New to this? Read it in simple words
- Marvell, a chip company, wants to buy Lumentum, which makes lasers and optical parts.
- It will pay with its own shares, not with cash.
- The deal values Lumentum at $115 billion, including its debt.
- Marvell says AI data centres need more links that use light instead of copper.
- Optical link
- A connection that sends data as light through glass fibre, instead of electricity through copper.
- Enterprise value
- What a company is worth to a buyer, counting its shares and its debt.
- All-stock deal
- A purchase paid with the buyer’s own shares instead of money.
Reports of talks between the two companies first appeared in late October. On Monday they confirmed the deal, one of the largest technology deals of 2026, Reuters reports.
The terms
Lumentum makes lasers, optical parts and optical switches for AI data centres and networks. Its owners will get 4.5 Marvell shares for each share they hold.
At closing prices on October 28, that was about $1,132 a share, a premium of about 23.9%. Because the price is paid in shares, its real value moves with Marvell’s stock, CNBC notes.
The companies put Lumentum’s enterprise value, which includes debt, at $115 billion. Marvell’s owners would hold about 67% of the combined company, and Lumentum’s owners about 33%.
The terms the companies announced on November 2. Approvals still to come.
Why Marvell wants it
The companies say “the physical limitations of copper-based connectivity” are pushing data centres towards optical links. The Register explains that copper carries a 400 Gbps signal only about 1.25 metres, while light can carry it for kilometres.
“AI infrastructure is undergoing a fundamental architectural shift toward optical connectivity, creating an opportunity that comes along once in a generation,” Marvell CEO Matt Murphy said.
The companies say the deal will save more than $1 billion a year in costs, and will give them a market of $550 billion. Reuters sees it as a push against Broadcom, a larger rival in custom AI chips and networking.
Doubts and next steps
Marvell shares were down 8% during Monday’s trading, and Lumentum shares 13%, CNBC reported. “Investors are right to ask whether Marvell is paying too much,” Axel Rudolph of IG Group told Reuters.
Nvidia invested $2 billion in each company earlier this year, Reuters reports. Matt Murphy told CNBC that the deal is “a double down on supporting Nvidia”.
The deal needs the approval of both companies’ shareholders and of regulators. Matt Murphy will stay chairman and CEO, and three Lumentum directors, including CEO Michael Hurlston, will join Marvell’s board.
Sources
Every fact in this story comes from the sources below. Open them to check our work.
- 1Primary source · November 2, 2026Marvell and Lumentum to Combine, Creating a Category Leader in AI Connectivity Marvell Technology and Lumentum
- 2Research · November 2, 2026Marvell acquires Lumentum in $115 billion push to dominate AI connectivity Reuters, via Calcalist (CTech)
- 3Research · November 2, 2026Lumentum CEO touts ‘enormous’ opportunity in massive AI connectivity deal with Marvell CNBC
- 4Research · November 2, 2026Marvell wants to be a copper topper, bets $115B on photonics leader to push optical networking The Register
The terms come from the companies’ own announcement, and the reports agree with them. The cost savings and the market size are the companies’ claims.
Marvell agrees to buy Lumentum in a $115B bet on AI optics. Silicon AI News, November 3, 2026. https://siliconainews.com/stories/marvell-lumentum-115-billion-deal
Marvell’s $115 billion all-stock bet on optical AI links is a major growth deal, but both companies’ shares fell on Monday. How we rate the mood
The mood shows how the news frames the event for the tech and AI world: as an opportunity (6 and above) or as a loss (below 5). It is not our verdict on who is right.