The Cambridge Spin-Off That Ended Up Inside Every Phone on Earth: The Untold Story of Arm

If you're reading this on a smartphone, there's a near-certainty that the processor inside it doesn't belong to Apple, Samsung, or Qualcomm — not really. It belongs to Arm, a British company that has never manufactured a single chip in its history. Instead, Arm designs the underlying architecture — the instruction set and blueprint — that almost every mobile chipmaker on the planet licenses and builds on top of. It's one of the strangest and most successful business models in tech, and it started almost by accident, in Cambridge, with a team of four engineers.

From a Struggling PC Maker to a Spin-Off No One Expected

The story begins with Acorn Computers, a Cambridge firm best known in the UK for building desktop machines for schools. In the early 1980s, Acorn needed a processor for its next generation of computers, and nothing on the commercial market fit what it wanted: something fast, efficient, and cheap enough to put in an affordable machine. So a small team led by Sophie Wilson and Steve Furber decided to design one from scratch. The result, first used in 1983, was the Acorn RISC Machine — RISC standing for "reduced instruction set computer," a design philosophy that favored a small number of simple instructions executed very quickly over a large, complex instruction set. That chip went on to power the Acorn Archimedes, a well-regarded but commercially modest line of computers.

The real turning point came in November 1990, when the processor team was spun out of Acorn entirely, forming Advanced RISC Machines Ltd as a three-way joint venture between Acorn, Apple, and the chip manufacturer VLSI Technology. Each partner brought something different to the table: Acorn contributed around a dozen staff and the existing chip designs, VLSI supplied manufacturing tools and expertise, and Apple put in roughly $3 million in cash. Apple's interest wasn't charitable — it needed a low-power chip for an ambitious new handheld device it was developing called the Newton. The new company's name change, from "Acorn RISC Machine" to "Advanced RISC Machines," reportedly came at Apple's request, since Apple didn't want a rival's name baked into a company it was now funding.

Betting Everything on Power Efficiency

What made Arm's chips different wasn't raw speed — it was how little power they consumed doing useful work. In the early 1990s, that seemed like a niche advantage. Desktop computing, where Intel's x86 architecture dominated, was obsessed with clock speed, not battery life. But Arm's engineers had, almost by necessity, designed something that happened to be perfectly suited for a future nobody was fully picturing yet: a world of battery-powered, pocket-sized devices.

Arm turned its first profit in 1993 and opened offices in Silicon Valley and Tokyo the following year, signaling that its ambitions stretched well beyond Cambridge. But the company's defining decision was a business model shift: rather than manufacture chips itself, Arm would simply license its designs — and later, entire finished chip blueprints — to other companies, collecting a fee and a small royalty on every chip shipped. It was a model that let Arm's architecture spread everywhere without Arm ever having to build a single fabrication plant, one of the most capital-intensive investments in all of industry.

That bet paid off as the device landscape shifted. Nokia's early feature phones used Arm-based chips. So did the first Palm devices. By the time Apple launched the original iPhone in 2007, Arm's low-power architecture was the obvious — effectively the only — choice. Today, Arm-based designs power the vast majority of the world's smartphones, including every iPhone and the overwhelming majority of Android devices sold across the UAE and the wider Gulf region, as well as billions of other embedded devices: routers, smart TVs, wearables, and increasingly, data-center servers.

Going Public, Getting Bought, and a Takeover That Fell Apart

Arm first listed on the London Stock Exchange and Nasdaq in 1998, giving the company public-market capital to expand its licensing business globally. For nearly two decades afterward, it operated as an independent, publicly traded company — until 2016, when Japanese conglomerate SoftBank Group, led by Masayoshi Son, acquired Arm outright in a deal worth roughly $32 billion. It was one of the largest technology acquisitions in British corporate history, and it took Arm private again, this time under the ownership of one of the world's most aggressive tech investors.

The next major chapter almost changed the entire semiconductor industry's balance of power. In September 2020, SoftBank agreed to sell Arm to Nvidia in a deal initially valued around $40 billion — and worth considerably more later, as Nvidia's own stock price surged. The pitch was that combining Nvidia's chip-design muscle with Arm's architecture and licensing reach would create a vertically integrated powerhouse. But regulators disagreed, worried about handing one of the industry's most powerful players control over an architecture that its own competitors depended on to build competing chips. The US Federal Trade Commission sued to block the deal in December 2021, and after facing resistance from UK and EU regulators too, Nvidia and SoftBank abandoned the acquisition in February 2022.

Rather than find another buyer, SoftBank pivoted to taking Arm public again. In September 2023, Arm listed on the Nasdaq under the ticker ARM, pricing its IPO at $51 per share — the top of its proposed range — and raising roughly $4.87 billion in what became the largest US tech listing of that year. The offering valued the company at about $54.5 billion, and shares jumped more than 24% on their first day of trading, pushing Arm's market value toward $64 billion. SoftBank retained the vast majority of its stake, selling only around 10% of the company in the offering.

Why This Still Matters in the Gulf

Arm's architecture isn't an abstract story for UAE tech buyers — it's embedded in the devices people here use every single day. Every iPhone sold through Apple's Dubai Mall and Yas Mall stores runs on Apple's own Arm-based chip designs. The Snapdragon processors inside most flagship Samsung and Android devices sold across the Emirates are built on Arm's architecture under license. And as Gulf governments pour billions into sovereign AI infrastructure and chip strategy — from Abu Dhabi's G42 to broader regional data-center buildouts — Arm-based server designs are increasingly part of that conversation too, as the industry looks for more power-efficient alternatives to traditional data-center chips for AI workloads.

It's a reminder of something easy to forget in an industry obsessed with the next flagship launch: the most important technology company in mobile computing is one most consumers have never heard of, and it has never sold a single finished chip to the public. It just designed the blueprint — and let the rest of the industry build the future on top of it.