On October 1, Vicor rose 12.2% in pre-market trading, trading at $322.51/share, with turnover of $484,400. The rally was driven by the company's second consecutive upward revision to its third-quarter revenue guidance within two weeks.

On September 30, Vicor raised its Q3 sequential revenue growth guidance from more than 20% to more than 30%, citing increased royalties from the first non-exclusive license to its Vertical Power Delivery (VPD) technology. This marks the second guidance raise in rapid succession — on September 22, the company had already lifted its outlook from nearly 10% to more than 20%, which triggered a roughly 10% single-day gain at the time. The core driver behind both revisions is accelerating royalty income from a VPD licensing agreement with a leading AI OEM, announced on September 16.

These developments come alongside broader strategic moves, including the acquisition of properties in New Hampshire for nearly one million square feet of new chip fabrication capacity to support AI-related power delivery demand, as well as board approval of a $150 million share repurchase program in late August.

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