Optical networking startup Lumilens emerges from stealth with $900M raised at $5.5B valuation

Aug 6, 2026

Silicon photonics startup Lumilens has emerged from stealth with over $900 million in total funding, including a fresh $700 million Series C round valuing the company at $5.51 billion. Led by repeat founder Ankur Singla, the San Jose-based company aims to resolve AI's copper wiring bottleneck by replacing electrical connections with optical interconnects. Lumilens is already shipping products to an unnamed major hyperscaler under a multi-billion-dollar agreement, positioning itself as a key Western supplier as the FCC drafts a potential ban on Chinese optical transceivers.

Lumilens $5.5B valuation

▪Lumilens emerged from stealth on August 6, 2026, announcing more than $700 million in Series C funding that valued the startup at $5.51 billion.
▪Lumilens is led by co-founder and CEO Ankur Singla, who previously founded and sold networking startups Contrail Systems and Volterra.
▪The $700 million Series C funding round brought the total capital raised by Lumilens since its 2024 founding to over $900 million.
▪The Series C funding round for Lumilens was co-led by Atreides Management, Bain Capital Ventures, Meritech, Seligman Ventures, and Spark Capital.

Optical interconnect products

▪For scale-out networking, Lumilens is developing pluggable optical transceivers supporting 800G, 1.6T, and higher speeds to connect GPU racks.
▪For scale-up networking, Lumilens is developing near-package optics and co-packaged optics designed to replace short-reach copper interconnects inside server racks.
▪Lumilens designs optical interconnect products based on its LumiCore platform, which integrates silicon photonics, mixed-signal integrated circuits, electrical-optical interposers, and optical systems.

GPU connectivity constraints

▪A single 400,000-GPU data center site can require more than 2.4 million optical transceivers and over five million fiber strands.
▪At high data rates, electrical signals can travel only about 1.5 meters over copper wiring, limiting tightly coupled GPU clusters to a single rack.
▪Industry projections cited by Lumilens indicate significant shortages of 800-gigabit and 1.6-terabit transceivers through 2027 and 2029, respectively.

Manufacturing outside China

▪Chinese optical module vendors, including Zhongji Innolight and Eoptolink, currently hold a combined global market share of over 60 percent.
▪Lumilens CEO Ankur Singla stated that the company is committed to manufacturing its optical networking products outside of China.

Hyperscaler customer agreements

▪Lumilens announced it is shipping its first optical interconnect products into production data centers under a multi-billion-dollar customer agreement.
▪Lumilens declined to identify its marquee customer, but indicated the buyer is one of the four major hyperscalers: Amazon, Alphabet, Microsoft, or Meta.

FCC Chinese transceiver ban

▪Chinese optical suppliers Zhongji Innolight and Eoptolink have built production facilities in Thailand to serve North American demand outside of Chinese export exposure.
▪The Federal Communications Commission is reportedly drafting a measure to bar imports of new models of Chinese optical transceivers into the United States.