Marvell to Acquire Lumentum in $115 Billion All-Stock Deal to Lead AI Connectivity

Marvell Technology agreed on November 2 to acquire optical-components maker Lumentum in an all-stock transaction carrying an implied enterprise value of $115 billion, the largest semiconductor acquisition ever announced and one of the biggest technology deals of 2026. Under the terms, Lumentum shareholders will receive a fixed exchange ratio of 4.5 Marvell shares for each share they hold, implying roughly $1,132 per share and a 23.9% premium to Lumentum's unaffected closing price on October 28. Upon closing, existing Marvell shareholders will own approximately 67% of the combined company, with Lumentum holders taking the remaining 33%.

The strategic logic centers on the accelerating shift from copper to optical connectivity inside AI data centers, where faster data transfer, greater bandwidth and improved power efficiency are creating surging demand for the lasers, transceivers and optical circuit-switching products that Lumentum makes. Marvell CEO Matt Murphy, who will lead the combined company, called it a "once-in-a-generation" opportunity, saying the deal expands the combined addressable market to $550 billion by layering Lumentum's photonics capabilities onto Marvell's custom AI chips, networking switches and interconnect silicon. The companies project more than $1 billion in annual run-rate cost synergies and expect the deal to be accretive to Marvell's adjusted earnings per share in the first year after closing.

The deal is expected to close in the first half of 2028, subject to shareholder and regulatory approvals, with a hard deadline of November 1, 2027 that can be extended to August 1, 2028 pending regulatory progress. Breakup fees are substantial: Marvell owes $3.2 billion if regulators block the deal or the deadline is missed, and $5.8 billion if its board walks away or pursues a rival offer, while Lumentum owes $2.9 billion if it backs out. Investor rights firm Halper Sadeh separately announced investigations into whether both sets of shareholders are receiving fair value.

Markets greeted the announcement with skepticism. Marvell shares fell roughly 3% and Lumentum dropped about 6% on the day, extending a slide that had already sent Marvell down approximately 13% when takeover rumors first circulated, putting the stock on pace for its worst three-day drop since September 2001. Because the deal is all-stock, the implied price paid for Lumentum moves directly with Marvell's share price, a structure that critics noted exposes Marvell shareholders to roughly 49% share-count dilution that must be offset by Lumentum's earnings contribution and the promised synergies. Rival optical supplier Coherent bucked the trend, rising about 2% as analysts highlighted the broader scarcity value of AI optics assets. Separately, Marvell reaffirmed the midpoint of its fiscal third-quarter revenue guidance while narrowing the expected range to plus or minus 2% from plus or minus 5%.