Marvell bets $115 billion in stock on Lumentum to own AI optics

Marvell Technology has agreed to acquire Lumentum in an all-stock deal that values Lumentum at an implied $115 billion, according to Marvell’s announcement. Reuters also reported the deal as a bet on AI data centers.

Fixed exchange ratio, no cash, closing in 2028

Each Lumentum share converts into 4.500 Marvell shares. Marvell puts that at about $1,132 per Lumentum share, a premium of roughly 23.9% against closing prices on October 28, 2026. After closing, Marvell stockholders would own about 67% of the combined company and Lumentum stockholders about 33%, on a fully diluted basis.

Matt Murphy stays chairman and CEO. Three Lumentum directors, including Lumentum CEO Michael Hurlston, join Marvell’s board, which has seven directors today. Both boards approved the deal unanimously. It still needs approval from both sets of stockholders and from regulators. Marvell expects to close in the first half of calendar 2028 and will file a Form S-4 with a joint proxy statement.

Marvell says it sees more than $1 billion in annual run-rate cost synergies. It expects the deal to add to long-term revenue growth and to gross and operating margins, and to be accretive to non-GAAP earnings per share in the first year after closing. The release names no cash component and no separate financing.

Lasers and switches join custom silicon

Marvell sells electrical and optical interconnect, switching and custom silicon. Lumentum brings lasers, optical transceivers and optical circuit switching, plus indium phosphide and high-power laser manufacturing. The companies say they want to offer co-designed, pre-validated optical products across what they call scale-across, scale-out, scale-up and scale-in connections, from links between distributed data centers to links between packaged chips. They put the combined addressable market at $550 billion.

Murphy framed the timing as a race: "The companies that move first and help define this transition will set the standard for decades to come." Hurlston said joining Marvell positions the company to capture a market opportunity of $550 billion.

A stock deal that tests investor patience

The market had already priced in the talks. Bloomberg reported on October 28 that the two companies were in advanced talks. According to 24/7 Wall St., Marvell shares fell 13% and Lumentum rose 6% on the report. Press accounts at that point put Lumentum’s market value near $83 billion against about $221 billion for Marvell, and Marvell’s cash at roughly $3.9 billion. Those numbers explain the structure. A cash purchase of this size was out of reach, so Lumentum holders take a third of the combined company instead. That is a heavy dilution for existing Marvell investors, and the shares’ reaction to the report suggests they noticed.

The rationale is competitive. Optical links are becoming a bottleneck inside AI clusters as electrical connections struggle to keep up with chip speeds, and Marvell, which already builds custom AI accelerators for large cloud customers, would own the laser supply behind its own optical products rather than buying it. The Marvell release does not name rivals, customers or the share of Lumentum’s sales tied to AI, and the combination’s claimed market size and synergies are the companies’ own estimates, not independently verified. Marvell also said its fiscal third-quarter 2027 revenue is consistent with prior guidance, and it narrowed the range around the midpoint to plus or minus 2% from plus or minus 5%.

What stays unsettled until 2028

Nothing changes for customers today: the companies remain separate until regulators and shareholders sign off, and closing is more than a year away. One report cited by the press suggests Chinese regulatory review could be lengthy, but neither company has said so, and the release lists only unspecified regulatory approvals. For a related look at how much capital is flowing into AI infrastructure, see our report on Amazon’s $77 billion quarter of AI spending.