Wolfspeed's AI Data-Center Sales Just Doubled. The Stock Still Got Wrecked. Both Are True.

Here's the headline almost nobody led with: while Wolfspeed's overall business shrank, its AI data-center sales more than doubled. In a week where the stock got slammed and the loss came in four times worse than expected, that one number is the story hiding in plain sight. Let's back up. Wolfspeed makes silicon carbide power chips, modules, and the raw material itself — the plumbing that converts and switches electricity far more efficiently than plain silicon ever could. You'll find its parts inside AI server racks, EV drivetrains, and industrial power systems, quietly deciding how much juice actually makes it from the wall to the silicon doing the thinking. And that matters more than ever, because AI's power appetite is outrunning the grid. Every new data center is a physics problem as much as a computing one — the efficiency of the power-conversion equipment matters as much as the compute chips bolted next to it. When every watt counts, the material that wastes the least heat wins, and that's the whole reason silicon carbide exists. It makes Wolfspeed a direct pick-and-shovel play on the AI buildout, a bet that the industry's electricity problem is big enough to fill two enormous new factories. Now the messy part. Q4 revenue came in at $149.6 million, down 24% from $197.0 million a year ago and below the Street's roughly $223.6 million estimate, though right in line with what the company itself guided. The adjusted loss of $2.26 a share was about four times the $0.52 analysts expected, the GAAP net loss hit $145 million, and shares sank double digits Thursday. Context does a lot of heavy lifting here. Wolfspeed emerged from Chapter 11 in September 2025 on fresh-start accounting, then walked straight into the most capital-intensive stretch of its life: building out two 200mm fabs in Mohawk Valley, New York, and Siler City, North Carolina. Free cash flow is deeply negative, Q4 gross margin printed at -25%, and the next quarter won't be pretty either — guidance calls for $140–160 million in revenue with gross margin still in the red. That's the bet in one sentence: burn cash now, fill the fabs with AI demand later. Total debt sits around $1.82 billion against roughly $1.1 billion of cash and short-term investments, so the runway is real but not infinite. In Q4, investors converted $46 million of convertible notes into equity — a small vote of confidence that keeps the balance sheet from bleeding harder. CEO Robert Feurle isn't flinching:

We continued to expand our device business, highlighted by strong growth in AI data center applications and the launch of our fifth-generation SiC MOSFET...

The product story backs him up. Wolfspeed just launched its fifth-generation SiC MOSFET, and its 10kV MOSFET was named a Top Innovation at PCIM 2026. The company stood up a dedicated data-center solutions team in Silicon Valley, signed a collaboration with LITEON, and inked an MOU with GE Aerospace. Aerospace, EVs, and heavy industry are all feeding the same core technology back into the data-center push. The pieces are in place — the only question is timing. For the full year, revenue landed around $665 million, and here's the number to tattoo on your forehead: AI data-center sales more than doubled year over year in fiscal 2026 and grew roughly 20% sequentially in Q4 alone, while virtually everything else shrank. That's the asymmetry worth pricing in: a company burning cash today while positioning itself to own the power layer of the biggest infrastructure buildout of our lifetimes. If AI demand keeps compounding, those empty fabs become the moat. If it stalls, they become the anchor. So here's the honest read. This is a real thesis attached to a genuinely struggling business. The AI power story is compounding, and Wolfspeed is one of the few pure plays on the silicon carbide layer of it. But until those fabs start printing positive gross margins, every quarter is a cliffhanger. Watch the AI data-center line, not the headline loss — that's where the future is being written.

Disclosure: The Signal holds no position in WOLF. Positions may change. This is not financial advice.