Marvell Acquires Celestial AI for $3.25 Billion in Photonics Expansion
Marvell Technology has agreed to acquire Celestial AI in a deal valued at $3.25 billion upfront, marking a major push into optical interconnects for AI data centers. The transaction includes $1 billion in cash and 27.2 million shares of Marvell common stock, with potential earn-outs up to $2.25 billion based on revenue milestones through fiscal 2029. Celestial AI’s Photonic Fabric platform enables high-bandwidth, low-latency optical connections within AI clusters, addressing bottlenecks in scaling large processing units.
The acquisition targets the growing demand for efficient data center infrastructure, where copper interconnects limit bandwidth and increase power consumption. Photonic Fabric delivers over twice the power efficiency of traditional copper solutions, supporting connections across packages, systems, and racks. Marvell plans to integrate the technology into its custom AI chips and switches, starting with systems based on extreme processing units from clients like Amazon Web Services.
Celestial AI, founded in 2020, specializes in silicon photonics for disaggregated compute architectures. Its platform uses light-based signaling to achieve nanosecond latency and extended reach, critical for hyperscale AI training environments. The deal follows Marvell’s 2024 acquisition of Rockley Photonics’ patent portfolio, enhancing its electro-absorption modulators and optical switch capabilities.
Marvell CEO Matt Murphy described the move as a “transformative step” in AI connectivity leadership. The combined portfolio will offer comprehensive scale-up solutions, combining Celestial’s optical I/O with Marvell’s existing scale-out and scale-across technologies. Revenue from the integration is projected to contribute $500 million annually by the second half of fiscal 2028, scaling to $1 billion by fiscal 2029.
The agreement includes a warrant for Amazon to purchase up to $90 million in Marvell stock, tied to photonic fabric product adoption through 2030. This aligns with Amazon’s investments in custom AI infrastructure, where optical scale-up reduces energy costs in multi-rack deployments. Regulatory approvals are anticipated in mid-2026, with no major antitrust hurdles expected given the focus on complementary technologies.
Celestial AI’s technology supports up to 1.6 terabits per second per lane, far exceeding copper’s 100-400 gigabits limits. It eliminates the need for retimers and equalizers, cutting system complexity by 30%. Early pilots with Marvell customers demonstrate 50% reductions in latency for AI model inference tasks.
The acquisition bolsters Marvell’s position against competitors like Broadcom and Nvidia in the $50 billion AI networking market. Marvell’s custom chip revenue, serving Amazon and Microsoft, is forecast to grow 20% in fiscal 2026. Financing draws from Marvell’s $2.5 billion cash reserves, avoiding additional debt.
Integration plans involve joint R&D centers in Santa Clara, focusing on hybrid electro-optical engines. Celestial’s 150 engineers will join Marvell’s 7,000-person workforce, accelerating photonic co-packaged optics development. The deal underscores a shift toward optical fabrics in AI, where data volumes exceed 10 exabytes per cluster annually.
Industry analysts project photonics to capture 40% of data center interconnect spend by 2030. Marvell’s roadmap includes quantum-safe extensions for secure AI deployments. Customers report 25% improvements in training throughput using preliminary Photonic Fabric prototypes.
This merger expands Marvell’s addressable market to $20 billion in scale-up connectivity. It positions the company to deliver end-to-end optical solutions, from chip-to-chip to rack-to-rack. Early adopters include cloud providers handling 100-petaflop workloads.
Celestial’s platform maintains thermal stability across 0-70°C ranges, enabling dense AI server designs. Marvell commits to open standards compliance, ensuring interoperability with Ethernet and InfiniBand protocols. The transaction closes amid surging AI infrastructure investments, totaling $200 billion globally in 2025.
Post-acquisition, Marvell will prioritize production ramps for 800G optical transceivers. Revenue accretion begins in fiscal 2027, with gross margins above 60%. The deal reflects investor confidence, with Marvell shares rising 5% on announcement.
Celestial AI’s innovations stem from breakthroughs in electro-optic polymers, achieving 90% signal integrity over 10 meters. Marvell’s scale enables volume manufacturing at sub-$10 per port costs. This acquisition cements Marvell’s role in the optical AI era.
