Startup profile · funding coverage
Ayar Labs funding, valuation and investors
AI interconnect company making co-packaged optical I/O; completed a $500M Series E at $3.75B in March 2026 and announced a further $150M expansion in September.
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Funding, valuation & investors
Answer-first snapshotLatest funding
2026 funding expansion
$150M incremental; combined 2026 total $650M · September 10, 2026
Latest known valuation
Not restated in announcement
2026 funding expansion · September 10, 2026
Total disclosed equity funding
$650M
Excludes debt, grants, acquisitions, secondaries, and IPO proceeds.
Current status
private
growth · San Jose, California, United States
Overview
Ayar Labs develops co-packaged optical interconnects for AI accelerators and data-center systems, including optical I/O chiplets and the associated laser/light infrastructure. On March 3, 2026 the company announced a closed $500M Series E led by Neuberger Berman at a $3.75B valuation, bringing disclosed cumulative funding at that time to approximately $870M.
On September 10 it announced an additional $150M, bringing total primary funding raised in 2026 to $650M, not $1.15B. Its investors include chip, networking, and institutional firms, but the September release does not restate a new valuation. Alumni Ventures' 2026 APEX portfolio list includes Ayar Labs, proving a historical portfolio relationship rather than investment in a specific Series E or extension.
Why Ayar Labs is interesting
The physical bottleneck in large GPU clusters is moving data at useful bandwidth and power. Ayar's optical interconnect technology aims to reduce energy and copper limitations. Crucially, the $650M figure in September is the combined 2026 capital raised, not an additional $650M round. AV lists Ayar in its portfolio but did not identify participation in either named 2026 financing.
Product & use cases
Ayar Labs designs optical I/O chiplets and supporting light sources for switching data among accelerators and other AI processors. Co-packaged optics replaces portions of electrical interconnect with photonic links to address bandwidth-density, distance and power bottlenecks.
- GPU and accelerator scale-up networking within large AI systems
- Higher-bandwidth optical links near computation dies
- Integration by chip and server manufacturers building optical scale-up platforms
Key facts
- March 3, 2026: $500M Series E led by Neuberger Berman at $3.75B valuation.
- September 10, 2026: $150M incremental financing; 2026 funding total $650M, not $500M+$650M.
- Company reported approximately $870M total funding in March, prior to September extension.
- Alumni Ventures lists Ayar Labs in APEX 100; no AV round amount or specific 2026 participation disclosed.
Funding history (newest first)
2026 funding expansion
2026-09-10 $150M incremental; combined 2026 total $650M Valuation: Not restated in announcementSource: Read source · ayarlabs.com
Series E
2026-03-03 $500M Valuation: $3.75B- Neuberger Berman (lead)
- ARK Invest (participant)
- Insight Partners (participant)
- Qatar Investment Authority (participant)
- 1789 Capital (participant)
- NVIDIA (participant)
- AMD Ventures (participant)
Source: Read source · ayarlabs.com
Investors in our directory
Funds linked from Ayar Labs's profile — open a fund page for stage focus and related deal articles.
Competitive landscape
Edge: Potential power-per-bit and reach improvements from optical interconnect close to compute. Production yields, packaging integration, systems qualification and volume economics remain critical uncertainties.
The key question is deployment at high production volume, including optical yields, lasers, packaging thermals, interoperability and total AI cluster throughput per watt. Valuation is a financing event, not proof of mass shipments or profitability.
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Lightmatter direct
Photonic connectivity and co-packaged optical interconnect systems.
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Celestial AI direct
Optical fabric approach for memory and AI compute connectivity; ownership and products differ.
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Broadcom incumbent
Large semiconductor supplier developing optical networking technologies and system components.
Industries
Market / IPO context
Editorial / static context — not a live quote.
FAQs about Ayar Labs
Practical answers founders, operators, and investors typically search for.
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Editorial note: AI tools assisted with research, structure, or drafting. Venture Capital Tracker retains human editorial responsibility for factual accuracy, relevance, and source quality before publication.