Lightmatter Stock Price, Valuation & IPO
Private company — Lightmatter is privately held. Its shares are not listed on any public exchange and can only be accessed through private secondary transactions.
Status source: AXEVIL investment team
$88.07 per share (AXEVIL consensus estimate)
Source: AXEVIL consensus of recent secondary transactions · as of 27 October 2026
Last round valuation: $4.4B
Source: D, October 2024, post-money
Total raised: $400M (Series D)
Data last updated: 27 October 2026
About Lightmatter
Designs photonic chips and interconnects — the Passage line and the Guide light engine — replacing electrical signal transmission in AI data centers to improve bandwidth and power efficiency in large GPU clusters.
Lightmatter is a leading developer of photonic interconnects for AI data centers. The bottleneck in AI infrastructure has shifted from compute to moving data between compute nodes: clusters have grown to hundreds of thousands of accelerators, networking is moving from 400G to 1.6T, and at these speeds copper runs into physics — the signal holds for only about a meter, and every bit costs energy. The company embeds optics directly under the processor package: the Passage L200 runs at 3 pJ/bit versus 5-8 for copper NVLink and 10-20 for pluggable optics, and a single chip replaces roughly 40 pluggable optical modules. Management estimates the platform cuts total AI infrastructure cost by about 25%. Industry records include 114 Tbit/s of optical bandwidth on the Passage M1000 chip and 1.6 Tbit/s per fiber. In June 2026 the company joined the NVIDIA NVLink Fusion ecosystem, and on August 13 it led a coalition of 19 companies (Dell, Qualcomm, Foxconn, Celestica, Flex, Keysight) within the Open Compute Project writing the industry standard for co-packaged optics; manufacturing is backed by partnerships with GlobalFoundries, ASE, Amkor, and GUC. The latest round was a $400M Series D at a $4.4B valuation, led by T. Rowe Price; the valuation hasn't been revised since October 2024. Against a planned $372M in 2026 revenue, that's 11.8x revenue — cheaper than every private peer in the sector (Ayar Labs trades at 38-75x). The expected exit is $25B on a 2029-2030 horizon, 5.7x the latest round.
- Sector: Semiconductors
- Headquarters: Mountain View, California, USA
- Founded: 2017
Key highlights
- Products reach the market in 2026. For three years the company lived on engineering kits and customer qualifications. In 2026, L200 and L200X become commercially available, Guide DR samples ship in Q4, and M1000 is already shipping: revenue up 6.7x year over year, gross margin from 4% to 40%.
- NVLink Fusion opens the door to hyperscalers. Hyperscalers are designing their own accelerators, and connecting them to NVIDIA's infrastructure requires optics — which NVIDIA doesn't manufacture for third parties. A ready-made sales channel that doesn't have to compete with compute for budget.
- The company is writing the standard the industry will live by. A 19-company coalition within the Open Compute Project, led by Lightmatter, scaling from 72 to 1,024+ nodes, with first specifications due in Q4 2026. When an industry standardizes around your architecture, you get the default position, not just a market share.
- Every qualification locks in the customer for the long haul. The 3D interposer sits under the processor package: the customer redesigns the package around it, so switching suppliers means a whole new chip development cycle. Meanwhile the product line keeps expanding — L20, L200, M1000, Guide, vClick — and average revenue per customer keeps growing.
Funding rounds
| Date | Round | Price / share | Post-money valuation |
|---|---|---|---|
| 16 October 2024 | D | $80.23 | $4.4B |
| 19 December 2023 | C-2 | $26.00 | $1.2B |
| 31 May 2023 | C-1 | $16.46 | $638M |
| 6 May 2021 | B-2 | $8.77 | $251M |
| 25 February 2019 | A-1 | $5.90 | $92M |
| 5 February 2018 | A | $2.75 | $32M |
Frequently asked questions
How can I buy Lightmatter stock before the IPO?
Not on a public exchange — Lightmatter is privately held. Shares change hands only in private secondary transactions. AXEVIL structures those as dedicated US special purpose vehicles for accredited investors, subject to availability and to the rules of your jurisdiction.
What is the Lightmatter stock price?
A private company has no single official share price. AXEVIL's consensus estimate is $88.07 per share as of 27 October 2026. Its most recent round implied a post-money valuation of $4.4B (October 2024).
What is Lightmatter's valuation (net worth)?
Lightmatter's most recent funding round valued the company at $4.4B post-money (October 2024) — the latest primary-market measure of what the company is worth. Secondary trades can price its shares above or below that round.
When will Lightmatter IPO?
No listing has been announced. AXEVIL does not forecast IPO dates — this page states what has actually been filed or reported, with the date it was last checked.
Is Lightmatter publicly traded?
No. Lightmatter is a private company and its shares are not listed on any public exchange.
Does Lightmatter have a stock symbol?
No. Lightmatter has no ticker symbol because its shares are not listed on any exchange; a symbol is assigned only at an IPO or direct listing.
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Risk disclosure
Nothing on this page is an offer to sell or a solicitation to buy any security, and it is not investment advice. Valuations and share prices shown here are AXEVIL estimates built from primary sources — filings, announced rounds and completed secondary transactions — not quoted market prices, and they can be revised. Private-company shares are illiquid, may be impossible to sell, and the entire amount invested can be lost. Availability depends on your jurisdiction and on accredited-investor status.