<SEC-DOCUMENT>0001564590-18-006409-index.html : 20180321 <SEC-HEADER>0001564590-18-006409.hdr.sgml : 20180321 <ACCEPTANCE-DATETIME>20180321143115 ACCESSION NUMBER: 0001564590-18-006409 CONFORMED SUBMISSION TYPE: 8-K PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20180320 ITEM INFORMATION: Other Events ITEM INFORMATION: Financial Statements and Exhibits FILED AS OF DATE: 20180321 DATE AS OF CHANGE: 20180321 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: 8-K SEC ACT: 1934 Act SEC FILE NUMBER: 000-24612 FILM NUMBER: 18704225 BUSINESS ADDRESS: STREET 1: 901 EXPLORER BLVD CITY: HUNTSVILLE STATE: AL ZIP: 35806 BUSINESS PHONE: 2569638220 MAIL ADDRESS: STREET 1: 901 EXPLORER BLVD CITY: HUNTSVILLE STATE: AL ZIP: 35806 </SEC-HEADER> <DOCUMENT> <TYPE>8-K <SEQUENCE>1 <FILENAME>adtn-8k_20180320.htm <DESCRIPTION>8-K - SUMITOMO ACQUISITION <TEXT> Document 1 - file: adtn-8k_20180320.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-99.1 <SEQUENCE>2 <FILENAME>adtn-ex991_6.htm <DESCRIPTION>EX-99.1 <TEXT> Document 2 - file: adtn-ex991_6.htm
</DOCUMENT> </SEC-DOCUMENT>