Marvell Technology announced on Monday that it will buy optical components maker Lumentum in an all-stock deal with an enterprise value of 115 billion dollars, including debt. It is one of the biggest technology deals of 2026, and among the boldest bets yet that the artificial intelligence spending boom will last for years — not on faster chips alone, but on the light-based connections that move data between them.
Under the agreement, Lumentum shareholders will receive 4.5 Marvell shares for each share they own, worth about 1,132 dollars a share based on closing prices on October 28, the last trading day before reports of the talks leaked. That is a premium of 23.9 percent. When the deal closes, Marvell shareholders will own about 67 percent of the combined company and Lumentum shareholders about 33 percent. Both boards approved the transaction unanimously, and Marvell chief executive Matt Murphy will remain chairman and chief executive.
The logic is about a bottleneck. AI clusters now link thousands of processors, and as those clusters grow, copper wiring is hitting physical limits on speed, reach and power. More of that traffic is shifting to optical links, which carry data as light. Marvell brings electrical and optical interconnect, network switching and custom AI processors. Lumentum brings high-performance lasers, optical transceivers, optical circuit switching and specialized compound semiconductor manufacturing, including indium phosphide.
“AI infrastructure is undergoing a fundamental architectural shift toward optical connectivity, creating an opportunity that comes along once in a generation,” Murphy said in the announcement. “The companies that move first and help define this transition will set the standard for decades to come.”
The deal is also a direct challenge to larger rival Broadcom, which can offer customers a broader menu of AI data center hardware under one roof. Marvell said the combination expands its total addressable market to 550 billion dollars, delivers more than 1 billion dollars in annual cost synergies, and adds to earnings per share in the first year after closing. It is Marvell’s largest acquisition since its 10 billion dollar purchase of Inphi in 2021, and it follows its 3.5 billion dollar purchase of Celestial AI, which closed in February. Notably, Nvidia invested 2 billion dollars in each company earlier this year.
Investors, however, were not immediately sold. In late morning trading on Monday, Marvell shares slid more than 6 percent and Lumentum fell more than 11 percent, according to Investor’s Business Daily. Wedbush analyst Matt Bryson questioned whether regulators will approve the deal, pointing to tight laser supply, the fact that Lumentum also supplies Marvell’s competitors, and China’s reluctance to approve large technology combinations. Mizuho analyst Vijay Rakesh was more positive, calling the combined company an optical networking powerhouse, while noting investor concerns about dilution.
None of that will be settled quickly. The deal is not expected to close until the first half of 2028, and it still needs approval from both companies’ shareholders and from regulators. Until then, the headline value will move with Marvell’s share price, because the exchange ratio is fixed. What is already clear is the direction of travel: the race to build bigger AI systems is increasingly a race to move data faster, and Marvell just paid a record price to own more of that road.