Wolfspeed Inc. (WOLF) | The Buildout — AI Infrastructure
The Verdict
Wolfspeed makes silicon carbide materials and power devices — the components that manage electricity in AI data centers. The mechanism is architectural: as data center racks move from 400-volt to 800-volt power, silicon carbide content rises across the power delivery path, from AC/DC power shelves and battery backup to high-voltage DC-DC conversion and eventually solid-state transformers. Wolfspeed sells into that path mainly through power-supply makers rather than directly to hyperscalers, which leaves it one step removed from the final capex decision. AI demand sits inside the Power product line, in the Industrial & Energy vertical, in the AI data center sub-segment, and management describes it as a moderate portion of the business today.
| Market Cap | — |
| Revenue (TTM) | $665M |
| Revenue Growth | −12.2% |
| EBITDA Margin (TTM) | -53.6% |
| Net Debt | $601M |
| Earnings Beats | 5 of 7 |
| P/E (TTM) | — |
| EV/EBITDA (TTM) | — |
What We Like
- AI data center revenue more than doubled in FY26 versus FY25 and grew about 20% sequentially from Q3 to Q4.
- Named design wins are ramping at power-supply makers LITEON and MacMic to support multiple hyperscalers, spanning established and emerging HPC AI architectures.
- Wolfspeed is vertically integrated, making both SiC substrates and the devices built on them; management ties that to the Gen 5 MOSFET's claimed 'best specific on-state resistance in the industry' and says it has 'absolutely no interest to break it in two.'
- Q3 FY26 refinancing raised $476M, cut the senior secured note balance by about 43%, reduced total debt principal by about $97M, and is expected to lower annual interest expense enough to cover roughly one quarter's adjusted EBITDA loss.
- Near-term promises have been kept: two consecutive quarters delivered at the revenue guide midpoint, gross margin in line, OpEx roughly flat, and the June 2026 PCIM product launches delivered.
What We’re Watching
- Gross margin was -19.9% in Q4 FY26 on a non-GAAP basis and is guided negative again; the ~$800M annual run rate gross-margin breakeven is roughly one-third above the current ~$600M annualized level, with no date attached.
- AI data center sequential growth decelerated from +50% to about +30% to about +20% across the last three quarters of FY26, and management gave no AI revenue target or materiality timeline.
- Materials revenue fell to ~$43M from ~$50M on the 150mm→200mm transition, customer inventory digestion, and some 150mm LTAs running out; management expects this to continue 'for this year.'
- The first-lien refinancing is still pending with no timeline — roughly $630M outstanding at about 16% interest — and $32M of the -$54M Q4 operating cash flow was cash interest.
The thesis is mixed rather than intact. The balance sheet has been reset and management is keeping its near-term commitments, but the operating inflection the story depends on is not yet present: gross margin is negative, EBITDA is negative, and the growth engine is unquantified and decelerating sequentially. The open question is whether AI data center demand can grow into the fab's fixed cost base before the pending refinancing and the cash burn become binding.
Earnings Beat
Wolfspeed reported $150M of revenue in Q4 FY26, at the midpoint of its $140M–$160M guidance and flat versus the prior quarter. Non-GAAP gross margin was -19.9%, a 70 bps sequential improvement but still negative. Adjusted non-GAAP EBITDA was -$62M. Materials revenue fell to ~$43M from ~$50M, while Power rose about 6% sequentially to ~$106M. AI data center was the standout, with FY26 revenue more than doubling versus FY25.
| Metric | Q4 FY2026 | Q3 FY2026 | Q4 FY2025 | YoY |
|---|---|---|---|---|
| Revenue | $150M | $150M | $197M | −24.1% |
| Gross margin | -24.6% | -26.6% | -13.0% | -1160bps |
| EBITDA | −$70M | −$73M | −$521M | −86.5% |
| EPS | $-2.81 | $-2.30 | $-12.87 | −78.2% |
| AI data center sequential growth | ~+20% | ~+30% | n/a | More than doubled FY26 vs FY25 |
| Materials revenue | ~$43M | ~$50M | n/a | — |
In fiscal 2026, revenue in this business more than doubled versus fiscal 2025, including increasing approximately 20% from the fiscal third quarter to the fourth quarter.— Robert Feurle, CEO, 2026-08-19
Management tone: Management became more cautious on automotive, moving from 'near-term demand in automotive remains uncertain' to 'softer results in automotive' and 'hard to predict,' and did not confirm June as a bottom when asked directly. Gross-margin improvement slowed to 70 bps sequentially from a double-digit-point gain. On AI, management gave more concrete product and counterparty detail but declined to size the opportunity or give a timeline. It was direct on balance-sheet cost — quantifying the roughly 16% coupon and the $32M of cash interest — gave no refinancing timeline, and rejected a breakup outright.
Management Guidance
For Q1 FY27, management targets revenue of $140M–$160M, expects non-GAAP gross margin to remain negative, and — newly formalized this quarter — guides non-GAAP operating expenses of $62M–$66M. Medium-term, the CFO put gross-margin breakeven at an ~$800M annual revenue run rate, 'plus/minus several million depending on the mix,' with no date. Q4 revenue annualizes to roughly $600M. The company says it will keep incurring significant underutilization costs until demand meets or exceeds production capacity.
Trajectory
Reported revenue was $149.6M in Q4 FY26 with a -24.6% gross margin, after $168.5M and -46.5% in Q2 FY26 and $150.2M and -26.6% in Q3 FY26. On the company's non-GAAP basis, gross margin went from about -34% in Q2 to -20.6% in Q3 to -19.9% in Q4 — a double-digit-point step, then only 70 bps. The mix is rotating underneath a flat top line: Power was up about 6% sequentially on AI data center demand, while Materials fell on the 150mm→200mm transition and inventory digestion. Management says underutilization costs are the primary driver of the gross-margin profile and will persist until demand meets capacity.
The Model
The model projects FY+1 revenue of $634M with EBITDA of -$212M (-33.5%), moving to FY+2 revenue of $766M with EBITDA of -$159M (-20.8%). The near term is anchored by a flat revenue guide and a gross margin still guided negative; the FY+2 step assumes AI data center and industrial demand load the fab enough to narrow the loss. Across the five model runs, FY+2 revenue spreads 21%, from $720M to $880M.
| Metric | FY2026 | Next FY (E) | Following FY (E) |
|---|---|---|---|
| Revenue | $665M | $634M | $766M |
| YoY Growth | — | −4.7% | +20.8% |
| EBITDA | −$357M | −$212M | −$159M |
| EBITDA Margin | -53.6% | -33.5% | -20.8% |
Projections are the median of 5 independent model runs.
For Q1 FY27, management targets revenue of $140M–$160M, expects non-GAAP gross margin to remain negative, and — newly formalized this quarter — guides non-GAAP operating expenses of $62M–$66M. Medium-term, the CFO put gross-margin breakeven at an ~$800M annual revenue run rate, 'plus/minus several million depending on the mix,' with no date. Q4 revenue annualizes to roughly $600M. The company says it will keep incurring significant underutilization costs until demand meets or exceeds production capacity.
What Could Go Right — and Wrong
- Management discloses an AI data center revenue figure or a timeline for when it becomes material, converting the segment from a qualitative story into a sized one.
- Automotive demand stabilizes and management confirms a bottom, removing a major offset to AI growth.
- Materials stabilizes as 200mm engineering samples convert into qualifying customers and revenue.
- Gross margin reaches the ~$800M annual run rate breakeven, flipping the company to positive gross margin.
- The first-lien refinancing closes on better terms, cutting the cash interest drag and freeing covenant-constrained strategic options.
- Gross margin stays negative because demand does not fill the fab and underutilization costs persist.
- AI data center sequential growth falls below the high-teens percentage, undercutting the diversification narrative.
- Materials continues below ~$43M as 150mm LTAs roll off and inventory digestion continues.
- The first-lien refinancing is delayed or done on worse terms, keeping the roughly 16% coupon and the $350M monthly liquidity covenant in place.
- Automotive demand deteriorates further with no visible bottom, forcing the small AI base to carry more than it can.
Looking Ahead
Over the next four quarters the question is whether AI data center design wins convert into revenue material enough to move a flat top line. The visible wins sit at power-supply makers LITEON and MacMic, one layer removed from the hyperscalers, so a couple of socket ramps can swing the growth rate. Management points to the 800V architecture transition and solid-state transformer engagements as the structural drivers, though neighbor evidence dates the 800V revenue event to late 2027 or 2028. The pending first-lien refinancing, the 150mm→200mm materials transition, and the long-range plan update promised for 2026 but not mentioned on the Q4 call are the other markers.
- Q1 FY27Q1 FY27 results — Tests the Q1 FY27 revenue guide and a negative gross margin.
- 2026Long-range plan update — Promised for 2026; still outstanding as of the Q4 FY26 call.
- Late 2027–2028800V data center ramp — Neighbor evidence dates the 800V revenue event to late 2027 or 2028.
- No timeline givenFirst-lien refinancing — Roughly $630M at about 16%; stated highest priority, no timeline.
Financials
Annual Summary
| Metric | FY2025 | FY2026 | TTM | YoY |
|---|---|---|---|---|
| Revenue | $758M | $665M | $665M | -12.2% |
| Gross Margin | -16.1% | -34.2% | -34.9% | 1,808bps |
| EBITDA | −$808M | −$357M | −$357M | +55.9% |
| EBITDA Margin | -106.7% | -53.6% | -53.6% | +5,302bps |
| Net Income | −$1.6B | −$1.1B | −$1.1B | +34.2% |
| Free Cash Flow | −$1.5B | −$354M | −$354M | — |
| Net Cash | — | — | — | — |
Key Ratios (Trailing)
- P/E TTM—
- EV/EBITDA TTM—
- EV/Revenue TTM—
- Price/FCF TTM—
- Gross Margin (TTM)-34.9%
- EBITDA Margin (TTM)-53.6%
- Net Margin (TTM)-159.3%
- ROIC-27.1%
- SBC / Revenue4.6%
The Company
Wolfspeed is an innovator of wide bandgap semiconductors, focused on silicon carbide materials and devices for power applications. Its product families are power devices — SiC Schottky diodes, MOSFETs, and power modules — and SiC and GaN materials, including bare wafers, epitaxial wafers, and GaN epitaxial layers on SiC wafers. The products that tie it to AI are the silicon carbide devices that convert and manage electricity inside a data center rack, described by management as 'purpose-built for AI rack power.' The environments named in the 10-K are electric vehicles, fast charging, renewable energy and storage.
Wolfspeed is vertically integrated: it makes both the SiC substrates and the power devices built on them, which management frames as a performance differentiator and not a candidate for a split. The company reports Power and Materials as product lines, although the 10-Q states it has one reportable segment measured as a whole. Device production was moved to the 200mm fab the transcripts call Mohawk Valley in upstate New York — the 10-K lists a Marcy, New York site, though the correspondence is inferred — after the 150mm device phase-out completed ahead of schedule. The 10-K lists four facilities: Durham, NC (Silicon Drive, 1,004,000 sq ft), Marcy, New York (632,000 sq ft), Siler City, North Carolina (1,850,000 sq ft), and Durham, NC (Moore Drive, 162,000 sq ft). The company emerged from Chapter 11 on September 29, 2025 and adopted fresh-start accounting, which by its own statement makes historical financial performance not indicative of future performance.
Business Segments
Competitive Landscape
Wolfspeed competes in both halves of its business, and the 10-K names the field. In materials, it cites Coherent, SiCrystal GmbH, IQE plc and Resonac Holdings in the United States, Europe and Japan, plus SICC, TanKeBlue Semiconductor and EpiWorld International in China. In power devices, it cites Infineon Technologies, ON Semiconductor, Rohm, STMicroelectronics, Bosch, San'an Optoelectronics, Silan Microelectronics and SiChain Semiconductor, 'as well as an increasing number of smaller competitors.' The 10-Q also flags competition from 'state-supported international players.'
- ON SemiconductorNamed in the 10-K as a power device competitor. The supply-chain wiring also records ON as a SiC substrate customer describing Wolfspeed as a 'primary external supplier.'
- Infineon Technologies AGNamed in the 10-K as a power device and 200mm substrate competitor; wiring records Infineon as a SiC substrate customer under an expanded multi-year agreement.
- STMicroelectronics N.V.Named in the 10-K as a power device competitor; wiring records STM as a SiC substrate customer under a 'primary global supplier' relationship.
- Named in the 10-K as a materials competitor; wiring also records Coherent as both a customer and a supplier.
- Its own filing names Wolfspeed as a primary SiC competitor; it also names Wolfspeed in GaN and SiC patent litigation and claims Renesas could own up to 39% of Wolfspeed — an assertion not independently confirmed in the source.
Supply Chain
Wolfspeed makes its own silicon carbide substrates and the power devices built on them, so it sits upstream of the power-supply and transformer makers that sell into AI data centers. No hyperscaler is disclosed as a direct customer.
More on WOLF: Earnings recap