Marvell Technology has launched one of the technology sector’s largest-ever acquisition bets, agreeing on Monday to buy optical-components maker Lumentum in an all-stock transaction with an implied enterprise value of $115 billion.¹

The strategic logic is straightforward: AI systems are becoming too large and power-hungry for conventional electronic connections alone. Marvell, which sells networking and AI chips, argues that the next generation of data centers will rely increasingly on optical networking—using light to move vast quantities of data among chips and systems. The combined company would bring electrical and optical technologies under one roof as customers build out infrastructure for training and running large language models.²

Marvell Chairman and Chief Executive Matt Murphy framed the moment as a structural turning point. “AI infrastructure is undergoing a fundamental architectural shift toward optical connectivity,” he said, calling it a “once in a generation” opportunity and arguing that early movers could “set the standard for decades to come.”²

The deal extends a strategy Marvell has pursued since Murphy became CEO in 2016: growth through acquisitions. Earlier this year, it closed a multibillion-dollar purchase of optical-interconnect startup Celestial AI. Lumentum, meanwhile, has more than doubled in value in 2026, while Marvell’s market capitalization has more than tripled over the past three years amid enthusiasm for AI.¹

But the transaction also puts a market test on that optimism. Lumentum holders will receive 4.5 Marvell shares for each of their shares, meaning the ultimate value rises or falls with Marvell’s stock. Shares in Marvell fell 3% and Lumentum slipped about 4% before the bell after the announcement, as investors weighed the deal against concerns over the durability of AI infrastructure spending.²

The companies expect to close in the first half of 2028. By then, Marvell will need to show that the optical future it is buying is not merely plausible, but profitable.