Marvell agrees to buy Lumentum in $115 billion all-stock deal to build AI optical networking giant

Marvell Technology has agreed to acquire optical-components maker Lumentum Holdings in an all-stock transaction that values the combined business at roughly $115 billion, the two companies said in a joint announcement filed with securities regulators on November 2. The deal would merge Marvell's chips for moving data inside and between servers with Lumentum's lasers and optical transceivers, creating what the companies describe as a full-stack supplier for the optical networking that increasingly links banks of AI processors together.

Under the terms disclosed in the filing, each share of Lumentum stock will convert into 4.5 shares of Marvell stock, a fixed exchange ratio the companies say implies a price of about $1,132 per Lumentum share and a premium of roughly 23.9 percent over Lumentum's share price before word of the talks leaked out. Once the deal closes, current Marvell stockholders will own about two-thirds of the combined company and Lumentum stockholders about one-third, according to Marvell's own investor-relations release. Both companies' boards approved the agreement unanimously.

A deal years in the making, confirmed within days

The announcement followed a volatile week for both stocks. Marvell shares dropped about 13 percent in a single session on October 29 after Bloomberg reported the companies were in advanced talks, with investors weighing the dilution that would come from an all-stock purchase of a company worth roughly a third of Marvell's own market value, as contemporaneous market coverage noted at the time. Lumentum's stock moved in the opposite direction on the same reporting. Industry trade press had already flagged the prospective tie-up as potentially one of the ten largest technology and telecommunications mergers on record, underscoring how large a bet Marvell is making on optical connectivity as a growth category.

The regulatory filing covering the business combination confirms the deal is structured to require a joint proxy statement and prospectus before shareholder votes can be held, a process that typically takes several months once a Form S-4 registration is filed with the Securities and Exchange Commission.

Betting on optical links over copper

The companies frame the combination around a shift already under way inside AI data centers: as processors are packed more densely and clusters of chips are wired together at ever-higher bandwidth, copper wiring runs into physical limits on distance and signal loss that optical fiber does not share. Marvell's existing business supplies custom silicon, switches and electrical interconnect chips used inside and between servers; Lumentum makes the lasers, optical transceivers and optical circuit switches that move data over fiber, along with compound-semiconductor manufacturing capability built around indium phosphide.

Marvell's chairman and chief executive, Matt Murphy, who will continue leading the combined company, said in the companies' statement that AI infrastructure "is undergoing a fundamental architectural shift toward optical connectivity." Lumentum's chief executive, Michael Hurlston, who will join Marvell's board along with two other Lumentum directors, said joining Marvell creates a company "uniquely positioned to capitalize on a market opportunity of $550 billion" — the combined addressable market the companies are now targeting across data-center scale-up, scale-out and scale-across networking.

"AI infrastructure is undergoing a fundamental architectural shift toward optical connectivity," Marvell chairman and chief executive Matt Murphy said in the companies' joint statement announcing the deal.

Who is exposed to the outcome

Nvidia has a direct stake in how the deal plays out. Earlier in 2026 the chipmaker disclosed separate roughly $2 billion investments tied to partnerships with both Lumentum and Marvell, covering work on photonics and data-center networking technology, according to reporting on those earlier transactions. That makes Nvidia simultaneously an investor in and major customer of both companies now proposing to combine, a dynamic that could draw additional scrutiny from antitrust authorities assessing concentration in AI-networking supply chains.

Lumentum's roughly 10,000 employees, spread across research, manufacturing and sales sites including its San Jose headquarters, face the standard uncertainty of a large stock-for-stock merger: integration into Marvell's Santa Clara-based operations, potential site consolidation and the usual attrition risk during a lengthy regulatory review. Customers that rely on both companies for networking components — cloud providers and AI infrastructure builders among them — will be watching whether a combined Marvell-Lumentum can deliver the "pre-validated" optical designs the companies are promising, or whether the integration proves more disruptive than reassuring in the near term.

Financing concerns and the road to a 2028 close

Wall Street's immediate reaction to reports of the talks was skeptical, with analysts flagging Marvell's limited cash position — about $3.9 billion as of its latest quarterly report — relative to the scale of an all-stock deal of this size, and questioning whether such heavy reliance on newly issued shares would dilute existing Marvell holders' earnings per share. The companies' own materials project the opposite outcome over time: an accretive effect on non-GAAP earnings per share in the first year after closing, more than $1 billion in annual run-rate cost synergies, and improved long-term revenue growth and margins once integration is complete.

None of that materializes quickly. The merger requires approval from both companies' shareholders and from antitrust regulators, and the companies have set an expected closing window in the first half of calendar 2028 — more than a year away. Marvell separately disclosed preliminary fiscal third-quarter revenue in line with its prior guidance, narrowing its forecast range, while Lumentum reported its own fiscal first-quarter results the same day the merger was announced. Investors and regulators will spend the coming months parsing those separate businesses' performance even as the much larger question of whether the combination itself survives review plays out.