Wolfspeed Q4 FY26: AI Revenue Doubles, But Utilization and Margins Remain Unaddressed

What happened

Wolfspeed reported fiscal Q4 2026 results on August 19, highlighting that AI data center revenue more than doubled year-over-year and rose about 20% sequentially. The company also launched its fifth-generation SiC MOSFET and touted a 10kV MOSFET, but the release omits any disclosure on total revenue, gross margin, or underutilization costs. This omission is notable because the previous quarter (Q3 FY26) showed a gross margin of -27% and underutilization costs up $19 million year-over-year. Management had previously conditioned margin recovery on demand meeting or exceeding production capacity, a condition not addressed in this earnings summary. While AI momentum is real, it remains unclear if it is large enough to materially improve factory loading and cash burn.

Implication

Investors should remain cautious and require quantified data on AI revenue as a percentage of total revenue, as well as evidence of sequential decline in underutilization costs before considering an upgrade. The earnings release appears promotional, omitting the metrics that matter most to the investment thesis. If subsequent filings show continued underutilization and cash burn, the stock's recent rally may be vulnerable to reversal. Current valuation at $53 remains rich relative to the company's negative margins and high cash consumption.

Thesis delta

The thesis is largely unchanged: Wolfspeed still needs to prove that demand can fill its fabs and reduce underutilization costs. The Q4 announcement provides positive AI data center momentum but does not offer the quantified evidence required by the existing WAIT rating. Without disclosure on gross margin and underutilization, the core bear scenario (persistent cash burn and dilution risk) remains intact.