Marvell Technology has agreed to buy Lumentum, a maker of lasers and optical components for data centres, in an all-stock deal valued at $115 billion including debt. The companies announced it on 2 November 2026. It is the largest deal yet driven by the demand for AI infrastructure, and it centres on a part of the AI boom that gets less attention than chips: the light-based links that join them together.
The terms
- Lumentum shareholders will receive 4.5 Marvell shares for each Lumentum share, worth about $1,132 per share.
- That is a premium of roughly 23.9% to each company's closing price on 28 October, the last trading day before speculation about a deal began.
- Marvell shareholders would own about 67% of the combined company and Lumentum holders about 33%.
- The equity value is $102.54 billion, according to Reuters. Bloomberg calls it the largest M&A deal of 2026 by that measure.
- Both boards approved unanimously. Marvell's Matt Murphy stays chairman and CEO, and three Lumentum directors, including its CEO Michael Hurlston, will join Marvell's board.
The companies expect more than $1 billion in annual cost savings and say the deal should add to Marvell's adjusted earnings per share in its first year after closing. One report says it is not expected to close until 2028, subject to shareholder and regulatory approvals.
Why optical links matter for AI
As AI data centres grow, the chips processing data need ever faster connections between them, inside racks and across whole buildings. Moving that data with light rather than electrical signals is faster and more energy efficient. Marvell, which designs chips and networking products and has a custom-chip agreement with Google, says AI infrastructure is going through a fundamental shift toward optical connectivity. It estimates the combined company's addressable market at $550 billion. Lumentum's revenue recently jumped 136.5% to $1.26 billion, according to The Motley Fool.
Marvell completed its purchase of photonics company Celestial AI in February for $3.5 billion, and the deal is its largest since its $10 billion purchase of Inphi in 2021. Nvidia made separate $2 billion investments in both Marvell and Lumentum earlier this year, which analysts read as a sign that securing the supply chain from chips to lasers is now a central competitive move.
The market's reaction
Investors were not enthusiastic. Marvell shares fell more than 10% on Monday, and Lumentum's stock also dropped, according to Yahoo Finance, as the all-stock structure left Lumentum holders exposed to Marvell's recent sell-off. Some investors are also uneasy about the scale of AI spending across the sector.
Why it matters
The deal is a large wager that spending on AI data centres will keep growing for years. It also signals that the bottleneck for AI is shifting from the chips themselves to the components and connections that let them work together. This article is a news report and not investment advice.
Sources: Marvell and Lumentum announcements and SEC filing; Reuters via Quartz; Investing.com; Fierce Network; Yahoo Finance; Dealroom; The Motley Fool.
