Who has invested in Lightmatter?

Lead investors for each round are in the funding timeline.

Who are Lightmatter's competitors?

The closest quantum computing / photonics peers are on the competitors page.

How can I get exposure to Lightmatter?

The routes section explains what is realistically available for a company at this stage.

Is Lightmatter publicly traded?

Not yet. Lightmatter has filed for an IPO; until it prices, the shares do not trade publicly.

How to Invest in Lightmatter: 3 Routes

Three routes · ranked by accessibility

The routes that exist, and what each one really gives you

If you came here to buy Lightmatter stock, there is nothing to buy on an exchange: no public ticker exists. What follows is ranked by how easily an ordinary investor can start. Whether Lightmatter shares are on offer through a private route at a given moment is up to the holders.

ROUTE Aany investor

Listed funds that hold private companies

A handful of listed closed-end and venture funds carry late-stage private names in their portfolios. You buy the fund in any brokerage account; the private company is one position inside it. A fund's latest schedule of investments shows whether it holds Lightmatter.

Lightmatter holding · fund-specific

Pros

✓Works in an ordinary brokerage account

✓No accreditation, no company approval

✓Sellable on any trading day

Cons

—You own fund shares, and Lightmatter may not be in the portfolio at all

—Closed-end funds have traded at large premiums to NAV

—Any single position is a slice — the rest of the book moves your return too

ACCESSAny brokerage that lists the fund · no minimum beyond one share · read the latest holdings report and the premium to NAV before you assume Lightmatter is in there

ROUTE Baccredited only

Secondary marketplaces

Platforms that match existing shareholders with buyers. This is the route that can end with private shares, or an interest in a vehicle holding them, in your account. Supply comes from employees and early investors choosing to sell, so a name can be quoted one month and absent the next.

Lightmatter availability · set by holders

Pros

✓Direct exposure to the equity itself

✓Pricing follows recent private-market sales

✓A position taken now survives into an eventual listing

Cons

—Accredited-investor status is verified before you can bid

—The company must approve the transfer and usually holds a right of first refusal

—Five-figure minimums and weeks of settlement; no exit until a liquidity event

ACCESSAccredited investor · platform onboarding and KYC · company transfer approval plus the refusal window before settlement

ROUTE Cinvitation only

Employee-share vehicles

Single-purpose vehicles and forward contracts written against shares held by employees and early investors. The sponsor holds the position; you hold an interest in the sponsor's vehicle. Deals circulate through fund networks; there is no public order book for them.

Lightmatter vehicles · by invitation

Pros

✓Reaches allocations that never appear on a marketplace

✓The vehicle can participate in a future tender

✓Sponsors handle the paperwork and the cap-table mechanics

Cons

—You are one layer removed from the cap table

—Management and carry fees stack on top of the share price

—Transfer restrictions can invalidate a structure the company never approved

ACCESSInvitation or qualified-purchaser status · counsel should read the vehicle documents before you subscribe · minimums are set by the sponsor

FINAL STEPnot a route today

Track the IPO

Lightmatter has filed for an IPO. Where a submission is confidential, no terms are published with it: nothing to allocate, nothing to price and nothing to trade until a public filing lands.

WATCHA public IPO filing opens the listed route

A filing is not a commitment to list. Companies withdraw drafts, and no date exists until the company sets one.

Comparison · every route in one table

The routes side by side

The first row is the Canborsa market closest to Lightmatter: a perpetual on NVDA, open in minutes with an email and USDC. The three routes below it are the ways to hold Lightmatter shares, ranked by how easily an ordinary investor can start.

Route

Access requirement

Typical minimum

Liquidity

Ends with shares?

Canborsa· NVDA-PERP—Sign upnearest market to Lightmatter · live

Email, X or a wallet + USDC

from $1

24/7 · perpetual market

No — perp exposure on NVDA

A · Listed fundsindirect · via a fund

A brokerage account that lists the fund — no accreditation

one fund share

Daily, on-exchange

No — fund shares

B · Secondary marketplacesshare ownership

Accredited investor, company transfer approval, refusal window

five figures, platform-set

Weeks — approval-gated

Yes — with restrictions

C · Employee-share vehiclesshare ownership · indirect

An invitation from the sponsor, plus qualified-purchaser status in most structures

set by the sponsor

At a future tender or exit

Indirect — via the vehicle

Canborsa — a perpetual on NVDA, price exposure without sharesshare ownership — you sit on or behind the cap tablefund exposure

Liquidity events · read as an access question

Who could actually buy in, and when

Every disclosed round, read as an access question.

No Lightmatter liquidity event has been open to retail buyers on the primary side — the routes above exist precisely because of that.

Liquidity event

Date

Valuation

Who could participate

S-1 Filing LATEST

1 Apr 2026

$12.5B

A primary round — the company sells new shares to investors it selects. Led by T. Rowe Price Associates, Fidelity Management & Research Company, Google Ventures.

Series D

16 Oct 2024

$4.4B

Breakthrough Energy Ventures, Craig Shapiro, Comcast Ventures, GV, Andrew Schoen, Prelude Ventures, Sequoia Capital. $400M raised, led by T. Rowe Price Associates.

Series C

1 Dec 2023

Breakthrough Energy Ventures, Craig Shapiro, Comcast Ventures, GV, Andrew Schoen, Prelude Ventures, Sequoia Capital. $160M raised.