Vicor's AI Power Surge Meets Valuation Reality

What happened

Vicor reported blowout second-quarter results with revenue up 49% year-over-year to $143.4 million, driven by a 194% surge in royalty revenue and a 32% increase in product sales, while backlog soared 145% to $379 million. This performance validates the company's AI power delivery moat, but the stock already trades at 70.9x earnings and 80.9x EV/EBITDA, leaving little margin for error. Royalty revenue, while impressive at $30.4 million in Q2, is usage-based and inherently lumpy, with one customer accounting for 11.1% of 2025 revenue and concentration expected to increase. Capacity remains a bottleneck: management is only 'taking steps toward' a second fab, and the first fab is already being absorbed, which could cap shipment growth. The Seeking Alpha article emphasizes the AI supply chain positioning, but the master report cautions that proof of durable royalties, backlog conversion, and capacity expansion is still needed before the stock offers a compelling entry.

Implication

The stock's valuation leaves more downside than upside if expectations reset, with a trim above $260 and attractive entry near $175. Key checkpoints are Q3 royalties above $25 million, backlog above $350 million, and a dated Fab 2 plan. If these fail, multiple compression is likely, potentially pushing shares toward the bear case of $160. If they hold, the story shifts from promise to proof, but even then, current price of $214.7 is above the base-case implied value of $225. Maintain a WAIT rating while monitoring execution, with a re-assessment window of 3-6 months.

Thesis delta

The thesis remains unchanged: Vicor's technical moat is real, but the market already prices in successful execution. The latest results strengthen the demand signal, but capacity and royalty durability risks persist, so no upgrade from WAIT.