# Reaction Engines funding: rounds and investors > Reaction Engines has raised $93M across 5 rounds since 2018. Investors include Baillie Gifford, Boeing HorizonX and Rolls-Royce. Every round with its source. Source: https://millionrounds.com/company/reaction-engines (Millionrounds; every figure on the page links to its filing or article) United Kingdom · [Funded startup](https://millionrounds.com/companies) # Who invested in *Reaction Engines* 5 rounds we have observed, with the 5 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. Aerospace & Space Funding summary Updated 26 Oct 2026 **$93M** raised across 5 rounds since 2018, from 5 sources **$38M** Round **$5.4M** Round **$45M** Round **$4.8M** Round **$148K** Round - **Latest round:** Round, $148K May 2023 - **Biggest round:** $45M Round · Sept 2022 - **Investors:** 5 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. 2018 2019 2020 2021 2022 2023 **$38M** Round **$5.4M** Round **$45M** Round **$4.8M** Round **$148K** Round - **First round:** Round, $38M - **Biggest round:** $45M - **Usual gap between rounds:** 9 months ## The rounds - **May 2023** Round **$148K** No investor was named in the report. Shares issued, filed with Companies House (SH01); no report of this raise yet - **Feb 2023** Round **$4.8M** No investor was named in the report. Shares issued, filed with Companies House (SH01); no report of this raise yet - **Sept 2022** Round **$45M** No investor was named in the report. Shares issued, filed with Companies House (SH01); no report of this raise yet - **Dec 2021** Round **$5.4M** No investor was named in the report. Shares issued, filed with Companies House (SH01); no report of this raise yet - **Apr 2018** Round **$38M** *5 new* [Baillie Gifford](https://millionrounds.com/fund/baillie-gifford) [Boeing HorizonX](https://millionrounds.com/fund/boeing-horizonx) [Rolls-Royce](https://millionrounds.com/fund/rolls-royce) BAE Systems Woodford Reported by FinSMEs ## Funding filed with regulators Reaction Engines filed 6 raises, $56M in all. Filings say how much was sold and to how many investors; they never name the investors. - May 2023 **$148K** UK share allotment - Feb 2023 **$4.8M** UK share allotment - Nov 2022 **$1.4M** UK share allotment - Oct 2022 **$4.1M** UK share allotment - Sept 2022 **$40M** UK share allotment - Dec 2021 **$5.4M** 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. **Round** 2018 **Round** 2021 **Round** 2022 **Round** 2023 **Round** 2023 [Baillie Gifford](https://millionrounds.com/fund/baillie-gifford) [Boeing HorizonX](https://millionrounds.com/fund/boeing-horizonx) [Rolls-Royce](https://millionrounds.com/fund/rolls-royce) BAE Systems Woodford ## Everyone who backed them [Baillie Gifford](https://millionrounds.com/fund/baillie-gifford) Asset manager **1** round [Boeing HorizonX](https://millionrounds.com/fund/boeing-horizonx) Investment firm **1** round [Rolls-Royce](https://millionrounds.com/fund/rolls-royce) Corporate VC **1** round BAE Systems no record of our own yet **1** round Woodford 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=reaction-engines). ## Quick answers about Reaction Engines ### Who invested in Reaction Engines? Reaction Engines's investors include Baillie Gifford, Boeing HorizonX, Rolls-Royce, BAE Systems and Woodford. ### How much has Reaction Engines raised? Reaction Engines has raised $93M across 5 rounds since 2018. ### When did Reaction Engines last raise? Reaction Engines's most recent round, $148K, was in May 2023. ### What was Reaction Engines's biggest round? Reaction Engines's largest round on record is $45M, in Sept 2022. ### Who backed Reaction Engines first? Reaction Engines's first round on record, in Apr 2018, was backed by Baillie Gifford, Boeing HorizonX and Rolls-Royce and 2 others. ### What stage is Reaction Engines at? Reaction Engines's latest named round is an Undisclosed round, in Apr 2018. ### Where is Reaction Engines based? Reaction Engines is based in the United Kingdom. ## Companies like Reaction Engines In the same sector, and raised in the last eighteen months. [**Foundational** $19M · Oct 2026](https://millionrounds.com/company/foundational)[**Open Cosmos** $403M · Sept 2026](https://millionrounds.com/company/open-cosmos)[**Productive Machines** $5.9M · Sept 2026](https://millionrounds.com/company/productive-machines)[**Cambridge Aerospace** $400M · Aug 2026](https://millionrounds.com/company/cambridge-aerospace)[**Archangel Lightworks** $17M · Aug 2026](https://millionrounds.com/company/archangel-lightworks)[**Holdson** $2.8M · Jul 2026](https://millionrounds.com/company/holdson) ## 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