A Former Bitcoin Mining Company Is About to Pull Off Australia's Second-Biggest IPO Ever

Firmus Technologies started life in 2019 as a Bitcoin mining and cooling company based in Tasmania — a business model that, in the current decade, is starting to look less like a prior career and more like a training montage. The company has since rebuilt itself as an AI data center operator, and on October 6 it plans to launch an IPO on the Australian Securities Exchange seeking up to A$7 billion (about US$5 billion), at a valuation north of US$50 billion. If it lands anywhere near that number, it will be the second-largest IPO in Australian history, trailing only Telstra’s 1997 privatization — a company that took three decades to grow into a national telecom monopoly, being outpaced by one that spent six years mining coins before it started mining GPUs.

Before the IPO even prices, Firmus is separately negotiating roughly $10 billion in pre-IPO financing — about $7.5 billion in debt across senior and mezzanine tranches, plus $2.5 billion in equity — to fund the buildout of a 360-megawatt data center in Batam, Indonesia, where it plans to deploy 170,000 Nvidia chips through a partnership with DayOne Data Centers. Nvidia is also, separately, leading a roughly A$2 billion late-stage equity round into Firmus at a $15.5 billion valuation, through preference shares that convert to ordinary equity once the ASX listing closes. Which means Nvidia is, simultaneously, Firmus’s largest chip supplier, one of its equity investors, and — per reporting on the Batam financing package — a revenue-sharing and credit-enhancement partner on the facility that will run the chips it sold. It is a closed loop, dressed up as a supply chain: Nvidia sells the GPUs, backs the company buying them, and gets a cut of the revenue those GPUs generate once they’re switched on. If any part of that chain wobbles, it’s difficult to say which of Nvidia’s three roles absorbs the loss, because all three are the same company.

The leadership is its own story. Firmus is run by co-CEOs Tim Rosenfield and Oliver Curtis, and Curtis’s résumé includes a two-year prison sentence handed down in 2016 for an insider-trading conspiracy that netted roughly $1.4 million in illegal profits. Asked about it last year, Curtis offered a response that deserves to be read slowly: “The experience of the past presents an opportunity for the future.” It is unclear whether that sentence was written by a media-relations consultant, a parole officer, or an early build of Grok, but it is exactly the kind of line that ends up on a prospectus’s inside cover if nobody stops it in time.

Rosenfield, for his part, has described the company’s ambitions in terms that aim considerably higher than a data center lease: Firmus, he says, represents the moment “Asia-Pacific becomes a producer of intelligence, not just a consumer of it.” It’s a good sentence for an investor deck. It is a slightly harder sentence to square with a company whose seven planned AI factories across Australia, Singapore, Indonesia, and Malaysia currently number two that are actually operational, with the other five targeted for completion sometime in the next 24 months — a timeline that, in this industry, functions less as a deadline than as a rolling suggestion.

None of this is disqualifying on its own. Data center buildouts take years by design, vendor financing is how every capital-intensive industry from railroads to semiconductors has ever scaled, and a felony from a decade ago is not evidence that the current venture is unsound. OpenAI has already signed on as an anchor tenant for capacity at two of Firmus’s Malaysian facilities, and institutional investors including Coatue, Blackstone, and Jane Street have put real money in ahead of the float. Local skepticism in Tasmania, where three of Firmus’s projects are sited, has focused less on the finances and more on the practical matter of a mining-company-turned-data-center-operator’s appetite for power and water — a concern financial adviser Sam Baker summarized with the kind of institutional shrug that tends to precede a very large check being written anyway: “Whether or not there is some resistance across retail shareholders, that will remain to be seen.”

What makes Firmus worth watching isn’t any single number in the deal, it’s the shape of it: a crypto miner’s power infrastructure repurposed for AI, a chipmaker financing its own customer while also owning a piece of it, and a leadership team candid enough to describe past legal trouble as an “opportunity.” If the IPO prices anywhere near $50 billion on October 22, it will be treated as validation of the entire AI infrastructure boom. It will also be a fairly precise snapshot of how much of that boom currently runs on vendor financing, investor faith, and five data centers that don’t exist yet.

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