Marvell to Buy Lumentum in All-Stock Deal Valuing It at $115bn

Marvell Technology has agreed to buy Lumentum, a maker of lasers and optical parts for AI data centres, in an all-stock deal that gives Lumentum an implied enterprise value of $115 billion. The two companies announced the Lumentum acquisition on 2 November 2026 in a joint release filed with the US Securities and Exchange Commission and posted on Marvell’s investor relations site.

The deal is a wager that the wiring inside AI systems is moving from copper to light, and that one company should design both the electronics and the optics. Marvell sells the chips that drive and switch data signals; Lumentum makes the lasers and optical transceivers that turn those signals into light. Neither side expects the Lumentum acquisition to be complete for well over a year: the companies say closing is expected in the first half of calendar 2028, subject to shareholder votes and regulatory approval.

How the Lumentum acquisition is priced

Lumentum stockholders will receive a fixed 4.500 Marvell shares for every Lumentum share they own. The companies say that works out at about $1,132 a share, a premium of about 23.9% on both companies’ closing prices on 28 October 2026, which the release calls “the last trading day before market speculation regarding a potential transaction began”. Because the ratio is fixed, the value Lumentum holders finally receive will rise and fall with Marvell’s share price until closing.

After the deal, existing Marvell stockholders would own about 67% of the combined company and Lumentum stockholders about 33%, on a fully diluted basis. Both boards approved the deal unanimously. Matt Murphy stays as Marvell’s chairman and chief executive, and three Lumentum directors, including chief executive Michael Hurlston, will join Marvell’s board, which the release says currently has seven members.

Marvell’s 8-K filing adds the terms of the Lumentum acquisition behind the headline numbers. The merger agreement was signed on 1 November. If the deal is not done by 1 November 2027, either side can walk away, though that date can be pushed to 1 February, 1 May and finally 1 August 2028 in some circumstances while regulatory approvals are outstanding. Marvell would pay Lumentum a $3.2 billion regulatory termination fee if the deal fails in certain circumstances on antitrust or foreign-investment grounds. Separate break fees of $5.8 billion (payable by Marvell) and $2.9 billion (payable by Lumentum) apply mainly if either board changes its recommendation or takes a better offer.

Both companies frame it as a shift from copper to optics

“AI infrastructure is undergoing a fundamental architectural shift toward optical connectivity, creating an opportunity that comes along once in a generation,” Murphy said in the release. The companies argue that bandwidth demand and “the physical limitations of copper-based connectivity” are pushing AI systems towards optical links, and that those links increasingly need electrical and optical parts designed together.

Marvell has been working both sides of that divide. In October it launched new chips for carrying AI traffic over copper inside racks, alongside memory-expansion chips for AI servers. Lumentum, for its part, joined Astera Labs and Corning that month to show PCIe running over light inside an AI rack. The release says Lumentum brings compound semiconductor manufacturing, including indium phosphide, plus high-speed and high-power laser capability.

The business case for the Lumentum acquisition is the companies’ own forecast, not a result. They say the combination is expected to expand their total addressable market to $550 billion, to give “line of sight to more than $1 billion in annual run-rate cost synergies”, and to add to Marvell’s non-GAAP earnings per share in the first year after closing. They also expect it to improve long-term revenue growth and non-GAAP margins.

Lumentum arrives with momentum. In its own results release on the same day, it reported revenue of $1.26 billion for the quarter to 26 September, up 136.5% on a year earlier, and forecast $1.575 billion to $1.625 billion for the current quarter. Hurlston said Lumentum had secured “our second major NPO/CPO win, backed by purchase commitments exceeding $5 billion”, which is the company’s own account. Marvell, meanwhile, said its preliminary third-quarter revenue was in line with earlier guidance.

The long road to 2028 is the deal’s real test

The terms of the Lumentum acquisition say more about risk than the slogans do. A closing target in the first half of 2028, an outside date that can stretch to August that year and a $3.2 billion fee that Marvell pays if regulators block the deal all point to a review the two companies expect to be long. The 8-K names the US Hart-Scott-Rodino waiting period and “certain other required regulatory approvals” without listing them, so readers cannot yet tell which jurisdictions will have the final say.

The fixed exchange ratio also matters. Lumentum’s owners are being paid in Marvell paper, so the $115 billion figure is a snapshot of prices before speculation began, not a sum of cash. If Marvell’s shares move sharply before closing, the value of the deal moves with them.

The industrial logic is easier to follow. TSN has reported on a severalfold jump in optical fibre prices as AI demand outruns supply, and the release talks of using Lumentum’s laser plants to “strengthen strategic supply”. Owning the laser fabs as well as the signal chips gives Marvell more control over a scarce input, but it also turns an independent optical supplier into part of a chip company. How Lumentum’s existing customers react, and whether regulators see that as a concern, will shape whether the $550 billion market and $1 billion savings ever move from forecast to fact.

Next come the S-4 registration statement and joint proxy, which the companies say Marvell intends to file with the SEC, and then the votes by both sets of stockholders.

Sources

• Marvell Technology and Lumentum: joint press release, Exhibit 99.1 to Marvell Form 8-K, 2 November 2026 (SEC EDGAR)
• Marvell investor relations: “Marvell and Lumentum to Combine, Creating a Category Leader in AI Connectivity”, 2 November 2026
• Marvell Technology: Form 8-K, Item 1.01 Entry into a Material Definitive Agreement, filed 2 November 2026 (SEC EDGAR)
• Lumentum: first quarter of fiscal 2027 results, Exhibit 99.1 to Form 8-K, 2 November 2026 (SEC EDGAR)

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