• ADTRAN Chief Technology Officer Christoph Glingener sold 126,115 shares.
• Sale executed May 7, 2026 on Nasdaq.
• Shares sold at multiple prices around USD 14.73 to USD 15.69.
• Total proceeds amounted to USD 1.89 million at an average price of USD 14.95.

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_104864_de), on May 13, 2026, and is solely responsible for the information contained therein.