# IsoPlexis funding: rounds and investors > IsoPlexis has raised $41M across 5 rounds since 2014. Investors include Connecticut Innovations, Spring Mountain Capital and Ironwood Capital Partners. Source: https://millionrounds.com/company/isoplexis (Millionrounds; every figure on the page links to its filing or article) United States · [Series C startup](https://millionrounds.com/companies) # Who invested in *IsoPlexis* 5 rounds we have observed, with the 7 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. Biotech Healthcare Funding summary Updated 26 Oct 2026 **$41M** raised across 5 rounds since 2014, from 5 sources **$100K** Seed **$300K** Series A **$2.4M** Venture **$14M** Series B **$25M** Series C - **Latest round:** Series C, $25M May 2019 - **Led by:** Northpond Ventures - **Step-up i:** 1.9× - **Investors:** 7 (1 led) 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 2016 2017 2018 2019 **$100K** Seed **$300K** Series A **$2.4M** Venture **$14M** Series B **$25M** Series C - **First round:** Seed, $100K - **Biggest round:** $25M - **Usual gap between rounds:** 20 months ## The rounds - **May 2019** Series C **$25M** *1 new* *4 returning* [Northpond Ventures](https://millionrounds.com/fund/northpond-ventures) Lead [Connecticut Innovations](https://millionrounds.com/fund/connecticut-innovations) [Spring Mountain Capital](https://millionrounds.com/fund/spring-mountain-capital) [Ironwood Capital Partners](https://millionrounds.com/fund/ironwood-capital-partners) [North Sound](https://millionrounds.com/fund/north-sound) Reported by FinSMEs - **Sept 2017** Series B **$14M** *3 new* [Ironwood Capital Partners](https://millionrounds.com/fund/ironwood-capital-partners) [North Sound](https://millionrounds.com/fund/north-sound) Spring Mountain Capital/ Connecticut Innovations Reported by FinSMEs SEC filing: $5.4M sold, first sale Jul 2017 - **May 2015** Venture **$2.4M** No investor was named in the report. From a historical funding record SEC filing: $2.4M sold, first sale May 2015 - **Aug 2014** Series A **$300K** *1 new* *1 returning* [Connecticut Innovations](https://millionrounds.com/fund/connecticut-innovations) [Spring Mountain Capital](https://millionrounds.com/fund/spring-mountain-capital) From a historical funding record SEC filing: $1.3M sold, first sale Jul 2014 - **Jun 2014** Seed **$100K** *2 new* [Connecticut Innovations](https://millionrounds.com/fund/connecticut-innovations) [YEI Innovation Fund](https://millionrounds.com/fund/yei-innovation-fund) From a historical funding record SEC filing: $1.3M sold, first sale Jul 2014 ## Founders and team From the SEC filings it signed: 2 on the team. - **John Strahley** Executive Officer i - **Sean Mackay** Executive Officer, Director i On the board, as filed i *Daniel Wagner* *Gregory Ho* *James Heath* *John Conley* *Michael Egholm* *Sharon Kedar* ## 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. **Seed** 2014 **Series A** 2014 **Venture** 2015 **Series B** 2017 **Series C** 2019 [Connecticut Innovations](https://millionrounds.com/fund/connecticut-innovations) [Spring Mountain Capital](https://millionrounds.com/fund/spring-mountain-capital) [Ironwood Capital Partners](https://millionrounds.com/fund/ironwood-capital-partners) [North Sound](https://millionrounds.com/fund/north-sound) [Northpond Ventures](https://millionrounds.com/fund/northpond-ventures) L [YEI Innovation Fund](https://millionrounds.com/fund/yei-innovation-fund) Spring Mountain Capital/ Connecticut Innovations ## Everyone who backed them [Connecticut Innovations](https://millionrounds.com/fund/connecticut-innovations) Government **3** rounds [Spring Mountain Capital](https://millionrounds.com/fund/spring-mountain-capital) Private equity **2** rounds [Ironwood Capital Partners](https://millionrounds.com/fund/ironwood-capital-partners) Private equity **2** rounds [North Sound](https://millionrounds.com/fund/north-sound) Growth equity **2** rounds [Northpond Ventures](https://millionrounds.com/fund/northpond-ventures) Private equity **1** round, led 1 [YEI Innovation Fund](https://millionrounds.com/fund/yei-innovation-fund) VC firm **1** round Spring Mountain Capital/ Connecticut Innovations 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=isoplexis). ## Quick answers about IsoPlexis ### Who invested in IsoPlexis? IsoPlexis's investors include Connecticut Innovations, Spring Mountain Capital, Ironwood Capital Partners, North Sound and Northpond Ventures, and 2 more on record. Northpond Ventures led its latest round. ### How much has IsoPlexis raised? IsoPlexis has raised $41M across 5 rounds since 2014. ### When did IsoPlexis last raise? IsoPlexis's most recent round was a Series C of $25M in May 2019, led by Northpond Ventures. ### What was IsoPlexis's biggest round? Its most recent round, $25M in May 2019, is also its largest on record. ### Who backed IsoPlexis first? IsoPlexis's first round on record, in Jun 2014, was backed by Connecticut Innovations and YEI Innovation Fund. ### What stage is IsoPlexis at? IsoPlexis's latest named round is a Series C, in May 2019. ### Where is IsoPlexis based? IsoPlexis is based in the United States. ### Who led IsoPlexis's rounds? Northpond Ventures led the Series C in 2019. ## Companies like IsoPlexis In the same sector, and raised in the last eighteen months. [**Star Therapeutics** $325M · Oct 2026](https://millionrounds.com/company/star-therapeutics)[**Promaxo** $106M · Oct 2026](https://millionrounds.com/company/promaxo)[**Prolific Machines** $105M · Oct 2026](https://millionrounds.com/company/prolific-machines)[**AI** $18M · Oct 2026](https://millionrounds.com/company/ai)[**Baba** $40M · Oct 2026](https://millionrounds.com/company/baba)[**IMIO** $19M · Oct 2026](https://millionrounds.com/company/imio) ## 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