Arm Holdings plc (ARM): Who It Depends On

Arm's chip designers rely on Synopsys' electronic design automation (EDA) software — design compilers, simulation, and verification tools — to build and validate every CPU, GPU, and NPU core before it's released to licensees. Without licensed EDA tooling of this caliber, Arm's engineers simply cannot tape out or verify new IP.

The other half of the EDA duopoly Arm depends on, supplying complementary verification IP and simulation tools used alongside Synopsys throughout the chip design process. Together the two vendors control the software stack Arm's engineers use daily, with no viable third alternative at the leading edge.

As Arm pushes deeper into silicon with reference platforms like Neoverse Compute Subsystems and the Arm Total Design ecosystem, it depends on access to TSMC's leading-edge process nodes to prove those designs are manufacturable and performant before partners commit to building on them.

Arm migrated its compute-intensive EDA verification workloads to AWS in 2016 and now runs tens of millions of parallel simulation jobs a week on AWS Batch and EC2. A prolonged cloud outage or vendor disruption would slow the core engineering pipeline that produces Arm's IP.

A separately managed joint venture, majority owned by Chinese investors, that holds the exclusive right to license Arm's IP to customers in mainland China. It is consistently disclosed as Arm's single largest customer — around a quarter of total revenue near its 2023 IPO, still in the high teens as a share of revenue in its most recent fiscal year. A private company with no public ticker.

Holds a broad Architecture License Agreement letting it design fully custom Arm-based cores for the iPhone, iPad, and Mac lines. Named in Arm's IPO prospectus among its largest licensees and one of the few single customers large enough to move Arm's royalty line on its own.

One of Arm's largest licensees for Android smartphone chipsets (Snapdragon) and increasingly for Arm-based PC processors, using both off-the-shelf and custom-core technology. Regularly cited among the handful of customers that together account for the majority of Arm's concentrated revenue base.

Licenses Arm cores across its Exynos mobile chipsets, memory products, and foundry business, making it one of Arm's longest- standing and most diversified licensees. Trades on the Korea Exchange as a thin, illiquid US OTC ADR, with no proper US-listed ticker.

Ships more Arm Cortex-based smartphone application processors by unit volume than almost any other licensee, largely using off-the-shelf core designs across budget and mid-range Android phones. Trades on the Taiwan Stock Exchange, with no proper US-listed ticker.

Licenses the Arm architecture for its Grace CPU and Grace Hopper/ Blackwell superchips used in AI data centers — a fast-growing royalty stream that followed Nvidia's own abandoned 2020-2022 attempt to acquire Arm outright.

Licenses Arm's architecture to design its custom Graviton server processors, which now power a large and growing share of new AWS compute capacity — making Amazon both one of Arm's key cloud infrastructure providers and one of its fastest-growing chip licensees.

Hundreds of additional licensees across automotive (ADAS and infotainment chipmakers), networking equipment, IoT, gaming consoles, and other smartphone and PC OEMs make up the remainder of Arm's royalty and licensing base, none individually large enough to rank among its disclosed top five customers. Not a single company.