Investing Profile
Mark Jacobstein(230)
VCFormer CEOFounderOperator
General Partner at South Park Commons
nearhorizon.vc/experienceStanford, California
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NewCo Network
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cbCurrent Investing Position
South Park Commons General Partner
Investment Range
$500K - $1.2M
Sweet Spot
$1M
Investments On Record
8
Current Fund Size
$52.2M
Mark Jacobstein is on these Sector & Stage Rankings
Social Networks (Seed)AI (Seed)San Francisco Bay AreaSocial Networks (Pre-seed)Marketplaces (Pre-seed)AI (Pre-seed)Enterprise (Pre-seed)Marketplaces (Seed)Enterprise (Seed)Investors who were foundersInvestors who invested in diverse foundersInvestors who invested in female foundersConsumer Internet (Seed)BioTech (Seed)Diagnostics (Seed)Enterprise Applications (Seed)Diagnostics (Pre-seed)Enterprise Applications (Pre-seed)BioTech (Pre-seed)Consumer Internet (Pre-seed)Generative Tech/AI (Pre-seed)Generative Tech/AI (Seed)
Mark Jacobstein's Investments On Record (8)
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Sign in with Google →Mark Jacobstein's Experience
General Partner South Park Commons2026 - Present
Venture Builder NewCo2023 - Present
Co-Founder and President Jimini Health2023 - Present
Venture Builder Sanctum, Inc.2023 - Present
Venture Builder TVTAK2023 - Present
Venture Builder Sleuth2023 - Present
Venture Builder Sleuth Inc2023 - Present
Advisor Sleuth2023 - Present
Co-Founder and President Stealth Company (Mark Jacobstein)2023 - Present
Co-Founder and President Stealth MentalHealthCo2023 - Present
Board Member Luminopia2018 - Present
Chief User Engagement Officer Guardant Health2015 - Present
Founder and Partner (de facto co-CEO) Small World Software1994 - Present
Venture Builder Small World SoftwarePresent
Venture Builder ruby labsPresent
CEO ruby labsPresent
CEO Small World SoftwarePresent
Founder and Partner (de facto co-CEO) ruby labsPresent
Founder and Partner (de facto co-CEO) IT CRUX Mobile Apps SolutionsPresent
CEO IT CRUX Mobile Apps SolutionsPresent
Entrepeneur in Residence IT CRUX Mobile Apps SolutionsPresent
EVP Corporate Development & Marketing IT CRUX Mobile Apps SolutionsPresent
Executive Business Advisor and stay-at-home dad IT CRUX Mobile Apps SolutionsPresent
Venture Builder IT CRUX Mobile Apps SolutionsPresent
SVP iXLPresent
CEO Small World SportsPresent
VP Wireless and iTV Sporting NewsPresent
Entrepeneur in Residence Advantage CapitalPresent
Visiting Partner South Park Commons2025 - 2026
Board Member Odin2020 - 2026
Venture Builder Second2024 - 2025
Co-founder and General Partner Near Horizon2023 - 2025
Executive Business Advisor and stay-at-home dad NewCo2023 - 2023
Executive Business Advisor and stay-at-home dad Numerous2023 - 2023
Executive Business Advisor and stay-at-home dad TVTAK2023 - 2023
Executive Business Advisor at Immunai Immunai2022 - 2023
Chief Business Officer Immunai2020 - 2022
Co-Chair Working Group on Data Access Biden Cancer Initiative2019 - 2019
Board Member Full Circle Fund2011 - 2017
Chief Sabbatical Officer Currently on sabbatical2013 - 2015
Chief Sabbatical Officer No longer on Sabbatical2013 - 2015
VP Product Management Qualcomm 2010 - 2013
VP Product Management Qualcomm2010 - 2013
CEO Qualcomm2007 - 2010
CEO iSkoot2007 - 2010
Entrepreneur in Residence CRV2007 - 2007
Entrepreneur in Residence Charles River Ventures2007 - 2007
EVP Corporate Development & Marketing NewCo2006 - 2007
EVP Corporate Development & Marketing TVTAK2006 - 2007
EVP Corporate Development & Marketing loopt, Inc.2006 - 2007
President of Publishing, co-Founder Digital Chocolate2003 - 2005
Entrepeneur in Residence NewCo2003 - 2003
Entrepeneur in Residence TVTAK2003 - 2003
VP Wireless and iTV PERFORM2001 - 2002
CEO NewCo1994 - 2002
CEO TVTAK1994 - 2002
SVP SapientRazorfish1998 - 2000
Founder and Partner (de facto co-CEO) NewCo1994 - 1998
Founder and Partner (de facto co-CEO) TVTAK1994 - 1998
Mark Jacobstein's Education
Harvard University B.A. Computer Science with Cognitive Science
Harvard University B.A. Computer Science with Cognitive Science, cum laude General Studies
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