Funded Cleantech startups in the US
55 cleantech startups in the US have filed a Form D with the SEC and together report $697.7M raised. Sila Nanotechnologies has the largest latest round, at $309.6M. Amounts are as reported on the filing, not estimates.
Updated Jul 22, 2026
- Companies
- 55
- Total raised
- $697.7M
- Filings
- 68
- Median round
- $2.4M
- States
- 25
CompanyStateCityLast filingLatest round
ClearSign TechnologiesUltra-low NOx burner technology for refineries and boilers
Oklahoma
Tulsa
Jul 22, 2026
$1.8M
Sila NanotechnologiesSilicon anode powder that replaces graphite in batteries
California
Alameda
Jul 17, 2026
$309.6M
CopperBattery-equipped induction range for standard outlets
California
Berkeley
Jul 15, 2026
$9.8M
H2PlusWater treatment that destroys PFAS forever chemicals
Colorado
Grand Junction
Jul 14, 2026
$828K
Infinite CoolingCooling tower retrofit that captures water from the plume
Massachusetts
Malden
Jul 2, 2026
$5.3M
NovaSolixCarbon nanotube antenna solar cells
California
Newark
Jun 28, 2026
$125K
Resource MonitorCellular water meters for small and rural water systems
District of Columbia
Washington
Jun 24, 2026
$1.1M
CapturaCarbon removal that pulls CO2 from seawater
California
Pasadena
Jun 18, 2026
$53.5M
HighT-TechCatalysts and battery materials from ultrafast sintering
Maryland
Beltsville
Jun 15, 2026
$350K
Lilac SolutionsIon-exchange beads that extract lithium from brine
California
Oakland
Jun 12, 2026
$34.4M
Eco-ShelterEngineered bamboo panels for roofing and interiors
Washington
Tacoma
Jun 5, 2026
$550K
ViatecBattery power take-off systems for work trucks
South Carolina
Piedmont
May 29, 2026
$300K
Green Evolution TechnologiesWater-storing soil hydrogel for farms
Nevada
Las Vegas
May 27, 2026
$400K
Lakril TechnologiesBio-based acrylic acid made from plant sugars
Illinois
Chicago
May 19, 2026
$30K
Tidal VisionChitosan made from discarded crab and shrimp shells
Washington
Bellingham
May 18, 2026
$19.0M
Persefoni AICarbon accounting and climate disclosure software
Arizona
Mesa
Apr 23, 2026
$4.3M
Ryp LabsStickers that extend the shelf life of fresh produce
Washington
Bothell
Apr 20, 2026
$108K
Kora PowerHome battery, smart panel and inverter in one system
California
Rancho Cordova
Mar 25, 2026
$5.3M
AquiSenseUV-C LED water disinfection systems
Kentucky
Erlanger
Mar 20, 2026
$2.2M
CarbonDropEngineered seaweed that captures and stores carbon dioxide
California
Palo Alto
Mar 19, 2026
$19.6M
Next TFXReverse osmosis membranes for brine and lithium recovery
California
Los Angeles
Mar 5, 2026
$1.3M
Agrela EcosystemsSolar-powered plant, soil and weather sensors
Missouri
St. Louis
Feb 17, 2026
$415K
Verde TechnologiesPerovskite thin-film solar panels
Vermont
Burlington
Jan 8, 2026
$3.0M
CruxeonPrivate research and development company focused on creating…
California
Stockton
Dec 4, 2025
N/A
Compact Membrane SystemsMembrane separation for carbon capture and olefins
Delaware
New Castle
Nov 24, 2025
$10.3M
Positron ChargingEV charging that shares one power feed across many stalls
Washington
Vancouver
Oct 3, 2025
$750K
Big BInnovative company focused on achieving social and…
Tennessee
Nashville
Sep 22, 2025
$1.6M
DayFiTokenized yield from residential solar and batteries
Minnesota
Minneapolis
Aug 21, 2025
$600K
ConamixLithium-sulfur battery cathode materials
New York
Ithaca
Jul 15, 2025
$6.0M
Voltic ShippingSolar-powered electric cargo ships
Pennsylvania
Laughlintown
Apr 8, 2025
$1.3M
Grain EcosystemSoftware for funding and certifying biochar projects
Massachusetts
Quincy
Mar 28, 2025
$880K
Volteras TechnologiesAI battery health monitoring for EV fleets
—
—
Mar 28, 2025
$14.6M
Liitto TechnologyComputing that runs on surplus clean energy
California
Palo Alto
Mar 27, 2025
$4.7M
PollenDrone and satellite crop analytics for farmers
Missouri
Kansas City
Mar 27, 2025
$30.7M
SkySpecsBlade inspection software for wind farm operators
Michigan
Ann Arbor
Mar 17, 2025
$10.4M
MOVA TechnologiesSorbent systems that capture pollutants from air
Virginia
Pulaski
Mar 13, 2025
$26K
Living Ink TechnologiesAlgae-based black pigments that replace carbon black
Colorado
Berthoud
Feb 28, 2025
$4.9M
MombakCarbon removal credits from Amazon reforestation
—
—
Feb 28, 2025
$31.3M
En SolucionNanobubble ozone sanitizing for food processors
Texas
Austin
Feb 27, 2025
$8.7M
Equilibrium EnergyAI tools for managing energy portfolios and trading
Massachusetts
Boston
Feb 25, 2025
$25.7M
Freshr Sustainable TechnologiesAntibacterial compostable packaging for seafood and beef
—
—
Feb 19, 2025
$3.4M
EarthviewContinuous gas leak monitoring for oil and gas sites
Texas
Dallas
Feb 17, 2025
$300K
ContinuumSoil health data for regenerative farming
Iowa
Washington
Feb 7, 2025
$224K
FreshTech SolutionsOn-site disinfectant made from salt and water
Washington
Vancouver
Feb 5, 2025
$500K
MoteHydrogen from waste biomass with carbon storage
California
Los Angeles
Feb 3, 2025
$13.1M
Topanga.ioReusable packaging programs for food service
California
Los Angeles
Jan 27, 2025
$7.7M
MacroCycle TechnologiesPlastic recycling technology
Massachusetts
Cambridge
Jan 21, 2025
$4.0M
Glimpse EngineeringCT scanning that finds defects in battery cells
Massachusetts
Somerville
Dec 27, 2024
$10.0M
MiticoMetal carbonate carbon capture for industrial plants
California
Pasadena
Dec 23, 2024
$6.4M
Solar Transport SystemsTwo-seat solar electric car for developing regions
Florida
Palm Bay
Sep 17, 2024
$450K
DivirodWater level sensing from reflected satellite signals
Colorado
Boulder
Sep 6, 2024
$2.0M
Incaendium InitiativeDedicated to addressing the challenges associated with…
Ohio
Rocky River
Aug 2, 2024
$3.0M
ExsolveBattery metal recovery from industrial waste
Minnesota
Minneapolis
Mar 21, 2023
$4.2M
Kinetic DriveFlywheel drivetrain that recovers vehicle braking energy
Texas
Cleburne
Feb 6, 2023
$332K
Rho ImpactImpact forecasts for climate technologies and investments
Virginia
Charlottesville
Oct 21, 2022
$1.1M
All 55 companies · most recent filing first
Most recent filings
55All 55 companies · most recent filing first