• BlackRock lifted total voting rights stake in ADTRAN Holdings to 11.11% from 11.08%.
• Voting rights held via shares rose to 6.48% from 6.08%, while voting rights through instruments fell to 4.63% from 5.01%.
• Threshold was crossed on May 7, 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_2326482_en), on May 12, 2026, and is solely responsible for the information contained therein.