Gains as data centers reduce energy use

TLDR

• Nebius rebounded 10.65% in pre-market trading after closing down 12.65% at $148.22.
• Its data centers achieved a PUE of 1.25, beating the industry average of 1.54.
• Nebius says his designs avoid consuming 102 gigawatt hours of electricity in 2025.
• Closed-loop cooling could avoid 3.3 billion liters of water for every gigawatt built.
• Renewable energy and heat recovery support Nebius’ expansive AI cloud network.

Nebius Group (NBIS) shares rebounded 10.65% in pre-market trading to $164.00 after closing down 12.65% at $148.22. This recovery follows the 2025 Sustainability Report covering energy, water and community investments. The report details how Nebius plans to reduce infrastructure costs while expanding its global AI cloud network.

Nebius Group NV, NBIS

Nebius improves data center energy efficiency

Nebius reported an average energy efficiency score of 1.25 across its data center portfolio for 2025. This score compares to a global industry average of 1.54, according to the company’s aforementioned benchmark. A lower result means more electricity going to computing equipment rather than supporting cooling and other facility operations.

The company said its server, rack, cooling and cloud designs avoided saving 102 gigawatt-hours of electricity through 2025. i won’t It is estimated that this amount corresponds to the annual energy use of about 9,800 American households. The company designs its infrastructure as a single system to optimize the useful computing output from each power unit.

Nebius expects total electricity demand to rise as it develops several gigawatts of computing capacity. However, its engineering strategy aims to reduce operating waste in both existing and planned facilities. This approach supports capacity growth while limiting the additional power required per computing unit.

Cooling systems reduce water demand

Nebius also reported reduced water use at a proprietary facility equipped with a closed liquid cooling loop. The site recorded a water efficiency of 0.018 liters per kilowatt-hour at the end of 2025. By comparison, the company indicated a projected average for a US data center of between 0.45 and 0.49 litres.

Based on current designs, i won’t It is estimated that each gigawatt of capacity could avoid the consumption of 3.3 billion liters of water. This volume is equivalent to approximately 900 million US gallons, or about 1,300 Olympic swimming pools. The company plans to deploy similar air and liquid cooling systems in new locations.

Nebius also recovered waste heat from its data center in Mantsala, Finland, during the reporting year. The system supplied 19.5 gigawatt-hours of heat to the local heating grid in 2025. It also reduced heating costs for connected households by about 10%, according to company estimates.

Expanding renewable energy and community investment

i won’t The company will source all its electricity from renewable sources in Iceland, France and the UK through 2025. It has also transitioned its operations in Finland from 95% low-carbon energy to fully renewable electricity. Meanwhile, the company continues to evaluate lower-emission energy options for its facilities in the United States.

One option includes behind-the-meter fuel cells provided through a partnership with Bloom Energy. Nebius also works with utilities before site selection and during data center construction. This process aligns new computing facilities with available power systems and local infrastructure requirements.

Beyond energy projects, Nebius expects his US expansion to create permanent construction and technology jobs. The company also supports STEM education, vocational training, workforce training and first responders near operating sites. In 2025, Nebios Academy partnered with 16 universities, including Rowan University, to develop career paths for AI and cloud.