Marvell Technology has unveiled one of the semiconductor industry’s largest AI-era wagers: an all-stock acquisition of optical-components maker Lumentum with an implied enterprise value of roughly $115 billion.¹

The announcement, made Monday, puts optical connectivity at the centre of Marvell’s strategy for the data centres powering large-language models. As AI systems grow larger and their chips are spread across increasingly complex networks, conventional electrical connections are facing greater pressure on speed, distance and power use.

Marvell’s argument is that the next crucial bottleneck is not only computing silicon, but the links between it. “AI infrastructure is undergoing a fundamental architectural shift toward optical connectivity, creating an opportunity that comes along once in a generation,” Chairman and CEO Matt Murphy said. “The companies that move first and help define this transition will set the standard for decades to come.”²

Under the fixed-ratio agreement, Lumentum shareholders would receive 4.5 Marvell shares for each of their shares. Because no cash is involved, the ultimate value moves with Marvell’s stock price. The companies expect the transaction to close in the first half of 2028, subject to approvals.²

The deal follows Marvell’s multibillion-dollar purchase this year of Celestial AI, another optical-interconnect specialist. Together, those moves suggest Marvell is trying to assemble a broader electrical-and-optical portfolio before AI customers settle on the standards that will govern the next generation of data centres.

It is also a conspicuously bold call amid mounting questions over whether the breakneck pace of AI infrastructure spending can last. Markets offered a cautious first verdict: Marvell shares fell 3% before the bell, while Lumentum dropped about 4%.²