Investor profile
John M. Jack
Venture capital & CEO Partner at Harmonic Growth Partners, Board Partner at Andreessen Horowitz, Venture Partner at Shield Capital
John M. Jack is a Board Partner at Andreessen Horowitz, whose known portfolio counts 29 companies.
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Investment focus
- Focus
- AI ApplicationsAPIAerospaceAnalyticsBiotechCloud InfrastructureComputer VisionConstruction TechCreator EconomyCreditCryptoCybersecurityDataDevOpsDeveloper ToolsDronesEnterprise SaaSGeospatialInformation ServicesLLMMachine LearningNational SecurityNatural Language Processing (NLP)Nuclear EnergyPersonal HealthPhotographyQuantum ComputingRoboticsSecuritySpaceTechWellness
Contacts
Affiliated funds' portfolios
CEO Partner at Harmonic Growth Partners, whose known portfolio counts 9 companies
- RapidSOS
- ArmorCode
- Nova Credit
- AssetWatch
- Electric
- 1Mind
- Harness
- Caribou
- Overjet
Board Partner at Andreessen Horowitz, whose known portfolio counts 29 companies
- Flora
- Kalshi
- pillar
- Promise
- SuperGaming
- Voyage
- Sage Haven
- Axis
- Nexxa.ai
- Hex Technologies
- Prepared
- Hedra
- and 17 more
Venture Partner at Shield Capital, whose known portfolio counts 7 companies
- Starfish Space
- Chariot Defense
- Code Metal
- Seifert Dynamics
- Seasats
- UFORCE
- TENEX.AI
Investor Profile
The listing covers sectors AI, FinTech, Hardware and Healthcare, and focus areas AI Applications, API, Aerospace and Analytics. Startups operating in these areas may find John M. Jack relevant.
Stage-wise, the deals at Andreessen Horowitz cluster around Growth, Pre-Seed and Seed rounds.
What the affiliated firm has backed is the closest available signal on whether John M. Jack is worth approaching.
Colleagues
Showing 20 of 159
Andrew Chen
General Partner
San Francisco, United States
Adrian Fenty
Special Advisor
Washington, United States
Joe Schmidt IV
Partner
San Francisco, United States
Daniel C. Liem
Scout
San Francisco, United States
Martin Casado
General Partner
San Francisco, United States
Zane Lackey
General Partner
New York, United States
David Ulevitch
General Partner
New York, United States
Steven Sinofsky
Board Partner
Sioux Falls, United States
Daouda Leonard
Scout
Los Angeles, United States
Erik Torenberg
General Partner
San Francisco, United States
Jonathan Lai
General Partner
Menlo Park, United States
Fareed Mosavat
Visiting Partner, a16z speedrun
Berkeley, United States
Jeff Jordan
General Partner
San Francisco, United States
Ali Yahya
General Partner
New York, United States
Jillian Manus
Venture Partner
San Francisco, United States
Marc Petit
Scout Investor
Montreal, Canada
Angela Strange
General Partner
San Francisco, United States
Margit Wennmachers
Operating Partner
Jackson, United States
Rubén Domínguez Ibar
Scout
United States
Alexey Moiseenkov
Scout
Palo Alto, United States
Frequently asked questions
Who is John M. Jack?
John M. Jack is a venture capital investor based in San Francisco, California, United States, listed as Board Partner at Andreessen Horowitz. The known portfolio of that firm counts 29 companies. That portfolio belongs to the firm, not to John M. Jack personally.
What does John M. Jack invest in?
Listed sectors include AI, FinTech, Hardware and Healthcare; listed focus areas include AI Applications, API, Aerospace and Analytics. Those tags come from the portfolios of the firms this profile is attached to, so they read as a record of what has been backed rather than a stated preference for what comes next.
What stage does John M. Jack invest at?
Andreessen Horowitz appears in Growth, Pre-Seed and Seed rounds across its known deals, and John M. Jack is listed there as Board Partner. Stage is the strongest single filter when you build a target list: an investor with no record at your stage rarely starts with you.
Which firm is John M. Jack listed at?
John M. Jack is listed as Board Partner at Andreessen Horowitz. 159 other people in the database share a firm with John M. Jack.
How do I contact John M. Jack?
An email address, a phone number and a LinkedIn page are on file for John M. Jack. The address stays masked on this page and is readable inside RaiseHunt after you create an account.
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Data: RaiseHunt investor dataset · Snapshot 5 September 2026 · How this data is built · Report a correction or request removal