Equinix owns and operates 280 data centers across 77 markets in 36 countries. Companies pay Equinix a monthly fee to place their computer equipment inside these buildings, plug into power, and connect directly to other companies also inside those same buildings. That last part is key. Equinix does not just store servers. It sells connections. When a bank, a cloud company, and a telecom provider all sit inside the same Equinix building, they can pass data between each other without it ever touching the public internet. Equinix calls these connections interconnections, and it charges for each one. More than 94% of revenue comes from these fixed monthly contracts, which typically run one to five years. The diagram below traces where the money goes.
Five years of financial data tell a consistent story. Revenue has grown every single year, from $6.6 billion in 2021 to $9.2 billion in 2025. That is not a spike driven by one big deal. It is steady, compounding growth from thousands of customers adding more space and more connections over time.
Gross margin has also improved over the same period, moving from roughly 47.7% in 2021 to 51.1% in 2025. That means for every dollar of revenue, Equinix is keeping more after paying the direct costs of running its buildings. The biggest of those direct costs is electricity. When power prices fall, margins improve. When they rise, margins get squeezed. The 2025 jump in gross margin partly reflects lower electricity prices in key European markets like Germany, the Netherlands, and the United Kingdom.
Free cash flow grew from $2.5 billion in 2021 to $3.9 billion in 2025. That cash is real money the business generated after paying to keep the buildings running. Equinix pays a portion of it out to shareholders each quarter as a dividend. In 2025 alone it paid $4.69 per share every quarter. The company is also spending heavily to build more data centers. In 2025 it raised $4.4 billion in new debt and equity to fund expansion, opened 16 new data centers, and had 52 more development projects underway.
Equinix's REIT status is central to how the financial model works. Because it distributes taxable income to shareholders, it pays very little U.S. corporate income tax at the entity level. Its effective tax rate in 2025 was 10.6%. Without REIT status, that number would be much higher, and less cash would flow to shareholders. Maintaining REIT status requires meeting complex rules every year, and the company says it monitors compliance continuously.
The company now has over 500,000 interconnections across its global platform and more than 10,500 customers. No single customer accounts for 10% or more of total revenue. The 50 largest customers together represent only about 36% of recurring revenue. That spread means no single departure would be catastrophic. But it also means growth has to come from many small additions, not a handful of large wins.
Several specific risks are documented in Equinix's own filings. Power is the most pressing. Equinix does not generate its own electricity. It buys power from local grids and passes costs through to customers where possible, but rising energy prices or shortages can squeeze margins before that pass-through kicks in. New AI workloads consume far more power per cabinet than traditional servers, and the company says it is already building new data centers with twice the power and cooling capacity of older ones. Finding enough affordable power to expand is a real constraint, not a theoretical one.
A second documented risk involves the buildings themselves. Equinix does not own all of its data centers. Many are leased from third-party landlords. If a landlord fails to maintain power infrastructure or refuses to renew a lease on acceptable terms, Equinix could be forced to shut down a facility suddenly. That would disrupt the customers inside it and damage the company's reputation for reliability. Equinix markets 99.9999% or better operational uptime, so any forced closure would directly contradict its core promise. Third-party internet connectivity providers are a related vulnerability. If a carrier that connects one of Equinix's buildings to the broader internet goes down, customers lose the connectivity they are paying for.