Home
Loading

aVenture is in Alpha: During this preview period, you should expect the research data to be limited and may not yet meet our exacting standards. We've made the decision to provide early access to our data to showcase the product as we build, but you should not yet rely upon it alone for your investment decisions.

aVenture is in Alpha: During this preview period, you should expect the research data to be limited and may not yet meet our exacting standards. We've made the decision to provide early access to our data to showcase the product as we build, but you should not yet rely upon it alone for your investment decisions.

Get in touch

  • Contact

  • Request a demo

  • Request data updates

  • Add a company

Research

  • Companies

  • Investors

  • People

aVenture

  • Sitemap

  • Feature requests

Member

Backed by

© aVenture Investment Company, 2026. All rights reserved.

San Francisco, CA, USA

Privacy Policy

aVenture Investment Company ("aVenture") is an independent research platform providing detailed analysis and data on startups, venture capital investments, and key industry individuals. It is not a registered investment adviser, broker-dealer, or investment advisor and does not provide investment advice or recommendations. The data provided by aVenture does not constitute recommendations or advice, whether by methodology, analysis, AI-generated content, or a statement written by a staff member of aVenture.

aVenture is not affiliated with any of the people, companies, organizations, government agencies, regulatory bodies, or investment funds we provide coverage for on this site unless explicitly stated otherwise. Users assume full responsibility for decisions made based on information obtained from this platform. Links to external websites do not imply endorsement or affiliation with aVenture. Any links that provide the ability to invest in a primary or secondary transaction in a company are for convenience only and do not constitute solicitations or offers to buy or sell an investment. Investors should exercise heightened precaution and due diligence when investing in private companies, especially those not independently audited.

While we strive to provide valuable insights with objectivity and professional diligence, we cannot guarantee the accuracy of the information provided on our platform. Before making any investment decisions, you should verify the accuracy of all pertinent details for your decision. To the fullest extent permitted by law, aVenture shall not be liable for any direct, indirect, incidental, consequential, or financial damages arising from use of this site, whether by consumers of its contents directly or by persons or organizations covered by our research, even if we are advised of the possibility. Our best-efforts processes and correction request forms do not create a warranty or duty of care.

Profiles on this platform may include content generated in part by large language models (LLMs, artificial intelligence) that aggregate publicly available sources (e.g., SEC EDGAR, public filings, press releases). Source attribution is provided where known; always verify statements and claims here against original sources before relying on any data. Content on our site may contain inaccuracies, omissions, or what are commonly called 'hallucinations' if generated in part or in full by AI / LLMs. The risk can also exist even when content is written by a human, as internal and third-party sources may also have inaccuracies for the same or different reasons. While we randomly audit a proportion of content, this is not exhaustive.

We recommend that an independent auditor be hired to verify the accuracy of the information before relying on it for any sensitive decisions. By accessing this platform, you agree not to rely solely on any information generated by AI, aggregated, or sourced or written otherwise on this site, for investment, financial, or other decisions. aVenture assumes no responsibility for inaccuracies, omissions, or hallucinations. You must independently verify all data from primary sources. Use of this platform constitutes your waiver of claims for reliance-based damages, including negligent misrepresentation. To report an error, request a correction, or dispute information about a company or individual, contact us via our request data updates form.

Loading homepage
Loading
Loading
Home›
Research›
People›
John Stewart
AddedMar 31, 2024
UpdatedJun 28, 2026
John Stewart

John Stewart

Board Member, SightGain

CrunchbaseLinkedIn

John Stewart's Career

SightGain
SightGain

Mason, OH, US

Board Member· Board
Quantum Xchange
Quantum Xchange

Bethesda, MD, US

Board Member· Board
SpyCloud
SpyCloud

Austin, TX, US

Board Member· Board
Blackpoint Cyber
Blackpoint Cyber

Ilchester, MD, US

Board Member· Board

Create your profile now and gain access to exclusive deals and high-potential startups.

aVenture product preview
aVenture product preview
aVenture product preview

John Stewart's Career

SightGain
SightGain
Seed$1.8M342016Mason, OH, US
Board Member· Board

Leadership at SightGain

Christian SorensenChristian SorensenFounder
Tony SurakTony SurakBoard Member
Quantum Xchange
Quantum Xchange
Series A$23.5M172018Bethesda, MD, US
Board Member· Board

Leadership at Quantum Xchange

Hal ChapelHal ChapelBoard Member
Eddy ZervigonEddy ZervigonBoard Member

Similar to Quantum Xchange

QuSecureQuSecureSan Mateo, CA, USQuantum Securityest. 2019QuSecureSan Mateo, CA, US · est. 2019

QuSecure: Providing quantum-safe security solutions to protect enterprise and government data.

Series A · $11.6M81
QunnectQunnectNew York City, NY, USQuantum Devicesest. 2017QunnectNew York City, NY, US · est. 2017

NYC-based Qunnect engineers quantum devices for future information networks and quantum computing.

Series A · $12.5M20
PqsecurePqsecureBoca Raton, FL, USSecurity Softwareest. 2017PqsecureBoca Raton, FL, US · est. 2017

PQSecure: Specializing in quantum-safe cryptographic security solutions.

Pre-Seed · $1.2M9
SpyCloud
SpyCloud
Series D$168.5M2222016Austin, TX, US
Board Member· Board

Leadership at SpyCloud

Eric ByunnEric ByunnBoard Member
Vizay KotikalapudiVizay KotikalapudiBoard Member
Alan KesslerAlan KesslerBoard Member
David EndlerDavid EndlerCo-Founder
Ted RossTed RossCo-Founder
Alen PuzicAlen PuzicCo-Founder
Blackpoint Cyber
Blackpoint Cyber
Series C$207.4M1842014Ilchester, MD, US
Board Member· Board

Leadership at Blackpoint Cyber

Jon MurchisonJon MurchisonFounder & CEO
Mike YangMike YangChief Financial Officer
Xavier SalinasXavier SalinasChief Technology Officer
Jon MurchisonJon MurchisonBoard Member
Tom Donohue Jr.Tom Donohue Jr.Board Member
Frank FitzsimmonsFrank FitzsimmonsBoard Member

John Stewart's Co-Investors

Vivek SoderaVivek SoderaCo-invested · BalkanID SeedPat CondonPat CondonCo-invested · BalkanID SeedEly KahnEly KahnCo-invested · BalkanID SeedClark GolestaniClark GolestaniCo-invested · BalkanID SeedRishi BhargavaRishi BhargavaCo-invested · BalkanID Seed

John Stewart's Similar Executives & Operators

Lau Eng BoonLau Eng BoonBoard Member · BukalapakJay Geoffrey WacherJay Geoffrey WacherBoard Member · BukalapakSoemantri BrodjonegoroSoemantri BrodjonegoroBoard Member · BukalapakWILL WEI CHENGWILL WEI CHENGBoard Member · DiDiDhirubhai H. AmbaniDhirubhai H. AmbaniBoard Member · Reliance RetailMason YeoMason YeoBoard Member · KakaoJaeHong ChoiJaeHong ChoiBoard Member · KakaoSean JohSean JohBoard Member · Kakao

People Similar to John Stewart

David NussbaumDavid NussbaumBoard Member · EarlyBirdCapitalStephen GillettStephen GillettBoard Member · DiscordJeremiah GrossmanJeremiah GrossmanBoard Member · BugcrowdJC GlancyJC GlancyBoard Member · ZenBusinessBrian MartinezBrian MartinezCo-Founder & CEO · Demo LessonJohn FerberJohn FerberBoard Member · Videology