 HUNTSVILLE, Ala--BUSINESS WIRE--ADTRAN, Inc., NASDAQ: ADTN today announced that it will hold a special meeting of its stockholders Special Meeting on January 6, 2022, to adopt the Business Combination Agreement, dated as of August 30, 2021, by and among ADTRAN, Inc., Acorn HoldCo, Inc., Acorn MergeCo, Inc., and ADVA Optical Networking SE, pursuant to which, among other things, ADTRAN, Inc. and ADVA Optical Networking SE agreed to combine their businesses through a merger and an exchange 