Marvell to Buy Lumentum for $115B in All-Stock AI Optics Deal
3 min readMarvell Technology has agreed to acquire Lumentum in an all-stock deal that values the laser and optics maker at an enterprise value of $115 billion. Announced on November 2, the Marvell Lumentum deal is a bet that the next phase of AI infrastructure will be won in optical connectivity, not just in the chips that do the computing.
Why the Marvell Lumentum deal is about AI optics
Marvell builds the custom accelerators, switches, and interconnect silicon that hyperscalers use inside AI data centers. Lumentum makes the other half of the link: high-performance lasers, optical transceivers, optical circuit switches, and the indium phosphide compound semiconductors they are built on. As clusters scale to hundreds of thousands of GPUs, copper runs out of reach, and the links between racks, and increasingly inside them, move to light.
Marvell CEO Matt Murphy described the shift plainly: AI infrastructure is moving toward optical connectivity, “creating an opportunity that comes along once in a generation.” Owning both the electrical and the optical sides lets Marvell co-design them together instead of sourcing lasers from a supplier.
The terms
Lumentum shareholders will receive 4.5 Marvell shares for each Lumentum share, which works out to roughly $1,132 per share and a 23.9 percent premium to Lumentum’s close on October 28, the last trading day before deal speculation surfaced. Marvell shareholders will own about 67 percent of the combined company and Lumentum holders the remaining 33 percent. Both boards approved the deal unanimously.
Murphy stays on as chairman and CEO. Three Lumentum directors, including CEO Michael Hurlston, join Marvell’s board. Hurlston said the combination creates a company “uniquely positioned to capitalize on a market opportunity of $550 billion.” The companies also claim line of sight to more than $1 billion in annual cost synergies, and Marvell expects the deal to add to non-GAAP earnings per share in the first year after closing, which is targeted for the first half of 2028 pending shareholder votes and regulatory approvals.
Why it matters
At $115 billion, this would rank among the largest semiconductor acquisitions ever announced, well above AMD’s purchase of Xilinx. It also lands in the same week that Oracle raised $20 billion in stock and debt to fund its AI buildout, with investors increasingly skeptical of AI capital spending. Marvell is wagering that whoever wins the model race, the fabric connecting the GPUs still has to be built, and that the optical layer is where the margin is heading.
The companies that shape the optical supply chain, including Broadcom, Coherent, and Nvidia with its co-packaged optics push, now face a far larger rival. Watch for regulatory reviews in the US, Europe, and China, since the closing window runs well into 2028.
For networking engineers, the message is simple: the data center interconnect is becoming one integrated product, from serializer to laser. Marvell just paid up to own the whole path.