United States · 
Who invested in Epirus?
Epirus's investors include 8VC, Washington Harbour Partners Lp, Gaingels, National Science Foundation and StepStone Group, and 1 more on record.
20252026
?Round$250MSeries D?VentureUnited States · Venture startup
Who invested in Epirus
3 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.
Valuation: $1.4B, Mar 2026
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Funding summaryUpdated 5 Nov 2026
$250Mraised across 3 rounds since 2025, from 6 sources
- Latest round
- VentureOct 2025
- Biggest round
- $250MSeries D · Mar 2025
- Investors
- 6 (2 led)
The funding story
Each circle is a round, placed by date and sized by amount. The line above is the running total.
- First round
- Round Jan 2025
- Biggest round
- $250M Series D · Mar 2025
- Usual gap between rounds
- 7 months the median of 2
The rounds
- Oct 2025VentureAmount undisclosed2 new3 returning
Source recorded
- Mar 2025Series D$250M3 new1 returning
Reported by Crunchbase News and 3 others
- Jan 2025
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.
Round2025Series D2025Venture2025
8VCLL
Washington Harbour Partners LpL
Gaingels
National Science Foundation
StepStone Group
General Dynamics Land Systems
8VCLLWashington Harbour Partners LpLGaingelsNational Science FoundationStepStone GroupGeneral Dynamics Land SystemsEveryone who backed them
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Also claim to have backed them
These 4 firms list Epirus as a portfolio company on their own websites, but no report of a round names them. They are the firms' own claims, kept apart from the rounds above.
Quick answers about Epirus
How much has Epirus raised?
Epirus has raised $250M across 3 rounds since 2025. 2 rounds did not disclose an amount, so the total is a floor.
When did Epirus last raise?
Epirus's most recent round was a Venture in Oct 2025.
What was Epirus's biggest round?
Epirus's largest round on record is $250M (Series D), in Mar 2025, led by 8VC.
Who backed Epirus first?
Epirus's first round on record, in Jan 2025, was backed by 8VC.
What stage is Epirus at?
Epirus's latest named round is a Venture, in Oct 2025.
Where is Epirus based?
Epirus is based in the United States.
Who led Epirus's rounds?
8VC led the funding round in 2025.
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