Maas Group Holdings loses $699M in market value as Firmus Grid IPO collapses

Maas Group Holdings just learned the hard way what happens when your biggest growth story gets cold feet. The Australian construction and infrastructure company shed more than $699 million in market value after Firmus Grid’s planned initial public offering fell apart.

Jefferies then downgraded its rating on Maas.

How a listing that never happened sank a stock that did

Firmus Grid, an AI infrastructure company backed by Nvidia, had been preparing to list on the Australian Securities Exchange. The offering aimed to raise between A$5 billion and A$7 billion at a target price of A$11 per share.

That price implied an equity valuation of A$30.6 billion to A$43.7 billion. Back in August, Firmus had been valued at A$10.5 billion.

Firmus withdrew its ASX IPO application on October 9, 2026. The company pointed to market volatility and demand it said didn’t accurately reflect the potential of its business.

Maas shares took the first hit before the withdrawal was even formalized. The stock fell 22.4% on October 8, wiping out approximately A$517 million in market capitalization in a single session.

The pain carried into October 9. Reported declines that day ranged from over 6% to as much as 11%, and intraday lows were cited at up to 30%.

By the end of the week, Maas had dropped more than 31%. That marks the largest weekly decline in the company’s history, with cumulative market value losses approaching A$788 million.

Maas also entered a trading halt on October 8-9 as the Firmus situation unfolded. The company later confirmed that its contracts with Firmus remained intact.

Why Maas was so exposed

Maas holds a 3.2% stake in Firmus, secured through a A$300 million investment made in August 2026.

Through its JLE subsidiary, Maas has A$1.1 billion in work orders tied to modular power and electrical infrastructure for Firmus’s AI projects. Of that, A$373 million has already been invoiced.

What this means for Maas and AI suppliers

The gap between the A$1.1 billion in total work orders and the A$373 million already invoiced is the number to watch.

Analysts noted that the sharp drop signaled genuine concern about the embedded value of Maas’s Firmus stake. Some commentators criticized the size of the selloff as excessive relative to the value adjustment that would reasonably be expected.

Maas investors are left holding a stake in a company that was worth A$10.5 billion in August, briefly dreamed of A$43.7 billion, and now has no public price at all.