Marvell Technology is in advanced discussions to acquire Lumentum Holdings in a transaction that could value the optical-components maker at roughly $90 billion to $100 billion, according to people familiar with the matter. A deal could be announced as soon as early November if negotiations remain on track, though the talks are ongoing and terms could still change or fall apart.
The proposed acquisition would pair Marvell’s data-center connectivity chips with Lumentum’s laser manufacturing capacity, placing the combined company deeper inside the AI infrastructure supply chain. Demand for faster links between AI accelerators and network switches has turned optical hardware into a central constraint for large data-center operators, particularly as networks prepare for 1.6T and eventually 3.2T connections.
No offer price, financing plan, or cash-and-stock split has been disclosed. Lumentum’s scale means a substantial stock component would likely be required, raising the prospect of dilution for Marvell shareholders and helping explain the sharply different market reactions after the reports emerged.
Marvell shares fell more than 10% at one point in after-hours trading and were quoted near $230, down more than 8%. Lumentum rose more than 17% before trading around $993, representing an after-hours gain of 8.65%.
A potential $100 billion bet on optical capacity
Lumentum’s shares have climbed more than 360% during the past year, bringing its market capitalization to about $83 billion. Marvell’s market value is about $221 billion. Applying a customary takeover premium to Lumentum’s valuation produces the reported $90 billion to $100 billion range for a potential transaction.
That size would make the deal far larger than Marvell’s 2021 acquisition of Inphi, which Marvell valued at about $10 billion. Inphi gave Marvell a stronger position in PAM4 digital signal processors, chips that encode and decode data for high-speed optical modules used in cloud and data-center networks.
Buying Lumentum would add a different, more manufacturing-intensive layer of the optical supply chain. Lumentum produces electro-absorption modulated lasers, or EMLs, along with continuous-wave lasers and indium phosphide wafers. Those components generate and control the light signals that carry data through fiber-optic connections.
Marvell’s existing business is largely fabless, meaning it designs chips and relies on outside foundries, including TSMC, for wafer production. Lumentum operates more like an integrated device manufacturer, with in-house indium phosphide wafer fabrication as well as packaging and testing operations. Combining the two models could give Marvell more direct access to a component category where available capacity has become increasingly valuable.
AI clusters are stretching copper connections
The reported talks arrive as AI computing systems grow well beyond the scale of earlier data-center designs. Large clusters require huge numbers of links between accelerators, switches, storage systems, and other networking equipment. Copper remains useful over short distances, but signal loss, heat, power consumption, and limited reach become more difficult problems as bandwidth rises and systems become denser.
Optical interconnects use light rather than electrical signals to move data across longer distances with lower signal degradation. Their role expands as operators build larger clusters containing tens of thousands of accelerators and pursue designs with greater computing density.
Co-packaged optics, often shortened to CPO, has drawn particular attention because it places optical engines closer to switching silicon. That approach could reduce the electrical distance data must travel inside a network system, potentially easing power and signal-integrity pressures. It also increases dependence on specialized lasers, photonics packaging, and high-performance optical components.
The next generations of network equipment, including 1.6T and 3.2T systems, would require suppliers to deliver these components in far larger volumes than earlier optical upgrades. Lumentum’s manufacturing footprint could therefore be as strategically relevant to Marvell as its product catalog.
Indium phosphide shortages shape the deal logic
Indium phosphide, commonly called InP, is a semiconductor material suited to lasers and other high-speed optical devices. Building additional InP capacity is not a quick exercise. New wafer production lines are often estimated to require three to five years from construction through qualification and volume manufacturing.
Lumentum’s production has been described as sold out through early 2029, while demand forecasts for certain core products have exceeded planned supply. The reported gap is especially large for 2027, when roughly 70% of demand for some products was said to be unmet, followed by an estimated 30% shortfall in 2028.
Those figures show why access to existing capacity can carry more value than simply ordering more components. If Marvell acquired Lumentum, it could gain a measure of control over production lines that competitors and customers may otherwise need to secure through long-term supply agreements.
The transaction would also create questions for Lumentum’s current customer base. Lumentum sells across the optical ecosystem, and customers that compete with Marvell in certain networking segments could seek alternative laser suppliers to reduce reliance on a company owned by a rival chip designer.
Coherent shares rose above $250 in after-hours trading after the acquisition reports, reflecting market expectations that alternative optical suppliers could benefit if customers diversify purchasing. Coherent competes across several photonics and optical-component markets where supply relationships are becoming more strategically important.
Marvell faces cost and integration questions
The strongest immediate concern for Marvell is the price. Lumentum’s share rally has made any acquisition considerably more expensive, while a stock-heavy transaction could dilute existing Marvell shareholders. The after-hours decline in Marvell shares indicates that traders are weighing potential supply-chain benefits against the financial burden of a deal approaching $100 billion.
Margins could also become a point of scrutiny. Fabless chip businesses and integrated optical manufacturers have different capital needs, production cycles, and cost structures. Lumentum’s wafer fabrication and packaging operations would give Marvell physical manufacturing capability, but would also expose it more directly to factory utilization, equipment spending, yields, and production ramp risks.
A completed deal would extend Marvell’s AI-data-center strategy beyond the digital signal processors it gained through Inphi and into the laser and wafer layers that support optical networking. Whether that strategic expansion justifies the likely premium and dilution will depend on final terms that have yet to be disclosed.
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