Fundraising Fox3x5 Partners
Venture capitalPortland
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Fund manager profile
3x5 Partners is a venture fund manager based in Portland. SEC filings show 1 venture fund on record, most recently 3x5 Partners Fund III, L.P. filed December 2018.
Source: SEC EDGAR Form D filings. Firm website data not yet available.
What they invest in
from 11 of 14 portfolio companiesCleantech ×4Biotech ×3Climate Tech ×3Energy ×3Hardware ×3Healthtech ×2Impact & Social Good ×2New Materials ×2
HQs:United States×11
Investments · 14 tracked
founders shown can be your intro pathBy year:2026 · 12022 · 32021 · 12020 · 12017 · 22015 · 210 dated
Fervo Energy develops next-generation geothermal technology using advanced drilling and sensing techniques to unlock carbon-free, 24/7 power generation in previously uneconomic locations.
CleantechClimate TechEnergyHouston, US
Tim Latimer(Founder)inJack Norbeck(Founder)in
BoardDavid Thomas Danielson(Director)inNicholas Walrod(Director)inIon Yadigaroglu(Director)
Co-investorsB Capital GroupB4 CapitalBaruch Future VenturesBeast VenturesBreakthrough Energy VenturesCarbon+16 more
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Portland, US
Plasse Ken(Executive Officer, Director)
BoardTyler Mayoras(Director)Nicholas Walrod(Director)inChuck Templeton(Director)inMark Shaughnessy(Director)
Board seatAnthony Arnerich· per SEC Form D · $32.2M raise · filed May 2017
Co-investorsBlueberry VenturesCollaborative FundS2G Investments
EnergyOakland, US
James C David(Executive Officer, Director)Woody Gibson(Executive Officer)Stewart Ramsay(Executive Officer, Director)
BoardJay Schmelter(Director)inFrederick Buckman(Director)
Board seatAnthony ArnerichNicholas Walrod· per SEC Form D · $85.8M raise · filed Jan 2020
Co-investorsAlumni VenturesEnergy Transition VenturesRiverVest Venture Partners
Vapotherm manufactures high-velocity therapy devices for respiratory distress treatment across patient populations.
HardwareHealthtechMedical DevicesExeter, US
JOSEPH ARMY(Executive Officer, Director)JOHN LANDRY(Executive Officer)in
BoardJASON LETTMAN(Director)GEOFF PARDO(Director)inSAMUEL BRASCH(Director)
Board seatAnthony Arnerich· per SEC Form D · $20M raise · filed Jul 2015
Co-investorsCross Creek AdvisorsKaiser Permanente VenturesQuestMark PartnersGilde HealthcareMorgenthaler
Wildfire Water Solutions provides water supply and logistics infrastructure for firefighting operations in fire-prone communities, serving wildland and structural firefighting teams to support rapid response and resource efficiency during extended fire seasons.
CleantechClimate TechHardwareImpact & Social GoodBend, US
Brianna Blazek(Executive Officer)inMichael Echols(Executive Officer, Director)in
BoardMatt Diserio(Director)Chris George(Director)John Schmitz(Director)
Board seatAnthony Arnerich· per SEC Form D · $8M raise · filed Jul 2026
Developing a new class of antifungal medicine to overcome limitations of current therapies.
Co-investorsBioBritGolden SeedsKeiretsu ForumPappas CapitalSofinnova VenturesArix Bioscience+4 more
Bonum Therapeutics develops antibody-controlled protein therapeutics that remain inactive until bound to their target, using a sensor-domain mechanism to deliver regulated, targeted activity.
BiotechHealthtechSeattle, US
John Mulligan(Executive Officer, Director, Promoter)inNeela Patel(Executive Officer)inDiane Hollenbaugh(Executive Officer)in
BoardSamuel Bjork(Director)inMonique Schiersing(Director)inJohn McKearn(Director)in
Co-investorsRiverVest Venture PartnersRoche Venture FundVivo CapitalCodon CapitalDigitalis Ventures
Claros Technologies develops PFAS ("forever chemical") detection, analytical testing, and destruction technologies that eliminate PFAS at the source at commercial scale, serving PFAS manufacturers and companies facing environmental regulation and liability.
CleantechClimate TechNew MaterialsSaint Paul, US
Abdennour Abbas(Executive Officer, Director)inMichelle Bellanca(CEO & Co-Founder)inKyle King(Executive Officer)inJohn Brockgreitens(Executive Officer)
BoardJames Leslie(Director)Nicholas Walrod(Director)
Co-investorsEcosystem Integrity FundGROOVE CAPITALTechFoundersBush FoundationGroundswell Ventures
Enzinc develops zinc micro-sponge anode battery technology for energy storage, working to bring production-ready battery systems to market through battery manufacturing partners.
CleantechEnergyHardwareNew MaterialsSan Anselmo, US
Michael Burz(Chief Executive Officer and Founder)inDeborah Knuckey(Cofounder & Chief Marketing Officer)Adam Buckfelder(Chief Financial Officer)Jenna Lynch(Chief People Officer)inMichael Galluzzo(Chief Technology Officer)inWilliam Cogen(Director)
Co-investorsTO VCAvesta FundE8 AngelsNeer Venture PartnersThird Derivative
Portfolio company acquired by Roche.
BiotechSeattle, US
John Mulligan(Executive Officer, Director, Promoter)inMitchell Mutz(Director)Nicholas Walrod(Director)
BoardJohn McKearn(Director)inKarl Handelsman(Director)
Co-investorsDigitalis VenturesRiverVest Venture PartnersCodon CapitalRoche Venture Fund
Kaleidoscope provides scholarship and grant management software for organizations running award programs, helping match applicants with funding opportunities.
EdTechFintechImpact & Social GoodSaaS
Co-investorsGROOVE CAPITALRally Ventures Management, Llc
K-Scope produces an award-winning network of podcasts and media content, and offers brand partnerships that create sponsored storytelling to reach targeted audiences.
Media & Entertainment
Co-investorsBurda Principal InvestmentsRally Ventures Management, Llc
Kaleidoscope provides a software platform for scientific R&D teams to track and communicate project data, manage complex research processes, and accelerate decision-making.
BiotechEnterprise SoftwareSaaSNew York City, US
Ewan Taylor(CSO and Co-founder)Geraldine Paulus(Co-founder, VP Operations)Brian Naughton(Co-founder and CTO)inDavid Yen(Founder)inBogdan Knezevic(Founder)in
Co-investorsAIN VenturesBurda Principal InvestmentsHAWKTAILHummingbird VenturesNorth Base MediaDimension Capital+1 more
Other
Tracked investments with no reachable website or further public details — typically companies that wound down, renamed, or were absorbed.
Fish People
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.
Exits · 2
1 IPOs · 1 acquisitionsFervo EnergyNASDAQ: FRVOGood Therapeuticsacq. by Roche
Portfolio news
latest coverage across their companiesClaros Technologies · finsmes.com · Jul 28, 2026
Bonum Therapeutics · biospace.com · Jun 10, 2025
Frequently asked questions
- How many investments has 3x5 Partners made?
- 3x5 Partners has 14 tracked investments, 2 of which have exited, including 1 dated in the last 24 months.
- What sectors does 3x5 Partners focus on?
- 3x5 Partners focuses on Biotech, Climate Tech, Energy, Healthtech.
- Where is 3x5 Partners located?
- 3x5 Partners is headquartered in Portland, US.
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