 1, LLC"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $75.13 to $76.155. The reporting person undertakes to provide the Company, any security holder of the Company, 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 range set forth in this footnote."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The members of AMDG 1, LLC are AMDG Unitrust No. 1 and AMDG Unitrust No. 2 (together, the \"Trusts\"). The trustees of each of the Trusts are the Reporting Person, his spouse and Timothy Oakley. Each of the foregoing individuals disclaims beneficial ownership of the shares held by AMDG 1, LLC except to the extent of his or her pecuniary interest, if any."}],"balance_after":124370,"source":{"system":"sec-edgar","filing":"0000899243-19-018883","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1514416/000089924319018883/doc4.xml","form_type":"4"}},{"id":3470415,"issuer":{"id":350,"kind":"organization","name":"Bandwidth Inc.","symbol":"BAND"},"owners":[{"id":151699,"kind":"person","name":"Kaestner Henry R.","position":1,"cik":"0001721977","reported_name":"Kaestner Henry R.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2019-07-02T20:31:18.000Z","date":"2019-06-28","kind":"sale","acquired":false,"shares":3076,"price":74.6989,"value":229773.8164,"ownership":{"direct":false,"nature":"By AMDG 1, LLC"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $75.13 to $75.71. The reporting person undertakes to provide the Company, any security holder of the Company, 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 range set forth in this footnote."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The members of AMDG 1, LLC are AMDG Unitrust No. 1 and AMDG Unitrust No. 2 (together, the \"Trusts\"). The trustees of each of the Trusts are the Reporting Person, his spouse and Timothy Oakley. Each of the foregoing individuals disclaims beneficial ownership of the shares held by AMDG 1, LLC except to the extent of his or her pecuniary interest, if any."}],"balance_after":140028,"source":{"system":"sec-edgar","filing":"0000899243-19-018883","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1514416/000089924319018883/doc4.xml","form_type":"4"}},{"id":3470414,"issuer":{"id":350,"kind":"organization","name":"Bandwidth Inc.","symbol":"BAND"},"owners":[{"id":151699,"kind":"person","name":"Kaestner Henry R.","position":1,"cik":"0001721977","reported_name":"Kaestner Henry R.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2019-07-02T20:31:18.000Z","date":"2019-06-28","kind":"sale","acquired":false,"shares":16896,"price":74.6989,"value":1262112.6144,"ownership":{"direct":false,"nature":"By AMDG 1, LLC"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $74.12 to $75.115. The reporting person undertakes to provide Bandwidth Inc. (the \"Company\"), any security holder of the Company, 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 range set forth in this footnote."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The members of AMDG 1, LLC are AMDG Unitrust No. 1 and AMDG Unitrust No. 2 (together, the \"Trusts\"). The trustees of each of the Trusts are the Reporting Person, his spouse and Timothy Oakley. Each of the foregoing individuals disclaims beneficial ownership of the shares held by AMDG 1, LLC except to the extent of his or her pecuniary interest, if any."}],"balance_after":143104,"source":{"system":"sec-edgar","filing":"0000899243-19-018883","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1514416/000089924319018883/doc4.xml","form_type":"4"}},{"id":3485780,"issuer":{"id":350,"kind":"organization","name":"Bandwidth Inc.","symbol":"BAND"},"owners":[{"id":151699,"kind":"person","name":"Kaestner Henry R.","position":1,"cik":"0001721977","reported_name":"Kaestner Henry R.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2019-06-18T21:03:36.000Z","date":"2019-06-14","kind":"sale","acquired":false,"shares":10000,"price":77.35,"value":773500.0,"ownership":{"direct":false,"nature":"By AMDG 1, LLC"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"The members of AMDG 1, LLC are AMDG Unitrust No. 1 and AMDG Unitrust No. 2 (together, the \"Trusts\"). The trustees of each of the Trusts are the Reporting Person, his spouse and Timothy Oakley. Each of the foregoing individuals disclaims beneficial ownership of the shares held by AMDG 1, LLC except to the extent of his or her pecuniary interest, if any."}],"balance_after":160000,"source":{"system":"sec-edgar","filing":"0000899243-19-017289","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1514416/000089924319017289/doc4.xml","form_type":"4"}},{"id":3490919,"issuer":{"id":350,"kind":"organization","name":"Bandwidth Inc.","symbol":"BAND"},"owners":[{"id":151699,"kind":"person","name":"Kaestner Henry R.","position":1,"cik":"0001721977","reported_name":"Kaestner Henry R.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2019-06-13T23:12:43.000Z","date":"2019-06-13","kind":"sale","acquired":false,"shares":26106,"price":76.1915,"value":1989055.299,"ownership":{"direct":false,"nature":"By AMDG 1, LLC"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $76.00 to $76.50. The reporting person undertakes to provide the Company, any security holder of the Company, 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 range set forth in this footnote."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"The members of AMDG 1, LLC are AMDG Unitrust No. 1 and AMDG Unitrust No. 2 (together, the \"Trusts\"). The trustees of each of the Trusts are the Reporting Person, his spouse and Timothy Oakley. Each of the foregoing individuals disclaims beneficial ownership of the shares held by AMDG 1, LLC except to the extent of his or her pecuniary interest, if any."}],"balance_after":170000,"source":{"system":"sec-edgar","filing":"0000899243-19-016892","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1514416/000089924319016892/doc4.xml","form_type":"4"}},{"id":3490918,"issuer":{"id":350,"kind":"organization","name":"Bandwidth Inc.","symbol":"BAND"},"owners":[{"id":151699,"kind":"person","name":"Kaestner Henry R.","position":1,"cik":"0001721977","reported_name":"Kaestner Henry R.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2019-06-13T23:12:43.000Z","date":"2019-06-12","kind":"sale","acquired":false,"shares":13894,"price":75.9077,"value":1054661.5838,"ownership":{"direct":false,"nature":"By AMDG 1, LLC"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $75.835 to $76.21. The reporting person undertakes to provide the Company, any security holder of the Company, 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 range set forth in this footnote."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"The members of AMDG 1, LLC are AMDG Unitrust No. 1 and AMDG Unitrust No. 2 (together, the \"Trusts\"). The trustees of each of the Trusts are the Reporting Person, his spouse and Timothy Oakley. Each of the foregoing individuals disclaims beneficial ownership of the shares held by AMDG 1, LLC except to the extent of his or her pecuniary interest, if any."}],"balance_after":196106,"source":{"system":"sec-edgar","filing":"0000899243-19-016892","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1514416/000089924319016892/doc4.xml","form_type":"4"}},{"id":3490917,"issuer":{"id":350,"kind":"organization","name":"Bandwidth Inc.","symbol":"BAND"},"owners":[{"id":151699,"kind":"person","name":"Kaestner Henry R.","position":1,"cik":"0001721977","reported_name":"Kaestner Henry R.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2019-06-13T23:12:43.000Z","date":"2019-06-11","kind":"sale","acquired":false,"shares":10000,"price":73.0003,"value":730003.0,"ownership":{"direct":false,"nature":"By AMDG 1, LLC"},"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 $73.00 to $73.02. The reporting person undertakes to provide Bandwidth Inc. (the \"Company\"), any security holder of the Company, 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 range set forth in this footnote."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"The members of AMDG 1, LLC are AMDG Unitrust No. 1 and AMDG Unitrust No. 2 (together, the \"Trusts\"). The trustees of each of the Trusts are the Reporting Person, his spouse and Timothy Oakley. Each of the foregoing individuals disclaims beneficial ownership of the shares held by AMDG 1, LLC except to the extent of his or her pecuniary interest, if any."}],"balance_after":210000,"source":{"system":"sec-edgar","filing":"0000899243-19-016892","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1514416/000089924319016892/doc4.xml","form_type":"4"}},{"id":3490916,"issuer":{"id":350,"kind":"organization","name":"Bandwidth Inc.","symbol":"BAND"},"owners":[{"id":151699,"kind":"person","name":"Kaestner Henry R.","position":1,"cik":"0001721977","reported_name":"Kaestner Henry R.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2019-06-13T23:12:43.000Z","date":"2019-06-11","kind":"gift","acquired":true,"shares":220000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By AMDG 1, LLC"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"The members of AMDG 1, LLC are AMDG Unitrust No. 1 and AMDG Unitrust No. 2 (together, the \"Trusts\"). The trustees of each of the Trusts are the Reporting Person, his spouse and Timothy Oakley. Each of the foregoing individuals disclaims beneficial ownership of the shares held by AMDG 1, LLC except to the extent of his or her pecuniary interest, if any."}],"balance_after":220000,"source":{"system":"sec-edgar","filing":"0000899243-19-016892","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1514416/000089924319016892/doc4.xml","form_type":"4"}},{"id":3490915,"issuer":{"id":350,"kind":"organization","name":"Bandwidth Inc.","symbol":"BAND"},"owners":[{"id":151699,"kind":"person","name":"Kaestner Henry R.","position":1,"cik":"0001721977","reported_name":"Kaestner Henry R.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common 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a contingent right to receive one share of the Company's Class A Common Stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"On January 24, 2018, the Reporting Person was granted 3,288 Restricted Stock Units which vest in four equal quarterly installments beginning on March 31, 2018."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"On January 24, 2018, the Reporting Person was granted 3,288 Restricted Stock Units which vest in four equal quarterly installments beginning on March 31, 2018."}],"balance_after":822,"derivative":{"underlying":"Class A Common 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AMDG Unitrust No. 2"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $45.00 to $45.15. The reporting person undertakes to provide the Company, any security holder of the Company, 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 range set forth in this footnote."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0000899243-18-023372","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1514416/000089924318023372/doc4.xml","form_type":"4"}},{"id":3831339,"issuer":{"id":350,"kind":"organization","name":"Bandwidth Inc.","symbol":"BAND"},"owners":[{"id":151699,"kind":"person","name":"Kaestner Henry R.","position":1,"cik":"0001721977","reported_name":"Kaestner Henry R.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2018-08-28T20:06:13.000Z","date":"2018-08-24","kind":"sale","acquired":false,"shares":25203,"price":45.0393,"value":1135125.4779,"ownership":{"direct":false,"nature":"By AMDG Unitrust No. 1"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan."},{"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 $45.00 to $45.15. The reporting person undertakes to provide Bandwidth Inc. (the \"Company\"), any security holder of the Company, 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 range set forth in this footnote."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0000899243-18-023372","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1514416/000089924318023372/doc4.xml","form_type":"4"}},{"id":3833605,"issuer":{"id":350,"kind":"organization","name":"Bandwidth Inc.","symbol":"BAND"},"owners":[{"id":151699,"kind":"person","name":"Kaestner Henry R.","position":1,"cik":"0001721977","reported_name":"Kaestner Henry R.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2018-08-24T20:06:06.000Z","date":"2018-08-23","kind":"sale","acquired":false,"shares":7652,"price":45.0354,"value":344610.8808,"ownership":{"direct":false,"nature":"By AMDG Unitrust No. 2"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $45.00 to $45.22. The reporting person undertakes to provide the Company, any security holder of the Company, 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 range set forth in this footnote."}],"balance_after":16848,"source":{"system":"sec-edgar","filing":"0000899243-18-023216","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1514416/000089924318023216/doc4.xml","form_type":"4"}},{"id":3833604,"issuer":{"id":350,"kind":"organization","name":"Bandwidth Inc.","symbol":"BAND"},"owners":[{"id":151699,"kind":"person","name":"Kaestner Henry R.","position":1,"cik":"0001721977","reported_name":"Kaestner Henry R.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2018-08-24T20:06:06.000Z","date":"2018-08-23","kind":"sale","acquired":false,"shares":11447,"price":45.0354,"value":515520.2238,"ownership":{"direct":false,"nature":"By AMDG Unitrust No. 1"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan."},{"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 $45.00 to $45.22. The reporting person undertakes to provide Bandwidth Inc. (the \"Company\"), any security holder of the Company, 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 range set forth in this footnote."}],"balance_after":25203,"source":{"system":"sec-edgar","filing":"0000899243-18-023216","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1514416/000089924318023216/doc4.xml","form_type":"4"}},{"id":3833603,"issuer":{"id":350,"kind":"organization","name":"Bandwidth Inc.","symbol":"BAND"},"owners":[{"id":151699,"kind":"person","name":"Kaestner Henry R.","position":1,"cik":"0001721977","reported_name":"Kaestner Henry R.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2018-08-24T20:06:06.000Z","date":"2018-08-22","kind":"sale","acquired":false,"shares":100,"price":45,"value":4500.0,"ownership":{"direct":false,"nature":"By AMDG Unitrust No. 1"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan."}],"balance_after":36650,"source":{"system":"sec-edgar","filing":"0000899243-18-023216","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1514416/000089924318023216/doc4.xml","form_type":"4"}},{"id":3843060,"issuer":{"id":350,"kind":"organization","name":"Bandwidth Inc.","symbol":"BAND"},"owners":[{"id":151699,"kind":"person","name":"Kaestner Henry R.","position":1,"cik":"0001721977","reported_name":"Kaestner Henry R.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2018-08-15T20:43:34.000Z","date":"2018-08-13","kind":"sale","acquired":false,"shares":500,"price":44.538,"value":22269.0,"ownership":{"direct":false,"nature":"By AMDG Unitrust No. 2"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $44.48 to $44.66. The reporting person undertakes to provide the Company, any security holder of the Company, 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 range set forth in this footnote."}],"balance_after":24500,"source":{"system":"sec-edgar","filing":"0000899243-18-022470","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1514416/000089924318022470/doc4.xml","form_type":"4"}},{"id":3843059,"issuer":{"id":350,"kind":"organization","name":"Bandwidth Inc.","symbol":"BAND"},"owners":[{"id":151699,"kind":"person","name":"Kaestner Henry R.","position":1,"cik":"0001721977","reported_name":"Kaestner Henry R.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2018-08-15T20:43:34.000Z","date":"2018-08-13","kind":"sale","acquired":false,"shares":3000,"price":43.8618,"value":131585.4,"ownership":{"direct":false,"nature":"By AMDG Unitrust No. 2"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $43.42 to $44.35. The reporting person undertakes to provide the Company, any security holder of the Company, 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 range set forth in this footnote."}],"balance_after":25000,"source":{"system":"sec-edgar","filing":"0000899243-18-022470","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1514416/000089924318022470/doc4.xml","form_type":"4"}},{"id":3843058,"issuer":{"id":350,"kind":"organization","name":"Bandwidth Inc.","symbol":"BAND"},"owners":[{"id":151699,"kind":"person","name":"Kaestner Henry R.","position":1,"cik":"0001721977","reported_name":"Kaestner Henry R.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2018-08-15T20:43:34.000Z","date":"2018-08-13","kind":"sale","acquired":false,"shares":800,"price":44.5412,"value":35632.96,"ownership":{"direct":false,"nature":"By AMDG Unitrust No. 1"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $44.40 to $44.75. The reporting person undertakes to provide the Company, any security holder of the Company, 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 range set forth in this footnote."}],"balance_after":36750,"source":{"system":"sec-edgar","filing":"0000899243-18-022470","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1514416/000089924318022470/doc4.xml","form_type":"4"}},{"id":3843057,"issuer":{"id":350,"kind":"organization","name":"Bandwidth Inc.","symbol":"BAND"},"owners":[{"id":151699,"kind":"person","name":"Kaestner Henry R.","position":1,"cik":"0001721977","reported_name":"Kaestner Henry R.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2018-08-15T20:43:34.000Z","date":"2018-08-13","kind":"sale","acquired":false,"shares":4450,"price":43.8635,"value":195192.575,"ownership":{"direct":false,"nature":"By AMDG Unitrust No. 1"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan."},{"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 $43.40 to $44.35. The reporting person undertakes to provide Bandwidth Inc. (the \"Company\"), any security holder of the Company, 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 range set forth in this footnote."}],"balance_after":37550,"source":{"system":"sec-edgar","filing":"0000899243-18-022470","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1514416/000089924318022470/doc4.xml","form_type":"4"}},{"id":3856500,"issuer":{"id":350,"kind":"organization","name":"Bandwidth Inc.","symbol":"BAND"},"owners":[{"id":151699,"kind":"person","name":"Kaestner Henry R.","position":1,"cik":"0001721977","reported_name":"Kaestner Henry R.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2018-08-01T20:15:42.000Z","date":"2018-07-30","kind":"sale","acquired":false,"shares":200,"price":36.035,"value":7207.0,"ownership":{"direct":false,"nature":"By AMDG Unitrust No. 2"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $36.03 to $36.04. The reporting person undertakes to provide the Company, any security holder of the Company, 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 range set forth in this footnote."}],"balance_after":28000,"source":{"system":"sec-edgar","filing":"0000899243-18-020970","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1514416/000089924318020970/doc4.xml","form_type":"4"}},{"id":3856499,"issuer":{"id":350,"kind":"organization","name":"Bandwidth Inc.","symbol":"BAND"},"owners":[{"id":151699,"kind":"person","name":"Kaestner Henry R.","position":1,"cik":"0001721977","reported_name":"Kaestner Henry R.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2018-08-01T20:15:42.000Z","date":"2018-07-30","kind":"sale","acquired":false,"shares":3300,"price":35.1808,"value":116096.64,"ownership":{"direct":false,"nature":"By AMDG Unitrust No. 2"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $35.00 to $35.83. The reporting person undertakes to provide the Company, any security holder of the Company, 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 range set forth in this footnote."}],"balance_after":28200,"source":{"system":"sec-edgar","filing":"0000899243-18-020970","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1514416/000089924318020970/doc4.xml","form_type":"4"}},{"id":3856498,"issuer":{"id":350,"kind":"organization","name":"Bandwidth Inc.","symbol":"BAND"},"owners":[{"id":151699,"kind":"person","name":"Kaestner Henry R.","position":1,"cik":"0001721977","reported_name":"Kaestner Henry R.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2018-08-01T20:15:42.000Z","date":"2018-07-30","kind":"sale","acquired":false,"shares":300,"price":36.0833,"value":10824.99,"ownership":{"direct":false,"nature":"By AMDG Unitrust No. 1"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $36.00 to $36.15. The reporting person undertakes to provide the Company, any security holder of the Company, 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 range set forth in this footnote."}],"balance_after":42000,"source":{"system":"sec-edgar","filing":"0000899243-18-020970","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1514416/000089924318020970/doc4.xml","form_type":"4"}},{"id":3856497,"issuer":{"id":350,"kind":"organization","name":"Bandwidth Inc.","symbol":"BAND"},"owners":[{"id":151699,"kind":"person","name":"Kaestner Henry R.","position":1,"cik":"0001721977","reported_name":"Kaestner Henry R.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2018-08-01T20:15:42.000Z","date":"2018-07-30","kind":"sale","acquired":false,"shares":4950,"price":35.1223,"value":173855.385,"ownership":{"direct":false,"nature":"By AMDG Unitrust No. 1"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan."},{"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 $35.00 to $35.46. The reporting person undertakes to provide Bandwidth Inc. (the \"Company\"), any security holder of the Company, 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 range set forth in this footnote."}],"balance_after":42300,"source":{"system":"sec-edgar","filing":"0000899243-18-020970","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1514416/000089924318020970/doc4.xml","form_type":"4"}},{"id":3865035,"issuer":{"id":350,"kind":"organization","name":"Bandwidth Inc.","symbol":"BAND"},"owners":[{"id":151699,"kind":"person","name":"Kaestner Henry R.","position":1,"cik":"0001721977","reported_name":"Kaestner Henry R.","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2018-07-18T20:05:35.000Z","date":"2018-07-16","kind":"sale","acquired":false,"shares":3500,"price":35.0662,"value":122731.7,"ownership":{"direct":false,"nature":"By AMDG Unitrust No. 2"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $35.00 to $35.85. 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