April 27, 2015 (Shareholders Foundation) - An investigation on behalf of investors of ADTRAN, Inc. (NASDAQ:ADTN) shares over potential securities laws violations by ADTRAN, Inc. and certain of its directors and officers in connection certain financial statements was announced.

The investigation by a law firm focuses on possible claims on behalf of purchasers of the securities of ADTRAN, Inc. (NASDAQ:ADTN) concerning whether a series of statements by ADTRAN, Inc. regarding its business, its prospects and its operations were materially false and misleading at the time they were made.

ADTRAN, Inc. reported that its annual Total Revenue delinked from $640.89 million in 2013 to $629.41 million in 2014 and that its respective Net Income decreased from $45.79 million to $44.62 million.

Shares of ADTRAN, Inc. (NASDAQ:ADTN) declined from $27.02 per share in late 2013 to as low as $18.33 per share in March 2015.

On April 21, 2015, ADTRAN, Inc. reported its results for the first quarter 2015. Accordingly, ADTRAN, Inc reported lower than expected earnings for Q1 2015, attributed to both European currency fluctuations and also to the cancellation of the large Tier 1 project that was slated to commence late in Q1 2015. Shares of ADTRAN, Inc. (NASDAQ:ADTN) declined to $15.67 per share on April 23, 2015.