Participated · Series C · Jan 2026

Zanskar combines artificial intelligence, modern drilling techniques, and computational geoscience to find, assess, and develop geothermal energy resources. The company has a portfolio of greenfield geothermal projects, including the Lightning Dock site in New Mexico and recent discoveries at Pumpernickel and Big Blind in Nevada, plus two announced discovery sites in Nevada. Financially, Zanskar completed a $115 million Series C in January 2026 (later expanded with additional investment from Just Climate) and has now closed a $40 million revolving Development Capital Facility structured to scale to $100 million. Zanskar plans to use the new facility to fund pre-construction work and bridge projects to traditional project financing so it can rapidly build multiple geothermal power plants. The company aims to deliver gigawatts of clean, firm power to U.S. customers and expects to create hundreds of jobs as it scales development. Zanskar markets its approach as making geothermal more predictable, lowering development costs, and enabling large-scale deployment of dispatchable baseload power.

Participated · Series A · Nov 2024

Redoxblox is a San Diego company that develops low-cost thermochemical energy storage systems (TCES) designed to accelerate industrial decarbonization and meet long-duration grid storage needs. Its TCES units store energy both chemically and as heat at very high temperatures and can discharge continuously or on demand directly into industrial processes or for electricity generation. The company raised $40.7M in a Series A to expand operations and broaden its business reach. The round was led by Prelude Ventures and joined by Imperative Ventures and New System Ventures, with existing backers Breakthrough Energy Ventures and Khosla Ventures also participating. Redoxblox announced the appointment of Pasquale Romano, formerly President and CEO of ChargePoint and a member of the U.S. National Infrastructure Advisory Council, as its new CEO. Romano will lead the company through its next phase of growth, targeting key industrial heat and long-duration grid-scale storage markets. RedoxBlox develops high-temperature thermochemical batteries that store energy in a proprietary metal oxide material heated to 1000–1500°C, releasing heat and oxygen on charge/discharge to deliver electricity or industrial heat. The system targets decarbonization of hard-to-electrify industrial heat (cement, steel, food & beverage, refining, chemicals) and ultra-low-cost grid storage by acting as a drop-in replacement for natural gas in existing infrastructure. The company says its energy densities compare to lithium-ion at a fraction of the cost. RedoxBlox is partnering with UC San Diego, EPRI and Dow to demonstrate long-duration grid and industrial applications, including a UCSD-hosted turbogenerator demonstration offering up to 24 hours of storage and an industrial-scale project at Dow’s West Virginia plant. The firm is backed by climate investors including Khosla Ventures, Breakthrough Energy Ventures and Red Cedar Ventures.

Led · Equity · Apr 2021

Solidia Technologies develops low-carbon cement and concrete technologies that reduce CO2 emissions in cement production and consume captured CO2 during concrete manufacturing. The company’s products aim to lower the carbon footprint of the cement and concrete industry, which accounts for roughly 8% of global emissions. The new capital will support continued development and deployment of these technologies to accelerate decarbonization of critical building materials industries. Solidia is based in Piscataway, N.J. The $78 million fundraise attracted a range of investors committed to advancing low-carbon industrial solutions. Bryan Kalbfleisch was named CEO and brings over two decades of manufacturing and building-materials leadership experience, including roles at Summit Materials and Oldcastle. Solidia Technologies develops Solidia Cement and Solidia Concrete, which are cured with CO2 instead of water. Its process can reduce carbon emissions by up to 70% and recycle 60–80% of the water used in production. The technology targets the US$1 trillion concrete and US$300 billion cement markets and aims to deliver manufacturer cost savings through faster curing, lower energy and raw material consumption, reduced waste, and lower labor requirements. OGCI Climate Investments has made an investment to support commercialization and global adoption of Solidia’s carbon-recycling technology. Solidia’s investor base includes Kleiner Perkins Caufield & Byers, Bright Capital, BASF, BP, LafargeHolcim, Total Energy Ventures and Bill Joy. The company is based in Piscataway, N.J., and is pursuing wider commercialization through investor and industry partnerships. Solidia Technologies commercializes patented cement and concrete processes that cure concrete with CO2 instead of water, producing higher-performing products that cure in less than 24 hours. Its Solidia Cement and CO2-curing process can reduce carbon emissions by up to 70% and recycle 60–100% of the water used in production. The technology uses the same raw materials and existing equipment as traditional concrete while offering faster curing times, lower energy and raw material consumption, reduced waste, and lower labor requirements. Solidia targets the global concrete and cement markets (estimated at US$1 trillion and US$300 billion respectively) and positions its processes as cost-saving for manufacturers. The company is pursuing commercialization through industry partnerships and collaborative research with organizations including Lafarge, The Linde Group, Rutgers University, Purdue, Ohio University and the University of South Florida. Solidia has received support from U.S. agencies (FHWA and DOE/NETL) and has been recognized by multiple awards and industry lists. Solidia Technologies has developed a proprietary process that uses CO2 as a reactant to create both a binder and concrete products for building and construction. Its binder requires significantly less energy to produce than Portland cement, and its concrete gains strength from CO2 rather than water. The company says these materials deliver excellent physical properties, lower life‑cycle cost, and a smaller environmental footprint than traditional concrete. Solidia was founded in 2008 and is led by CEO Thomas Schuler; it is based in Piscataway, NJ. At the time of the article the company had 28 employees and was actively hiring. The company’s technology underpins a range of potential applications across the building and construction industries.