<SEC-DOCUMENT>0001193125-20-104870-index.html : 20200413 <SEC-HEADER>0001193125-20-104870.hdr.sgml : 20200413 <ACCEPTANCE-DATETIME>20200413084732 ACCESSION NUMBER: 0001193125-20-104870 CONFORMED SUBMISSION TYPE: DEFA14A PUBLIC DOCUMENT COUNT: 3 FILED AS OF DATE: 20200413 DATE AS OF CHANGE: 20200413 EFFECTIVENESS DATE: 20200413 FILER: COMPANY DATA: COMPANY CONFORMED NAME: ADTRAN INC CENTRAL INDEX KEY: 0000926282 STANDARD INDUSTRIAL CLASSIFICATION: TELEPHONE & TELEGRAPH APPARATUS [3661] IRS NUMBER: 630918200 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: DEFA14A SEC ACT: 1934 Act SEC FILE NUMBER: 000-24612 FILM NUMBER: 20787893 BUSINESS ADDRESS: STREET 1: 901 EXPLORER BLVD CITY: HUNTSVILLE STATE: AL ZIP: 35806 BUSINESS PHONE: 256-963-8220 MAIL ADDRESS: STREET 1: 901 EXPLORER BLVD CITY: HUNTSVILLE STATE: AL ZIP: 35806 </SEC-HEADER> <DOCUMENT> <TYPE>DEFA14A <SEQUENCE>1 <FILENAME>d912188ddefa14a.htm <DESCRIPTION>DEFA14A <TEXT> Document 1 - file: d912188ddefa14a.htm
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