Sebastian Heitmann co-founded Extantia Capital after building and exiting multiple companies himself, positioning the firm as by entrepreneurs for entrepreneurs rather than following the traditional finance or consulting path to venture capital. He focuses specifically on deep decarbonization infrastructure like geothermal and industrial process heat, and advocates publicly for European tech sovereignty in climate technologies—arguing that Europe needs to control core green technologies rather than just deploy them.
About their Fund
Sectors
Climate, Energy, Deeptech / Hardware, Materials, SaaS
Rounds
Seed - Series A
Avg Check Size
€1M–5M
Notable Investments
Extantia Capital runs a dual-strategy ecosystem builder model where their Flagship fund invests directly in early-stage climate tech startups while their Allstars fund backs other climate-focused venture funds, giving them visibility across more than 160+ companies. They use an internal EPIC methodology with a dedicated Head of Carbon Math to estimate each startup's potential carbon savings by 2050 and set quantitative impact targets, focusing on backing technologies that create green discounts rather than green premiums.
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
Avg. Check
Links
Deeptech / Hardware
Robotics
Biotech
+
12
View more in profile...
Unknown
Pre-Seed - Seed
Unknown
$400K - $2M
Unknown
Defense
Deeptech / Hardware
Energy
+
7
View more in profile...
Unknown
Pre-Seed - Series A
Unknown
$100K - $5M
Unknown
Defense
Deeptech / Hardware
Energy
+
7
View more in profile...
Unknown
Pre-Seed - Series A
Unknown
$100K - $5M
Unknown
Biotech
Health
Deeptech / Hardware
+
2
View more in profile...
Unknown
Pre-Seed - Seed
Unknown
$250K - $2M
Unknown
Climate
Deeptech / Hardware
Materials
+
4
View more in profile...
Unknown
Pre-Seed - Seed
Unknown
$400K - $1.5M
Unknown
Deeptech / Hardware
Robotics
Biotech
+
7
View more in profile...
Unknown
Pre-Seed - Seed
Unknown
$400K - $2M
Unknown
Deeptech / Hardware
Robotics
Biotech
+
2
View more in profile...
Unknown
Pre-Seed - Seed
Unknown
~$750K
Unknown
Fintech
Deeptech / Hardware
Devtools
+
2
View more in profile...
Unknown
Pre-Seed - Series A
Unknown
$250K-$1M
Unknown
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