Vicor's patent fight is setting the price of the $233 million power layer Navitas just bought

Navitas Semiconductor▼−5.58% — Navitas Semiconductor, down 5.58 percent today, a maker of gallium-nitride power chips, closed its purchase of Claros on October 6, 2026, paying about $232.8 million↗ for a developer of integrated voltage regulators, the converters that sit closest to an AI processor ¹. Three days later the US International Trade Commission voted to investigate vertical power delivery↗, the hardware that pushes thousands of amps through the last millimetres of a rack, on a complaint from Vicor▼−8.35% — Vicor, down 8.35 percent today, a Massachusetts power-module maker ². A day before Navitas closed, German rival Infineon bought into the same layer ¹.

The bottleneck in AI power has moved beneath the processor

The rebuild runs from the grid to the chip. Racks are moving to 800-volt DC distribution, and Navitas already builds the NVIDIA▲+0.35% — NVIDIA, up 0.35 percent today co-developed board we covered earlier this week, converting 800 volts to 12 in a single stage on the compute motherboard ⁵. The stage after that is the hard one: conventional regulator modules push power sideways across the board, while Claros puts the converter beneath or inside the processor package, cutting the distance current travels from inches to millimetres ¹.

Infineon's target, C2i Semiconductors, makes the multiphase controllers for the same final conversion ¹. Two incumbents buying the same link within a week is the industry naming its next constraint.

Vicor claims that link, and it has collected before

Vicor filed its complaint on September 9, and the Commission's vote named a directory of AI rack manufacturing: Foxconn▲+1.88% — Foxconn, up 1.88 percent today, Quanta, Delta, Celestica▼−2.62% — Celestica, down 2.62 percent today and Flex▼−5.46% — Flex, down 5.46 percent today, plus Infineon and Monolithic Power Systems▼−0.26% — Monolithic Power Systems, down 0.26 percent today ². Navitas is not a respondent, but its route into AI racks runs through companies that are. Vicor says any OEM or hyperscaler importing systems built on respondents' parts needs a license↗ ³.

Vicor's published royalty escalator climbs from 1X toward 7X↗ as enforcement reaches an import ban enforced by US Customs ⁴. An earlier Vicor case ended in exactly such a ban, and in September 2026 Vicor signed its first vertical-power license with a leading AI OEM ⁴. Navitas has bought into a layer whose price someone else is setting.

Two earnings calls will show whether the layer pays

Vicor reports third-quarter results on October 20, 2026↗, its first since the case began ⁷. Navitas follows on November 3 with a harder job: turning summit showcases into order backlog ⁶⁹. Short interest sits near a fifth of its tradable float ⁶. The stock still commands more than 70 times sales while quarterly revenue keeps shrinking as the consumer business it abandoned winds down ⁶⁸.

Cash above half a billion dollars covers the wait ⁸. The $8 billion market Claros is meant to unlock by 2030 is a company estimate, with no customers or production dates attached ¹. The patent fight sets part of the price of that rebuild: builders who use the respondents' parts face Vicor's escalating royalties, and that bill lands on the layer Navitas just bought.