Vicor is trading 12.5% up at $251.89 after a strong September 21, 2026 semiconductor rally, best attributed to sector-wide AI optimism and broader risk-on sentiment.

  • No verified company-specific announcement or late-breaking earnings release was identified for the session.
  • Recent investor attention has centered on Vicor’s AI OEM licensing agreement and planned ChiP fab expansion, but both announcements predated September 21.