• ADTRAN Holdings CTO Christoph Glingener purchased 126,115 shares via exercise of stock options under the 2015 Employee Stock Incentive Plan.
• Transaction involved shares priced at USD 7.01 for USD 288,952.20 of stock.
• Additional shares priced at USD 12.17 for USD 1.03 million of stock.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. ADTRAN Holdings Inc. published the original content used to generate this news brief via EQS News, a service of EQS Group AG (Ref. ID: dd_104818_de), on May 13, 2026, and is solely responsible for the information contained therein.