• BlackRock cut its total voting rights stake in Adtran to 11.09% from 12.43%.
• Holdings through shares fell to 6.3% from 7.68%.
• Voting rights through instruments edged up to 4.78% from 4.75%.
• The threshold was crossed on May 13, 2026.

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: PVR_2329400_en), on May 18, 2026, and is solely responsible for the information contained therein.