Ciena to Acquire Nubis Communications for $270M
Telecommunications company Ciena has entered into a definitive agreement to acquire Nubis Communications, which specializes in high-performance, ultra-compact, low-power optical and electrical interconnects tailored to support AI workloads. The transaction serves to expand Ciena’s portfolio and add the capacity to address a wider range of opportunities inside the data center.
Nubis’ solutions complement Ciena’s existing high-speed interconnects portfolio and will enable new capabilities to support growing AI workloads by significantly increasing scale up and scale out capacity and density inside the data center. For Ciena, the Nubis portfolio includes two key technologies: electrical active copper cables, and co-packaged optics (CPO)/near-packaged optics.
Nubis’ compact, high-density optical modules support up to 6.4 Tbps full-duplex bandwidth, and are optimized for low-latency, low-power operations, making them ideal for scaling AI systems. Combined with Ciena’s high-speed SerDes, Nubis’ optical engines enable differentiated CPO solutions to address high-performance connectivity needs inside and between racks.
In addition, the acquisition will strengthen Ciena’s expertise inside the data center, with the addition of more than 50 engineers to Ciena’s R&D team.
Under the terms of the agreement, Ciena will acquire Nubis in an all-cash transaction for $270 million, subject to a customary purchase price adjustment mechanism for the amount of cash, debt, and net working capital of Nubis at closing, among other items. The transaction is expected to close during Ciena’s fiscal fourth quarter 2025 and is subject to customary closing conditions.
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Published: September 2025
Glossary
- optical communications
- Optical communications is a branch of photonics concerned with transmitting information using light as the carrier signal. In these systems, data is generated, modulated, transmitted, and detected through guided or unguided media such as optical fibers or free space. Light sources such as lasers or LEDs, along with optical amplifiers, modulators, and photodetectors, form the core components of these systems. Optical communication networks form the foundation of modern high-speed data...
- artificial intelligence
- The ability of a machine to perform certain complex functions normally associated with human intelligence, such as judgment, pattern recognition, understanding, learning, planning, and problem solving.
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