NextDC shares closed 39.5% lower on Wednesday, the steepest decline in the company's history, after it revised down its revenue and earnings guidance for the current financial year.
The company now expects revenue of between A$475 million and A$500 million, down from the previously forecast A$615 million to A$640 million. Underlying EBITDA has been cut to A$245 million to A$265 million, compared with an earlier range of A$385 million to A$410 million.
The downgrade follows the suspension of infrastructure upgrades at the M3 Melbourne data centre, with electricity distributor Jemena not expecting to resume work before February 2027. Jemena cited safety concerns, restricted access to work sites due to community opposition, and a lack of consent from the local council pending further community consultation.
Citi analysts said in a note that the power delays could affect NextDC's earnings beyond fiscal 2027, pointing to approval delays for the M3 expansion and a longer-than-expected timeline for transformer upgrades.
The development comes as governments globally grapple with growing backlash against data centre developments over their impact on local communities and the environment. In Australia, Treasurer Jim Chalmers told CNBC that the government welcomes investment in data centres and AI infrastructure provided it aligns with the national interest, and that national investment standards are being finalised to address concerns.
NextDC shares have declined for seven consecutive weeks and are on course to end lower for the eighth.