ADTRAN Holdings, Inc.
For the period ended Dec 31, 2025. Filed Feb 26, 2026.
View on SEC.govAbout this filing
A company's yearly report to the SEC, with audited financial statements. It is the fullest account a company gives of its business, its finances and the risks it sees.
FY2025 · Filed Feb 26, 2026
ADTN$4.29+6.2%Stored close · as of Nov 9, 2026
Extracted filing text, with the paragraph anchors used by the comparison.
See the whole filing, with its images and exhibitsContents
Glossary of Selected Terms
Below are certain acronyms, concepts and defined terms commonly used in our industry and in this report along with their meanings:
| Acronym/Concept/Defined Term | Meaning |
|---|---|
| ACI-E | Access Integrator Ethernet |
| Adtran Networks | Adtran Networks SE, a European stock corporation incorporated under the laws of the EU and Germany, and a majority-owned subsidiary of the Company |
| Adtran GmbH | Adtran Gesellschaft mit beschränkter Haftung; Limited liability subsidiary of Adtran, Inc. in Germany |
| ALM | Active line monitoring |
| AI | Artificial Intelligence |
| AOE | Adtran Operational Environment (Adtran EMS) |
| APAC | Asia Pacific |
| ASU | Accounting Standards Update |
| ATIS | Alliance for Telecommunications Industry Solutions; Standards organization that develops technical and operational standards and solutions for the information and technology industry |
| BBF | Broadband Forum |
| Carrier | Entity that provides voice, data or video services to consumers and businesses |
| CBAM | Carbon Border Adjustment Mechanism |
| COSO | Committee of Sponsoring Organizations of the Treadway Commission |
| CPE | Customer-Premises Equipment |
| CSRD | Corporate Sustainability Reporting Directive |
| C-TPAT | U.S. Customs Trade Partnership Against Terrorism |
| DPLTA | Domination and Profit and Loss Transfer Agreement |
| DPU | Distribution Point Unit |
| DSL | Digital Subscriber Line |
| DSO | Days Sales Outstanding |
| EMEA | Europe, Middle East and Africa |
| EPON | Ethernet PON |
| ESPR | Environmentally Sustainable Products Regulation |
| Ethernet | Means of connecting computers over a LAN (as defined below) |
| ETSI | European Telecommunications Standards Institute |
| EU | European Union |
| FCPA | Foreign Corrupt Practices Act |
| FOB | Free on Board |
| FTTN | Fiber to the Node |
| GDPR | General Data Protection Regulation |
| Gfast | DSL protocol standard for local loops (telephone lines) shorter than 500 meters with performance targets between 100 Mbps (as defined below) and 1 gigabit per second, depending on loop length |
| GILTI | Global Intangible Low-Taxed Income is a U.S. tax provision (IRC §951A) under the 2017 Tax Cuts and Jobs Act |
| GPON | Gigabit PON |
| hiX | Adtran Multiservice Access Platform sold in the EU |
| Hyper-scalers | Major cloud service providers operating massive, scalable data centers |
| ICT | Information and Communications Technology |
| IoT | Internet of Things |
|---|---|
| IP | Internet Protocol |
| ISDA | International Swaps and Derivatives Association |
| ISO | International Organization for Standardization |
| ITU-T | International Telecommunication Union – Telecommunication Standardization Sector |
| LAN | Local Area Network |
| Mbps | Megabits Per Second |
| MDU Connectivity | Managed, high-speed fiber or Wi-Fi systems for multi-dwelling units |
| MEF | Metro Ethernet Forum |
| MSO | Multiple System Operator |
| MSP | Managed Service Provider |
| NASDAQ | National Association of Securities Dealers Automated Quotations, an American stock exchange based in New York City |
| Neocloud | Cloud providers specialized in providing GPU-as-a-Service for AI, machine learning, and high-performance computing |
| Net CFC Tested Income | Net controlled foreign corporations tested income, under IRC §951A, is the aggregate of a U.S. shareholder's pro rata share of tested income from controlled foreign corporations, reduced by their share of tested losses |
| ODM | Original Design Manufacturer |
| OLT | Optical Line Terminal |
| ONE | Optical Networking Edge |
| ONT | Optical Network Terminal |
| Operator | Entity that provides voice, data or video services to consumers and businesses |
| OS | Operating System |
| OTT | Over the Top |
| PCAOB | Public Company Accounting Oversight Board |
| PON | Passive Optical Network |
| PSU | Performance Stock Unit |
| RNCI | Redeemable Non-Controlling Interest |
| RSU | Restricted Stock Unit |
| SaaS | Software-as-a-Service |
| SDG | Service Delivery Gateway |
| SDN | Software Defined Networking |
| SDX | Software Defined Everything |
| SDO | Standards Developing Organizations |
| SEC | Securities and Exchange Commission |
| Service Provider or SP | An entity that provides voice, data or video services to consumers and businesses |
| SLA | Service Level Agreement |
| SMB | Small- to Medium-sized Business |
| SOFR | Secured Overnight Financing Rate |
| System Integrator or SI | Person or company that specializes in bringing together component subsystems into a whole and ensuring that those subsystems function together |
| TIA | Telecommunications Industry Association |
| TIP | Telecom Infra-Project |
| TL 9000 | Standard developed by and for the ICT industry to drive consistency in the quality of products and services down the supply chain through the implementation of a common body of QMS requirements and defined performance-based measurements |
|---|---|
| U.K. | United Kingdom |
| U.S. | United States |
| VAR | Value-Added Reseller |
| VoIP | Voice over IP |
| WEEE | Waste from Electrical and Electronic Equipment directive |
| Wi-Fi | Family of wireless network protocols, based on the IEEE 802.11 family of standards, which are commonly used for LAN of devices and Internet access |
| XGS-PON | Updated standard for PONs that can support 10 Gbps symmetrical data transfer |
The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.