What Is WULF Stock? Why TeraWulf Just Soared 20% on the Anthropic Data Center Deal

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WULF is the Nasdaq ticker symbol for TeraWulf Inc., an American company that started out mining bitcoin with low-carbon energy and has spent the last two years transforming into a builder of massive data centers for artificial intelligence. The stock is suddenly everywhere because it soared about 20% on Monday, July 6, 2026, after TeraWulf announced that Anthropic — the AI company behind Claude — signed a 20-year lease for its data center campus in Hawesville, Kentucky, a deal the company says should generate roughly $19 billion in contracted revenue over the initial term, as reported by CNBC and Investing.com. On the same day, TeraWulf also announced it is selling its majority stake in a Texas data center joint venture, freeing up hundreds of millions of dollars in capital.

What Does TeraWulf Do? From Bitcoin Miner to AI Landlord

TeraWulf was incorporated in early 2021 by energy veterans Paul Prager and Nazar Khan, who came out of Prager's private power company, Beowulf Energy. The original business was straightforward: mine bitcoin using predominantly zero-carbon electricity, anchored by the Lake Mariner campus in Western New York, which draws on the region's abundant hydroelectric power.

Then the AI boom changed the math. Companies that already control large amounts of cheap, reliable power and grid connections turned out to be sitting on exactly what AI developers desperately need. Starting in 2025, TeraWulf began converting and expanding its sites to host high-performance computing (HPC) workloads — the GPU clusters that train and run AI models — signing 10-year hosting agreements with cloud provider Fluidstack at Lake Mariner. Notably, Google backstopped billions of dollars of those lease obligations, taking warrants that could give it roughly 14% pro forma ownership of TeraWulf, per company press releases. By late 2025, TeraWulf's contracted HPC platform exceeded 510 MW of critical IT load.

The Anthropic Kentucky Deal, Explained

Monday's announcement is TeraWulf's biggest yet. Key terms, per the company's press release and SEC filing:

• Tenant: Anthropic, the AI lab behind the Claude models
• Site: The "Justified Data" campus in Hawesville, Kentucky — a purpose-built AI infrastructure campus
• Term: 20 years, with approximately $19 billion of contracted revenue expected over the initial lease term
• Size: Roughly 401 MW of critical IT load, built in phases
• Timeline: Initial capacity in service in the second half of 2027, ramping to full capacity by early 2028

Alongside the lease, TeraWulf agreed to sell its 50.1% stake in the Abernathy, Texas joint venture to an investor group led by its partner Fluidstack. The company says the sale monetizes its roughly $450 million investment at a premium, unlocking capital it can redeploy into wholly owned AI campuses — like the one it is now building for Anthropic.

Why Is WULF Stock Up 20%?

Two reasons, and they reinforce each other. First, a 20-year lease with a marquee AI customer converts TeraWulf from a speculative "AI pivot story" into a company with a massive, long-dated contracted revenue backlog — $19 billion is enormous next to a company that started the day worth well under $10 billion. Second, the Abernathy sale answers the standard bear question — "how will they fund all this construction?" — by turning an existing project into cash. Investing.com reported shares up 20% on the news, trading around the low-$20s and pushing TeraWulf's market value to roughly $10.5 billion.

There's also a sector halo: the deal lands amid a wave of AI infrastructure megadeals, and it signals that frontier AI labs are willing to lease capacity from former bitcoin miners — which is why peers in the space often move on news like this too.

Who Owns and Runs TeraWulf?

TeraWulf is a publicly traded company, so its shares are held by a mix of institutions, insiders, and retail investors. Paul Prager is co-founder, chairman, and CEO; co-founder Nazar Khan serves as a top executive. Large asset managers hold significant positions — SEC filings show Vanguard holding around 6% — and Google holds warrants from its lease backstops that could translate into roughly 14% pro forma ownership, making it one of the most notable strategic backers of the company.

What Sector Is WULF Stock In?

WULF sits at the intersection of two sectors. Formally it is usually classified under technology / digital infrastructure, but in practice it straddles cryptocurrency mining and AI data centers — a group often called "bitcoin miners pivoting to HPC," alongside names investors compare it to in the same trade. Its revenue today still includes bitcoin mining, while its future growth is contracted AI hosting.

Key Risks to Know

Balance matters here. WULF is a highly volatile stock — big single-day pops can be followed by sharp pullbacks. Execution risk is real: the Kentucky campus must be financed, built, and energized on schedule, and the $19 billion figure is contracted revenue over 20 years, not cash in hand today. The company still carries bitcoin price exposure through its mining business, construction of this scale depends on debt markets staying friendly, and heavy reliance on a small number of huge customers concentrates risk. Any analyst price targets you see quoted belong to those analysts — treat them as opinions, not guarantees.

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This article is for informational purposes only and is not financial advice. Stock prices are volatile — always do your own research before investing.