Nebius' Heavy CapEx Push: Can Customer Prepayments Ease the Strain?

Nebius Group (NBIS) reaffirmed $20-25 billion capital expenditure guidance for 2026 as it races to build AI infrastructure capacity, targeting 5 gigawatts of contracted power by year-end. The company plans to cover 50-60% of capex through customer prepayments, supplemented by operating cash flow and asset-backed financing.

The aggressive expansion places NBIS in direct competition with CoreWeave (CRWV) and hyperscale cloud providers including Microsoft (MSFT) and Amazon for AI compute market share. Customer prepayments signal strong demand visibility but also underscore the capital intensity required to secure infrastructure before revenue materializes.

The financing strategy shifts a significant portion of buildout risk to customers willing to lock in capacity, though execution risks remain substantial given the scale of deployment and competitive pressure from better-capitalized rivals. Operating leverage will hinge on NBIS converting contracted power capacity into revenue-generating workloads while maintaining margin discipline amid industry-wide GPU supply constraints.