Optical Interconnect: Marvell's $115 Billion Acquisition of Lumentum
2026-11-03
On November 2, Marvell and Lumentum announced a definitive agreement under which Marvell will acquire Lumentum in an all-stock transaction valued at approximately $115 billion. Upon completion, existing Marvell shareholders will hold about 67% of the combined company and Lumentum shareholders about 33%, with Lumentum CEO Michael Hurlston and two other directors joining Marvell's board. The transaction is expected to close in the first half of 2028, subject to shareholder and regulatory approvals.
Why Optical Interconnect
As per-rack power and cluster scale continue to rise, copper's constraints in bandwidth density and power consumption become concrete: the higher the speed, the more power and heat the copper path consumes, and the more limited the transmission distance. In their announcement, Marvell and Lumentum stated that AI infrastructure is shifting from discrete modular components to highly integrated optical solutions, requiring closer co-design of electrical and optical technologies.
In terms of product portfolio, Marvell has built strength in electrical interconnect, network switching, and custom XPUs, but is incomplete in lasers, optical transceivers, and optical circuit switching. After the merger, Marvell expects its addressable market to expand to $550 billion, with annual cost synergies exceeding $1 billion.
Lumentum's Strengths
For its fiscal 2027 first quarter ended September 26, 2026, Lumentum reported revenue of $1.26 billion, up 136.5% year on year. Pump lasers and optical circuit switching were the main growth drivers; the company secured its second major NPO/CPO order in the quarter, with purchase commitments exceeding $5 billion. Visibility for OCS demand has expanded significantly in recent months, and it is expected to become a multi-billion-dollar annual revenue source.On the supply side, the supply-demand gap for EML lasers exceeds 30%, and pump lasers are even tighter. Lumentum has had to allocate capacity to large customers, with some products sold out for the foreseeable future.
Approval Timeline
After the deal was announced, Lumentum shares fell about 11% and Marvell about 6%. The reason centers on approvals. Both companies have significant China exposure: about 36% of Marvell's revenue in its last fiscal year came from China, and Lumentum plus the Hong Kong market accounted for about 26.6%. Both have reached the threshold for China's merger control filing and must obtain approval from the State Administration for Market Regulation.
Notably, Lumentum currently supplies both Marvell and its competitors, and tight laser supply itself could become an entry point for antitrust review. Antitrust review could last 12 to 18 months.
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