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LIGHTMATTER
Lightmatter
Quantum Computing / Photonics · Mountain View, California · United States · Founded · 2017 · ≈ · 100 · employees

Lightmatter Funding — Last Valued at $12.5B

IPO filed

Lightmatter has raised $823M across 7 funding rounds. The latest round valued Lightmatter at $12.5B post-money, with T. Rowe Price Associates, Fidelity Management & Research Company, Google Ventures on the lead line.

ProfileValuationFundingCompetitorsStock & IPOHow to invest
Lightmatter funding · at a glance
Total raised, all rounds
$823M
some round sizes not disclosed
Funding rounds
7
priced rounds
Latest round
$12.5B
post-money · Apr 2026
Lead on that event
T. Rowe Price Associates
lead investor
2026
About Lightmatter

Lightmatter raised just over $300 million in 2023 at a $1.2 billion valuation, and by October 2024 its total funding had grown to $850 million at a $4.4 billion valuation.

Funding timeline

The Lightmatter funding timeline

7 funding rounds, the latest highlighted.

2017
Lightmatter founded

Lightmatter was founded in 2017, United States.

FEB 2018
Series A

A primary round — the company sells new shares to investors it selects. $11M raised, led by Matrix.

Valuation basisAmount$11MPrice / shareLeadMatrix
FEB 2019
Series A

1435 Capital Management, Aglae Ventures, Somesh Surapureddi, Breakthrough Energy Ventures, Craig Shapiro, Comcast Ventures, DFJ, E1 Ventures, Family Office, Future Ventures, Gigafund, GoAhead Ventures, Lakeside Capital, Litquidity Ventures, Long Journey Ventures, Malex Enterprises, Andrew Schoen, Partners Resolute, Prelude Ventures, Sequoia Capital, Social Capital, Space Capital, Starbridge Venture Capital, UpHonest Capital, Adeel Hussain, Fanny Surjana, Ishani Patel, Louis Beryl, Mattia Astori, Priyank Chandra, Rashaun Williams, Richard Cooperstein, Scott Banister, Shane Neman, Siddharth Singhal, TIM Ringel, Vikas Sabnani. $22M raised, led by GV.

Valuation basisAmount$22MPrice / shareLeadGV
APR 2021
Series B

Breakthrough Energy Ventures, Cedar Fund, Craig Shapiro, Comcast Ventures, FAST — BY GETTYLAB, GV, Andrew Schoen, Prelude Ventures, Sequoia Capital, Spark Capital, Strange Brew Ventures, LLC. $80M raised.

Valuation basisAmount$80MPrice / shareLead
MAY 2023
Series C

Breakthrough Energy Ventures, C2 Investment, Craig Shapiro, Comcast Ventures, GV, Andrew Schoen, Prelude Ventures, Sequoia Capital, Starbridge Venture Capital, Trajectory Ventures, Virginia Venture Partners, John Collison, Trevor Wright. $150M raised.

Valuation basisAmount$150MPrice / shareLead
DEC 2023
Series C

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

Valuation basisAmount$160MPrice / shareLead
OCT 2024
Series D at $4.4B post-money

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

Valuation basispost-moneyAmount$400MPrice / shareLeadT. Rowe Price Associates
APR 2026LATEST
S-1 Filing at $12.5B post-money

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

Valuation basispost-moneyAmountPrice / shareLeadT. Rowe Price Associates, Fidelity Management & Research Company, Google Ventures
IPO: FILING MADE

A filing has been made.

Funding rounds

Lightmatter funding rounds in full

7 dated rounds, newest first.

Round
Date
Amount
Valuation
Price / share
Lead investors
Participation
S-1 Filing LATEST
Apr 2026
—
$12.5Bpost-money
—
T. Rowe Price Associates, Fidelity Management & Research Company, Google Ventures
—
Series D
Oct 2024
$400M
$4.4Bpost-money
—
T. Rowe Price Associates
Breakthrough Energy Ventures, Craig Shapiro, Comcast Ventures, GV, Andrew Schoen, Prelude Ventures, Sequoia Capital
Series C
Dec 2023
$160M
—
—
—
Breakthrough Energy Ventures, Craig Shapiro, Comcast Ventures, GV, Andrew Schoen, Prelude Ventures, Sequoia Capital
Series C
May 2023
$150M
—
—
—
Breakthrough Energy Ventures, C2 Investment, Craig Shapiro, Comcast Ventures, GV, Andrew Schoen, Prelude Ventures, Sequoia Capital, Starbridge Venture Capital, Trajectory Ventures, Virginia Venture Partners, John Collison, Trevor Wright
Series B
Apr 2021
$80M
—
—
—
Breakthrough Energy Ventures, Cedar Fund, Craig Shapiro, Comcast Ventures, FAST — BY GETTYLAB, GV, Andrew Schoen, Prelude Ventures, Sequoia Capital, Spark Capital, Strange Brew Ventures, LLC
Series A
Feb 2019
$22M
—
—
GV
1435 Capital Management, Aglae Ventures, Somesh Surapureddi, Breakthrough Energy Ventures, Craig Shapiro, Comcast Ventures, DFJ, E1 Ventures, Family Office, Future Ventures, Gigafund, GoAhead Ventures, Lakeside Capital, Litquidity Ventures, Long Journey Ventures, Malex Enterprises, Andrew Schoen, Partners Resolute, Prelude Ventures, Sequoia Capital, Social Capital, Space Capital, Starbridge Venture Capital, UpHonest Capital, Adeel Hussain, Fanny Surjana, Ishani Patel, Louis Beryl, Mattia Astori, Priyank Chandra, Rashaun Williams, Richard Cooperstein, Scott Banister, Shane Neman, Siddharth Singhal, TIM Ringel, Vikas Sabnani
Series A
Feb 2018
$11M
—
—
Matrix
—
Lightmatter · investors

Investors

T. Rowe Price AssociatesLEADFFidelity Management & Research CompanyLEADGoogle VenturesLEADGVLEADMMatrixLEADLowercarbon CapitalFFoundry GroupKhosla Ventures

Frequently asked questions

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.

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