Marvell Technology’s proposed $115 billion acquisition of Lumentum Holdings marks a major bet on the infrastructure powering artificial intelligence, as chipmakers race to build faster and more efficient connections for increasingly large data centres.
Announced on November 2, the all-stock transaction will bring together Marvell’s semiconductor and interconnect technology with Lumentum’s expertise in optical components, lasers and photonic systems. The companies believe the combination will strengthen their ability to supply the high-speed links needed to connect thousands of processors inside and across AI data centres.
The deal values Lumentum at an implied enterprise value of $115 billion, including debt, while its equity value is about $102.5 billion. Under the agreement, Lumentum shareholders will receive 4.5 shares of Marvell common stock for every Lumentum share they own. Based on the companies’ unaffected closing prices on October 28, before reports of a possible transaction emerged, the offer represented around $1,132 for each Lumentum share and a premium of approximately 23.9%.
Marvell shareholders are expected to own about 67% of the combined company after closing, with Lumentum investors holding the remaining 33%. The agreement has unanimous board approval but still requires shareholder and regulatory clearances. The companies expect the acquisition to close in the first half of 2028, subject to other customary deal-closing conditions.
The strategic logic behind the deal lies in a shift taking place inside the AI industry. As companies train and run more powerful AI models, data centres need to move enormous volumes of information between processors at very high speeds. Traditional copper-based connections face physical limits over distance and bandwidth. Optical technology, which uses light to transmit data, is increasingly seen as a way to overcome those bottlenecks while improving performance and power efficiency.
Marvell supplies custom chips, networking and electrical and optical interconnect technologies used in data-centre infrastructure. Lumentum, meanwhile, makes high-performance lasers, optical transceivers and optical circuit switching systems. It also brings specialist manufacturing capabilities, including indium phosphide semiconductor technology, used in high-speed optical devices.
By combining these capabilities, the companies want to offer customers a more integrated portfolio covering connections within semiconductor packages, between servers and across distributed data centres. The aim is to design electrical and optical components together rather than treating them as separate parts. This could help customers improve bandwidth, reduce power consumption and bring new AI systems to market faster.
Marvell and Lumentum estimate that the combined business could address a total market worth about $550 billion. They also see an opportunity to generate more than $1 billion in annual cost synergies once the integration is completed. Marvell expects the deal to improve its long-term revenue growth and adjusted gross and operating margins, and to add to non-GAAP earnings per share in the first year after closing.
Marvell chief executive Matt Murphy will remain chairman and CEO of the combined company. Three members of Lumentum’s board, including its chief executive Michael Hurlston, are expected to join Marvell’s board after completion.
The $115 billion enterprise valuation is more than ten times the value of Marvell’s previous largest acquisition, its $10 billion purchase of Inphi in 2021. The deal significantly expands Marvell’s scale and ambitions in AI hardware, where it is seeking to compete more directly with larger players such as Broadcom.
Investors, however, responded cautiously to the announcement. Marvell shares fell sharply on November 2, with reports putting the decline at more than 10% during the session, while Lumentum shares also dropped by around 15% or more. The reaction reflected concerns about the price Marvell is paying, the risks of using its own stock as currency and whether the expected growth in AI infrastructure will justify such a large investment.
The fixed exchange ratio means the value received by Lumentum shareholders will move with Marvell’s share price. Although they are due 4.5 Marvell shares for each Lumentum share, the dollar value can change before closing. This has become an immediate concern after the sell-off.
Alongside the announcement, Marvell said preliminary fiscal third-quarter 2027 revenue was in line with earlier guidance and that it had narrowed the expected range around its forecast midpoint. Lumentum separately reported first-quarter fiscal 2027 revenue of about $1.26 billion, up 136.5% year-on-year.
The deal highlights how the AI boom is reshaping semiconductors beyond processors. As computing capacity expands, moving data quickly and efficiently is becoming as important as the chips doing the calculations. Marvell is betting optical connectivity will become central to future data-centre growth. The acquisition’s success will depend on integration, customer demand and continued AI infrastructure spending.