ADTRAN Holdings, Inc. Investigation Initiated: Levi & Korsinsky Investigates the Officers and Directors of ADTRAN Holdings, Inc. (ADTN)

NEW YORK CITY, NY / ACCESS Newswire / July 27, 2026 / Levi & Korsinsky notifies investors that it has commenced an investigation into ADTRAN Holdings, Inc. ("ADTRAN Holdings, Inc.") (NASDAQ:ADTN) concerning potential violations of the federal securities laws.

ADTRAN Holdings shares shares fell approximately 15% on July 22, 2026 after the company announced preliminary unaudited Q2 2026 revenue of $280 million to $282 million and non-GAAP operating margin of about 3.5% to 4.0%, both below its guidance of $283 million to $303 million in revenue and 5% to 9% non-GAAP operating margin.

On the Q1 2026 call, CFO Timothy Santo stated: "We expect revenue to be between $283 million and $303 million, and non-GAAP operating margin within a range of 5% to 9%." The preliminary figures placed revenue $1 million to $23 million below that range and operating margin at least 100 basis points below the bottom of the stated range.

An investor presentation attached to a May 5, 2026 Form 8-K reported revenue of $286.1 million, up 15.5% year-over-year and within prior guidance of $275 million to $295 million. The preliminary Q2 revenue range of $280 million to $282 million was approximately $4.1 million to $6.1 million below analyst consensus estimate.

If you suffered a loss on your ADTRAN Holdings, Inc. securities and would like to explore a potential recovery under the federal securities laws, Learn More About the Investigation or contact Joseph E. Levi, Esq. via email at [email protected] or call (212)363-7500 to speak to our team of experienced shareholder advocates.

WHY LEVI & KORSINSKY: Over the past 20 years, Levi & Korsinsky LLP has established itself as a nationally-recognized securities litigation firm that has secured hundreds of millions of dollars for aggrieved shareholders and built a track record of winning high-stakes cases. The firm has extensive expertise representing investors in complex securities litigation and a team of over 70 employees to serve our clients. For seven years in a row, Levi & Korsinsky has ranked in ISS Securities Class Action Services' Top 50 Report as one of the top securities litigation firms in the United States. Attorney Advertising. Prior results do not guarantee similar outcomes.

CONTACT:

Levi & Korsinsky, LLP

Joseph E. Levi, Esq.

Ed Korsinsky, Esq.

33 Whitehall Street, 27th Floor

New York, NY 10004

[email protected]

Tel: (212)363-7500

Fax: (212)363-7171

SOURCE: Levi & Korsinsky, LLP