5 Founders Backed by Jeff Barnes (2026)

Jeff Barnes founders (5)

Jeff Barnes founders covers 5 founders on American Efficient, HandyLab and Sensicore and 2 other companies. The most common sectors are Climate (2), Biotech (1) and Fintech (1). Members are based in 4 cities, led by Ann Arbor, MI (2), Durham, NC (1) and Houston, TX (1). Companies represented include Spruce Power and T-REX. Every founder below links to a profile with their company, backers, and the filings behind each round.

• Founders listed: 5
• Companies represented: 5
• Top sector: Climate (2 founders)
• Top location: Ann Arbor, MI (2 founders)
• Sectors represented: 3
• Locations represented: 4

• Chris Hayes — Spruce Power
• Larry Culp — Sensicore
• Leo Efstathiou — T-REX
• Lucas Fishback — American Efficient
• Tom Polen — HandyLab

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