Power Semis Soar Monday: Wolfspeed, STMicro and On Semiconductor Rally on Vera Rubin Ramp Signals

The report points to market signals tied to Nvidia’s Vera Rubin ramp as the trigger for Monday’s move across power-semiconductor stocks. The headline names Wolfspeed, STMicroelectronics and On Semiconductor, but it provides no specific customer commitment, order figure or timing detail for the ramp.

The available company data show materially different starting points. Wolfspeed reported $757.6M of revenue, down 6.1% YoY, with -16.1% gross margins, -212.4% net margins and $-11.39 diluted EPS for the fiscal year ended 2025-06-29. On Semiconductor reported $6.0B of revenue, down 15.3% YoY, with 33.1% gross margins, 2.0% net margins and $0.29 diluted EPS for the fiscal year ended 2025-12-31.

STMicroelectronics is named in the rally, but no company-specific financial figures are provided here. The key follow-through signal is whether the Vera Rubin-related demand narrative produces concrete order, revenue or guidance evidence rather than another thematic rotation. Wolfspeed’s operating losses and declining revenue leave its rally especially dependent on proof that the catalyst can improve fundamentals.