Department of Energy — 2021 Investments
99 investments dated 2021 · listed companies and verified rows first · show all
AAPlasma is an engineering company that researches and develops advanced oxidation processes using non-equilibrium "cold" plasma, UV, and high-voltage electronics, and partners with industry clients to integrate these systems for applications like air cleaning, water treatment, disinfection, and food safety.
CleantechDeep TechNew MaterialsPhiladelphia, US
Greg Fridman(Co-founder)Charles Bailey(Co-founder)
The company uses mathematical modeling and software to identify vulnerabilities in combined cyber-physical-human systems and locate where attacks would cause the most damage.
CybersecurityDeep TechDefense Tech
Advanced Materials Scientia (AMS) develops engineered proppants designed for high-temperature brine durability in enhanced geothermal systems (EGS) and superhot geothermal wells.
CleantechEnergyNew Materials
Berkeley, US
James Matthew Mason(Executive Officer, Director)Bear Kaufmann(Executive Officer)Alejandro Abalos(Executive Officer)
BoardTom Dinwoodie(Director)Dan Kammen(Director)
Anadyne designs and sells high-precision analog integrated circuits, including logarithmic video-bandwidth amplifiers and operational amplifiers such as the PL200 and PA500 for analog signal processing.
Deep TechHardwareSemiconductorsSanta Cruz, US
Brooklyn, US
John Levy(Director)William Gleeson(Executive Officer)Christopher Carney(Executive Officer)Mario Concha(Director)Andre Zeitoun(Executive Officer, Director)Robert Betz(Director)
Artium develops and manufactures particle characterization instruments used to measure sprays, clouds, and aerosol droplets for energy, environmental, and industrial applications.
Climate TechDeep TechHardware
BST Systems designs, develops and manufactures precision-engineered critical components for power systems, including high-energy cells, batteries and support electronics for applications ranging from deep-sea to space.
Advanced ManufacturingEnergyHardware
Burch Energy provides energy efficiency services including energy engineering, HVAC control design and build, and equitable utility program delivery for building owners and low-income communities.
CleantechClimate TechEnergyPortland, US
Brian Allbritton(Executive Director)
Carbon Solutions develops software and provides research and consulting services for carbon capture, transport, and storage (CCS), including tools for CO2 pipeline routing, storage screening, life-cycle analysis, direct air capture assessment, and hydrogen and renewable energy systems analysis.
CleantechClimate TechEnergy
Richard Middleton
Cerfe Labs develops new low-cost memory technology based on Correlated Electron (CeRAM) switches designed to scale to advanced semiconductor nodes.
Deep TechHardwareSemiconductors
ChannelScience develops hardware and software for reading and preserving data from legacy magnetic tapes produced between the 1960s and 2000s.
Data & InfrastructureDeep TechHardware
Community Energy Labs develops energy management technology that optimizes building energy use in alignment with renewable energy production and occupant comfort.
CleantechEnergyEnterprise Software
Delivers state-of-the-art magnetics to enable power electronics components that are 90% smaller and 50% more efficient
EnergyHardwareNew MaterialsPittsburgh, US
Samuel Kernion(PRESIDENT)
Delphire develops the Sentinel FD3, a wildfire detection system that uses visual and infrared cameras plus chemical sensors to detect ignitions and smoke, then sends push notifications with images and GPS coordinates for rapid visual confirmation and fire response.
AI & Machine LearningClimate TechHardware
Emrgy develops distributed hydropower systems that generate renewable electricity, positioning itself in the clean energy and climate technology space.
CleantechClimate TechEnergyAtlanta, US
Emily Morris(Chief Executive Officer & Founder)Tom Cuthbert(Chief Technology Officer)
BoardJennifer McFarlane(Director)Anastasia Istratova(Director)Justin Wright-Eakes(Director)Bob Kelly(Director)
Heartland Farm Energy develops technologies for rural infrastructure supporting food and energy production.
AgTechEnergy
ENERlite Consulting provides building performance consulting that integrates daylighting, thermal comfort, and energy simulation for design teams and building owners, using building energy modeling, AI-assisted calibration, and green building certification services.
CleantechConstruction TechEnergySacramento, US
Ladan Ghobad(Founder)
Epsilon Innovation Group is a consulting and R&D firm focused on energy, climate change, nature-based solutions, blue economy, and AI-driven data analytics.
CleantechClimate TechEnergy
Extreme Scale Solutions builds and deploys applied AI/ML systems under real-world constraints such as latency, cost, security, and privacy, spanning FPGA and embedded edge inference, enterprise RAG/Graph-RAG knowledge systems, encrypted ML inference, and distributed training at supercomputer scale.
AI & Machine LearningDeep TechEnterprise Software
Floating Island International develops patented BioHaven floating island systems and its RAM (Removal of Aquatic Methane) technology, which oxygenate the bottom of ponds, lakes, and reservoirs to suppress methane, reduce sludge, prevent algae, and recover valuable resources.
CleantechClimate TechHelena, US
GlycoSurf produces high-purity (>95%) bio-inspired glycolipid and rhamnolipid surfactants using a green chemistry synthetic process, with sugar head-groups including glucose, galactose, and xylose and customizable chain lengths.
BiotechCleantechNew Materials
Guild Associates develops engineered systems and adsorptive, reactive, and catalytic materials for applications including decontamination, chemical defense, and demilitarization.
Deep TechDefense TechNew Materials
HartSCI (Hart Scientific Consulting International) develops ClearStar adaptive optics and free-space optical communication systems that improve telescope resolution for smaller ground-based instruments.
Deep TechDefense TechSpace TechTucson, US
Michael Hart(President)
Hawaii Fish Company operates a freshwater aquaculture and aquaponics farm in Hawaii, raising tilapia and other fish and shellfish species along with aquaponic produce using closed-loop, sustainable systems.
AgTechCleantechFoodTech
Ron
Hexas produces regenerative plant-based raw materials from proprietary varieties of a fast-growing perennial grass (XanoGrass), delivering a fiber (XanoFiber) that serves as a drop-in replacement for wood, food-crop, and fossil-fuel-based feedstocks.
CleantechClimate TechNew Materials
Hive Power Engineering (HPE) is an engineering design and consulting firm specializing in electrical power transmission and distribution, offering substation design, protection and control, relay settings, renewables integration, and power system studies.
CleantechEnergy
Hydronalix builds man-portable unmanned surface vessels for the U.S. military, with mission capabilities including real-time sonar and bathymetry mapping, autonomous patient transfer and cargo logistics, and maritime domain awareness.
Defense TechHardwareRobotics
Impossible Sensing develops optical sensing technology designed for extreme environments, from space exploration to deep ocean, and adapts these off-world applications to address environmental challenges on Earth.
Deep TechHardwareSpace Tech
San Jose, US
Peter Chidyllo(Director)Ritobrata Sur(Executive Officer, Director)
Integral is an environmental and human health consulting firm that provides scientific, engineering, and regulatory services, including PFAS support, site remediation, ocean intelligence, and litigation and allocation support.
CleantechClimate TechHealthtech
Irradiant operates a 3D nano-optics and photonics foundry, using flexible 3D nano-fabrication and lithography to manufacture optical and photonic components such as metalenses, optical interconnects, and integrated free-space optical microsystems.
Advanced ManufacturingDeep TechHardware
Iso-Pacific develops soil remediation technology, including an automated Soil Sorting System (S3) that detects and extracts contamination from soil to reduce disposal volumes, and the Mapping and Profiling Rover (MAPR) for remediation surveying across varied terrain.
CleantechHardwareRobotics
iZen offers an AI-enhanced eLearning platform combining a course catalog (iZen-Academy), a learning management system (iZen-LEAP LMS), and hardware (iZen-LEAP Box) that enables online and offline training on any device.
AI & Machine LearningEdTechGovTech
Trackers/SunFarmor makes pre-engineered solar generator systems that let landowners such as row crop farmers, greenhouse and livestock operators, and brownfield or landfill owners produce clean energy, store it in batteries, or make fuel and fertilizer.
AgTechCleantechEnergy
RoCo® develops and manufactures ionic liquids and polymer/ionic liquid materials, including metal salt-based electrolytes, carbon materials, and chemical precursors, sold to industries in energy storage, polymer composites, and materials additives.
Deep TechEnergyNew Materials
LiteSpeed Energy is a solar installation company offering Beamreach Solar SPRINT technology that it markets as enabling faster panel installation.
CleantechClimate TechEnergy
Laser/sensor networks providing low-cost detection and quantification of emission sources across large areas.
Boulder, US
John Bookout III(Director)Ian Dickinson(Executive Officer, Director)R.C. Mercure(Director)James F. Adelson(Director)Gregory B. Rieker(Director, Promoter)H. Robert Gill(Director)
Luminous Cyber builds resilient timing and navigation infrastructure centered on its Temporal Resilience Engine, which fuses a clock ensemble with sensors to preserve trusted, precise time when GPS and other references are degraded or unavailable.
Deep TechDefense TechHardware
MarineSitu offers SaltySuite, a marine monitoring platform combining modular edge hardware with edge AI and a cloud operations hub to acquire, manage, and analyze sensor data.
AI & Machine LearningCleantechHardware
Microwave Techniques designs and manufactures high-power RF and microwave components and systems, including waveguide components, generators, applicators, and industrial microwave processing equipment.
Advanced ManufacturingDeep TechHardwareNashua, US
MineraLogic is an environmental geochemistry consultancy providing science-driven strategy, permitting, and decision support for mining and mineral exploration clients, with expertise in copper, nickel, PGE, and iron ore operations.
CleantechClimate TechDeep TechDuluth, US
Molecular Rebar Design (MRD) develops discrete, surface-tailored carbon nanotubes to improve their dispersability and commercial performance, addressing the gap between theoretical and practical carbon nanotube use.
Advanced ManufacturingDeep TechNew Materials
Nordisch (NordRad) develops multiphysics, AI-driven simulation software that predicts the aging, degradation, and remaining useful life of polymers, elastomers, adhesives, and composite parts (such as cables, O-rings, and thermal interface materials) under combined thermal, radiation, and mechanical stressors.
AI & Machine LearningDeep TechNew Materials
NtreTech is a technology and engineering consulting company focused on developing and deploying clean energy conversion and utilization technologies.
CleantechClimate TechEnergy
OptiMiser is professional energy audit and modeling software for energy contractors and auditors, including utility bill analysis (BPI-2400) and modeled-savings reporting to help qualify projects for efficiency incentive and rebate programs.
CleantechEnergySaaS
OptiPro develops CNC machines and automation solutions for precision optics manufacturing, serving makers of optical components and photonics-based products.
Advanced ManufacturingHardwareRobotics
Otherlab is an independent research and design lab that develops technologies in renewable energy, robotics, and manufacturing, incubating internal projects into spinout companies.
CleantechEnergyRobotics
Saul Griffith(Founder, Chief Scientist)James McBride(Co-founder, CTO)
Parthian Energy develops EMIS, an imaging instrument that measures current density inside battery cells to detect defects such as lithium plating that voltage, temperature, and other fast production-line tests miss.
Deep TechEnergyHardware
Pendar Technologies develops Raman spectroscopy instruments and autonomous chemistry systems for chemical analysis and discovery, including handheld devices for identifying threat materials and tools for real-time reaction kinetics, inspection, authentication, and process control.
Deep TechDefense TechHardware
Pioneer Energy designs and manufactures cloud-enabled, modular hydrocarbon processing systems—including tankless oil production units, field gas conditioners, modular gas plants, NGL fractionators, and emission control valves—for oil and gas producers.
Polykala Technologies develops materials technologies for clean energy and water, including recycling-based production of rare earth metals and oxides, recovery of critical minerals such as copper, cobalt, nickel and noble metals from mine tailings, single-atom catalyst manufacturing, and PFAS-removal membranes, sorbents and filters.
CleantechClimate TechNew Materials
Qflex is a manufacturer of flexible printed circuit boards (flex PCBs), including highly complex multi-layer designs.
Advanced ManufacturingHardwareSpace TechFullerton, US
Renascent Energy is a technology-focused energy company that uses patent-pending Enhanced Geothermal Systems (EGS) and thermal enhanced recovery methods to produce energy from existing, dormant, or depleted shale wells rather than drilling new ones.
CleantechClimate TechEnergyHouston, US
CleantechDecatur, US
RUTE produces and delivers structural foundation systems for the wind and solar energy industries, aimed at lowering the cost of clean electricity and reducing CO2 emissions.
CleantechClimate TechEnergy
Simonpietri Enterprises is a Hawaii-based, woman-owned company that develops and designs renewable fuel manufacturing and waste-to-energy projects, converting construction, demolition, and organic waste into renewable jet fuel, clean hydrogen, fertilizer, and energy.
Circular EconomyCleantechEnergy
Joelle Simonpietri(President)
Solar Dynamics, LLC develops products and services for concentrating solar energy, using engineering tools and design expertise.
CleantechDeep TechEnergyDenver, US
SolarSEED Energy builds affordable, modular solar power systems using patented multi-modal technology that works with any photovoltaic module and various storage devices to generate DC and AC electricity for charging, lighting, tools, and appliances.
CleantechEnergyImpact & Social Good
Steam Instruments develops high-spatial-resolution mass spectrometry technology, including ion detectors, ion imaging optics, and high-mass spectrometer designs for applications such as direct-from-tissue biomolecule mapping, ultra-high-mass biomolecule analysis, sub-micron hydrogen and lithium mapping, semiconductor dopant analysis, and nuclear forensics.
BiotechDeep TechHardware
Structural Composites develops composite materials and technologies for customers in the marine, aerospace, theme park, defense, infrastructure, and road and rail transportation industries.
Advanced ManufacturingDeep TechNew Materials
SubSeaSail (SSS) develops Autonomous Undersea & Surface Vehicles (AUSVs) — including the semi-submersible ISR/observation vessel HORUS and the trimaran cargo/energy-delivery vessel HERMES — that are wind- and solar-powered, long-duration, and can operate above and below water to depths of 100 meters.
Defense TechHardwareRoboticsSan Diego, US
SynchroGrid provides relay setting development, review, and coordination services along with protection and control expertise and NERC compliance support for electric utilities.
EnergyEnterprise SoftwareSaaS
Syyclops provides a platform that consolidates building data and applies AI and IoT-driven analytics to deliver operational insights, equipment analysis, dashboards, and 3D digital twin visualizations.
AI & Machine LearningIoTPropTech
T2M Global offers strategic advisory, technology development, and commercialization services to advanced energy start-ups focused on converting waste resources, such as low-level waste heat, into usable energy.
CleantechClimate TechEnergy
Tactical Computing Laboratories designs advanced computing platforms and optimizes algorithms and runtime models for computationally- and data-intensive workloads, including work on early-access and experimental hardware.
Deep TechHardwareSemiconductors
Taka Solar (Sunspan) develops a patented solar tube technology that uses an aerodynamic, cable-supported "panel-as-structure" design to lower mounting costs, track the sun without moving parts, and resist soiling.
CleantechEnergyHardware
Chris BarnesDavid Frost
Technergetics builds digital solutions for the U.S.
AI & Machine LearningDefense TechQuantum Computing
TERA-print develops nanofabrication instruments based on beam pen lithography (BPL), including its TERA-Fab E series tool that patterns features from 250 nm to over 100 µm using tens of thousands of independently controlled probes.
Deep TechHardwareNew Materials
Theia Scientific makes the Theiascope, an edge-computing hardware device with a browser-based dashboard that applies custom AI/ML models (supporting YOLO v5, v8, and v11) to analyze microscopy and other captured images in real time.
AI & Machine LearningDeep TechHardware
Kevin Field(Co-founder)Christopher Field(Co-founder)
A ventilation industry manufacturer with over 70 years of experience building custom ventilation solutions for its customers.
Advanced ManufacturingHardware
Wildlife Imaging Systems develops computer vision and machine learning software for wildlife biologists and ecologists, using camera systems, video processing, and data management to monitor and protect wildlife.
AI & Machine LearningCleantechClimate Tech
Rows marked “SEC filing” are inferred from directors named on the company's SEC Form D — public regulatory data, not a portfolio list published by the firm.