Iren shares fall over 6% as SemiAnalysis flags data center reliability issues

Investing.com·7 Oct 2026·

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Summary · why it matters

Shares of IREN Ltd fell over 6% in Wednesday trading after research firm SemiAnalysis published a series of critical posts on X reporting severe user complaints about infrastructure quality at the Bitcoin miner-turned-neocloud's data center facilities. According to SemiAnalysis, multiple neocloud customers and end users described Iren's legacy operational sites in Prince George and Mackenzie, British Columbia, as the "worst in the industry," citing multi-day power outages, network upgrade disruptions, storage failures, and air-quality control problems that triggered frequent link flaps and system errors. SemiAnalysis said its own internal testing of Iren GPU capacity, sourced directly and through third-party resellers, confirmed widespread technical shortcomings at those initial locations, though it acknowledged that newer builds in Childress and Sweetwater, Texas, represent a significant operational upgrade with far superior design standards. The firm noted that Iren's massive $2.1 billion investment from Nvidia should help ensure the company avoids cutting technical corners on future site buildouts, but it called on Iren to revise its public investor disclosures and stop claiming it provides fully managed cloud clusters, pointing to the company's most recent annual report on Form 10-K and contrasting comments from Iren's Chief Commercial Officer, who acknowledged the firm currently has no live managed cloud services. SemiAnalysis currently places Iren in the "Not Recommended / Underperforming" tier of its ClusterMAX rankings, well behind neocloud peers CoreWeave Inc and Nebius Group NV, which hold top-tier Platinum ratings.

IREN Ltd ▼

CoreWeave, Inc. Class A Common Stock ▲

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