Earth Capital Limited, established in 2008 and headquartered in London, is a private equity and infrastructure investment firm focusing on growth capital and expansion capital. It specializes in investing in sustainable technology companies dealing with resource and energy constraints, as well as fund of fund investments in private equity funds. The firm targets opportunities in growth, renewable energy, agriculture technology and food, clean industry, resource efficiency, and infrastructure sectors. Earth Capital invests globally, with a focus on Colombia, Latin America, Europe, the United Kingdom, and Africa/Middle East. It typically invests between $5 million to $15 million in companies with an enterprise value of $10 million to $50 million, revenues of $1 million to $5 million, and EBITDA up to $2 million, preferring majority stakes. The firm's experienced team, part of the $1.1bn international group SET3, supports management teams with active, long-term investment and value-added portfolio management.
Ace Aquatec Limited is a company focused on providing innovative technological solutions to the aquaculture and marine industries. Established in 1999 and headquartered in Dundee, United Kingdom, with additional offices in Scotland and Canada, Ace Aquatec specializes in several key areas, including acoustic marine mammal deterrents, humane electrical fish stunning equipment, and underwater 3D cameras for biomass measurement. Their products are designed to enhance animal welfare and promote responsible marine practices. The US3 model of acoustic deterrent serves the fish farming sector by offering advanced features such as data logging and sonar triggering, while the MMD model targets longline fishermen and offshore platforms involved in activities like pile driving and oil spill responses. Through these innovations, Ace Aquatec aims to support sustainable practices in aquaculture and marine operations globally.
Sustainable Energy Holdings
Private Equity Round in 2022
Sustainable Energy Holdings Ltd ("SEHL") was formed by the merger of four of its portfolio companies, all of which produce low-carbon bioenergy. SEHL will boost performance by expanding the platform's asset base through a buy-and-build strategy that includes the acquisition and development of new plants as well as the improvement of existing assets.
Limelight Energy
Acquisition in 2022
Limelight Energy offers solar and energy solutions for self-sufficiency and renewable living.
Propelair
Venture Round in 2022
Propelair is a UK-based manufacturer specializing in innovative toilet systems that prioritize water conservation and energy efficiency. Utilizing its patented POWA™ displaced air technology, Propelair toilets achieve a powerful flush while consuming only 1.5 liters of water, significantly reducing the environmental impact associated with traditional flush systems. This technology not only lowers water usage but also diminishes the energy required for water and waste processing, resulting in an average 80 percent reduction in carbon footprint. Propelair's systems are designed to enhance hygiene and reduce maintenance costs, making them a sustainable and efficient alternative for various settings. The company’s products comply with rigorous environmental standards, including BREEAM and the Code for Sustainable Homes.
SoftIron
Series B in 2020
SoftIron Limited specializes in manufacturing enterprise data storage hardware solutions aimed at enhancing data center operations. Founded in 2012 and based in London, the company offers a range of products, including HyperDrive, a software-defined storage appliance built on Ceph, and Hypercast, which facilitates real-time and file-based video streaming. Additionally, SoftIron provides OverDrive servers, designed for developers and enterprise environments. The company's solutions focus on improving performance across critical metrics such as density, efficiency, capacity, speed, and heat emission, while also eliminating upfront capital expenditures and software vendor lock-in. SoftIron’s appliances are tailored for both private and public cloud environments, as well as large-scale enterprise facilities, enabling seamless integration with existing broadcast and data center infrastructures.
Propelair
Venture Round in 2017
Propelair is a UK-based manufacturer specializing in innovative toilet systems that prioritize water conservation and energy efficiency. Utilizing its patented POWA™ displaced air technology, Propelair toilets achieve a powerful flush while consuming only 1.5 liters of water, significantly reducing the environmental impact associated with traditional flush systems. This technology not only lowers water usage but also diminishes the energy required for water and waste processing, resulting in an average 80 percent reduction in carbon footprint. Propelair's systems are designed to enhance hygiene and reduce maintenance costs, making them a sustainable and efficient alternative for various settings. The company’s products comply with rigorous environmental standards, including BREEAM and the Code for Sustainable Homes.
SoftIron
Series A in 2017
SoftIron Limited specializes in manufacturing enterprise data storage hardware solutions aimed at enhancing data center operations. Founded in 2012 and based in London, the company offers a range of products, including HyperDrive, a software-defined storage appliance built on Ceph, and Hypercast, which facilitates real-time and file-based video streaming. Additionally, SoftIron provides OverDrive servers, designed for developers and enterprise environments. The company's solutions focus on improving performance across critical metrics such as density, efficiency, capacity, speed, and heat emission, while also eliminating upfront capital expenditures and software vendor lock-in. SoftIron’s appliances are tailored for both private and public cloud environments, as well as large-scale enterprise facilities, enabling seamless integration with existing broadcast and data center infrastructures.
Arvia
Series B in 2012
Arvia Technology Limited, established in 2007 and based in Runcorn, UK, specializes in water and wastewater treatment systems. The company's core product is the Organics Destruction Cell (ODC), a tertiary treatment system that combines adsorption and advanced oxidation to remove hard chemical oxygen demand, color, and persistent organic micro-pollutants from wastewater. The ODC uses Arvia's patented regenerating adsorbent, Nyex, to concentrate and continuously oxidize contaminants, ensuring water quality compliance with local discharge regulations or suitability for reuse. Serving industries such as chemicals, food and beverage, pharmaceuticals, and utilities, Arvia's technology offers a cost-effective, chemical-free, and low-maintenance solution for treating hazardous organic chemicals in water.
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