Fundraising FoxDiamondStream Partners
Venture capitalSeattle · Series A–Growth · 4 people tracked
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Investment thesis
DiamondStream Partners invests in next-generation aerial mobility and related businesses, viewing electrically powered air travel as a way to substitute car and truck trips, open underserved markets, enable economic development of isolated regions, and cut carbon emissions. The firm primarily targets middle-stage companies in the US, Europe, and other English-speaking countries within its thematic focus on aerospace, aviation-related, hardware, and software businesses. Its stated edge lies in linking industry and business economics to market-stimulation strategies, building specialized investment theses around sector competitiveness versus automobiles, platform needs, value-chain choke points, and defensibility from patents and certification. It favors companies with solid prospects in existing markets and long-term upside from new technologies.
Source: firm website, verified Oct 2, 2026.
Team · 4 people
from the firm's website
What they invest in
from 8 of 9 portfolio companiesHardware ×6Deep Tech ×5Cleantech ×3Robotics ×3AI & Machine Learning ×2Advanced Manufacturing ×1Climate Tech ×1Defense Tech ×1
HQs:United States×7Switzerland×2
Investments · 9 tracked
founders shown can be your intro pathBaltimore, US
Anthony Pucciarella(Executive Officer, Director, Promoter)Scott Plank(Director)
Ampaire develops hybrid-electric propulsion systems for aircraft, with the AmpDrive technology deployed across multiple aircraft types to reduce fuel consumption, maintenance costs, and noise emissions.
CleantechClimate TechEnergyHardwareSpace TechLos Angeles, US
Kevin Noertker(Founder)inCory Combs(Founder)inRyan Bilton(Executive Officer, Director)
Co-investors1955 CapitalAutodesk FoundationHemisphere Ventures LLCSand Hill AngelsTechstarsClimate Capital+3 more
Elroy Air develops autonomous hybrid-electric aircraft for heavy-payload cargo delivery, serving commercial logistics, defense, and humanitarian customers.
Deep TechHardwareLogistics & Supply ChainRoboticsCalifornia, US
Dave Merrill(Founder & Executive Chairman)inClint Cope(Founder)inAndrew Clare(Chief Executive Officer)inDavid Merrill(Founder)
BoardDarren Liccardo(Director)in
Co-investorsShield CapitalSnowpointAster CapitalCatapult VenturesCity LightCubit Capital+13 more
GPMS develops helicopter health management and condition monitoring systems for the aviation maintenance industry.
AI & Machine LearningDeep TechHardwareIoTVermont, US
Eric BechhoeferinJed KalksteininJohn Taylor(Director)John Schweizer(Director)
BoardMatthew Porat(Director of Issuer)Brian Flynn(Director of Issuer)
Co-investorsHearst VenturesVermont Center for Emerging Technologies (VCET)
JetZero designs and builds a blended-wing-body commercial jetliner for commercial aviation; the company is developing a full-scale demonstrator airplane slated to fly in 2027 with funding and support from the U.S.
Advanced ManufacturingCleantechDeep TechLong Beach, US
Tom O'Leary(CEO, Co-founder)inMark Page(Co-founder)inRene Sagebien(Executive Officer, Director)in
BoardPat ShanahanEric Hirshberg
Co-investorsAdvection Growth CapitalB Capital GroupB4 CapitalCongruent VenturesTribeca Venture PartnersTrucks VC+1 more
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SwissDrones builds unmanned helicopter platforms, such as the SDO 50, used for aerial data gathering, inspection of critical infrastructure (power lines, gas and oil pipelines), search-and-rescue missions, and surveying.
Deep TechHardwareRobotics
Co-investorsBoundary Holding
VerdeGo Aero develops and manufactures hybrid-electric powerplant and propulsion systems that combine conventional fuels with electrified propulsion for electric aircraft and large drones.
CleantechDefense TechHardwareDaytona Beach, US
Erik Lindbergh(Director)inEric Bartsch(Executive Officer, Director)inMatthew M. Thomas(Executive Officer)inRichard Anderson(Executive Officer, Director)
BoardDavid Spurlock(Director)Richard Dussault(Director)
Co-investorsFlorida Opportunity Fund
Volantio develops Vector, an agentic AI platform that helps airlines optimize passenger journeys and revenue through real-time demand management, overbooking optimization, and operational disruption resolution.
AI & Machine LearningEnterprise SoftwareMarketing TechSaaSTravel & HospitalityAtlanta, US
Fenn Bailey(Founder)Azim Barodawala(Founder)inGregory Warner(Director)
Co-investorsJetBlue VenturesSKY VCY CombinatorAgrolimen VenturesAmadeus Ventures
Wingtra builds aerial survey drones (such as the WingtraRAY) along with a connected app for planning, capturing, processing, and exporting mapping data into CAD and GIS workflows.
Deep TechHardwareRoboticsZürich, CH
Elias Kleimann(Founder)inMaximilian Boosfeld(Founder)in
Co-investorsBrick Mortar VenturesVerve VenturesACE & CompanyEquityPitcher VenturesEuropean Innovation Council Fund
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Portfolio news
latest coverage across their companiesWingtra · wingtra.com · Mar 4, 2026
Frequently asked questions
- How many investments has DiamondStream Partners made?
- DiamondStream Partners has 9 tracked investments.
- What stage does DiamondStream Partners invest at?
- DiamondStream Partners invests at the Series A, Series B, Growth stages.
- What sectors does DiamondStream Partners focus on?
- DiamondStream Partners focuses on AI & Machine Learning, Cleantech, Deep Tech, Hardware, Logistics & Supply Chain, Mobility & Transportation, SaaS, Space Tech, Travel & Hospitality.
- Where is DiamondStream Partners located?
- DiamondStream Partners is headquartered in Seattle, US.
- Who does DiamondStream Partners co-invest with?
- DiamondStream Partners most often shares deals with Hemisphere Ventures LLC, B Capital Group, Homebrew, among 33 tracked co-investors.
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