# Sunamp funding: rounds and investors > Sunamp has raised $8.1M across 4 rounds since 2015. Investors include Par Equity, Equity Gap and Highland Capital Partners. Every round with its source. Source: https://millionrounds.com/company/sunamp (Millionrounds; every figure on the page links to its filing or article) United States · [Series A startup](https://millionrounds.com/companies) # Who invested in *Sunamp* 4 rounds we have observed, with the 6 investors named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it. Energy Funding summary Updated 26 Oct 2026 **$8.1M** raised across 4 rounds since 2015, from 4 sources **$2.0M** Series B **$2.8M** Seed **$610K** Series A **$2.7M** Series A - **Latest round:** Series A, $2.7M Apr 2024 - **Biggest round:** $2.8M Seed · Nov 2018 - **Step-up i:** 4.5× - **Investors:** 6 See who backed them ## The funding story Each circle is a round, placed by date and sized by amount. The line above is the running total. 2015 2017 2019 2021 2023 **$2.0M** Series B **$2.8M** Seed **$610K** Series A **$2.7M** Series A - **First round:** Series B, $2.0M - **Biggest round:** $2.8M - **Usual gap between rounds:** 3 years ## The rounds - **Apr 2024** Series A **$2.7M** No investor was named in the report. Shares issued, filed with Companies House (SH01); no report of this raise yet - **Apr 2021** Series A **$610K** No investor was named in the report. Shares issued, filed with Companies House (SH01); no report of this raise yet - **Nov 2018** Seed **$2.8M** *1 new* *2 returning* [Par Equity](https://millionrounds.com/fund/par-equity) [Equity Gap](https://millionrounds.com/fund/equity-gap) Osaka Gas Reported by Angelnews - **Jul 2015** Series B **$2.0M** *5 new* [Highland Capital Partners](https://millionrounds.com/fund/highland-capital-partners) [Par Equity](https://millionrounds.com/fund/par-equity) [Old College Capital Lp](https://millionrounds.com/fund/old-college-capital) [Scottish Investment Bank](https://millionrounds.com/fund/scottish-investment-bank) [Equity Gap](https://millionrounds.com/fund/equity-gap) From a historical funding record ## Funding filed with regulators Sunamp filed 2 raises, $3.3M in all. Filings say how much was sold and to how many investors; they never name the investors. - Apr 2024 **$2.7M** UK share allotment - Apr 2021 **$610K** UK share allotment ## Who was in which round The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led. **Series B** 2015 **Seed** 2018 **Series A** 2021 **Series A** 2024 [Par Equity](https://millionrounds.com/fund/par-equity) [Equity Gap](https://millionrounds.com/fund/equity-gap) [Highland Capital Partners](https://millionrounds.com/fund/highland-capital-partners) [Old College Capital Lp](https://millionrounds.com/fund/old-college-capital) [Scottish Investment Bank](https://millionrounds.com/fund/scottish-investment-bank) Osaka Gas ## Everyone who backed them [Par Equity](https://millionrounds.com/fund/par-equity) VC firm **2** rounds [Equity Gap](https://millionrounds.com/fund/equity-gap) Angel network **2** rounds [Highland Capital Partners](https://millionrounds.com/fund/highland-capital-partners) VC firm **1** round [Old College Capital Lp](https://millionrounds.com/fund/old-college-capital) VC firm **1** round [Scottish Investment Bank](https://millionrounds.com/fund/scottish-investment-bank) Investment firm **1** round Osaka Gas no record of our own yet **1** round Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=sunamp). ## Also claim to have backed them This firm lists Sunamp as a portfolio company on their own website, but no report of a round names it. They are the firms' own claims, kept apart from the rounds above. [Highland Venture Capital](https://millionrounds.com/fund/highland-venture-capital) Angel network Per its own site ## Quick answers about Sunamp ### Who invested in Sunamp? Sunamp's investors include Par Equity, Equity Gap, Highland Capital Partners, Old College Capital Lp and Scottish Investment Bank, and 1 more on record. ### How much has Sunamp raised? Sunamp has raised $8.1M across 4 rounds since 2015. ### When did Sunamp last raise? Sunamp's most recent round was a Series A of $2.7M in Apr 2024. ### What was Sunamp's biggest round? Sunamp's largest round on record is $2.8M (Seed), in Nov 2018. ### Who backed Sunamp first? Sunamp's first round on record, in Jul 2015, was backed by Highland Capital Partners, Par Equity and Old College Capital Lp and 2 others. ### What stage is Sunamp at? Sunamp's latest named round is a Series A, in Apr 2024. ### Where is Sunamp based? Sunamp is based in the United States. ## Companies like Sunamp In the same sector, and raised in the last eighteen months. [**Amogy** $125M · Oct 2026](https://millionrounds.com/company/amogy)[**LanzaJet** $67M · Oct 2026](https://millionrounds.com/company/lanzajet)[**Pivot Energy** $500M · Oct 2026](https://millionrounds.com/company/pivot-energy)[**Peak Energy** $163M · Oct 2026](https://millionrounds.com/company/peak-energy)[**Pennsylvania American Water** $43M · Oct 2026](https://millionrounds.com/company/pennsylvania-american-water)[**Vertical Semiconductor** $84M · Oct 2026](https://millionrounds.com/company/vertical-semiconductor) ## Find investors like these Search every investor by what they have actually funded, then narrow to your stage and market. Free. Open the investor searchOr these rounds in the app