Artificial intelligence infrastructure start-up Firmus Technologies has tripled its valuation to $6 billion in two months, raising a further $500 million from investors to bankroll its massive data centre developments.

The raising follows Firmus’ funding round in September, when it drew $330 million from investors including Nvidia and local investment house Ellerston Capital at a $1.9 billion valuation. It has flagged a potential sharemarket float next year.

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