ADTRAN Holdings, Inc.
ADTRAN Holdings, Inc. (NASDAQ: ADTN) is a leading global provider of networking and communications platforms, software, systems and services focused on metro optical transport, data center interconnect, and broadband access markets. The company serves a diverse international customer base including large and medium… From the company’s description.
Margins and return on equity change in ; everything else in percent. Fewer shares and less debt are shown plainly, not as bad news — it depends what you make of buybacks. Dotted labels explain each measure. is shown separately from the annual figures.
What ADTRAN Holdings, Inc. does
In the company’s own words
ADTRAN Holdings, Inc. (NASDAQ: ADTN) is a leading global provider of networking and communications platforms, software, systems and services focused on metro optical transport, data center interconnect, and broadband access markets. The company serves a diverse international customer base including large and medium service providers, alternative service providers such as utilities and municipalities, cable operators, small-to-medium businesses, enterprises, hyper-scalers, neocloud providers, content providers, data center companies, and government agencies. The company website is www.adtran.com.
ADTRAN operates through two reportable segments: Network Solutions, which encompasses hardware and software products enabling digital infrastructure, and Services & Support, which includes network design, implementation, maintenance, and cloud-hosted SaaS applications featuring AI-driven operations. The company's revenue spans three primary categories: Subscriber Solutions for terminating access services at customer premises; Access & Aggregation Solutions for connecting subscribers and mobile networks to metro networks; and Optical Networking Solutions for interconnecting metro and regional networks over fiber.
The company's product portfolio includes residential gateways, optical networking terminals, enterprise connectivity solutions, optical line terminals, copper access platforms, packet aggregation systems, optical transport equipment, and network management software. The Mosaic One platform represents the company's suite of cloud-hosted SaaS applications providing end-to-end network and service optimization with AI capabilities.
ADTRAN solely owns ADTRAN, Inc. and maintains majority ownership of Adtran Networks SE, a European stock corporation. The company maintains global headquarters in Huntsville, Alabama, with European headquarters in Munich, Germany, and research and development facilities across the United States, Europe, Israel, and Asia. The company invests substantially in research and development to maintain competitive positioning in rapidly evolving telecommunications markets, with annual R&D expenditures exceeding $200 million.
The company competes with established telecommunications equipment manufacturers including Nokia, Ciena, Calix, and others across its various product categories. ADTRAN's strategy emphasizes fiber networking leadership, growth in focus markets, investment in converged edge technologies, software-driven transformation, customer diversification, and sustainability commitments.
Company details
- Sector
- Technology
- Industry
- Electronic Equipment
- Headquarters
- HUNTSVILLE, AL
- Fiscal year end
- December
- CIK
- 926282
- SIC
- 3661
Financial performance, year by year
Fiscal 2013–2025 · USDThe full income statement, balance sheet and cash flow for each of these years — every figure traceable to its filing — is on the Financials tab with a free account.
Who owns ADTRAN Holdings, Inc. — and what changed
Funds as of 2026Q2 · superinvestors as of 2026-06-30
Superinvestors in ADTRAN Holdings, Inc. · what they did last quarter
Share of each manager’s reported 13F portfolio. Change is in shares held, since the previous quarter.
Largest fund holders · ADTRAN Holdings, Inc.’s weight in each
Fund ownership is a floor, not a census — pensions, insurers and people holding shares directly are not visible here.
Fund ownership counts N-PORT filers only, so it is a floor rather than a census — pensions, insurers and direct holders are not visible here, and the remainder is not “held by individuals”.
Fund ownership is a subset of institutional 13F ownership — the two describe overlapping populations and must not be added together.
Could not be determined for this company: bond issues.
Every fund and institutional holder, quarter by quarter, is on the Ownership tab with a free account.
Recent filings
All filings →Each filing opens into its own statements and disclosures here.
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