Glancy Prongay & Murray LLP Continues Its Investigation on Behalf of ADTRAN, Inc. Investors

Glancy Prongay & Murray LLP ("GPM") continues its investigation on behalf of ADTRAN, Inc.("ADTRAN" or the "Company") ADTN investors concerning the Company and its officers' possible violations of federal securities laws.

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On July 17, 2019, the Company announced "preliminary" earnings for second quarter 2019 due to its ongoing assessment of the reasonableness of its current and previously reported excess and obsolete inventory reserves ("E&O reserves").

On this news, the Company's share price fell $3.69 per share, over 23%, to close at $12.13 per share on July 18, 2019, thereby injuring investors.

Then, on August 12, 2019, the Company disclosed that it would be unable to timely file its quarterly financial report with the SEC. Moreover, the Company disclosed that certain material weaknesses in its internal control resulted in a misstatement of previously reported E&O reserves.

Then, on September 20, 2019, the Company filed its quarterly report for the period ended June 30, 2019 with the SEC and disclosed a $0.8 million out-of-period adjustment, which increased its E&O reserves for the period.

If you purchased ADTRAN securities, have information or would like to learn more about these claims, or have any questions concerning this announcement or your rights or interests with respect to these matters, please contact Lesley F. Portnoy, Esquire, of GPM, 1925 Century Park East, Suite 2100, Los Angeles, California 90067 at 310-201-9150, Toll-Free at 888-773-9224, by email to shareholders@glancylaw.com, or visit our website at www.glancylaw.com. If you inquire by email please include your mailing address, telephone number and number of shares purchased.

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