Ernst Sack
Partner at Blue Bear Capital
Jackson, Wyoming
Ernst Sack, Partner at Blue Bear Capital is an active investor based in Jackson, Wyoming. This profile covers what Ernst Sack backs, at which stage, and how founders can reach out in 2026.
- Investor type
- VCPE
- Stages
- SeedSeries ASeries BLate Stage Venture
- Invests in
- Climate & EnergyCybersecurityIoT & Connected DevicesManufacturing & IndustrialRobotics & Automation
- Location
- Jackson, Wyoming
- Typical check
- $2M
- Past investments
- 27
Notable investments
Voyager PortalAvalo, Inc
FreeWire Technologies
ShorelineMission SecureCopper LabsPani EnergyVoyager
EveractiveMineralSoftNuclearnThe Demex GroupHow to reach Ernst Sack
Angels and operators like Ernst Sack reply to specific, personalized notes that show real traction, not mass blasts. Build a verified list, write a note that fits their thesis, and track replies, all on Round Funded.
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About this profile
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Cite this page
Round Funded. "Ernst Sack." Round Funded investor database, updated September 9, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/ernst-theodor-sack
Frequently Asked Questions
What does Ernst Sack invest in?
Ernst Sack invests in Climate & Energy, Cybersecurity, IoT & Connected Devices and Manufacturing & Industrial, typically at Seed, Series A, Series B and Late Stage Venture. Match your sector and stage, then reach out with a personalized pitch.
What stage does Ernst Sack invest at?
Ernst Sack typically invests at Seed, Series A, Series B and Late Stage Venture. Lead with traction that fits the stage when you reach out.
What is Ernst Sack's typical check size?
Ernst Sack typically writes checks around $2M. Use it as a signal for whether your raise fits their stage.
How do founders reach investors like this?
Round Funded lists active investors with verified, professional contact details for signed-up founders. Filter by sector, stage and location, then send a personalized pitch from your own inbox.
What is Round Funded?
Round Funded is an investor database and outreach platform for startup founders. It lists 60,000+ active investors with verified contacts, filtered to recent investment activity, and lets founders send personalized pitches from their own Gmail, track replies, and share a free Data Room. Round+ starts at $99 per month with a 3-day trial.