HUNTSVILLE, Ala. -- ADTRAN Holdings, Inc. (NASDAQ: ADTN and FSE: QH9) (“ADTRAN Holdings” or the “Company”) today announced preliminary unaudited revenue, preliminary GAAP and non-GAAP operating margin, and preliminary GAAP and non-GAAP basic and diluted earnings per share for the fiscal quarter ended June 30, 2026.

This press release announcement is being provided due to German ad hoc disclosure requirements following, among others, the Company's performance relative to its previously issued revenue guidance. All figures in this release are preliminary and subject to completion of the Company's quarter-end financial close procedures.

For the second quarter of 2026, preliminary revenue is expected to be in the range of $280.0 million to $282.0 million, which is below the Company’s previously announced guidance range of $283.0 million to $303.0 million.

Preliminary GAAP operating margin for the second quarter of 2026 is expected to be between (3.2)% to (4.0)%. Preliminary non-GAAP operating margin for the second quarter is expected to be between 3.5% to 4.0%, which is below our previously announced guidance range of 5.0% to 9.0%.

The Company currently expects second quarter 2026 preliminary GAAP basic and diluted loss per common share attributable to ADTRAN Holdings, Inc. to be between $(0.12) and $(0.14). The Company currently expects second quarter 2026 preliminary non-GAAP basic and diluted earnings per common share attributable to ADTRAN Holdings, Inc. to be between $0.03 and $0.05.

For the third quarter of 2026, the Company expects revenue to be within a range of $275.0 million to $295.0 million. Non-GAAP operating margin is expected to be within a range of 1.5% to 5.5%.

Tom Stanton, Chairman and Chief Executive Officer, said, “Our preliminary second quarter results were directly impacted by a project delay from a single customer. In addition, margins reflected the current elevated component and freight cost environment. While these factors are affecting our near-term financial results, they do not change the underlying business, customer engagement or strategic priorities we are executing against.”

“Outside of this customer-specific dynamic, we’re encouraged by the continued strength of our optical networking business, the opportunities we’re seeing with customers and end markets, and the innovation pipeline that continues to expand our addressable market,” Stanton concluded. “We look forward to discussing our second quarter results and the opportunities ahead in greater detail when we report full results in two weeks.”