Ayar Labs Adds $150M to Scale Optical I/O Production

Mark Wade is financing Ayar Labs against someone else's product calendar. AI systems expected to ramp in 2028 and 2029 need optical components qualified for volume production by the end of 2027, which means Ayar Labs cannot wait for customer demand to become obvious before building the engineering and manufacturing capacity to serve it.

Ayar Labs announced $150M in additional primary funding on September 10, 2026, taking its primary capital raised this year to $650M. Reuters identified the financing as an extension of the $500M Series E the company closed in March.

The new capital will support product development, validation, manufacturing ecosystem readiness, high-volume production, and a new Bengaluru Design Center. The financing matters because co-packaged optics is moving from a physics argument into a delivery schedule, where foundries, packaging, lasers, fibers, test operations, and rack builders all have to arrive at the same time.

What Ayar Labs Raised

The September financing adds $150M of primary capital to Ayar Labs' balance sheet. The company did not disclose the investors, security terms, or valuation for the new tranche, although it separately disclosed that Wiwynn made a strategic investment earlier in 2026.

The capital follows a $500M Series E led by Neuberger Berman in March, when Ayar Labs reported a $3.75B valuation and $870M in total funding. That round included ARK Invest, Insight Partners, Qatar Investment Authority, Sequoia Global Equities, 1789 Capital, AMD, Alchip, MediaTek, and NVIDIA. Earlier financings included a $155M Series D in December 2024 and a $130M Series C in April 2022.

A separate transaction needs its own ledger line. Reuters reported that Antero Peak Group at Artisan Partners led a $225M secondary purchase from early employees and investors, with Sequoia Global Equities, ARK Invest, and Greycroft participating. The secondary valued Ayar Labs above $5B, but those proceeds went to existing holders rather than funding company operations.

Why the Production Clock Matters

Ayar Labs develops co-packaged optics for AI scale-up. Its TeraPHY optical engine sits close to accelerators or switches inside the package, while the SuperNova external light source supplies the laser. The architecture replaces short-reach electrical links with optical connectivity intended to carry more data across greater distances with a lower power and thermal burden.

The hard part is turning that architecture into a product another company can design into a system years before deployment. Mark Wade told Reuters that Ayar Labs needs its components qualified for volume production by the end of 2027 so customers can ramp products in 2028 and 2029. Product development, reliability testing, packaging, supply-chain coordination, and manufacturing capacity therefore become one commercial problem.

That timetable explains the Bengaluru expansion. Sankara Venkateswaran, Ayar Labs' VP of Silicon Engineering, is overseeing the new center, with Senior Director of Engineering Arun Balachandar serving as site lead. The Bengaluru team will build end-to-end silicon product-development capability alongside Ayar Labs teams in the United States and Hsinchu, Taiwan.

From Photonics Research to Rack-Scale Systems

Ayar Labs was founded in 2015 around work developed across MIT, UC Berkeley, and the University of Colorado. MIT's account of the company traces the technical lineage to research on a microprocessor that communicated through photonic I/O, moving data with light while computing electronically.

The current leadership reflects that history. Mark Wade is CEO and co-founder, Vladimir Stojanovic is CTO and co-founder, and Chen Sun is Chief Scientist, VP and co-founder. Milos Popovic and Rajeev Ram remain technical principals and co-founders, while MIT also identifies Alexandra Wright-Gladstein as a historical co-founder and early CEO.

The commercial story now extends beyond the original chip. Wiwynn and Ayar Labs are developing an optically connected rack-scale architecture, and NVIDIA lists Ayar Labs among the optical interconnect partners in its NVLink Fusion ecosystem. Those relationships put Ayar Labs closer to the system builders and silicon platforms that determine whether co-packaged optics becomes a shipped architecture or an impressive component demonstration.

What the Funding Still Has to Turn Into

Ayar Labs has not disclosed revenue, current unit volumes, manufacturing yields, named hyperscale customers, or binding production commitments for the 2028-2029 cycle. Its ecosystem relationships establish technical and commercial relevance, while the evidence of volume adoption will come from qualification milestones, customer integrations, manufacturing consistency, and repeatable delivery.

That distinction makes the new capital useful to operators watching AI infrastructure. Compute roadmaps create demand years before a finished rack reaches a data center, and component suppliers have to spend into that gap. Ayar Labs is using $150M to close the distance between a production-ready design and a production system whose partners can trust the schedule.

By the end of 2027, the company's work will have moved through foundries, packages, external lasers, fiber connections, test equipment, and engineering teams across three countries. The 2028 and 2029 racks are still drawings and roadmaps today, but their deadlines are already hiring people, opening offices, and consuming capital inside Ayar Labs.