Mark Jacobstein
Mark Jacobstein is a General Partner at South Park Commons based in San Francisco. He has founded several companies and led business growth at Guardant Health and Immunai.
What Mark can write
South Park Commons writes $1M to $10M checks, larger than 83% of firms in the atlas.
Bars: how many firms report each check band. Highlighted: South Park Commons.Career
- loopt · co-led
- iSkoot · led
- Guardant Health · led business growth
- Immunai · led business growth
- Jimini Health · co-founder
- Near Horizon · co-founder
- South Park Commons · Visiting PartnerNow
- South Park Commons · General PartnerNow
Companies founded
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Also at South Park Commons
Partners like Mark
At firms with a similar stage, sector and check size.
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One email when Mark's firm raises a fund, adds a partner or shows new activity.
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Raising a pre-seed or seed round? We write $1M to $5M first checks and help founders with distribution. A partner reads every deck.
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Who is Mark Jacobstein?
Mark Jacobstein is a General Partner at South Park Commons based in San Francisco. He has founded several companies and led business growth at Guardant Health and Immunai.
How much does Mark Jacobstein invest?
Mark Jacobstein invests through South Park Commons, which writes checks of $1M to $10M at pre-seed, seed.
How do I pitch Mark Jacobstein?
A warm intro from a founder South Park Commons backed works best.
What did Mark Jacobstein do before South Park Commons?
co-led at loopt; led at iSkoot; led business growth at Guardant Health; led business growth at Immunai; co-founder at Jimini Health; co-founder at Near Horizon.
Last updated 2026-10-15. Is this you? Ask for a correction.