Marvell agrees to buy Lumentum in a $115B all-stock deal to combine AI chips and optics

What Marvell and Lumentum announced

Marvell Technology and Lumentum said on 2 November 2026 that Marvell will acquire Lumentum in an all-stock transaction. Marvell's announcement puts the implied enterprise value at about $115 billion, including debt. Lumentum stockholders will receive a fixed 4.500 Marvell shares for each Lumentum share, so the value of the offer moves with Marvell's share price until closing.

Current Marvell holders would own about 67% of the combined company on a fully diluted basis and Lumentum holders about 33%. Both boards approved the deal unanimously. It still needs votes by both sets of stockholders and regulatory clearances, and the companies expect it to close in the first half of 2028. Matt Murphy stays chairman and chief executive, and three Lumentum directors, including chief executive Michael Hurlston, will join Marvell's board, according to the announcement as reported by Quartz.

Other figures in circulation measure different things. An internal Lumentum message filed with the SEC on Form 425 describes the deal as worth approximately $100 billion, and Bloomberg put the equity value at roughly $102.6 billion. The companies say they expect more than $1 billion in annual run-rate synergies but have not broken that figure down.

Why chips and lasers are being combined

The deal joins two halves of the same data path. Marvell designs the silicon at each end of high-speed links: signal processors for optical modules, electro-optical interconnect chips, Ethernet switches and custom AI accelerators built with cloud companies. Lumentum makes the photonic side: lasers, optical transceivers and optical circuit switches that move data over fiber between servers and racks.

AI clusters spread work across tens of thousands of accelerators that exchange data constantly, and copper loses signal quickly at the highest speeds. The companies frame the merger around near-packaged and co-packaged optics, which put the optical engine next to or inside the chip package to cut power per bit. They estimate the combined business addresses a market worth $550 billion by 2030, a vendor projection without a published method. Murphy called the deal an opportunity that comes along once in a generation, and Hurlston told CNBC it is an enormous opportunity to meet the connectivity needs of the AI buildout.

It extends a direction Marvell had already taken: in December 2025 it agreed to buy Celestial AI, a startup working on photonic interconnect.

How investors reacted

Both stocks fell. Reported declines for Marvell on 2 November ranged from about 5% in early trading to roughly 13%, depending on the time measured, and Lumentum fell further because the fixed ratio ties it to Marvell's price. Bank of America and TD Cowen downgraded Marvell, according to Investing.com. Bank of America argued that $1 billion in synergies does not offset an increase of about 50% in the share count and flagged possible conflicts with customers who buy from rivals of either company. TD Cowen worried the deal comes near the top of an optical spending cycle. UBS kept a buy rating.

The size stands out against other AI deals tracked here. Salesforce agreed to buy Braze for about $5.66 billion in October. The deal also sharpens competition with Broadcom, which reported $16.7 billion in AI chip revenue last quarter, and with NVIDIA's networking products. More deals are in the AI Business hub and the AI funding tracker.

What to watch next

Competition reviews come first. Both companies sell into the United States, China and Europe, and the announcement does not list the approvals needed or say whether conditions are expected. The registration and proxy filings for the stockholder votes should give the negotiation history, fairness opinions, projections and any break fees, none of which is public yet.

Customers have not commented in the coverage reviewed here. Until closing the two companies must operate independently, so joint products such as a co-packaged module with Marvell silicon and Lumentum lasers are unlikely to be sold as one offering before 2028. Not stated so far: how the synergies break down, whether the agreement includes a price collar and what happens to overlapping products and sites.

Questions people ask

How much is Marvell paying for Lumentum?

The deal is all stock: 4.5 Marvell shares for each Lumentum share, which the companies put at about $115 billion in implied enterprise value. A Lumentum filing describes it as about $100 billion, a figure consistent with equity value.

When will the Marvell and Lumentum deal close?

The companies expect it to close in the first half of 2028, after stockholder votes at both companies and regulatory approvals.

Who will run the combined company?

Matt Murphy stays chairman and CEO. Three Lumentum directors, including CEO Michael Hurlston, will join Marvell's board.

Why did Marvell stock fall after the announcement?

Analysts focused on dilution from issuing new shares and on possible conflicts with customers. Bank of America and TD Cowen downgraded the stock, according to Investing.com.

Sources

1. Marvell and Lumentum to Combine, Creating a Category Leader in AI Connectivity (Marvell Technology, 2 Nov 2026)
2. Lumentum Holdings Inc. Form 425 (SEC EDGAR, 2 Nov 2026)
3. Lumentum CEO touts 'enormous' opportunity in massive AI connectivity deal with Marvell (CNBC, 2 Nov 2026)
4. Marvell to Acquire Lumentum in $115 Billion All-Stock Deal Focused on AI (Bloomberg, 2 Nov 2026)
5. Marvell agreed to buy Lumentum in $115 billion all-stock deal (Quartz, 2 Nov 2026)
6. Analysts downgrade Marvell and slash price targets over Lumentum deal (Investing.com, 3 Nov 2026)