Vicor delivered its most impressive operating quarter in years and still fell short on the line many traders were watching. Third-quarter earnings of $1.33 per share missed the $1.39 consensus estimate and the $1.60 Earnings Whisper number, a 16.9% shortfall against expectations. Revenue told a different story: $197.11 million beat the $187.2 million consensus by 5.3% and grew 78.5% year over year, while EPS grew 111.1%. The central tension is that the top line and gross margin blew through expectations, but a jump in legal-driven operating expense, a normalized tax rate and a guided sequential revenue dip in Q4 kept the bottom line, and the near-term trajectory, from matching the hype.
The quality of the quarter is high in most respects. Revenue rose 37.5% sequentially from $143.4 million, far ahead of the roughly 10% sequential increase, or about $158 million, that management had pointed to on the Q2 call. Gross margin expanded to 68.3% from 58.0% in Q2 and 55.2% in Q1, approaching the 70% long-term model management has laid out. Royalty revenue more than doubled sequentially to $66.6 million, while product revenue reached $130.5 million. Advanced products climbed 47.5% to $138.9 million and Brick products rose 18.4%. Operating cash flow doubled to $69.7 million and cash grew to $513.1 million. The miss came below gross profit. Operating expenses rose 29.6% to $62.5 million, with SG&A up to $38.6 million from $22.7 million a year ago, as contingency fees to law firms enforcing Vicor's patents jumped to $16.1 million from about $5 million in Q2. The tax rate also normalized to 19.6% after benefits in prior quarters, and the diluted share count rose to 47.6 million from 44.9 million a year earlier.
The call reinforced that the business is changing structurally. Management is now explicitly framing royalties as recurring rather than episodic. Vicor granted its first pure VPD license to an AI OEM at Stage-2 rates, followed by another significant license purchase order from the same licensee early in Q4. Two hyperscalers have inquired about all-inclusive licenses, and the ITC's decision to institute a VPD infringement investigation, in which Vicor is seeking a limited exclusion order, gives the licensing campaign real leverage. On the product side, Q4 opened with $100 million of bookings in two weeks, including a large second-generation VPD order from the lead customer. The leading ATE customer now generates more than $100 million annually and is discussing capacity reservations.
The bears have legitimate ammunition, however. Q3 royalties included a partly non-recurring catch-up, and management set a Q4 royalty floor of at least $43 million. Paired with product revenue growth of roughly 10%, that implies total revenue of about $186 million, a sequential decline. Backlog reached a record $406 million, but growth slowed to 7% sequentially from 26% in Q2 and 70% in Q1, and backlog stood near $400 million at the call date. Capacity is becoming the binding constraint. Fab 1 is nearing full utilization, which limits new second-gen VPD engagements for roughly a year, until initial Fab 2 equipment arrives in Q2 2027. The purchase of sites for Fab 2 and Fab 3, targeting more than 5x Fab 1 capacity, is strategically bold and self-funded. Its capex has not been quantified, though. Legal fees are expected to run around 20% of royalty revenue, and two-year all-inclusive licenses expiring around end-2027 add renewal risk.
The guidance path still points higher. The full-year outlook has moved from about $570 million after Q1, to more than $600 million after Q2, to an implied figure near $640 million now.
The market setup is more complicated than the revenue beat implies. Shares closed at $190.68 ahead of the report, down 13.4% since the open following the July release and 14.9% below the 200-day moving average of $223.97. More striking, the stock hit $331 on October 1 and gave back 42.4% of that level within weeks. It now sits just 10.5% above its September low. Investor sentiment improved from slightly negative to slightly positive, a modest shift that leaves expectations roughly balanced rather than euphoric. The Earnings Whispers trend readings show sequential growth and momentum positive, while AVWAP remains negative, consistent with the post-spike unwinding.
The bottom line is that Vicor's quarter strengthened the long-term thesis: margins near target, a licensing engine gaining legal teeth, and demand that justifies a multi-fab buildout. The EPS miss against a lofty whisper, rising enforcement costs, a likely Q4 revenue dip and a year of capacity constraints give skeptics enough near-term friction to keep the stock's recent volatility in play.