Fundraising FoxCloudStone Capital
Venture capitalSan Mateo · Seed–Series A · 5 people tracked
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Investment thesis
Cloudstone invests in emerging high-tech fields, having begun with Fund I across healthtech, AI, mobile technologies, robotics and advanced manufacturing. Building on Fund I, the firm expanded its GP team for Fund II to focus exclusively on healthtech across four verticals: medical devices, bio pharma, AI and digital health, and genomics and personalized medicine. Its stated mission is to improve global health and well-being. The firm emphasizes proprietary deal sourcing through academic and medical networks such as Stanford Biodesign and the Fogarty Institute, reviewing more than 300 companies annually. Beyond capital, Cloudstone supports portfolio companies with FDA 510k compliance, follow-on financing, and strategic partnering.
Source: firm website, verified Oct 2, 2026.
Team · 5 people
from the firm's website & public directories
Alexa joined Cloudstone as a Partner in 2020, bringing experience in venture, fixed income, hedge fund and angel investing. She founded merchant banking firm Glade Arch Partners and private equity advisory firm Mille Capital, and was previously a senior banker at Kidder Peabody and Drexel Burnham Lambert. She holds an MBA in Finance from Stanford GSB and a BA from Harvard.
A general partner at Cloudstone who joined in June 2019, Tom is an active angel investor and MedTech board member with multiple exits, including Auris Health's acquisition by Johnson & Johnson. He is Chair Emeritus of Stanford's Department of Surgery and Co-Director of the Stanford Byers Center for BioDesign, and chairs the board of the Fogarty Institute for Innovation.
General partner at Cloudstone VC who joined in June 2019 after collaborating on Fund I portfolio investments. An active angel investor and MedTech specialist, he is Emile Holman Professor and Chair Emeritus of Surgery at Stanford, Co-Director of the Stanford Byers Center for BioDesign, and Chairman of the Fogarty Institute for Innovation, with a notable exit via Auris Health's acquisition by Johnson & Johnson.
A founding partner of Cloudstone Venture Fund and active venture investor since 2012, Yong previously co-founded high-tech companies in Silicon Valley and spent over a decade at Strategic Decisions Group, rising to managing director for Asia Pacific, followed by work at Navigant Consulting. He holds a PhD in Decision and Risk Analysis from Stanford and serves on the board of Paragon Genomics.
A partner at Cloudstone Venture Fund with 30 years of experience in engineering, management, entrepreneurship and venture investing, Mark specializes in healthcare technologies including pharmaceuticals, medical devices and advanced manufacturing. He has held roles at HP, Agilent and Tyco and holds a PhD in biophysical chemistry from Michigan State University.
What they invest in
from 13 of 22 portfolio companiesHealthtech ×8Medical Devices ×7Deep Tech ×5Biotech ×4Hardware ×2Advanced Manufacturing ×1AI & Machine Learning ×1Circular Economy ×1
HQs:United States×7
Investments · 22 tracked
founders shown can be your intro path
Avvio Medical develops Microbubble SonoLithotripsy, a minimally invasive outpatient procedure that uses low-intensity ultrasound to break down ureteral stones without requiring general anesthesia or stents.
Deep TechHealthtechMedical DevicesSan Francisco, US
Co-investorsBaruch Future VenturesBerkeley CatalystMission Bay CapitalMission Biocapital
Delpor develops subcutaneous implant devices that deliver therapeutic drugs over extended periods (6-12 months) for chronic condition treatment.
BiotechHealthtechMedical Devices
Co-investorsKairos Venture Investments, LlcUlu Ventures
Eureka Therapeutics is a clinical-stage biopharmaceutical company developing T-cell-based therapies to treat solid tumors and other cancers.
BiotechHealthtechEmeryville, US
Cheng Liu(Executive Officer, Director)in
BoardSandy Chau(Director)Hsing Kung(Director)Qiushi Fu(Director)Chih-Kai Cheng(Director)inMichael Cannon(Director)
Co-investorsAcorn Pacific VenturesGP CapitalYosemite
Gradiant designs and builds water and wastewater treatment plants using its proprietary technology stack, helping industrial customers reduce freshwater withdrawal, reuse wastewater, and return clean water to the environment.
Advanced ManufacturingCircular EconomyCleantechClimate TechDeep TechWoburn, US
Anurag Bajpayee(Co-Founder & Executive Chairman)inPrakash Govindan(Co-Founder & CEO)inMark Danchak(Director)Jeff Luse(Director)Keith Wilson(Director)Ashok Belani(Director)
Co-investorsCapTableClearvision VenturesGRC SinogreenSafar PartnersWarburg PincusWAVE Equity Partners+1 more
IMVARIA develops AI-driven software-as-medical-device solutions that analyze medical imaging and data to provide non-invasive diagnostic assessments for lung diseases, including idiopathic pulmonary fibrosis and interstitial lung disease.
AI & Machine LearningHealthtechMedical DevicesBerkeley, US
Joshua Reicher(Co-founder & CEO)inMichael Muelly(Co-founder & CTO)in
Co-investorsCreative VenturesInHealth VenturesMeridian Street CapitalStartX
Innowi offers an all-in-one, commission-free restaurant management platform combining POS, self-order kiosks, online ordering, kitchen display, marketing, and analytics.
FoodTechRetail TechSaaS
Biopharmaceutical company developing innovative therapies for chronic diseases using proprietary drug delivery systems.
BiotechBoston, US
James Ahlers(Executive Officer)John Yee(Executive Officer)Sunita Zalani(Executive Officer)Raymond T. Keane(Executive Officer)Thomas Alessi(Executive Officer)Owen Hughes, Jr.(Executive Officer)
Co-investorsBay City CapitalCycad Group LLCForesite CapitalMarkerNXT VenturesAlta Partners+3 more
Magnetic Particle Imaging (MPI) is an imaging technology that detects iron oxide nanoparticle tracers using time-varying magnetic fields to create medical images with high contrast and sensitivity.
Deep TechHealthtechMedical Devices
Co-investors5AM VenturesAimTop VenturesAlumni VenturesEvolution VC PartnersGaingelsInnolinks Ventures+4 more
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Paradromics develops a brain-computer interface (BCI) system, with FDA Breakthrough Device Designations for speech decoding and digital device control, and works with academic medical institutions on translational BCI research.
BiotechDeep TechHealthtechMedical DevicesAustin, US
Matt Angle(Founder and CEO)inRon Kelly(Director)Thomas Krummel(Director)Adam Kablanian(Director)
Co-investors15th RockAlpha EdisonAnthropy PartnersATEL VenturesCapital FactoryCoastCap+27 more
PyrAmes is a digital health company developing a proprietary wireless, non-invasive platform for continuous blood pressure monitoring in patients of all ages, from newborns to seniors.
Digital HealthHardwareHealthtechMedical Devices
Xina Quan(Co-Founder and CEO)in
Co-investorsGSR VenturesKeytone VenturesStartXTexas HALO FundDecent CapitalXTX Markets
32win is an online betting and gaming brand offering sports betting, live casino, slots, card games, and fish-shooting games through a single account, with a mobile app for iOS and Android.
ConsumerGaming
Wicue develops flexible liquid crystal (LC) film technologies, including Crystal Clear Switching (CCS) and high-brightness liquid crystal writing, for use in optical products.
Deep TechHardwareNew Materials
Zenflow develops medical devices for treating benign prostatic hyperplasia (BPH) in men, founded from the Stanford Byers Center for Biodesign with a team experienced in medical device development and FDA regulation.
HealthtechMedical DevicesSan Francisco, US
Shreya Mehta(CTO)inNick Damiano(CEO)inJohn Beck(Executive Officer)in
BoardBryan Kim(Director)Robert Weisskoff(Director)inBlayne Roeder(Director)
Co-investorsAstiaDorm RoomF-Prime CapitalShangBay Capital LLCY CombinatorAgrolimen Ventures+15 more
Other
Tracked investments with no reachable website or further public details — typically companies that wound down, renamed, or were absorbed.
CloudBrainLogic InkNovita PharmaceuticalsQuantaporeSnapCheckUgen WorldVUIZebit
Portfolio news
latest coverage across their companiesFrequently asked questions
- How many investments has CloudStone Capital made?
- CloudStone Capital has 22 tracked investments, including 1 dated in the last 24 months.
- What stage does CloudStone Capital invest at?
- CloudStone Capital invests at the Seed, Series A stages.
- What sectors does CloudStone Capital focus on?
- CloudStone Capital focuses on Advanced Manufacturing, AI & Machine Learning, Biotech, Digital Health, Fintech, Healthtech, Medical Devices, Robotics.
- Where is CloudStone Capital located?
- CloudStone Capital is headquartered in San Mateo, US.
- Who does CloudStone Capital co-invest with?
- CloudStone Capital most often shares deals with StartX, Fusion, Gaingels, among 65 tracked co-investors.
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