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ADTRAN Holdings, Inc. — Investor Relations & Filings

Ticker · ADTN ISIN · US00486H1059 LEI · 549300XWTHXJVGKWU616 F Manufacturing
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Filings indexed 2,237 across all filing types
Latest filing 2026-04-01 Report Publication Anno…
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
Release according to Article 50 of the WpHG [the German Securities Trading Act] with the objective of Europe-wide distribution
Report Publication Announcement Classification · 1% confidence The document is a short, third-country press release under Article 50 of the German Securities Trading Act notifying investors that Adtran Holdings, Inc. has filed proxy statements (DEF 14A, DEFA 14A) and its annual report with the SEC and providing links to those filings. It does not contain any substantive financial or management content itself but rather announces the publication of these filings. Therefore, it is a Report Publication Announcement (RPA).
2026-04-01 English
ADTRAN Holdings Inc.: Bekanntmachung der Einberufung zur Hauptversammlung am 13.05.2026 in www.virtualshareholdermeeting.com/ADTN2026 mit dem Ziel der europaweiten Verbreitung gema 121 AktG
Proxy Solicitation & Information Statement Classification · 1% confidence The document is a formal notice convening the Annual Meeting of Stockholders on May 13, 2026, listing agenda items, board recommendations, proxy voting instructions and reference to the proxy statement. It is clearly a proxy solicitation/information mailing rather than the full annual report or earnings release. This matches the description for Proxy Solicitation & Information Statement (Code: PSI).
2026-04-01 English
Major Shareholding Notification 2026
Major Shareholding Notification Classification · 1% confidence The document is a ‘Notification of Major Holdings’ under Article 40, Section 1 of the German Securities Trading Act (WpHG). It details the crossing of voting‐rights thresholds, the parties involved, and percentages held—characteristic of a major shareholding notification. This aligns directly with Filing Definition #20: Major Shareholding Notification (Code: MRQ).
2026-03-31 English
Major Shareholding Notification 2026
Major Shareholding Notification Classification · 1% confidence The document is a formal Voting Rights Announcement under Article 40 of the German Securities Trading Act (WpHG) notifying a major shareholding (Goldman Sachs crossing 10% total voting rights via instruments and shares). It provides details of thresholds crossed, percentages of voting rights, and chain of controlled undertakings. This matches the Major Shareholding Notification category.
2026-03-27 English
ARS - ADTRAN Holdings, Inc. (0000926282) (Filer)
Annual Report
2026-03-27 English
DEFA14A - ADTRAN Holdings, Inc. (0000926282) (Filer)
Regulatory Filings
2026-03-27 English

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