Meta Platforms and Microsoft each committed tens of billions of dollars in additional data center leases in their most recent quarters, adding to the massive sums the industry is spending on artificial intelligence. Those pledges helped push overall commitments to future data center leases to more than $850 billion among the largest cloud computing companies. These obligations have continued to climb over the last year as tech giants work to expand their fleet of server farms, according to a Bloomberg analysis of regulatory filings. The future costs, which come on top of active leases, won’t appear on companies’ balance sheets until they begin making payments on them. They’re generally tied to data centers, but can also include facilities such as offices or warehouses.