 NEW YORK, Aug. 30, 2021 PRNewswire -- WeissLaw LLP is investigating possible breaches of fiduciary duty and other violations of law by the board of directors of ADTRAN, Inc. ADTRAN or the Company NASDAQ: ADTN in connection with the proposed acquisition of the Company by ADVA ADVA FSE: ADV. ADTRAN and ADVA will combine under a new holding company which will be renamed ADTRAN Holdings, Inc. following the closing pursuant to an all-stock exchange offer for 100 of ADVAs outstanding shares. 