Hydrostor Funding, Investors & Competitors

Hydrostor has raised $447M across 6 funding rounds, most recently a undisclosed-stage round in February 2026.

Last Hydrostor funding round

Undisclosed stage

Amount undisclosed · Feb 2026

Cumulative funding Hydrostor raised

$447M

across 6 funding rounds

Key investors in Hydrostor

  • Goldman Sachs Asset Management
  • BDC Capital
  • CPP Investments
  • Business Development Bank of Canada
  • ArcTern Ventures
  • Amplify Capital
  • Baker Hughes
  • Meridiam

Hydrostor Overview

About Hydrostor

Hydrostor is a Canada-headquartered developer of compressed air long-duration energy storage using water-augmented systems. Its technology stores hundreds of MW for 4-24 hours in underground formations, providing grid services like frequency regulation and renewable firming. Projects include a 5 MW pilot in Toronto and a 500 MW facility in Goderich, Ontario. Operating since 2012 from Mississauga, Hydrostor targets utilities in North America and Australia to defer transmission upgrades and replace peaker plants.


Founded

2010

HQ

CanadaToronto

Status

Privately held

Customer focus

B2B

Revenue model

Product sales

Hydrostor Funding History

Hydrostor has raised a total of $447M across 6 funding rounds.

Hydrostor's first fundraising round was a $37M undisclosed-stage round in September 2019. The most recent completed round was a undisclosed-stage round in February 2026.

Hydrostor funding rounds

Hydrostor funding rounds
DateStageInvestorsRaisedDeal Summary
Feb 2026Undisclosed stageHatch (lead)-Hydrostor is a leading global long-duration energy storage developer and operator specializing in advanced compressed air energy storage (A-CAES) technology. The company has a successful utility-scale facility in Goderich, Ontario, and is advancing projects including the Willow Rock Energy Storage Center in California and another in New South Wales, Australia, with a 7 GW project pipeline across the U.S., Australia, Canada, and the UK. On February 25, 2026, Hatch announced a strategic project execution partnership and equity investment in Hydrostor to deliver the Willow Rock Energy Storage Center, the largest A-CAES project worldwide at 500 MW / 4,000 MWh capacity for eight hours of continuous discharge. Hatch will lead design and execution, supporting Hydrostor's growth amid rising electricity demand. Hydrostor is backed by investors including Goldman Sachs Alternatives, CPP Investments, Canada Growth Fund, and Baker Hughes, which deepened collaboration with an equity investment and up to 1.4 GW equipment orders announced January 28, 2026. The Willow Rock project signed an offtake agreement with California Community Power, received final California Energy Commission permitting, and Kern County approvals, positioning it as shovel-ready in 2026 with online expected in 2030. Hydrostor ranks fifth globally among long-duration energy storage providers per Sightline Climate analysis for technologies with at least eight-hour discharge.
Jan 2026Strategic investmentBaker Hughes (lead)-Hydrostor is a developer and operator of long-duration energy storage solutions using advanced compressed air energy storage (A-CAES) technology. The company is advancing flagship projects including the 500MW Willow Rock Energy Storage Center in California, US, and the 200MW/1,600MWh Silver City Energy Storage Centre in Broken Hill, New South Wales, Australia. Willow Rock received its California Energy Commission permit in December 2025, while Silver City is set to begin construction later in 2026 and previously secured US$55 million from Export Development Canada in September 2025. On January 28, 2026, Hydrostor announced a strategic technology and equity agreement with Baker Hughes, a returning investor since 2019. Baker Hughes will integrate its compression, expander, motor, and generator technology into Hydrostor’s A-CAES design, with orders for up to 1.4 GW of equipment for the flagship projects. This collaboration expands a relationship that began in 2019 and supports Hydrostor as it nears construction on its US and Australian projects amid growing demand from AI data centers and grid stability needs. Hydrostor has raised a total of $353.15M over 9 prior rounds.
Feb 2025Undisclosed stageCanada Growth Fund Investment Management; CPP Investments; Goldman Sachs Asset Management$150MHydrostor is a Toronto-based long-duration energy storage (LDES) developer and operator founded in 2010. The company specializes in advanced compressed air energy storage (A-CAES) technology, which enables utilities to store renewable energy and replace fossil fuel generation with zero-emission alternatives. Hydrostor has offices in Toronto, Melbourne, and Denver, and is backed by major institutional investors including Goldman Sachs Alternatives, CPP Investments, and Canada Growth Fund. In February 2025, Hydrostor secured $200 million USD in funding from Canada Growth Fund Inc., Goldman Sachs Alternatives, and CPP Investments. The financing comprised a $150 million USD convertible note financing commitment and an additional $50 million USD convertible development expenditure loan facility dedicated to funding development costs for Hydrostor's Canadian projects, particularly the Quinte Energy Storage Centre project, a 500 MW/4,000 MWh A-CAES facility planned for Lennox and Addington County, Ontario. Hydrostor's project pipeline consists of over 11 projects totalling approximately 7 gigawatts of capacity, targeting deployment across Canada, Australia, the United States, and the United Kingdom. Late-stage projects in New South Wales, Australia, and California were targeted to begin construction in 2025. The company's existing commercial A-CAES plant in Goderich, Ontario, provides services to the Independent Electricity System Operator (IESO). Additionally, Hydrostor received a conditional commitment from the U.S. Department of Energy for a loan guarantee of up to $1.76 billion to develop the Willow Rock Energy Storage Center in southern California, which could deliver 500 MW/4,000 MWh of long-duration energy storage capacity. This investment marked the second time Goldman Sachs and CPP Investments had invested in Hydrostor, following a $250 million investment by Goldman Sachs Asset Management and CPP Investments in 2022. Hydrostor's CEO Curtis VanWalleghem expressed confidence in the company's ability to bring initial projects to market and continue building its robust project pipeline, with the company seeking markets with renewable energy penetration rates exceeding 30 percent and predictable cashflow pathways.
Jan 2022Undisclosed stageGoldman Sachs Asset Management (lead)$250MHydrostor is a Canadian long-duration energy storage developer specializing in Advanced Compressed Air Energy Storage (A-CAES) technology. The company has modified traditional compressed air storage to reduce wasted heat and work outside salt caverns, allowing deployment in any hard rock cavern formation, enabling more flexible site selection for utility-scale storage projects. In January 2022, Hydrostor announced a US$250 million preferred equity financing commitment from Goldman Sachs Asset Management's Private Equity and Sustainable Investing businesses. The investment was structured as tranched funding tied to project milestones to match capital needs throughout development, construction, and operations. Proceeds were designated to support development and construction of Hydrostor's 1.1 GW and 8.7 GWh of A-CAES projects in Australia and California, as well as global expansion of the project development pipeline. The financing also supported global development and marketing initiatives. At the time of the announcement, Hydrostor had two late-stage projects in California and a third in Australia totaling 1.1 GW/8.7 GWh capacity, with projects worldwide in various development stages providing over 200 MW capacity each. The investment came amid significant investor interest in long-duration energy storage, as competitors like Energy Vault, Form Energy, and FlexGen were also raising substantial capital during the same period.
Aug 2021Series ABusiness Development Bank of Canada (lead); BDC Capital$10MHydrostor, a Toronto-based advanced compressed air energy storage (A-CAES) developer, secured CA$10 million in growth capital from BDC Capital in August 2021. The investment was provided by BDC Capital's Cleantech Practice to advance Hydrostor's pipeline of long-duration energy storage projects. At the time, Hydrostor had a development pipeline exceeding 6 GW and 65 GWh of storage capacity across multiple countries, including projects in North America and Australia, with over 1,200 MWh in active development stages. The company's A-CAES technology enables utilities to integrate renewable energy by storing power for extended periods using proven components from mining and gas operations, positioning Hydrostor at the forefront of the energy transition as grid operators seek to scale renewable energy deployment and maintain grid reliability.
Sep 2019Undisclosed stageAmplify Capital; Elemental Energy; Lorem Partners; Canoe EIT Income Fd; ArcTern Ventures; Meridiam$37M-

Who has invested in Hydrostor?

13 investors have backed Hydrostor across its funding rounds, including Goldman Sachs Asset Management, BDC Capital, CPP Investments, Business Development Bank of Canada, ArcTern Ventures and Amplify Capital.

Lead investors include Hatch, Baker Hughes, Goldman Sachs Asset Management and Business Development Bank of Canada.


Hydrostor Investors

Investors in Hydrostor by funding rounds participated
InvestorHQRoundsRoleFirst check
Goldman Sachs Asset ManagementUnited StatesNew York City, NY2LeadJan 2022
Canada Growth Fund Investment ManagementCanadaMontreal1ParticipantFeb 2025
Amplify CapitalCanadaToronto1ParticipantSep 2019
CPP InvestmentsCanadaToronto1ParticipantFeb 2025
Elemental EnergyUnited StatesPortland, OR1ParticipantSep 2019
Lorem PartnersCanadaCalgary1ParticipantSep 2019
Canoe EIT Income FdCanadaCalgary1ParticipantSep 2019
HatchUnited StatesRichmond, VA1LeadFeb 2026
BDC CapitalCanadaMontreal1ParticipantAug 2021
Baker HughesUnited StatesHouston, TX1LeadJan 2026
Business Development Bank of CanadaCanadaMontreal1LeadAug 2021

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Hydrostor Competitors

Hydrostor competitors include listed companies like Vistra, Enlight Renewable Energy and Sunwoda Electronic Co, and private ones like Base Power, Northvolt and Farasis Energy.

Public and private companies comparable to Hydrostor
CompanyHQStatusRevenueEBITDAValuationRevenue Multiple
VistraUnited StatesUnited StatesPublicly listed$18B$5B$48B3.3x
Base PowerUnited StatesAustin, TXPrivate--$13B-
NorthvoltSwedenStockholmPrivate--$12B-
Enlight Renewable EnergyIsraelIsraelPublicly listed$582M$461M$11B-
Sunwoda Electronic CoChinaChinaPublicly listed$9.4B$388M$5.6B0.8x
Farasis EnergyChinaGanzhouPrivate--$4.2B-

Hydrostor Public Comps

Hydrostor is still privately-owned, but its public comps include Tesla, GE Vernova, CATL, Iberdrola, China Yangtze Power, Constellation Energy, LG Energy Solution, Vistra, ACWA Power and Vestas.

Last FYEV/RevenueEV/EBITDA
RevenueEBITDALast FYLTM2027ELast FYLTM2027E
Tesla$95B$10B15.0x13.8x140.8x97.4x
GE Vernova$38B$3.2B6.2x5.4x73.5x43.5x
CATL$63B$16B2.8x2.1x11.0x9.2x
Iberdrola$51B$17B4.4x4.3x13.2x11.8x
China Yangtze Power$13B$11B11.4x11.3x13.9x14.4x
Constellation Energy$26B$5B4.6x3.8x23.5x15.3x
LG Energy Solution$17B$3.4B4.8x3.9x24.1x22.2x
Vistra$18B$5B4.0x3.3x13.9x10.2x

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Common questions about Hydrostor

When was Hydrostor founded?Hydrostor was founded in 2010.
Where is Hydrostor headquartered?Hydrostor is headquartered in Toronto, Canada.
Is Hydrostor publicly listed?No, Hydrostor is a private, VC-backed company.
How much funding has Hydrostor raised?Hydrostor has raised $447M across 6 funding rounds.
What was Hydrostor's last funding round?Hydrostor's last funding round was a undisclosed-stage round in February 2026, led by Hatch.
Who are Hydrostor's investors?Hydrostor's investors include Goldman Sachs Asset Management, Canada Growth Fund Investment Management, Amplify Capital, CPP Investments, Elemental Energy, Lorem Partners, Canoe EIT Income Fd, Hatch, BDC Capital, Baker Hughes and 3 others.
Which companies are comparable to Hydrostor?Companies comparable to Hydrostor include Vistra, Base Power, Northvolt, Enlight Renewable Energy, Sunwoda Electronic Co and Farasis Energy.

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