Arm Holdings: How the Chip Architecture Licensing Model Works

Arm Holdings at Peterhouse Technology Park, Cambridge — the architecture behind virtually every smartphone processor and an expanding share of data center and automotive chips

Arm Holdings (NASDAQ: ARM) is the most influential semiconductor company that does not make semiconductors. Based in Cambridge, England, Arm designs processor architectures — instruction sets and CPU core blueprints — and licenses them to companies that manufacture chips. More than 280 billion Arm-based chips have shipped to date, powering virtually every smartphone, most tablets, and a growing share of data center servers, automotive systems, and IoT devices.

Unlike Intel or AMD, which design and sell finished processors, Arm earns revenue by licensing its intellectual property and collecting per-chip royalties from licensees. This asset-light model produces gross margins above 96% and makes Arm a toll-road business on global chip production.

This article explains how Arm's licensing model works, its revenue structure, key customers, the Armv9 transition, competitive threats from RISC-V and x86, and what observers should understand — without offering investment advice.

What Arm Actually Does

Arm designs the instruction set architecture (ISA) and reference CPU/GPU/NPU cores that other companies use to build their own chips:

• Instruction Set Architecture (ISA) — the fundamental set of instructions a processor understands. Arm's ISA (currently Armv9) defines how software communicates with hardware. Licensees build chips compatible with this ISA.
• CPU core designs (Cortex series) — pre-designed processor cores that licensees can integrate into their system-on-chip (SoC). Cortex-A (high performance), Cortex-R (real-time), Cortex-M (microcontroller).
• GPU cores (Mali, Immortalis) — graphics processing units for mobile and embedded devices.
• NPU cores (Ethos) — neural processing units for on-device AI inference.

Arm does not own fabs, does not sell finished chips, and does not compete with its licensees in the chip market. It is purely an IP company — designing the blueprints and collecting fees when others use them.

The Licensing Model Explained

Arm generates revenue through two streams:

• License revenue — upfront fees paid when a company signs an agreement to access Arm's IP. This includes architecture licenses (permission to design custom cores compatible with the Arm ISA), technology licenses (access to specific Cortex/Mali/Ethos core designs), and flexible access agreements (subscription-like bundles).
• Royalty revenue — per-unit fees collected each time a licensee ships a chip containing Arm technology. Royalty rates vary by core complexity, architecture generation, and negotiated terms — typically 1–5% of chip selling price or a fixed per-unit fee.

The licensing model creates two distinct revenue dynamics:

• License revenue is lumpy and front-loaded — large deals signed in one quarter may not repeat the next. Arm reports annualized contract value (ACV) to smooth this.
• Royalty revenue is recurring and volume-driven — it grows as licensees ship more chips and as Arm captures higher royalty rates on newer architectures (Armv9 vs Armv8).

There are three tiers of licensing engagement:

• Architecture license — the most permissive. Allows a company to design fully custom CPU cores using the Arm ISA. Apple, Qualcomm, and Samsung hold these licenses for their custom cores (Apple M-series, Qualcomm Oryon, Samsung Exynos custom cores).
• Technology license — access to specific pre-designed Cortex/Mali cores. The licensee integrates these into their SoC with modifications. MediaTek, most Chinese chip companies, and many IoT chipmakers use this tier.
• Flexible access / Total Access — subscription-style agreements giving access to a broad portfolio of Arm IP for a fixed annual fee plus royalties on shipment. Designed for companies exploring multiple designs simultaneously.

Revenue Structure (FY2025)

Arm's fiscal year ends in March. Key FY2025 (fiscal year ending March 2025) metrics:

• Total revenue: ~$4.0 billion (exceeded $4B for the first time)
• Royalty revenue: ~$2.17 billion (~54% of total; exceeded $2B for the first time)
• License and other revenue: ~$1.84 billion (~46% of total)
• Gross margin: ~96–97% (reflecting the asset-light IP model)
• R&D spend: ~$2.1 billion (>50% of revenue reinvested in architecture development)

For context, FY2026 (ended March 2026) showed continued acceleration: $4.92B total revenue (+23% YoY), $2.61B royalty revenue (+21%), and $2.31B licensing revenue (+25%). Data center royalties more than doubled year-over-year.

The near-97% gross margin is extraordinary even by semiconductor standards. Because Arm sells IP rather than physical products, its cost of revenue is minimal — primarily amortization of acquired intangibles and some support costs.

Where Arm Chips Are

Arm's architecture is present across virtually every computing end-market:

• Smartphones (~99% market share) — every major smartphone application processor (Apple A/M-series, Qualcomm Snapdragon, MediaTek Dimensity, Samsung Exynos) uses Arm architecture. This is Arm's historical stronghold.
• Data center / cloud — AWS Graviton, NVIDIA Grace, Ampere Altra, Microsoft Cobalt, Google Axion all use Arm. Data center is the fastest-growing royalty segment.
• Automotive — ADAS, infotainment, and vehicle compute increasingly use Arm-based SoCs. Arm's automotive royalties show double-digit growth.
• IoT and embedded — Cortex-M microcontrollers are ubiquitous in sensors, wearables, industrial controllers, and smart home devices.
• PC / laptop — Apple M-series Macs, Qualcomm Snapdragon X Elite Windows PCs, and Chromebooks use Arm. Still a small share of the PC market but growing.

Customer Concentration and Ecosystem

Arm's customer base includes hundreds of licensees, but revenue is concentrated among the largest chip companies:

• Apple — designs custom Arm-based cores for iPhone, iPad, Mac, Apple Watch, and Apple Vision Pro. One of Arm's largest royalty payers.
• Qualcomm — Snapdragon mobile SoCs and Snapdragon X PC chips. Architecture licensee with custom Oryon cores.
• MediaTek — Dimensity mobile SoCs using Arm Cortex cores. Large volume licensee.
• Samsung — Exynos SoCs for Galaxy devices. Both architecture and technology licensee.
• NVIDIA — Grace data center CPU uses Arm architecture. Also uses Arm in automotive (Orin/Thor).
• Amazon/AWS — Graviton server CPUs designed in-house using Arm architecture.

Arm's top five customers typically represent a significant portion of total revenue (exact percentage disclosed in the 20-F). This concentration is a risk factor but also reflects the dominance of Arm architecture in high-volume markets.

The Armv9 Transition

Armv9, introduced in 2021, is Arm's current-generation architecture. It matters financially because:

• Higher royalty rates — Armv9 licenses carry higher per-chip royalty rates than Armv8, reflecting added features (security, AI/ML extensions, SVE2 vector processing). Arm has stated Armv9 royalty rates are roughly 2x those of Armv8.
• Growing adoption — Armv9 represented ~25% of royalty revenue by Q2 FY2025 (up from ~10% a year earlier). As more chips transition to Armv9, blended royalty rates rise even without unit volume growth.
• Structural revenue tailwind — the Armv8-to-Armv9 transition is a multi-year upgrade cycle that lifts royalty revenue per chip shipped, independent of end-market demand.

Competitive Landscape

Arm faces competition from two directions:

• x86 (Intel and AMD) — dominant in PCs and data centers historically. Arm is gaining share in both markets but x86 retains the majority of installed base and software ecosystem in traditional computing.
• RISC-V (open-source ISA) — a royalty-free, open-source instruction set architecture. RISC-V is gaining traction in microcontrollers, embedded systems, and some Chinese chip designs. It is the most-discussed long-term competitive threat to Arm.

Arm's competitive advantages against RISC-V include:

• Mature software ecosystem — decades of compiler, OS, and application optimization for Arm.
• Proven high-performance cores — Cortex-X series and custom cores from Apple/Qualcomm demonstrate leadership performance.
• Verification and validation — Arm cores are battle-tested across billions of shipped devices.
• Total cost of ownership — while RISC-V is royalty-free, designing high-performance cores from scratch is expensive. Arm's pre-verified cores reduce time-to-market.

Against x86, Arm's advantages are power efficiency (critical for mobile and increasingly for data center TCO) and licensing flexibility (any company can design an Arm-based chip; only Intel and AMD can make x86 chips).

What Could Go Wrong

• RISC-V disruption — if RISC-V matures to match Arm's performance and ecosystem in high-value segments (smartphones, data center), licensees could reduce Arm dependency. Timeline is uncertain but the threat is real in IoT/embedded today.
• Customer defection or renegotiation — large customers like Qualcomm have disputed Arm's licensing terms (the Qualcomm/Nuvia lawsuit, settled 2024). If major licensees negotiate lower rates or shift to RISC-V, royalty growth could slow.
• China risk — Chinese chip companies are significant Arm licensees. Geopolitical tensions, export controls, or a Chinese push toward RISC-V could reduce Arm's addressable market in China.
• Concentration risk — heavy dependence on smartphone royalties (still the majority). A smartphone market downturn directly impacts Arm's royalty revenue.
• Valuation expectations — Arm trades at a significant premium to most semiconductor companies, pricing in sustained high growth. Any deceleration could lead to multiple compression. (This is context, not investment advice.)

Investor-Education Context

Arm's business model is unusual in semiconductors:

• It is an IP licensing company, not a chipmaker — more comparable to a patent/standards body than to Intel or TSMC.
• Near-97% gross margins reflect the asset-light model but R&D intensity is high (~50%+ of revenue).
• Revenue growth is driven by both volume (more chips shipped) and price (higher royalty rates on Armv9).
• The licensing revenue stream is lumpy quarter-to-quarter; royalty revenue is more predictable.
• SoftBank retains ~90% ownership post-IPO, creating a concentrated shareholder structure.

This article is educational. It does not constitute investment advice, a recommendation to buy or sell, or a valuation opinion.

Sources

• Arm Holdings 20-F FY2025 (SEC EDGAR, CIK 0001973239)
• Arm Q4 FY2025 Earnings Release (newsroom.arm.com)
• Arm Q4 FY2026 Earnings Release (newsroom.arm.com)
• Arm IPO Prospectus F-1 (September 2023, SEC)
• Arm Architecture and Technology pages (arm.com)
• RISC-V International (riscv.org)