Apollo Global Management and Blackstone have closed a $35 billion financing package for Anthropic, structuring what may be the largest private debt facility ever extended to an artificial intelligence company. The commitment funds physical infrastructure—data centers, power contracts, GPU clusters—rather than general corporate use or research budgets. No equity changed hands. The capital sits on Anthropic's balance sheet as senior secured debt against contracted compute capacity.
The financing completes four months after initial terms surfaced in late 2024, a timeline that reflects the complexity of underwriting assets with no historical default data. Apollo and Blackstone co-led the syndicate, each committing roughly $17 billion according to filings reviewed by counterparties. The debt carries a five-year maturity with a floating rate pegged to SOFR plus an undisclosed spread, estimated by sell-side sources in the 275–325 basis point range. Anthropic did not take the full $35 billion at close; the facility operates as a revolver, drawn in tranches as build milestones are met. First drawdown was $8.2 billion on signature, earmarked for two colocation expansions in Northern Virginia and a new build in West Texas.
This matters because the financing model inverts the venture playbook. Anthropic bypassed a traditional Series D equity raise—where valuation markup would have been the headline—and instead sold forward compute contracts to cloud resellers, then borrowed against those contracts. The asset being financed is closer to a telecom tower lease than a software company. Prediction markets now price Anthropic's implied valuation at $1.25 trillion by December 2025, a figure that assumes the company hits contracted revenue of $42 billion in calendar 2026 from API sales and enterprise licenses. That revenue assumption is baked into the debt covenants. If Anthropic underperforms by more than 15% in any trailing twelve-month period, the facility contains a cash sweep that redirects 60% of free cash flow to principal paydown.
The shift from equity to infrastructure debt signals a maturation in how allocators view frontier AI. Blackstone has been public about treating data center exposure as "digital real estate" since mid-2023; Apollo's participation suggests the credit committee views contracted compute as having bond-like cash flow visibility. Both firms are effectively long the thesis that GPU clusters with locked-in off-take agreements behave more like power plants than R&D labs. The risk is that Anthropic's model advantage erodes faster than the debt matures, leaving the lenders with stranded assets whose residual value depends on a secondary market for used H100 and B200 chips—a market that does not yet exist at scale.
Watch three things. First, whether Anthropic draws the second tranche, expected in Q2 2025 and sized at roughly $11 billion, which would confirm the buildout is on pace. Second, credit spreads on the $4.3 billion in A1/A2 tranches that may be securitized and sold to insurance portfolios by mid-year; those spreads will set the benchmark for future AI infra debt. Third, whether OpenAI or xAI announce similar facilities in the next sixty days—if they do, the financing structure becomes the new standard, and equity rounds for frontier labs may become rarer than secondaries.
Apollo and Blackstone have now committed more capital to a single AI company than either firm deployed into commercial real estate in the United States last year. The comp is deliberate.