On May 26, Vicor Corporation rose 6.63% in pre-market trading, trading at $290.0/share, with trading volume of approximately $1.54 million.

On the news front, the company announced an upward revision to its Q2 revenue guidance, citing rising product revenues and royalties from an additional licensee to its patented power technology portfolio. This guidance raise comes on top of a strong FY26Q1 earnings report in which both revenue and earnings per share exceeded market expectations, with capacity expansion progress ahead of schedule and the successful onboarding of Cerebras as a core incremental customer.

The stock had previously surged over 13% on May 11 following the earnings release, before pulling back over multiple sessions due to concentrated insider selling by directors including Tuozzolo Claudio at approximately $270 per share. After sustained profit-taking pressure was absorbed, the stock entered a technical recovery phase, with the fresh guidance upgrade providing additional upside catalyst.

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