Marvell is buying optical communications maker Lumentum for about $115 billion, betting on a generational change in how connections work inside AI data centers. On November 2, 2026, the two companies announced a definitive agreement under which Marvell will acquire Lumentum in an all-stock transaction. The deal still needs approval from both companies' shareholders and regulators, and is expected to close in the first half of 2028. On the day of the announcement, Marvell's shares fell about 13%. The market did the dilution and integration math first, not the synergy math.
| Deal term | Announced terms |
|---|---|
| Structure | All-stock acquisition, enterprise value of about $115 billion including debt; equity value of about $102.5 billion |
| Exchange ratio | 4.5 Marvell shares for each Lumentum share, fixed ratio |
| Pro forma ownership | About 67% for existing Marvell holders, about 33% for Lumentum holders |
| Expected close | First half of 2028, subject to shareholder and regulatory approval |
| Synergy target | More than $1 billion in annual run-rate cost synergies, accretive to non-GAAP earnings per share in the first year |
The bet is not on chips, but on light
Marvell makes connectivity chips for data centers; Lumentum makes lasers, optical transceivers, and other optical components. The companies' logic is that links between accelerators, switches, and servers inside AI clusters are increasingly moving from copper cables to optical connections, because copper is struggling on bandwidth and power, while co-packaged optics, which places the optical engine right next to the switch chip, can shorten links further and cut power use. Lumentum said its optical components are sold out through early 2029, and that about 70% of demand for some products next year will go unmet. The two companies put the combined addressable market at $550 billion. That is the companies' estimate, not locked-in orders.
The shares fell first: what the market is worried about
Marvell's shares closed down 12.72% on November 2. Investors' worries are all visible in the deal structure: at the fixed exchange ratio, Lumentum holders will own about a third of the combined company, so dilution is unavoidable; both boards have approved the deal unanimously, but shareholder votes and regulatory reviews are still ahead, and the first-half-2028 close is only an expected date. On the other side, NVIDIA invested $2 billion in each company earlier this year, effectively backing the optical-connection route. Lumentum's fiscal first-quarter revenue, reported the same day, was $1.26 billion, up 136.5% year on year. Demand is not short of orders for now.
The agreement is signed, but the transaction is not done. Until the expected close in the first half of 2028, Marvell and Lumentum remain two separate companies. For data center buyers, little changes in the short term. What matters is whether the combined company can turn laser capacity and connectivity chips into a single working offering, rather than just assembling a bigger supplier list.
