/Investor DB

Constellation Technology Ventures — Full Portfolio

31 tracked investments · listed companies and verified rows first

Bloom Energybloomenergy.comin𝕏NYSE: BE

Bloom Energy manufactures solid oxide fuel cell systems for onsite power generation at commercial, industrial, and data center facilities.

CleantechEnergyHardware

K.R. Sridhar(Founder, Chairman, and CEO)KR Sridhar, PhD(Founder, Chairman and Chief Executive Officer)K. R. Sridhar(Founder)KR Sridhar(Founder)

Co-investorsAlumni VenturesArtis VenturesATEL VenturesDag VenturesEnerdigm VenturesG Squared+10 more

C3 AIc3.aiin𝕏NYSE: AI

C3 AI develops an enterprise AI platform that unifies data, intelligent agents, and domain-specific AI models to help large organizations make faster and better operational decisions.

AI & Machine LearningEnterprise SoftwareSaaSSector AgnosticSan Jose, US

Thomas M. Siebel(Founder, Chairman, and CEO)inPaul Phillips(Executive Officer)inEd Abbo(Executive Officer, Director)inChristopher Werner(Executive Officer, Director, Promoter)Dana Jurika(Executive Officer, Director, Promoter)Martin Gallon(Executive Officer, Director, Promoter)

Co-investorsBreyer CapitalSutter Hill VenturesThe Rise FundTPG

Charge Pointchargepoint.comin𝕏NYSE: CHPT

ChargePoint provides networked electric vehicle charging infrastructure and management software for company vehicle fleets and motor pools.

EnergyHardwareIoTLogistics & Supply ChainMobility & TransportationSaaSCampbell, US

Richard Lowenthal(Founder)inPasquale Romano(Executive Officer, Director)inAntonio Canova(Executive Officer)Jonathan Kaplan(Executive Officer)Richard "Rick" Wilmer(President and Chief Executive Officer, Director)Dave Baxter(Founder)

Co-investorsBMW i VenturesBraemar Energy VenturesClearvision VenturesEstag CapitalF4 VenturesMadison Parker Capital+13 more

STEMstem.cominNYSE: STEM

Stem provides an integrated software suite, PowerTrack, for monitoring, developing, deploying, and operating solar and energy storage assets, serving asset owners, operators, and stakeholders in the clean energy sector.

CleantechEnergySaaS

Arun Narayanan(Chief Executive Officer)inBrian Musfeldt(Chief Financial Officer)inSaul R. Laureles(Chief Legal Officer and Corporate Secretary)inMichael Carlson(President, Managed Services & OEM Hardware)inMatt Tappin(President, Software Products)in

Co-investorsACTIVATE CAPITAL PARTNERSPUSH VenturesWIND VenturesAngeleno GroupGE VenturesMithril Capital Management

SWTCHswtchenergy.cominJun 2025✓ verified

SWTCH provides EV charging solutions for buildings that leverage existing electrical infrastructure, enabling cost-effective charging deployment and support for growing EV adoption in the built environment.

CleantechConstruction TechEnergySaaS

Carter Li(Founder & CEO)in

Co-investorsAligned Climate CapitalActive Impact InvestmentsBlue Earth Capital AGPaceZero Capital Partners

analogrxlist.comFeb 2025

RxList is an online medical resource providing detailed pharmaceutical information on brand and generic drugs, written and reviewed by pharmacists and physicians.

Digital HealthHealthtechMedia & EntertainmentSan Clemente, US

Co-investorsHealthCapACVC PartnersAlleyCorpAnzu PartnersIn-Q-TelMaverick Silicon+4 more

AtmosZeroatmoszero.energyin𝕏Mar 2026 · $21M

AtmosZero builds modular electrified heat pump boilers that draw heat from ambient air to produce emissions-free industrial steam as a drop-in replacement for fuel-burning boilers.

CleantechClimate TechEnergy

Addison Stark(Founder)in

Co-investorsAENUEnergy Impact PartnersThe Engine VenturesMitsubishi Heavy IndustriesStarlight VenturesVXI Capital

bidgelybidgely.com

Bidgely offers UtilityAI, a platform that uses patented energy disaggregation to identify appliance-level usage (such as EVs, HVAC, and heat pumps) from smart meter data alone, without surveys or smart plugs.

AI & Machine LearningEnergySaaS

Abhay Gupta(Founder)inVivek Garud(Founder)in

Co-investorsFuture Energy VenturesSnowflake VenturesIvyCap VenturesKhosla Ventures

DemandQdemandq.aiin

DemandQ provides a software overlay that integrates with a building's existing automation system (via BACnet, Modbus, and other protocols) to reduce peak electricity demand by intelligently queuing HVAC and other equipment operation, without new hardware.

CleantechEnergySaaS

Co-investorsVodia Ventures

EnCharge AIenchargeai.comin

EnCharge AI develops advanced hardware and software solutions for AI computing, focused on semiconductor design and AI systems optimization.

AI & Machine LearningHardwareSemiconductorsSanta Clara, US

Naveen Verma(Founder)inKailash Gopalakrishnan(Founder)inEchere Iroaga(Founder)inEnchere Iroaga(Founder)

Co-investorsACVC PartnersAlleyCorpAlumni VenturesAnzu PartnersIn-Q-TelScout Ventures+5 more

Gridbeyondgridbeyond.comin𝕏

GridBeyond develops a technology platform that manages distributed and flexible energy resources for industrial, commercial, utility, and institutional organizations worldwide.

AI & Machine LearningCleantechEnergyEnterprise SoftwareIoTSaaSCork, IE

Michael Phelan(CEO)inPadraig Curran(CTO & Co-Founder)Richard O'Loughlin(Deputy CEO)in

Co-investorsEnergy Impact PartnersConstellationMirovaSamsung VenturesAct Venture CapitalACT Venture Capital+4 more

Kevalakevala.comin𝕏

Kevala operates a cloud-based platform that uses energy data analytics to model the electrical grid, forecast electrification impacts, and support siting of solar and storage projects.

CleantechData & InfrastructureEnergySan Francisco, US

ARAM SHUMAVON(CEO, Founder)in

BoardMARK FERRON(Director)

Co-investorsC5 CapitalHigh AlphaThin Line CapitalCercano ManagementCostanoa VenturesPSL Ventures

LevelTen Energyleveltenenergy.comin𝕏Aug 2021

LevelTen Energy operates a platform that connects renewable energy developers with customers and market participants, facilitating project visibility and deal-making in the renewable energy sector.

B2B MarketplacesCleantechClimate TechEnergySaaSSeattle, US

Bryce Smith(Executive Officer, Director)inWilliam Thomas(Executive Officer)

BoardDavid Cohen(Director)inKarly Wentz(Director)inGreg Lyons(Director)Tim Woodward(Director)in

Co-investorsAster CapitalB Capital GroupB4 CapitalE8 AngelsPrelude VenturesTechstars+7 more

Mantelmantel.comAug 2026

Mantel is an online retailer of cycling products including bikes, helmets, wheels, and related gear and accessories.

E-commerceRetail Tech

Co-investorsCourtside VenturesAzimut InvestmentsEni NextShell Ventures

Mantelmantelcapture.cominAug 2026

Mantel Capture, Inc. appears to operate in process engineering and commissioning, with roles referencing boilers, licensing, and research; the page itself provides no explicit statement of the company's product or market.

CleantechClimate TechNew MaterialsCambridge, US

Cameron Halliday(Founder)inDanielle Rapson(Founder)inDanielle Colson(Cofounder)inSean Robertson(Founder)inHoosiweng Ow(Director)

BoardHooisweng Ow(Director)

Co-investorsAlumni VenturesAOKI LABSEni NextNew Climate VenturesThe Engine VenturesThird Derivative+9 more

Mantelmantel.chAug 2026

Mantel Digital AG offers an inkjet printing system that enables high-precision, multicolor digital printing directly onto anodized aluminum surfaces.

Advanced ManufacturingHardwareNew Materials

Co-investorsExelixis CapitalAzimut Investments

Measurablmeasurabl.comin𝕏Jun 2023 · $93M

Measurabl is a sustainability data platform for real estate organizations that enables measurement, management, and reporting of environmental performance across buildings and properties.

Climate TechData & InfrastructurePropTechSaaSSan Diego, US

Matt Ellis(Founder)inLance Onken(Founder)inMaureen(CEO)Waters Maureen(Executive Officer)

BoardLindsay Luger(Director)inLiza Benson(Director)in

Co-investorsBroadscaleBuilding VenturesCamber CreekConcrete Venture CapitalCrosscut VenturesEnergy Impact Partners+10 more

More on Operant Networksoperantnetworks.cominSep 2022 · $3.8M

Operant provides security and governance controls for agentic AI systems and Model Context Protocol workflows, enforcing per-action authorization, privacy controls, and audit-ready evidence at the network layer for regulated enterprises.

AI & Machine LearningCybersecurityEnterprise SoftwareRohnert Park, US

Shounok Sinha(Director)David Bass(Executive Officer, Director)Keith Rose(Executive Officer, Director)Rod Sugiyama(Executive Officer)Randall King(Executive Officer, Director)Robert MacDonald(Executive Officer)

Co-investorsMSIVThin Line CapitalMarin Sonoma Impact Ventures

Posigenposigen.comDefunct

PosiGen is a residential solar company that installs and services solar energy systems for homeowners, including system monitoring and billing.

CleantechClimate TechEnergyMetairie, US

Thomas Neyhart(Executive Officer, Director)inBenjamin Norwood(Executive Officer, Director)

BoardMatthew Woods(Director)Margaret Anadu(Director)Aaron Dirks(Director)Timothy Anderson(Director)

Co-investorsBuilders FundCallais Capital ManagementCeniarthSJF VenturesBrookfield Asset ManagementBuilders+2 more

Proterraproterra.com

Proterra designs and manufactures zero-emission battery systems for commercial vehicles.

CleantechHardwareMobility & TransportationGreenville, US

Ryan Popple(Executive Officer, Director)Eric McCarthy(Executive Officer)C. W. Plummer, Jr.(Executive Officer)Dave Rich(Executive Officer)Christopher BaileyinDale Hill(Founder)

Co-investorsBMW i VenturesConductive VenturesEnergy Impact PartnersEvolution VC PartnersMitsui Global InvestmentObvious Ventures+6 more

Qnovoqnovo.comin𝕏Feb 2022 · $24M

Qnovo develops battery performance technology, offering products and insights focused on improving battery performance for the battery tech industry.

AI & Machine LearningCleantechDeep TechEnergyHardwareMobility & TransportationMilpitas, US

Nadim Maluf(CEO & Co-Founder)inDania Ghantous(Co-Founder & VP, Technology)in

Co-investorsClimate InvestmentIntel CapitalUS Venture PartnersKIARockPort Capital PartnersU.S. Venture Partners

SolarBridge Technologiessunpower.comin𝕏Feb 2014Acquired

SunPower provides residential solar systems, installing monocrystalline solar panels on homeowners' roofs to lower electricity bills and reduce carbon emissions.

CleantechClimate TechEnergyHardwareSan Jose, US

Dick SwansoninWill Anderson(Co-founder)Dave Anderson(Co-founder)Patrick Chapman(Executive Officer)inPhilip T. Krein(Director)Eric Branderiz(Executive Officer)in

Co-investorsEcosystem Integrity FundPrelude VenturesBattery VenturesRho Ventures

SolarBridge Technologiessolarbridgetech.comin𝕏

SolarBridge develops microinverters and power electronics solutions for solar energy systems.

CleantechEnergyHardwareAustin, US

Patrick Chapman(Co-founder, Chief Technology Officer and Vice President, Advanced Development)

Co-investorsBattery VenturesRho Ventures

Sparkfundsparkfund.comin𝕏

Sparkfund provides deployment services to utilities for distributed energy resources (DERs), helping them design, deploy, and manage DER projects at scale across the grid.

CleantechClimate TechEnergyEnterprise Software

Pier LaFarge(Founder & CEO)in

Co-investorsEnergy Impact PartnersAlumni VenturesE8 AngelsInnovation DepotMount Pleasant VenturesRET Ventures

Sunairiosunairio.comin𝕏Dec 2024

Sunairio develops grid forecasting software that integrates energy, weather, and climate data to help energy traders, grid operators, and renewable asset developers optimize commercial decisions.

AI & Machine LearningCleantechClimate TechData & InfrastructureEnergyInsurTechBaltimore, US

Rob Cirincione(Founder & CEO)inMitchell Walk(Director)

BoardAlex Behar(Director)inDavid Arcara(Director)

Co-investorsBuoyant Ventures Management, LlcKeiki CapitalMassMutual VenturesMVPRosecliff VenturesTechstars+1 more

Tandem PVtandempv.comin𝕏Jan 2022

Tandem PV manufactures high-efficiency perovskite-silicon tandem solar panels designed for U.S.-based commercial-scale production, serving electricity demand from AI, electrification, and data infrastructure.

CleantechEnergyHardwareSilicon Valley, US

Colin Bailie(Founder)inChris Eberspacher(Founder)inScott Wharton(CEO)in

BoardRik Wehbring(Director)

Co-investorsEclipseEclipse VenturesBand of AngelsBeyond Earth VenturesCongruent VenturesNew Climate Ventures+2 more

Voltservervoltserver.cominMar 2023

VoltServer develops fault-managed power distribution systems (Digital Electricity) for delivering electrical power to buildings and infrastructure projects.

CleantechData & InfrastructureEnergyHardwareEast Greenwich, US

Steve Eaves(Founder & CEO)inCharlie Garcia(CFO)Stanley J. Mlyniec(CTO)inKen Hydzik(EVP of Global Sales)Amber Fortney(Senior Director of Marketing / VP of Marketing)Ronna Davis(VP of Business Development / CRO)in

Co-investorsClean Energy VentureSlater Technology FundClean Energy Ventures

Vutilitivutiliti.comin

Vutility provides hardware devices that monitor energy consumption across commercial and industrial operations, delivering real-time data to help businesses measure, allocate, and optimize power usage.

CleantechEnergyEnterprise SoftwareHardwareIoT

Co-investorsSQN Venture Partners, LLCChevron Technology VenturesCycle CapitalDamgaard CompanyDawn CapitalSeed Capital Limited

XGS Energyxgsenergy.cominJan 2024 · $20M

XGS Energy develops a proprietary solid-state, closed-loop geothermal system that uses thermally conductive materials and a pipe-in-pipe heat exchanger to generate clean, round-the-clock power without dependence on water or specific rock geology.

CleantechClimate TechEnergyPalo Alto, US

Richard Chong(Chief Financial Officer)inMichael Danaher(Executive Officer)Ghazal Izadi(Executive Officer)inJoshua Prueher(Executive Officer, Director)Glen Robinson(Director)David Seldin(Director)

Co-investorsAligned Climate CapitalAnzu PartnersClearSkyClimate Innovation CapitalThin Line CapitalValo Ventures+2 more

XL Hybridsxlfleet.comSep 2017

EnergyBoston, US

Thomas J. Hynes III(Executive Officer, Director)Clayton W. Siegert(Executive Officer)Neal Isaacson(Executive Officer)

BoardWilliam K. Aulet(Director)Richard Canny(Director)

Co-investorsClean Energy VenturesExelon

Other

Tracked investments with no reachable website or further public details — typically companies that wound down, renamed, or were absorbed.

eCurv

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.