Why Marvell is paying $115 billion for a laser maker
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Marvell Technology has agreed to acquire Lumentum in an all-stock deal that gives the optical components maker an implied enterprise value of $115 billion. It is a large bet on the connectivity hardware that links processors inside AI data centers.
Under the terms announced on Nov. 2, Lumentum stockholders will receive 4.5 Marvell shares for each Lumentum share they own. That works out to approximately $1132 per share, a premium of about 23.9% based on both companies’ closing prices on Oct. 28, the last trading day before market speculation about a deal began. Marvell stockholders will own about 67% of the combined company and Lumentum stockholders about 33%.
The companies expect the deal to close in the first half of calendar 2028, subject to stockholder votes, regulatory approvals, and other customary conditions. Matt Murphy will remain chairman and CEO, and 3 Lumentum directors, including CEO Michael Hurlston, will join a Marvell board that currently has 7 members.
For manufacturers, the more revealing detail sits behind the price: Lumentum’s own laser manufacturing.
AI data centers are running into the limits of copper
Marvell designs chips that move data around data centers, including electrical and optical interconnects, network switches, and custom processors for large cloud customers. Lumentum makes high-performance lasers, optical transceivers, and optical circuit switches, the parts that turn electrical signals into light and send them through fiber.
Both companies argue that the line between those 2 businesses is disappearing. Their announcement points to fast-growing bandwidth needs and the physical limits of copper wiring as the forces pushing AI infrastructure toward optics. As AI systems link more processors together, the industry is moving away from separate modular components and toward integrated optical systems where the electrical and optical parts are designed together.
Murphy described the change as “a fundamental architectural shift toward optical connectivity.” Hurlston framed the deal around meeting customers’ full interconnect needs, from today’s links between racks and data centers to tighter connections inside AI systems in future.
The combined company says this co-design approach should produce pre-validated optical products that carry more data, use less power, and reach customers faster. It also expects the deal to expand its total addressable market to $550 billion, a company estimate rather than a measure of current sales.
Lumentum brings specialist manufacturing Marvell does not have
This is where the deal becomes a manufacturing story.
Marvell’s core strength is chip design. Lumentum brings its own compound semiconductor manufacturing and process technology, including indium phosphide, a material used to make high-speed lasers for optical links. Compound semiconductors are made through different processes from the mainstream silicon (CMOS) chips that Marvell has made by contract foundries.
After closing, the combined company plans to bring together semiconductor design, advanced packaging, and specialized manufacturing. Its stated aims include deeper integration of different chip types, a stronger strategic supply position, and high-volume production of optical products.
For AI hardware buyers, the supply point may matter as much as the technology. Companies that control the capacity to make optical components at volume hold bargaining power as data center spending grows. With Lumentum, Marvell would bring laser production in-house.
Lumentum, headquartered in San Jose, California, operates R&D, manufacturing, and sales facilities worldwide. It also sells into telecom networks, industrial manufacturing, and sensing, markets that would come with the deal.
A long road to 2028 leaves plenty unresolved
The financial case rests on targets. The companies say they see a path to more than $1 billion in annual run-rate cost savings and expect the deal to add to Marvell’s non-GAAP earnings per share in the first year after closing. They also expect it to improve the combined company’s long-term revenue growth and margins.
None of that has been tested yet. The deal must clear stockholder votes and regulatory reviews, and a close in the first half of 2028 leaves well over a year for market conditions and the technology itself to move. Because Lumentum holders receive a fixed number of Marvell shares, the dollar value of the deal will also rise and fall with Marvell’s stock price.
Integration is another open question. Combining a chip designer with a business that runs its own specialist manufacturing means joining very different operating models, and the announcement does not set out how production will be organized after closing.
The bigger question is whether rivals follow. If tighter links between chips and optics become the standard design for AI systems, other chipmakers may decide they need their own optical manufacturing too. Marvell is betting that owning laser production will matter as much as designing the chips around it.
Source:
Marvell press release
