• UBS Group raised its combined voting rights stake in ADTRAN to 5% from 4.88% on Aug. 24, 2026.
• Voting rights tied to shares increased to 1.31% from 1.12%.
• Voting rights through instruments edged down to 3.69% from 3.75%.

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 (Ref. ID: PVR_2389328_en) on August 26, 2026, and is solely responsible for the information contained therein.