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
How much has LiquidPiston raised?
$74.4Macross 7 recorded rounds · Feb 2015 – Mar 2026

Most recently, LiquidPiston raised $500K in its Seed Round (Mar 2026).

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LiquidPiston round by round

7 rounds
Mar 2026Seed Round$500KSEC filing▮
1 investors participated
Mar 2019Debt$250KSEC filing▮
1 investors participated
Jul 2017Debt$299KSEC filing▮
43 investors participated
Mar 2016Debt$1.2MSEC filing▮
10 investors participated
Feb 2016Debt$251KSEC filing▮
10 investors participated
Feb 2015Seed Round$1.1MSEC filing▮
1 investors participated
+ 1 earlier rounds · a free account shows the full history

How much has LiquidPiston raised?

LiquidPiston has raised $74.4 million in total; 7 of its rounds are on record, from 2013 on. The largest on record was a $500,009 seed round in Mar 2026.

LiquidPiston has filed 16 Form Ds with the SEC since 2011, most recently in Nov 2024 ($25,010 sold to 1 investor).

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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20 investors have backed LiquidPiston.

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Frequently asked about LiquidPiston

How much has LiquidPiston raised?
LiquidPiston has raised $74.4M in total across 7 recorded funding rounds.
When was LiquidPiston's last funding round?
LiquidPiston's most recent recorded round was Seed Round in Mar 2026, raising $500K.