Adtran Holdings, Inc.

Company Overview

Business Model: ADTRAN Holdings, Inc. is a leading global provider of networking and communications platforms, software, systems, and services. The Company focuses on the metro optical transport, data center interconnect, and broadband access markets, serving a diverse domestic and international customer base. Its core value proposition is to be a top global supplier of fiber-based communications infrastructure and AI-driven operations, including Software-as-a-Service (SaaS) applications, spanning from the network core to the cloud edge and subscriber edge. Revenue is generated through a broad portfolio of flexible network infrastructure solutions, customer premises equipment, software applications, and global services and support, enabling Service Providers to meet current and future service demands. The Company's strategy involves increasing unit volume and market share through the introduction of new products and succeeding generations of products with optimal selling prices and increased functionality.

Market Position: ADTRAN Holdings, Inc. positions itself as a leading global provider and a top global supplier in its target markets. It offers one of the most comprehensive solutions portfolios, empowering operators to build a converged infrastructure from the metro core to the customer premise for residential, business, wholesale, and mobile users. Key competitive factors include differentiated feature functionality, price performance, product quality and reliability, financial stability, supply chain management, innovation, technology roadmap, industry thought leadership, time to market, country of origin/trusted supplier status, security of the enterprise value chain, energy consumption and sustainability, customer relationships, and the ability to deliver comprehensive, highly automated solutions. The Company competes with entities such as Calix, Ciena, Nokia, eero, RAD, Asian Original Design Manufacturers (ODMs), Vecima, Harmonic, Microchip, Cisco, Ekinops, Smartoptics, and Ribbon Communications, and less often with Huawei and ZTE Corporation.

Recent Strategic Developments: The Company's strategy is centered on providing innovative and cost-effective solutions by focusing on technology transformations in broadband network infrastructure, home and business Customer Premises Equipment (CPE), software platforms, and services. It aims to be an innovation leader in the converged edge, enabling an intelligent, self-optimizing, fiber-everywhere future. Key strategic elements include leadership in fiber networking, growth in focus markets (especially North America and EMEA), investment in the converged edge (optics, security, AI-driven networking, virtualization, SaaS), transformation through software, diversification of customers, and a strong focus on sustainability. In 2025, ADTRAN Holdings, Inc. launched an auto-tunable 50G C-band pluggable transceiver, expanded its Wi-Fi 7 portfolio with the SDG 9000 Series, and introduced the new FSP 3000 OLS solution. It also continued to advance its software and AI strategy through the Mosaic One platform. The Business Efficiency Program, initiated in Q4 2023 to optimize assets, business processes, and IT systems, was completed as of December 31, 2024.

Geographic Footprint: ADTRAN Holdings, Inc. serves a global customer base across multiple countries. Its global headquarters are in Huntsville, Alabama, U.S., with European headquarters in Munich, Germany. The Company maintains sales and research and development facilities in strategic global locations, including the U.S., Europe, Israel, and Asia. International sales represented 55.6% of total net revenue in 2025, a slight decrease from 56.8% in 2024. In 2025, the U.S. accounted for $480.8 million of revenue, the U.K. for $213.1 million, and Germany for $129.7 million, with each of these countries comprising more than 10% of total revenue. Other international regions contributed $260.2 million.

Financial Performance

Revenue Analysis

Profitability Metrics:

• Gross Margin: 38.3%
• Operating Margin: -1.4%
• Net Margin: -4.2%

Investment in Growth:

• R&D Expenditure: $204.3 million (18.8% of revenue)
• Capital Expenditures: $69.3 million
• Strategic Investments:
  • Issued $201.3 million aggregate principal amount of 3.75% convertible senior notes due 2030.
  • Entered into privately negotiated capped call transactions for approximately $17.6 million.
  • Acquired $38.8 million of developed technology assets in 2025.

Business Segment Analysis

Network Solutions

Financial Performance:

• Revenue: $896.9 million (+21.4% YoY)
• Gross Margin: 34.0%
• Key Growth Drivers: The increase in revenue was primarily driven by increased sales volume due to a return to normalized customer spending, growth from fiber expansion fueled by higher service provider spending, vendor consolidation, a continuing shift away from high-risk vendors, and increased demand for modernizing critical infrastructure across governments, utilities, large enterprises, and bandwidth-hungry applications including AI. The segment also benefited from a decrease in restructuring expense and labor costs as a percentage of revenue following the Business Efficiency Program, and favorable changes in customer and product mix.

Product Portfolio:

• Major product lines and services within this segment include hardware and software products that support Subscriber, Access and Aggregation, and Optical Networking Solutions.
• Optical Networking Solutions products: FSP 3000, AOE Coherent Pluggables, ALM Fiber Monitor, and Mosaic Network Controller.
• Subscriber Solutions products: Residential Gateways, Optical Networking Terminals (GPON, XGS-PON), Enterprise Connectivity (Routers, Switches), Edge Compute (VEC), Carrier Ethernet Network Interface Devices, and Mosaic One SaaS applications.
• Access & Aggregation Solutions products: Optical Line Terminals (TA5000 OLT, SDX OLT), Copper Access (Gfast DPUs, hiX, Total Access), Packet Aggregation (FSF 150-XG400 Aggregator), and Oscilloquartz (Cesium clocks, GNSS and L-band), MCP, AOE and ACI-E, Ensemble.

Market Dynamics: The Network Solutions segment primarily serves Service Providers, SMBs, distributed enterprises, hyper-scalers, neocloud and content providers, data center companies, and government agencies. Its performance is influenced by the global trend towards deploying more robust broadband speeds and access, as well as customer decisions regarding new technology installations, network expansion, and upgrades within their respective regulatory and political environments.

Services & Support

Financial Performance:

• Revenue: $186.9 million (+1.7% YoY)
• Gross Margin: 59.0%
• Key Growth Drivers: The modest increase in revenue was primarily attributable to an $8.1 million increase in revenue from Optical Networking Solutions services. This growth was partially offset by decreases in revenue from Access & Aggregation Solutions services and Subscriber Solutions services. The segment's gross margins are subject to variability based on the mix of services provided, with network planning and implementation services typically having lower gross margins compared to maintenance and support services due to their infrastructure and labor-intensive nature.

Product Portfolio:

• The segment offers a comprehensive portfolio of network design, implementation, maintenance, and cloud-hosted services.
• These services support the Company's Subscriber, Access and Aggregation, and Optical Networking Solutions.
• Cloud-hosted services include a suite of SaaS applications under the Mosaic One platform, which provides end-to-end network and service optimization for fiber access infrastructure and mesh Wi-Fi connectivity, featuring AI-driven operations.
• The Company provides global support through on-site and off-site services with varying Service Level Agreements (SLAs).
• Services: Build, Care, Training, and Professional Services.

Market Dynamics: The Services & Support segment assists operators in deploying multi-vendor networks and reducing their maintenance costs. It benefits from the ongoing transition to web-scale architectures and helps customers monetize their network investments.

Capital Allocation Strategy

Shareholder Returns:

• Share Repurchases: ADTRAN Holdings, Inc. did not repurchase any shares of common stock during the year ended December 31, 2025, and there is no current authorization for share repurchases.
• Dividend Payments: No dividend payments were made in 2025. The Company suspended quarterly dividend payments in 2023.
• Future Capital Return Commitments: No specific future capital return commitments were disclosed.

Balance Sheet Position:

• Cash and Equivalents: $95.7 million as of December 31, 2025.
• Total Debt: $218.0 million as of December 31, 2025, comprising $25.0 million from the revolving credit agreement and $193.0 million (net of discount) from convertible senior notes.
• Net Cash Position: $(122.3) million (net debt position).
• Debt Maturity Profile:
  • The Wells Fargo Credit Agreement matures in July 2027, with $25.0 million outstanding.
  • The 3.75% convertible senior notes, with a principal amount of $201.3 million, mature on September 15, 2030.

Cash Flow Generation:

• Operating Cash Flow: $129.8 million for the year ended December 31, 2025.
• Free Cash Flow: $60.6 million for the year ended December 31, 2025.
• Cash Conversion Metrics:
  • Quarterly accounts receivable Days Sales Outstanding (DSO) decreased from 67 days as of December 31, 2024, to 66 days as of December 31, 2025.
  • Annual inventory turnover increased from 1.92 turns as of December 31, 2024, to 2.80 turns as of December 31, 2025.
  • Inventory decreased by 17.5% from $261.6 million in 2024 to $215.7 million in 2025, attributed to working capital improvements from the Business Efficiency Program, reduced component purchases due to improved lead times, and utilization of buffer stock.

Operational Excellence

Production & Service Model: ADTRAN Holdings, Inc.'s manufacturing process involves the purchase and management of materials, assembly, testing, final inspection, packing, and shipping. The Company sources parts and components globally. It manufactures lower-volume, higher-mix products and builds/tests prototypes at its Huntsville, Alabama facility, while transferring higher-volume, lower-mix assemblies to subcontractors. The service model offers a comprehensive portfolio of network design, implementation, maintenance, and cloud-hosted services, supported by a global organization providing on-site and off-site support.

Supply Chain Architecture: Key Suppliers & Partners: The Company relies heavily on subcontractors for the assembly and testing of printed circuit board assemblies, sub-assemblies, chassis, enclosures, and equipment shelves, as well as for the purchase of some raw materials. Certain key components are available from single or limited sources. Risks are managed through developing alternative sources, staging inventories, engineering efforts to reduce component dependency, and building long-term supplier relationships. The Company has experienced increased costs on imports of critical raw minerals and derivative products due to tariffs. To mitigate this, ADTRAN Holdings, Inc. is diversifying its supply chain and manufacturing locations. Starting in Q1 2026, suppliers will be able to ship products directly to a free trade zone at the Huntsville, Alabama facility.

Facility Network:

• Manufacturing: The primary manufacturing site for lower-volume, higher-mix products and prototypes is in Huntsville, Alabama. Production of higher-volume, lower-mix assemblies is outsourced to subcontractors.
• Research & Development: R&D functions are maintained at multiple sites across the U.S., Europe, Israel, and Asia.
• Distribution: The majority of products for U.S. customers are shipped from Huntsville, Alabama. International customers are primarily served from logistics hubs in Meiningen, Germany, and York, United Kingdom. Direct shipping from subcontractors to various customers also occurs.

Operational Metrics: Most of the Company's facilities are certified to ISO 9001, TL 9000, ISO 14001, and ISO 27001 standards. The Huntsville, Alabama facilities and many key suppliers are C-TPAT certified. Products also comply with specific customer industry and privacy standards, including those related to electromagnetic energy emission and safety.

Market Access & Customer Relationships

Go-to-Market Strategy: Distribution Channels:

• Direct Sales: The Company utilizes a direct sales organization to support major accounts globally.
• Channel Partners: Sales to smaller and independent telecom companies are fulfilled through a combination of direct sales and a distribution network. Managed Service Providers (MSPs), Value-Added Resellers (VARs), and Systems Integrators (SIs) may be affiliated as channel partners, receiving benefits such as product discounts, market development funds, technical support, and training.
• Digital Platforms: Cloud-hosted SaaS applications are offered, forming part of the service delivery model.

Customer Portfolio: Enterprise Customers: ADTRAN Holdings, Inc. serves a diverse global customer base, including large, medium, and small Service Providers, alternative Service Providers (such as utilities, municipalities, and fiber overbuilders), cable/MSOs, Small-to-Medium-sized Businesses (SMBs), distributed enterprises (including Fortune 500 companies), hyper-scalers, neocloud and content providers, data center companies, and federal, state, and local government agencies.

• Customer Concentration: In 2025, one international Service Provider accounted for 14.2% ($153.7 million) of total revenue. The next five largest customers collectively comprised 20.4% of total revenue.

Geographic Revenue Distribution:

• United States: 44.4% of total revenue ($480.8 million)
• United Kingdom: 19.7% of total revenue ($213.1 million)
• Germany: 12.0% of total revenue ($129.7 million)
• Other international: 24.0% of total revenue ($260.2 million)
• Growth Markets: The Company anticipates positive future outlook from public funding programs like the Broadband Equity, Access and Deployment Program (BEAD), expected to commence in 2026, which will drive fiber expansion.

Competitive Intelligence

Market Structure & Dynamics

Industry Characteristics: The telecommunications industry is characterized by accelerating demand for bandwidth, driven by the global growth of cloud and mobility (5G), industrial applications, AI, home office, and mobile working. This necessitates more flexible provisioning of services and precise network synchronization. Service Providers are investing in networks to pursue subscriber growth, retention, and average revenue per user (ARPU), while also streamlining operations, lowering energy consumption, and improving sustainability. Key drivers for network investment include government funding programs (e.g., BEAD), private equity infrastructure investment, regulatory broadband policies, competition, and increasing subscriber demand for higher-speed broadband. The industry is transitioning to full fiber access networks to meet complex requirements and efficiency demands.

Competitive Positioning Matrix:

Direct Competitors

Primary Competitors:

• Subscriber Solutions: Calix, Ciena, Nokia, eero, RAD, and a growing number of Asian based ODMs selling directly to carriers.
• Access & Aggregation Solutions: Nokia, Calix, Vecima, Harmonic, and Microchip.
• Optical Networking Solutions: Ciena, Cisco, Ekinops, Nokia, Smartoptics, and Ribbon Communications.
• Designated "high-risk vendors": Huawei and ZTE Corporation, with whom the Company competes less often.

Emerging Competitive Threats: The Company faces threats from new market entrants, disruptive technologies, and alternative solutions, such as those using coaxial cable and cellular transmission, particularly in high-density metropolitan areas. Competitors with greater financial, technological, manufacturing, sales, and marketing resources pose a challenge. Aggressive price competition is also a significant factor, especially from competitors with a stronger presence in lower-cost markets or those with more favorable component pricing and allocation.

Competitive Response Strategy: ADTRAN Holdings, Inc.'s strategy involves providing innovative and cost-effective solutions that enable customers to address increasing broadband demand. This includes focusing on technology transformations in broadband network infrastructure, home and business CPE, and software platforms. The Company emphasizes innovation in network, home, and business technology, paired with a customer-focused organizational structure. It aims to diversify its customer base through cross-selling its current portfolio and acquiring new customers and partners. A key aspect of its strategy is a strong focus on sustainability and the energy consumption of its products.

Risk Assessment Framework

Strategic & Market Risks

Market Dynamics:

• Revenue Fluctuations: Revenue is difficult to predict and fluctuates due to customer spending patterns, deployment cycles, and manufacturing issues.
• Lengthy Sales and Approval Processes: Service Providers require extensive product qualification (6-18 months or longer), leading to revenue fluctuations and uncertainty.
• Intense Competition: Markets are intensely competitive with new entrants and aggressive price competition, potentially reducing gross profit margins and market share.
• Technology Obsolescence: Rapidly changing technology and evolving industry standards can render existing products obsolete or unmarketable.
• Customer Concentration: Heavy dependence on sales to certain major Service Providers means the loss or significant reduction of business from any could materially impact revenue and net income.
• Ongoing Inflationary Pressures: These pressures can decrease demand, increase manufacturing and operating costs, reduce liquidity, and limit access to capital, negatively impacting profitability.
• Geopolitical Tensions: Global supply chain disruptions, increased costs, trade restrictions, and tariffs can adversely affect international commerce and operating results.

Operational & Execution Risks

Supply Chain Vulnerabilities:

• Limited Suppliers: Dependence on a limited number of suppliers for certain raw materials, key components, and ODM products can lead to supply shortages, increased costs, and delivery delays.
• Inventory Management Complexity: Managing inventory is complex, with risks of excess or obsolete inventory leading to write-downs (e.g., $8.6 million in 2024, $24.3 million in 2023 due to product discontinuations).
• Manufacturing Outsourcing: Reliance on subcontractors introduces risks related to process technologies, product quality, delivery schedules, manufacturing yields, and costs.
• Product Interoperability: Products must interoperate with diverse existing networks; errors or defects can delay or cancel installations and increase costs.
• Intellectual Property (IP) Risks: Failure to maintain IP rights, infringement claims, and litigation can result in significant legal fees, judgments, or restrictions on product sales.
• Third-Party Hardware/Software Dependency: Licenses for integrated third-party technology may not be available on commercially reasonable terms, potentially increasing costs or requiring substitute development.
• Open Source Software Use: Use of open source software could impose limitations on the ability to commercialize products if licenses are broadly interpreted.
• Cybersecurity Breaches: Breaches of information systems and cyberattacks could compromise intellectual property, sensitive data, disrupt business operations, cause reputational damage, and incur significant remediation costs.
• AI Development and Use: Early phases of AI technology development and use carry risks of flaws, rapidly evolving regulations, legal/regulatory action, reputational damage, competitive disadvantage, and reliance on third-party AI models (potential for data leakage, inaccuracies, or bias).

Financial & Regulatory Risks

Market & Financial Risks:

• Significant Indebtedness: Total debt of $218.0 million (2025) limits cash flow for operations, increases vulnerability to adverse economic conditions, and restricts additional financing.
• Domination and Profit and Loss Transfer Agreement (DPLTA) Obligations: Significant cash requirements for Exit Compensation (up to approximately $357.0 million if all minority shareholders tender shares) and Annual Recurring Compensation ($9.3 million annually). The adequacy of this compensation is challenged in appraisal proceedings, with a potential for higher court-adjudicated payments.
• Customer and Distributor Credit Risks: Exposure to credit risks of customers and distributors may lead to difficulties in collecting accounts receivable and potential bad debt expense.
• Gross Margin Volatility: Gross margins can vary due to changes in customer, geographic, or product/service mix, new competitor products, cost reductions, labor/material costs, foreign currency fluctuations, expediting costs, inventory issues, and warranty costs.
• Foreign Currency Exchange Rate Fluctuations: Exposure to adverse movements in foreign currency exchange rates (primarily Euro and British Pound) can unfavorably impact revenue, gross margins, operating expenses, and cash flows.
• Goodwill Impairment: A non-cash goodwill impairment charge of $297.4 million was recognized in 2024 for the Network Solutions reporting unit; future impairments are possible if market conditions or forecasts change.
• Convertible Senior Notes Risks: Indebtedness from the notes, potential dilution to common stockholders, counterparty risk with capped call transactions, and accounting methods affecting reported financial condition and results.
• Interest Rate Fluctuations: Changes in interest rates can increase borrowing costs on variable-rate debt facilities.

Regulatory & Compliance Risks:

• Complex and Evolving Laws: Subject to complex and evolving U.S. and foreign laws and regulations, including those governing telecommunications, environmental matters, global trade, AI, anti-bribery, data privacy (e.g., GDPR, CCPA), and cybersecurity. Violations can lead to penalties, increased costs, and reputational harm.
• Trade Policy and Tariffs: Changes in U.S. and international trade policies, including the imposition of additional tariffs (e.g., on semiconductors) and retaliatory actions, can increase costs, reduce margins, decrease demand, and lead to enforcement actions.
• Tax Regulations: New or revised tax regulations (e.g., Inflation Reduction Act, OECD Inclusive Framework, One Big Beautiful Bill Act), changes in the effective tax rate, recognition of valuation allowances, or assessments from tax audits can adversely impact financial results.
• Sustainability and Governance Expectations: Failure to meet sustainability and governance targets, adhere to public statements, comply with laws, or meet evolving stakeholder expectations can result in legal/regulatory proceedings, reputational harm, and increased costs.

Geopolitical & External Risks

Geopolitical Exposure: Ongoing military conflicts (e.g., Ukraine, Middle East), and geopolitical tensions (e.g., China-Taiwan relations) can disrupt the supply chain, international sales, and operations. U.S. Credit Rating Downgrades/Government Shutdowns: Further downgrades of the U.S. credit rating or government shutdowns could negatively impact liquidity, financial condition, and earnings.

Innovation & Technology Leadership

Research & Development Focus: ADTRAN Holdings, Inc.'s R&D efforts are central to its strategy, focusing on adapting to rapidly changing technology, evolving industry standards, and customer requirements. Core Technology Areas:

• Access and Edge Transmission Technologies: Continuous innovation to deliver faster internet speeds, more capacity, better quality of service, and operational efficiency.
• Software, Solutions, and Platforms: Development of software, solutions, and platforms that enable Service Providers to increase revenue-generating service velocity, reduce operational costs, increase scale, and provide service agility.
• Network Architectures: Active engagement in optical transport, packet demarcation and aggregation, synchronization, fiber-optic access, DSL, access routing, Ethernet switching, wireless LANs, integrated access, converged services, and Voice over IP (VoIP).
• Vertical Optical Technologies: Focus on Silicon Photonics and microelectronics to differentiate and control the vertical value stack of solutions. Innovation Pipeline:
• In 2025, the Company launched an auto-tunable 50G C-band pluggable transceiver, expanded its Wi-Fi 7 portfolio with the SDG 9000 Series for residential, small business, and MDU connectivity, and introduced the new FSP 3000 OLS solution.
• Continued advancement of its software and AI strategy through the Mosaic One platform.
• Research projects are underway in sustainable optical transmission, security, quantum communications, Software Defined Networking (SDN), and access technologies.
• The Company employs lean agile practices in R&D to ensure responsiveness and customer focus, aiming for faster, higher-quality, and more economical product delivery.

Intellectual Property Portfolio:

• Patent Strategy: ADTRAN Holdings, Inc. owns approximately 1,000 patents worldwide and has over 50 additional pending patent applications, with patents expiring between 2026 and 2044. The Company continues to seek additional patents related to its R&D activities.
• Licensing Programs: The Company does not derive any material revenue from the licensing of its patents.
• IP Litigation: The communications industry is characterized by increasing patent litigation. The Company has received, and may continue to receive, claims of patent or intellectual property infringement, which could result in significant legal costs, judgments, or require licensing agreements.

Technology Partnerships: ADTRAN Holdings, Inc. leverages partners for some solutions and licenses intellectual property or acquires technologies. It is an active participant in several Standards Developing Organizations (SDOs), including ITU-T, ATIS, ETSI, and the Broadband Forum (BBF), contributing to worldwide standards in broadband access, optical networking, and synchronization. The Company is also a member of MEF, TIA, CableLabs, and TIP.

Leadership & Governance

Executive Leadership Team

Leadership Continuity: The Company's success is significantly dependent on attracting and retaining key personnel, including its executive officers, engineers, and software developers. Changes in the management team, whether due to hiring or departures, can lead to increased attrition, reduced productivity, loss of institutional knowledge, and business disruptions.

Board Composition: The Board of Directors holds ultimate responsibility for the Company's cybersecurity program, with the Audit Committee providing critical oversight through regular reviews. The Board also maintains a dedicated Sustainability Committee, reflecting its commitment to environmental and social governance.

Human Capital Strategy

Workforce Composition: As of December 31, 2025, ADTRAN Holdings, Inc. had a total of 3,338 employees, comprising 3,201 full-time and 137 part-time employees. The workforce is geographically distributed, with 1,162 employees in the U.S. and 2,176 employees in international subsidiaries across North America, Latin America, EMEA, and APAC regions. The Company also utilized 249 contractors and numerous temporary employees globally. The workforce is highly educated, with the majority of employees serving in engineering, information technology, and technical roles. Approximately 88 employees (75%) of Adtran GmbH and Adtran Technology GmbH, and 98 Adtran Networks employees in Switzerland, France, Italy, Finland, and Spain, are subject to collective bargaining agreements.

Talent Management: Acquisition & Retention: The Company's objective is to recruit, hire, and retain top talent by fostering a diverse, equitable, and inclusive workplace that offers opportunities for career learning and growth. Its hiring strategy includes a cooperative education program to recruit technical talent from diverse communities. Retention is supported by competitive compensation and benefits, along with community service and other programs designed to build employee connections. Diversity & Development: ADTRAN Holdings, Inc. has a diverse employee base located in 34 countries. It invests significant resources in talent development, offering numerous training opportunities in technical and professional development topics. The Career Development Program provides employees with paths to develop competencies in technology, business acumen, emotional intelligence, design, and systems thinking, supporting career advancement. Culture & Engagement: The Company prioritizes employee well-being, providing access to health, dental, and vision insurance, as well as accident, life, and hospital indemnity insurance. An employee assistance program is offered for mental health support. At its global headquarters in Alabama, on-site services such as nurse practitioner care and a fitness center are available.

Environmental & Social Impact

Environmental Commitments: ADTRAN Holdings, Inc. is committed to being a responsible corporate citizen, with sustainability integrated throughout the company. Climate Strategy:

• Emissions Targets: The Company has established science-based emissions targets.
• Renewable Energy: It continues to purchase Renewable Energy Credits, which equal approximately 20% of its total energy consumption.
• Eco-Design: Eco-Design guidelines have been established within the Technology organization, and Life Cycle Assessments are conducted across the product portfolio. Supply Chain Sustainability:
• Supplier Engagement: The Company uses the IntegrityNext platform to engage suppliers for ESG assessments, monitoring sustainability risks in its supply chain.
• Responsible Sourcing: ADTRAN Holdings, Inc. is subject to disclosure and related requirements concerning the presence of conflict minerals in its products or supply chain.

Social Impact Initiatives:

• Community Investment: The Company supports strong community service programs.
• Product Impact: Its corporate vision is to enable a fully connected world, which it believes can be accomplished using fewer resources, highlighting the social benefit applications of its products.
• Reporting: The Company expects to issue a sustainability report for 2025 in early 2026, using EU ESRS guidelines to fulfill EU Corporate Sustainability Reporting Directive (CSRD) obligations.

Business Cyclicality & Seasonality

Demand Patterns: ADTRAN Holdings, Inc. experiences quarterly fluctuations in revenue due to various factors, including the varying budget cycles and seasonal buying patterns of its customers. Typically, customers tend to spend less in the first fiscal quarter as they finalize their annual capital spending budgets. These seasonal effects can vary and do not always correlate with operating results. The Company's revenue has fluctuated in recent years, but 2025 saw an improvement due to recovery in end markets and a decrease in customer inventories. Economic Sensitivity: The Company's business is sensitive to economic conditions. Revenue declines were observed in 2024 due to economic uncertainty and customer focus on inventory adjustments. However, 2025 showed a recovery driven by a return to normalized customer spending and increased fiber expansion. Industry Cycles: The global trend towards the deployment of more robust broadband speeds and access continues to create market opportunities. Public funding programs, such as the Broadband Equity, Access and Deployment Program (BEAD), expected to commence in 2026, are anticipated to provide a positive outlook for future growth.

Planning & Forecasting: Due to customers typically requesting product delivery within a short period after order receipt, the Company does not maintain a significant order backlog. Consequently, it is highly dependent on obtaining orders and completing deliveries within each quarter to achieve targeted revenue. Long manufacturing lead times can complicate accurate demand forecasting and inventory management, potentially leading to multiple ordering by customers.

Regulatory Environment & Compliance

Regulatory Framework: ADTRAN Holdings, Inc. operates under complex and evolving U.S. and foreign laws, regulations, and standards. Industry-Specific Regulations:

• Telecommunications: Products incorporated into wireless communication systems must comply with various government regulations, including those of the FCC, and directives/standards from communications authorities in various countries and international bodies. The Company's development process adheres to ISO 9001, TL 9000, ISO 14001, and ISO 27001.
• Environmental: Environmental legislation, particularly within the EU (e.g., CSRD, Carbon Border Adjustment Mechanism (CBAM), Waste from Electrical and Electronic Equipment (WEEE) directive, Environmentally Sustainable Products Regulation (ESPR)), may increase costs. The Company is also subject to conflict minerals disclosure requirements.
• Data Privacy: Compliance with a wide array of provincial, state, national, and international data privacy laws and regulations, such as the General Data Protection Regulation (GDPR) and the California Consumer Privacy Act, is required.

Trade & Export Controls:

• Export Restrictions: The import and export of products and services are subject to international treaties, U.S. trade policy, tariffs, export controls, sanctions laws, customs regulations, and local trade rules globally.
• Sanctions Compliance: The Company is exposed to sanctions imposed by the U.S. and other countries (e.g., on Russia), which could disrupt international commerce.
• Tariffs: The U.S. has introduced trade policy actions increasing import tariffs. A February 20, 2026 Supreme Court ruling struck down certain tariffs under the International Emergency Economic Powers Act (IEEPA), but the U.S. presidential administration announced intentions to invoke other laws and new tariffs (including on semiconductors, expected to increase in June 2027). These actions can increase supply chain costs, reduce margins, and decrease demand.

Legal Proceedings:

• Material Litigation: The Company is routinely involved in various lawsuits, claims, investigations, and legal proceedings related to employment, patent rights, regulatory compliance, stockholder claims, and contractual disputes.
• DPLTA Appraisal Proceedings: Minority shareholders of Adtran Networks have initiated court-led appraisal proceedings in Germany, challenging the adequacy of the Exit Compensation (€17.21 per share plus guaranteed interest) and Annual Recurring Compensation (€0.52 per share) offered under the Domination and Profit and Loss Transfer Agreement (DPLTA). A final decision is not expected before 2027, likely 2028 or beyond, and could result in higher compensation payments.

Tax Strategy & Considerations

Tax Profile:

• Effective Tax Rate: The Company's effective tax rate was -16.0% for 2025, a significant change from -1.7% in 2024. This change was primarily driven by shifts in the mix of earnings between jurisdictions with different statutory tax rates and changes in the Company's valuation allowance.
• Geographic Tax Planning: The Company is subject to taxation in various domestic and international jurisdictions and employs international tax structures and transfer pricing strategies.
• Tax Reform Impact:
  • Inflation Reduction Act (2022): Introduced a 1% excise tax on stock buybacks and a 15% corporate minimum tax on certain large companies. The impact depends on additional guidance.
  • OECD Inclusive Framework (January 2026): Introduced administrative guidance (the "Side-by-Side Package") including new safe harbors and an extension of the transitional country-by-country reporting safe harbor, reconfiguring key aspects of Pillar Two compliance.
  • One Big Beautiful Bill Act (OBBBA) (July 2025): Enacted significant tax legislation, making permanent certain provisions of the Tax Cuts and Jobs Act of 2017 and introducing additional changes. Key business-related provisions include the continuation of the 21% federal corporate income tax rate, enhancements to bonus depreciation (100% for qualified property acquired after January 19, 2025), full expensing of domestic research and experimental expenditures (effective for tax years beginning after December 31, 2024), and modifications to international provisions (Net CFC Tested Income and Foreign-Derived Deduction Eligible Income) with permanent Section 250 deductions generally effective for taxable years beginning after December 31, 2025. The Company does not expect a material impact on its 2025 fiscal year results or near-term results from the OBBBA.

Insurance & Risk Transfer

Risk Management Framework: ADTRAN Holdings, Inc. has implemented mechanisms, controls, technologies, and processes to assess, identify, and manage cybersecurity risks. The Company's Enterprise Risk Management (ERM) framework systematically integrates cybersecurity risk assessment and handling into its broader risk management strategy.

• Insurance Coverage: The Company has purchased cybersecurity insurance, though there are no assurances that coverage would be adequate for all incurred losses or claims.
• Risk Transfer Mechanisms: To manage foreign currency exchange rate volatility, the Company has historically entered into derivative transactions, such as euro/U.S. dollar forward contracts. However, as of December 31, 2025, the Company had no outstanding hedges.
• Receivables Purchase Arrangements: On July 1, 2024, the Company entered into a receivables purchase agreement (Factoring Agreement) with a third-party financial institution to accelerate receivable collection and manage cash flow. As of December 31, 2025, total accounts receivables factored amounted to $25.3 million (net of $3.8 million retained in a reserve account). The Factoring Agreement provides for up to $40.0 million in factoring capacity.