Ben Stein spent years in hands-on operating roles at companies like Square and Opendoor before becoming an investor, and he was personally angel investing as early as 2017, including an early bet on Teamshares before it went public. He focuses on physical infrastructure, deep tech, and global supply chains rather than typical software startups, and he lives in Oakland while investing in the San Francisco area.
About their Fund
Sectors
AI, Biotech, Materials, Deeptech / Hardware, Energy
Rounds
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Notable Investments
Cartography Capital invests in the raw materials and infrastructure that underlie technologies like AI chips, quantum computers, robots, batteries, solar panels, biotech, and space tools, backing companies in areas such as carbon-capture-to-graphite biotech, electric hydrofoils, AI-driven materials discovery, and mineral exploration rather than typical software startups. Run by an operator-heavy team with a track record of helping drive over $550 million in VC funding, the fund follows a quiet, low-profile approach aimed at select investors who are comfortable taking on this kind of risk alongside the partners.
Other partners at the fund
Notable Fund
Investments
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Sheets they're in
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Sheets they're Fund is in
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Popular Investors
investor name
Active in
Rounds
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Links
Deeptech / Hardware
Robotics
Biotech
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12
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Unknown
Pre-Seed - Seed
Unknown
$400K - $2M
Unknown
Defense
Deeptech / Hardware
Energy
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7
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Unknown
Pre-Seed - Series A
Unknown
$100K - $5M
Unknown
Defense
Deeptech / Hardware
Energy
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7
View more in profile...
Unknown
Pre-Seed - Series A
Unknown
$100K - $5M
Unknown
Biotech
Health
Deeptech / Hardware
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2
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Unknown
Pre-Seed - Seed
Unknown
$250K - $2M
Unknown
Climate
Deeptech / Hardware
Materials
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4
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Unknown
Pre-Seed - Seed
Unknown
$400K - $1.5M
Unknown
Deeptech / Hardware
Robotics
Biotech
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7
View more in profile...
Unknown
Pre-Seed - Seed
Unknown
$400K - $2M
Unknown
Deeptech / Hardware
Robotics
Biotech
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2
View more in profile...
Unknown
Pre-Seed - Seed
Unknown
~$750K
Unknown
Fintech
Deeptech / Hardware
Devtools
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2
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Unknown
Pre-Seed - Series A
Unknown
$250K-$1M
Unknown
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