Bitcoin miner TeraWulf soars on a $19 billion AI data-center lease with Anthropic

TeraWulf began as a bitcoin miner, running warehouses of specialized computers to earn newly issued coins, a business whose margins tightened after last year's halving cut the mining reward in half.

Like several of its peers, it has pointed its power capacity and sites at hosting AI computing instead, where a single tenant on a long lease offers steadier income than the volatile economics of mining. The company still runs a bitcoin operation, but the Anthropic lease and its wider pipeline may now define its value.

Meanwhile, TeraWulf added it will sell its entire 50.1% stake in the Abernathy data-center joint venture in Texas to a group led by its partner Fluidstack for about $530 million, monetizing roughly $450 million of invested capital at a premium and freeing cash to expand data centers it owns outright.

The deal fits a rotation CoinDesk has tracked all year. As of March 2026, Bitcoin miners sold more than 15,000 coins from peak holdings and signed over $70 billion in AI computing contracts, chasing the steadier margins of the AI trade, the same shift of capital toward artificial intelligence that has pulled money out of crypto through a losing first half.

The lift stood out against a soft day for bitcoin itself. The token slipped toward $61,900 on Monday after Strategy disclosed the sale of 3,588 bitcoin for about $216 million, a sharp step up from the 32 coins it sold weeks ago.