ADTRAN Holdings, Inc. is a global provider of fiber-based networking and communications platforms, software, systems, and services focused on metro optical transport, data center interconnect and broadband access for service providers, enterprises, and government.

# ADTRAN Holdings, Inc.

## Company focus
- Global provider of networking and communications platforms, software, systems, and services.
- Primary focus areas: metro optical transport, data center interconnect, and broadband access.
- Serves a diverse domestic and international customer base, including:
  - Large, medium, and small service providers
  - Alternative service providers (utilities, municipalities, fiber overbuilders)
  - Cable/MSOs
  - SMBs and distributed enterprises (including Fortune 500 companies with business continuity needs)
  - Hyper-scalers, neocloud and content providers, and data center companies
  - Federal, state, and local government agencies

## Strategic positioning
- Seeks to be a leading global supplier of fiber-based communications infrastructure and AI-driven operations, including SaaS applications.
- Provides solutions across the network core, cloud edge (data centers), and subscriber edge (customer premises) for residential and enterprise connectivity, including fiber-based infrastructure for mobile networks.
- Offers a broad portfolio of flexible network infrastructure solutions, customer premises equipment, software applications, and global services and support to help service providers meet current and future service demands.

## Go-to-market and delivery
- Supported by a direct global sales organization and distribution networks.
- Growth strategy emphasizes customer technology adoption, increased unit volumes, and market share gains through new and next-generation products with competitive pricing and enhanced functionality.

## Research and development
- Ongoing R&D to address customer needs, develop new products, and test products for specific customer requirements.

## Corporate structure
- Sole owner of ADTRAN, Inc. and majority shareholder of Adtran Networks.
- ADTRAN, Inc. is described as a leading global provider of open, disaggregated networking and communications solutions.
- Adtran Networks is a global provider of solutions for data, storage, voice, and video services.
- The combined technology portfolio addresses high-speed connectivity from the network core to the end consumer, with emphasis on convergence at the network edge.

## Segments and revenue categories
- Two reportable segments:
  - Network Solutions (hardware and software products)
  - Services & Support (network design and implementation services, support services, and AI-driven operations including cloud-hosted SaaS applications)
- Three revenue categories:
  - Subscriber Solutions
  - Access & Aggregation Solutions
  - Optical Networking Solutions

## Global footprint
- Global headquarters: Huntsville, Alabama (Cummings Research Park)
- Secondary European headquarters: Munich, Germany
- Additional sales and R&D facilities located in strategic global locations
- Mailing address: 901 Explorer Boulevard, Huntsville, Alabama, 35806
- Phone: (800) 923-8726
- Website: www.adtran.com
- Information on the website is not incorporated by reference in this report.

## Corporate events and governance
- Domination and Profit and Loss Transfer Agreement (DPLTA) between the Company (controlling) and Adtran Networks (controlled) executed on December 1, 2022, effective January 16, 2023.
- The DPLTA provides the Company with effective control over Adtran Networks under its terms.
- See Management’s Discussion and Analysis for the section titled “Adtran Networks Domination and Profit and Loss Transfer Agreement.”

ADTRAN Holdings, Inc. is a leading global provider of networking and communications infrastructure, software, systems, and services, focusing on metro optical transport, data center interconnect, broadband access, and fiber-based networks.

# Company Summary: ADTRAN Holdings, Inc.

## Overview
ADTRAN Holdings, Inc. is a leading global provider of networking and communications infrastructure, software, systems, and services. The company focuses on metro optical transport, data center interconnect, broadband access, and fiber-based networks supporting a diverse range of customers worldwide.

## Business Segments
- **Network Solutions:** Hardware and software products for subscriber access, fiber access and aggregation, optical transport, and network synchronization. Examples include fiber termination solutions, Ethernet switches, and SaaS applications like Mosaic One.
- **Services & Support:** Design, deployment, maintenance, and cloud-hosted services including end-to-end network management, professional services, and SaaS applications under the Mosaic One platform.

## Revenue Breakdown
- **Total Revenue (2024):** $922.7 million
  - **Network Solutions:** 80.1% of total revenue
  - **Services & Support:** 19.9% of total revenue
- **Revenue Trends:**
  - Revenue declined 19.7% year-over-year from 2023 to 2024 due to customer inventory reductions and macroeconomic conditions.
  - Domestic revenue in 2024 was $398.2 million.
  - International revenue was $524.6 million (56.8% of total), down 23.8% from 2023.

## Customers
- In 2024, **one customer** accounted for more than 10% of total revenue, an international Service Provider.
- The top 5 largest customers (including the one over 10%) made up approximately **21.7%** of revenue.
- Revenue also heavily relies on customers in the U.S., U.K., and Germany.

## Employees
- **Total Employees:** 3,234 (as of December 31, 2024)
  - **Full-Time Employees:** 3,091
  - **Part-Time Employees:** 143
- **International Presence:** Employees in North America, Latin America, EMEA, and APAC regions.
- **Employee Diversity:** 
  - 76% of Adtran GmbH (Germany) employees are under collective bargaining agreements.
  - 94 employees are based in Switzerland, France, Italy, Finland, and Spain.
  - The company emphasizes diversity, equity, and inclusion.

## Financial Highlights
- **Net Loss (2024):** 49.8% of revenue
- **Adjusted for restatements**, the company experienced significant impairments, including a **$297.4 million** non-cash goodwill impairment in March 2024 for its Network Solutions segment.
- The company has high leverage with **$189.6 million** in borrowings as of December 31, 2024, primarily under a credit facility maturing in July 2027.
- The company suspended quarterly dividends since November 2023 as part of debt and cost-reduction efforts.

## Operational Focus
The company develops and offers a broad portfolio of fiber and broadband infrastructure solutions supporting the transition to converged, high-capacity, fiber-based networks. It focuses on innovation, expanding into high-speed connectivity markets including 5G, data center interconnects, and enterprise solutions.

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*This summary presents a detailed, factual overview of ADTRAN Holdings, Inc. based solely on the provided information.*

ADTRAN Holdings, Inc.

10-K / February 26, 2026

10-K / May 20, 2025

10-K / February 26, 2026

ADTRAN Holdings, Inc.

Company focus

Strategic positioning

Go-to-market and delivery

Research and development

Corporate structure

Segments and revenue categories

Global footprint

Corporate events and governance