LiquidPiston

Bloomfield, CT · Founded 2003 · Privately Held (backing)

Manufacturer of advanced rotary internal combustion engines intended for unmanned aerial vehicles and the automotive industry. LiquidPiston is based in Bloomfield, CT and was founded in 2003. Its last reported valuation was $69.1 million in Jun 2021. It has raised $74.4 million across 7 recorded rounds; the latest was a $500,009 seed round in Mar 2026.

Last reported valuation
$69.1M
Oct 2026
Priced at
—
Total raised
$74.4M
Last round
Seed Round
Mar 2026

Who backs LiquidPiston?

20 investors
InvestorType
United States Department of War—
Pritzker Group Venture CapitalVenture capital
Sternhill Associates—
Northwater Capital ManagementHedge fund
Adams Capital Management—
Cody Heisinger—
Colle Capital Partners—
Defense Advanced Research Projects Agency—
Erik Peterson—
Gowtham Kethineedi—
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LiquidPiston investors

20 investors are on record for LiquidPiston, including United States Department of War, Pritzker Group Venture Capital, Sternhill Associates and Northwater Capital Management. The seed round in Mar 2026 drew 1 investor.

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