Marvell's $115 Billion Lumentum Deal Is Official — And Both Stocks Fell

Marvell Technology confirmed on Monday, November 2, that it will buy Lumentum in an all-stock deal valued at $115 billion including debt — and both stocks fell. Lumentum holders will get 4.5 Marvell shares for each share they own, worth about $1,132 a share. That is a 23.9% premium to Lumentum's October 28 close, the last day before deal talk leaked. The official price is far above the roughly $83 billion figure reported last week, which is why the announcement dominated market talk on Monday morning.

What happened, in direct terms

Marvell, which designs custom chips and networking gear for data centers, agreed to acquire Lumentum, which makes lasers and optical parts that move data between AI chips. Both boards approved the deal unanimously. After it closes, Marvell holders will own about 67% of the combined company and Lumentum holders about 33%, on a fully diluted basis. The equity value alone is $102.54 billion, with the $115 billion headline including debt.

The deal is not quick. The companies expect it to close in the first half of calendar 2028, and it still needs approval from both sets of shareholders and from regulators. Marvell chief executive Matt Murphy, who will stay on as chairman and CEO, called the shift to optical connectivity an opportunity that "comes along once in a generation." Three Lumentum directors, including its CEO Michael Hurlston, will join the combined board.

Why it is blowing up

First, the size. Reuters described it as one of the largest technology transactions of 2026, and it would be Marvell's biggest purchase by far — dwarfing its $10 billion Inphi deal in 2021 and its recent Celestial AI photonics deal. Second, the timing. It lands in the middle of an AI chip selloff, after Intel's weak forecast on Friday and a brutal October in which investors started asking whether huge AI spending will earn its keep.

Third, the reaction. A takeover target usually jumps on a 23.9% premium. Lumentum fell instead in Monday trading, and Marvell fell too. TipRanks put Marvell down more than 2% and Lumentum down more than 3% in early trading, while other reports showed larger falls after the open. Because Lumentum holders are being paid in Marvell stock, not cash, the value they actually receive moves with Marvell's share price — so when Marvell slides, the deal is worth less on paper, and Lumentum trades at a discount to that moving target.

Why Marvell wants Lumentum

The logic is about a bottleneck. As AI clusters get bigger, copper wiring struggles to move data fast enough without using too much power. Optical links — sending data as light — solve that, and Lumentum sits right on that chokepoint. Marvell already buys lasers from Lumentum. Owning the supplier gives it direct access to scarce parts and factories, and a stronger hand against larger rival Broadcom, which can offer customers a broader bundle of AI hardware under one roof.

Demand is not the problem. Lumentum's fiscal first-quarter revenue rose about 136% from a year earlier to $1.26 billion, with adjusted earnings of $4.57 a share beating the $4.22 analysts expected. For the next quarter it guided to $1.575 billion to $1.625 billion in revenue, above the $1.48 billion average estimate. Hurlston said its optical parts are sold out through early 2029 and that it cannot meet about 70% of demand for some products next year, with some customers already ordering for 2030. The companies say the combination expands their addressable market to $550 billion and that they see more than $1 billion a year in cost savings.

What's next

Expect a long, noisy road to 2028. Shareholders of both companies must vote, regulators in the U.S. and elsewhere must clear a deal of this size, and the all-stock structure means every swing in Marvell's price reprices the deal until it closes. Marvell has also set big targets of its own — $20 billion in fiscal 2028 revenue and $70 billion to $90 billion by fiscal 2031 — so investors will judge this purchase against whether AI data-center spending keeps growing fast enough to fill the capacity both companies are racing to build. For now, Monday's falls say the market fears the price, dilution and wait more than it likes the logic.

Sources: Reuters via CTech, The Motley Fool, TipRanks, Invezz. This post reports what happened and how markets reacted; it is not financial advice.

FAQ

How much is Marvell paying for Lumentum?

The deal is valued at $115 billion including debt, or $102.54 billion in equity value. Lumentum holders get 4.5 Marvell shares per share, worth about $1,132 a share at announcement.

Why did both Marvell and Lumentum stocks fall?

Investors questioned the price, the dilution from paying entirely in stock, and AI spending more broadly. Because the payment is in Marvell shares, Lumentum's implied deal value falls when Marvell's stock falls.

When will the Marvell-Lumentum deal close?

The companies expect it to close in the first half of calendar 2028, after shareholder votes and regulatory approvals. Both boards have already approved it unanimously.

What does Lumentum make?

Lumentum makes lasers and optical components that link AI chips and servers inside data centers. Its latest quarterly revenue rose about 136% to $1.26 billion, and its parts are sold out through early 2029.