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Cleantech Open — Portfolio, Page 3

Investor actively backing innovative startups and growth-stage companies across various industries and funding rounds.

227
Companies
$599.0M
Total invested
$3.3M
Avg. check
60
Industries
Energy 8Renewable Energy 6Agriculture 4Electronics 3Energy Storage 3Solar 3+54 more
Founder contacts

Verified emails & LinkedIn for founders across this portfolio.

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Portfolio companies

Showing 49–72 of 227
RePurpose Energy
March 2026

RePurpose Energy reuses electric vehicle batteries to create lower-cost, more sustainable "second life" solar energy storage systems.

Battery · Fairfield$268K Equity Crowdfunding
Elateq
March 2024

Elateq delivers an all-in-one water treatment system that simultaneously removes a wide range of water contaminants.

Environmental Consulting · Amherst$200K Grant
Clean Valley Bio-filtration Technologies
March 2026

Clean Valley CIC is a group of entrepreneurs, engineers and environmental scientists with a nature-inspired ideas for Canadian Innovation.

AgTech · Dartmouth$4.0M Debt Financing
Scalvy
March 2026

Scalvy is a modular power electronics company delivering ultra-high, grid-interactive power for data centers, energy storage, and EVs.

Data Center · Austin$13.9M Series A
MicroEra Power
March 2026

Resilient, efficient Thermal Energy Storage for C&I buildings

CleanTech · Rochester$25K Non-equity Assistance
Aker Technologies
March 2022

Aker is an agriculture data company providing crop intelligence and in-season analytics.

Agriculture · Creve Coeur$2.4M Venture - Series Unknown
Capro-X
March 2025

Capro-X is an ag-tech company that improves the sustainability in the dairy industry.

Agriculture · IthacaSeed
OxEon Energy
March 2024

OxEon Energy is a cleantech start-up that works on alternative energy storage, synthetic fuels, and high purity gas production.

Clean Energy · North Salt Lake$36.3M Grant
Big Blue Technologies
March 2024

Big Blue Technologies is developing a thermal magnesium metal production process.

Mineral · Denver$400K Grant
Allumia
February 2023

Allumia funds, designs, install and maintain a lighting upgrade for commercial and industrial customers.

Energy · SeattleConvertible Note
Ecotone Renewables
February 2025

Ecotone Renewables make sustainable food and agriculture systems more accessible and prevalent outside the industrial scale.

Agriculture · Pittsburgh$208K Equity Crowdfunding
Enersion
February 2023

Enersion is a researcher and developer of cooling, heating, and electricity products.

Consumer Applications · TorontoNon-equity Assistance
Simusolar
February 2025

Simusolar increases rural prosperity by selling and financing productive equipment to farmers and small businesses.

Agriculture · San FranciscoNon-equity Assistance
Uplift Solar
February 2022

Uplift Solar is a manufacturer and producer of smart solar panels and renewable solar energy for easier installation and shade tolerance.

Electronics · Las VegasVenture - Series Unknown
RenewCO2
August 2025

RenewCO2 is a research company that develops processes for converting CO2 into polymers and chemicals.

Chemical · Cranford$4.2M Seed
Radical Plastics
May 2025

Radical Plastics is a radical solution to plastic pollution.

Plastics and Rubber Manufacturing · Beverly$1.0M Venture - Series Unknown
GRAIN Ecosystem
April 2025

GRAIN Ecosystem is a start-up that addresses global warming and accelerates decarbonization.

Environmental Consulting · Quincy$880K Seed
Muon Vision
January 2025

Muon Vision specializes in nuclear imaging sensors, IoT, slope stability, and data mining services.

Mining · Cambridge$2.5M Seed
Enzinc
December 2024

Enzinc is an advanced battery developer that offers rechargeable zinc-air batteries.

Battery · Richmond$8.3M Series A
Renegade Plastics
December 2024

Renegade Plastics offers an alternative to PVC-coated fabrics for a circular plastics economy in industry and agriculture.

AgTech · Golden$2.0M Seed
ACUA Ocean
November 2024

We design, develop and deploy hydrogen- powered uncrewed surface vessels (H-USVs)

Internet of Things · Plymouth$1.9M Pre-Seed
Tidal Metals
September 2024

Tidal Metals produces decarbonized magnesium metal from seawater and desalination waste to reduce salinity.

Mining · Princeton$8.5M Seed
OpConnect
September 2024

OpConnect specializes in EV charging solutions, dedicated to reducing greenhouse gas emissions through transportation electrification.

Electric Vehicle · Tigard$5.3M Venture - Series Unknown
Camus Energy
February 2024

Camus provides a grid orchestration platform to help electric utilities operate and build a reliable, affordable, and zero-carbon grid.

CleanTech · San Francisco$10.0M Series A

Where Cleantech Open invests

Energy8
Renewable Energy6
Agriculture4
Electronics3
Energy Storage3
Solar3

About Cleantech Open's portfolio

How many companies has Cleantech Open invested in?▸

Cleantech Open has invested in 227 companies tracked in our database. The portfolio spans multiple industries and funding stages, from seed-stage startups to late-stage companies.

What industries does Cleantech Open invest in?▸

Cleantech Open's top investment sectors include Energy, Renewable Energy, Agriculture, Electronics, Energy Storage. The firm invests across 60 different industry categories.

What is Cleantech Open's largest investment?▸

Among tracked funding rounds, OxEon Energy received $36.3M in a Grant round. Cleantech Open's total known invested capital is $599.0M.

What is the average investment size for Cleantech Open?▸

Cleantech Open's average investment size is $3.3M across its portfolio of 227 companies.

What are Cleantech Open's most recent investments?▸

Recent Cleantech Open portfolio additions include RePurpose Energy, Elateq, Clean Valley Bio-filtration Technologies, Scalvy, MicroEra Power. These companies were founded in 2020 or later.

Reach the founders behind these 227 companies
Verified emails and LinkedIn profiles, updated monthly.
Get instant access →