Custom chip designer Marvell Technology has agreed to acquire optical component maker Lumentum in an all-stock deal with an enterprise value of $115 billion including debt — one of the largest acquisitions in technology history, and a massive bet that AI data centers will need ever more optical connectivity.
Under the terms announced Monday, Marvell will exchange 4.5 shares of its common stock for each Lumentum share, valuing the optical chip and networking equipment maker at an equity value of roughly $80 billion, as reported by TechCrunch, the Wall Street Journal and Reuters. For more context on this story, see our ongoing latest AI developments.
Bigger Than Activision, Bigger Than EMC
The deal's scale places it among the largest technology acquisitions ever completed or proposed. It dwarfs Microsoft's $68.7 billion purchase of Activision Blizzard in 2022 and Dell's $67 billion acquisition of EMC in 2016 — long the benchmarks for mega-scale tech M&A.
The market's initial reaction was skeptical. Both stocks fell on the news, with Yahoo Finance reporting both companies' shares tanked as investors weighed the price. MarketWatch noted the deal is giving traders flashbacks to the dot-com bubble, when telecom-equipment makers traded at giant valuations before the sector collapsed. Barron's published a column asking whether Marvell is making a "$115 billion mistake," and Seeking Alpha downgraded Lumentum, calling the deal a costly error for the acquirer.
Nvidia Owns Stakes in Both Sides
One unusual detail ties the deal together: Nvidia is a major shareholder of both companies. In March, the GPU giant invested $2 billion in Lumentum as part of a multi-year agreement to purchase the company's advanced laser components, supporting its R&D and fab expansion. The same month, Nvidia put $2 billion into Marvell to bolster its optical networking and chip portfolio.
That makes the merger, in effect, a consolidation of two Nvidia-backed suppliers — and underlines how the AI leader's capital has spread through the entire supply chain that feeds its data centers.
The AI Connectivity Thesis
Marvell's rationale is that AI clusters are becoming as much an optical networking problem as a compute problem. As data centers scale to hundreds of thousands of accelerators, moving data between racks — and between buildings — depends on lasers, optical transceivers and high-speed interconnects, precisely Lumentum's specialty.
With Lumentum, Marvell says it will become a leader in AI connectivity, with products ranging from chips to complete data center interconnect. Lumentum's chief executive touted an "enormous" opportunity in the combined company's AI connectivity business, according to CNBC. Investor's Business Daily summarized the deal as "creating AI connectivity leader."
The acquisition also deepens Marvell's position in custom silicon. The company already designs custom AI accelerators for hyperscale customers — it signed a high-profile agreement with Google to help build custom TPU chips, a deal that came with a warrant worth up to $12.2 billion for Marvell.
Timing and Conditions
The transaction is expected to close in the first half of calendar year 2028, subject to approval by both companies' shareholders and by regulators. That long runway reflects the scale of antitrust scrutiny the deal will attract — a combination of two critical AI supply-chain vendors will draw attention from competition authorities in the United States, Europe and Asia.
What Lumentum Brings to the Table
Lumentum is one of the principal suppliers of the optical layer that modern data centers run on: lasers, photonic components and transceivers that convert electrical signals into light and back again, carrying data between servers, racks and separate buildings. Those components have quietly become a bottleneck resource in the AI buildout, because the fastest way to move the enormous volumes of data generated across AI clusters is optical fiber — copper links run out of bandwidth and generate too much heat at the distances modern campuses demand.
Demand from cloud and AI customers has reshaped the company's business, and Lumentum's chief executive framed the merger as a way to capture that opportunity at greater scale. For Marvell, which already sells custom AI accelerators and networking silicon to hyperscalers, owning the optical stack means it can offer customers a more complete package: compute, switching and the fiber-optic connectivity that binds a data center campus together.
The timing is notable. Two of the industry's most influential companies — Nvidia through its investments, and Google through its custom chip agreement with Marvell — have spent 2026 building financial stakes in the supply chain they depend on. A combined Marvell-Lumentum gives those players a larger, more integrated counterparty, and gives the merged company more leverage in a component market that has been supply-constrained through the AI boom.
Reuters characterized the deal as Marvell "doubling down on the AI boom" at considerable cost. The bet is straightforward: even if individual AI projects fail, the physical build-out of AI infrastructure — GPUs, custom accelerators, and the optical fabric that connects them — is a multi-decade construction project, and the companies that own its key components intend to capture the value. Whether $115 billion was the right price for that thesis is what shareholders on both sides will now decide.
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