ADTRAN Holdings, Inc. (NASDAQ:ADTN) announced today that the Company will release its financial results for the first quarter 2023 after market close on Monday, May 8, 2023. The Company will conduct a conference call on Tuesday, May 9, 2023, to discuss the results for the quarter.

What:			ADTRAN Holdings, Inc. Earnings Call
When:			9:30 a.m. Central Time on Tuesday, May 9, 2023
Where:			www.adtran.com/investor

ADTRAN Holdings, Inc. will webcast this conference. To listen, simply visit ADTRAN Holdings, Inc. Investor Relations site at www.adtran.com/investor approximately 10 minutes prior to the start of the call, click on the event "ADTRAN Holdings, Inc. Releases 1st Quarter 2023 Financial Results and Earnings Call", and click on the Webcast link. An online replay of the conference call, as well as the transcript of the call, will be available on the Investor Relations site shortly following the call and will remain available for at least 12 months.

About ADTRAN Holdings, Inc.

ADTRAN Holdings, Inc. is the parent company of ADTRAN, Inc., a wholly owned subsidiary and a leading global provider of open, disaggregated networking and communications solutions. ADTRAN Holdings is also the largest shareholder of ADVA, a European headquartered network innovator that empowers operators to deliver the cloud and mobile services that are vital to today's society.

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ADTRAN Holdings, Inc. to Release First Quarter 2023 Earnings on May 8, 2023