Lightmatter creates photonic chips and interconnect platforms that scale AI supercomputers, using photonics to overcome the bandwidth and reach limitations of electrical interconnects. The company develops a complete photonics interconnect platform including processors (Envise), interconnects (Passage), light engines (Guide), and software (Idiom) to enable clusters of over 100,000 GPUs in a single coherent fabric.
AI📍 Mountain View, CAFounded 2017
Current Valuation
$3.0B
as of 2024-Q4
UNICORN
QL Price
$3.2B
+4% vs last round
QuantLogix's current estimate for Lightmatter, published 2026-10-08 — in line with the last disclosed round of $3.0B (2024-Q4).
Confidence
medium
Basis
blended
What backs this price
Last disclosed round
$3.0B
2024-Q4
weight 0.29
Secondary market print
$3.3B
2026-06-27
weight 0.77
Public-company comparables
$1.7B
2024-Q4
weight 0.05
How this price has held up
No round has priced for Lightmatter since QuantLogix began publishing a price for it, so there is nothing to grade yet. The claim above is on the record from 2026-10-08 and will be graded against the next priced round. See the full accuracy record →
Which publicly-traded funds already hold it, what $10,000 buys, and whether any route is open to you.
Cite this price as QuantLogix QL Price, Lightmatter, 2026-10-08 (87f4366403c4dbd5).
The id pins this exact claim, so a citation stays checkable after the price moves.
Model estimate for research — not a quote, target price, or investment advice.
IPO Outlookprivate
Is Lightmatter going public?
No. Lightmatter is private and has not filed to go public. There is no S-1 on file.
What is Lightmatter's valuation in 2026?
Lightmatter is valued at $3.0B as of 2024-Q4, set by its Series C-3 ($13.48M, Oct 2024). That is the last confirmed mark, not a live price — private shares do not trade continuously.
Has Lightmatter filed an S-1?
No public S-1 is on file for Lightmatter.
Who are Lightmatter's investors?
Lightmatter's investors include T. Rowe Price, Fidelity Management & Research Company, GV (Google Ventures), Viking Global Investors, SIP Global Partners, Aliya Capital Partners and 9 more.
How much has Lightmatter raised?
Lightmatter has raised $850M in total, most recently a Series C-3 of $13.48M in Oct 2024.
Is Lightmatter publicly traded — can you buy Lightmatter stock?
No. Lightmatter is a private company — its shares are not listed on any exchange and there is no ticker. The routes to exposure are pre-IPO secondary marketplaces and funds (accredited investors), employee tender offers when the company runs one, and public companies with read-through exposure. QuantLogix maps every route it can verify for Lightmatter on its Pre-IPO Access Desk.
Answers are derived from the roster record shown on this page — filing status, last round and confirmed marks. Where the record is silent, the answer says so rather than guessing.
Company Profile
CEO
Nicholas Harris
Founded
2017
HQ
Mountain View, CA
Employees
251-500
Total Raised
$850M
Est. Revenue
$116M (2024-Q4)
Growth
Quadrupled valuation to $4.4B in October 2024 Series D
Last Round
Series C-3 — $13.48M (Oct 2024)
IPO Status
Private
Fundraising Status
Series C-3 · $13.48M · 2y ago
PrivateTotal raised $850M
Secondary Market
Implied price / share
$87.7
Last round price / share
$80.23
vs last round
+9.3%
Open interest
87
Last round price vs secondary price
Secondary price return by period
Implied per-share price from private secondary transactions, as of Jun 2026. This is a point estimate, not a quote — the feed carries no bid, ask or spread, and a secondary print is evidence of what someone paid on that date rather than a live market. Compare across every tracked name →
Latest Funding Round
Round
Amount
Date
Lead Investor
Post-Money
Series C-3
$13.48M
Oct 2024
—
—
Vertical Intelligence — AI / ML
Open models
0
Downloads (30d)
0
across all models
Followers
3
Attributed to Hugging Face organization "Lightmatter" as of 2026-10-04. Open-weights footprint only — closed-model usage is not publicly measurable. Verify on Hugging Face ↗
Talent Signal
Hiring trend
▶ Hiring steady
-3% vs 2026-08
Open roles
65
via greenhouse
Product-build share
94%
engineering, research, product, design
Trajectory
steady
heavy product build — 94% of open roles are product-building functions (engineering/research/product) — 29 of 65 open roles are engineering.
Actively hiring with no tracked executive churn.
Open roles by month
Open roles by function
■ product-building ■ go-to-market / G&A
Analog IC Design Engineer, High-SpeedAnalog IC Design Engineer, High-SpeedAnalog IC Design Engineer, Tech LeadAnalog/Mixed Signal ArchitectAnalog/Mixed Signal ArchitectChip Firmware Validation Engineer
Counted from Lightmatter's live job board as of 2026-09-15; role functions classified from posting titles. Open-role counts are an activity signal, not headcount. Refreshed monthly.
Founders & Key People
Nicholas HarrisDarius BunandarThomas Graham
Investors
T. Rowe Price · Fidelity Management & Research Company · GV (Google Ventures) · Viking Global Investors · SIP Global Partners · Aliya Capital Partners · Spark Capital · Matrix Partners · Hewlett Packard Enterprise · Hewlett Packard Pathfinder · Lockheed Martin Ventures · Harvard Innovation Labs · MIT $100K · E1 Ventures · Sahin Boydas
Photonic ComputingAI InfrastructureSilicon PhotonicsOptical InterconnectsAI ChipsData Center
Private-company numbers are not real-time. Reflects publicly disclosed valuations from press releases, news reports, and tender offers as of 2024-Q4. Refreshed quarterly.