Marvell Technology on Tuesday unveiled a $115 billion deal to acquire optical components maker Lumentum, expanding its portfolio of AI chips and networking technology.
The all-stock transaction gives Lumentum shareholders 4.5 shares of Marvell common stock for each Lumentum share. Marvell shareholders will own approximately 67% of the combined company, with Lumentum shareholders holding the remaining 33% on a fully diluted basis.
The acquisition combines Marvell’s custom compute, switching and interconnect technologies with Lumentum’s lasers, optical transceivers and optical circuit switching products. The companies expect the combination to support more integrated optical connectivity as AI systems grow. At higher data rates, copper connections lose signal strength over distance and require additional processing that consumes power and generates heat, limiting bandwidth and connection density.
The acquisition combines Marvell’s custom compute, switching and interconnect technologies with Lumentum’s lasers, optical transceivers and optical circuit switching products. The companies expect the combination to support more tightly integrated optical connectivity as hyperscalers build larger AI systems and encounter the physical limits of copper connections.
“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 in the acquisition announcement.
Lumentum brings specialized compound semiconductor manufacturing capabilities, including indium phosphide (InP) fabrication and high-speed, high-power laser technology. Those assets give Marvell greater control over components used to move data through optical connections in AI systems.
The deal also changes Marvell’s position in the optical supply chain. The company sells merchant silicon to optical transceiver manufacturers, some of which could now compete with its Lumentum business.
Ron Westfall, vice president and practice lead for networking and infrastructure at HyperFrame Research, said the acquisition moves Marvell beyond its traditional fabless semiconductor model.
“From my perspective, Marvell strategically transitions from a fabless merchant silicon provider into a vertically integrated AI connectivity platform,” Westfall said.
The acquisition could reshape competition across the optical supply chain. Marvell would control more of the components used in AI connectivity, while existing merchant silicon customers could turn to independent suppliers such as Coherent to avoid relying on a competitor. Westfall said the combination also positions Marvell to compete more directly with Broadcom and challenge Nvidia’s NVLink ecosystem.
Marvell takes control of optical technology
Westfall said Lumentum’s InP fabrication facilities and continuous-wave laser technology address a difficult supply-chain constraint as AI clusters encounter copper’s physical limits at rack scale.
“This internal vertical integration enables extreme co-design across DSPs, electro-optic modulators, and laser light sources,” he said.
That integration could support development of co-packaged optics (CPO), optical circuit switching (OCS) and near-package optical interconnects. These architectures bring optical connectivity closer to processors and switches, reducing reliance on electrical connections for moving data across increasingly complex systems.
Westfall said the combination could also help Marvell capture more system-level revenue as optical architectures evolve, including designs that could reduce the role of traditional standalone digital signal processors.
Marvell said the combined portfolio will span scale-across, scale-out, scale-up and scale-in connectivity. The companies plan to bring together semiconductor design, advanced packaging and specialized manufacturing to develop optical products with higher bandwidth, performance and energy efficiency.
Merchant silicon customers could look elsewhere
The acquisition creates a potential conflict with Marvell’s existing customers. Optical transceiver manufacturers that buy Marvell’s digital signal processors and other merchant silicon could find themselves competing with a company that now owns Lumentum.
Westfall identified that commercial tension as a central risk.
“From my perspective, the key challenge is the commercial friction triggered with Marvell’s primary merchant DSP customers and transceiver partners, who find their critical silicon supplier transitioning toward a downstream competitor,” he said.
He said those customers could hedge against the change by directing business to independent suppliers.
“However, this vertical consolidation could also realign the ecosystem by disrupting Marvell's neutrality, incentivizing unaligned hyperscalers and merchant transceiver manufacturers to hedge against platform lock-in by funneling volume to independent competitors such as Coherent,” Westfall said.
The potential customer reaction creates a trade-off for Marvell: owning more of the optical supply chain could strengthen its position in AI connectivity, while concerns about competing with its customers could put some merchant silicon business at risk.
Marvell and Lumentum did not detail how they plan to manage relationships with existing transceiver customers or whether they will maintain separate commercial arrangements for those businesses.
Manufacturing adds execution risk
The acquisition also brings Marvell into a different kind of manufacturing operation. Marvell has historically operated as a fabless semiconductor company, relying on outside manufacturers to produce its chips. Lumentum operates capital-intensive compound semiconductor facilities, including InP fabrication.
Westfall cautioned that combining those operations could create manufacturing and cultural challenges.
“Moreover, the potential operational culture clash involves assimilating complex, capital-intensive compound semiconductor fabs into a historically fabless operating model, where any integration missteps or yield deficits across Lumentum’s indium phosphide foundries could threaten the execution timeline for emerging CPO platforms,” he said.
The companies have not disclosed specific production targets or product schedules for the combined optical portfolio.
$550 billion addressable market
Marvell estimates the combination expands its total addressable market to $550 billion. The company also expects more than $1 billion in annual run-rate cost synergies and said the transaction should be accretive to non-GAAP earnings per share in the first year after closing. Those are company projections.
The transaction follows Marvell’s expansion into optical interconnect technology, including its acquisition of Celestial AI. Lumentum adds laser production, optical transceivers, optical switching and InP manufacturing to that portfolio.
Westfall said the combination could put Marvell in more direct competition with Broadcom and challenge Nvidia’s NVLink ecosystem. The extent of that competition will depend on the products the combined company develops and whether hyperscalers adopt them.
The transaction has an implied enterprise value of $115 billion for Lumentum, representing a 23.9% premium based on the companies’ unaffected closing share prices on October 28.
Murphy will remain chairman and CEO of the combined company. Lumentum CEO Michael Hurlston and two other Lumentum directors will join Marvell’s board.
The boards of both companies approved the transaction. It remains subject to shareholder and regulatory approvals and other customary closing conditions. Marvell expects the deal to close in the first half of 2028.
Shane Snider is a senior news writer at TechTarget, covering AI infrastructure, hyperscale data centers, cloud platforms, and the power and energy systems driving modern compute expansion. You can reach Shane at [email protected] or on LinkedIn.
