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ADTRAN Holdings, Inc. — Investor Relations & Filings

Ticker · ADTN ISIN · US00486H1059 LEI · 549300XWTHXJVGKWU616 F Manufacturing
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Filings indexed 2,261 across all filing types
Latest filing 2026-06-01 Major Shareholding Noti…
Country US United States of America
Listing F ADTN

About ADTRAN Holdings, Inc.

https://www.adtran.com/

ADTRAN Holdings, Inc. is a global provider of open, disaggregated networking and communications solutions. The company's portfolio includes hardware, software, and services designed for telecommunication service providers and other network operators. Its offerings encompass fiber broadband access, access and aggregation technologies, and open optical networking systems. These solutions enable the delivery of voice, data, video, and high-speed internet services to residential and business customers. ADTRAN also develops AI-powered software platforms, such as Mosaic One, to simplify network operations and management, providing end-to-end visibility and control from the network core to the subscriber premises.

Recent filings

Filing Released Lang Actions
Major Shareholding Notification 2026
Major Shareholding Notification Classification · 91% confidence The document is a public notification under the German Securities Trading Act (WpHG) detailing the crossing of shareholding thresholds by BlackRock, Inc. in Adtran Holdings, Inc. It provides precise percentages of voting rights attached to shares and instruments and the date the threshold was crossed, which is characteristic of a Major Shareholding Notification. This matches the MRQ category for significant share ownership notifications.
2026-06-01 English
Release according to Article 41 of the WpHG [the German Securities Trading Act] with the objective of Europe-wide distribution
Declaration of Voting Results & Voting Rights Announcements Classification · 92% confidence The document is a “Total Voting Rights Announcement” under Article 41 of the German Securities Trading Act (WpHG), disclosing the new total number of voting rights. This matches the definition for “Declaration of Voting Results & Voting Rights Announcements” (DVA).
2026-05-31 English
Major Shareholding Notification 2026
Major Shareholding Notification Classification · 92% confidence The document is an announcement under Article 40 of Germany’s Securities Trading Act (WpHG) detailing the notification of a major holdings change by BlackRock in Adtran Holdings, including thresholds crossed, percentages of voting rights held directly and via instruments. This clearly matches the definition of a Major Shareholding Notification (code MRQ).
2026-05-29 English
Adtran Holdings, Inc.: Christoph Glingener, Acquisition of 1,906 shares in ADTRAN Holdings, Inc. (ISIN US00486H1059) due to the vesting of 1,906 Restricted Stock Units (granted May 24, 2023) pursuant
Director's Dealing Classification · 95% confidence The document is a notification of an insider transaction by a person discharging managerial responsibilities (Christoph Glingener, CTO), detailing acquisition of shares due to RSU vesting, with ISIN, volume, price, date, and place. This clearly matches a Director’s Dealing report (insider share transaction).
2026-05-29 English
Major Shareholding Notification 2026
Major Shareholding Notification Classification · 95% confidence The document is a detailed Notification of Major Holdings under Article 40 of the WpHG, recording crossing of voting rights thresholds and detailing shareholdings and instruments. This matches the Major Shareholding Notification category (Code: MRQ).
2026-05-27 English
Major Shareholding Notification 2026
Major Shareholding Notification Classification · 95% confidence The document is a voting rights announcement under Article 40 of the German Securities Trading Act, providing details of BlackRock’s acquisition/disposal of shares and instruments and the crossing of a 3% threshold. It is a notification of major holdings (change in significant share ownership levels), which falls under Major Shareholding Notification (MRQ).
2026-05-26 English

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