Investor Lists

Investors from the United States in Ireland

Updated 7 November 2026

Firms based in the United States that we have watched in a round raised by a company in Ireland in the last two years. The investors who already make this crossing, ranked by how many of those rounds they joined.

See all 69 →The top 25
69investors on the list+1 this week
3,544cheques in 12 months-19% against the market
$15Mmedian round they joined+88% against the market median
97%wrote a cheque in 12 months
70%have led a round

The Top 25

Ordered by rounds in Ireland, never by anything anyone paid for

Deploying now (25)

  1. 1Y CombinatorDeploying nowAccelerator · United States7 of 6,412$3Mmedian roundOct 2026last seen
  2. 2SOSVDeploying nowVC firm · United States6 of 951$2.5Mmedian roundNov 2026last seen
  3. 3MedTech InnovatorDeploying nowAccelerator · United States6 of 160$2.8Mmedian roundSept 2026last seen
  4. 4GaingelsDeploying nowPrivate equity · United States5 of 1,010$8Mmedian roundOct 2026last seen
  5. 5RA Capital ManagementDeploying nowPrivate equity · United States3 of 395$93Mmedian roundNov 2026last seen
  6. 6FJ LabsDeploying nowVC firm · United States2 of 849$11Mmedian roundOct 2026last seen
  7. 7First Round CapitalDeploying nowVC firm · United States2 of 807$18Mmedian roundOct 2026last seen
  8. 8Union Square VenturesDeploying nowVC firm · United States2 of 407$17Mmedian roundNov 2026last seen
  9. 9Endeavor CatalystDeploying nowCorporate VC · United States2 of 318$30Mmedian roundOct 2026last seen
  10. 10Morgan Stanley Investment ManagementDeploying nowPrivate equity · United States2 of 288$56Mmedian roundOct 2026last seen
  11. 11Unpopular VenturesDeploying nowVC firm · United States2 of 264$3Mmedian roundSept 2026last seen
  12. 12DeerfieldDeploying nowVC firm · United States2 of 198$50Mmedian roundOct 2026last seen
  13. 13Cormorant Asset ManagementDeploying nowPrivate equity · United States2 of 176$102Mmedian roundOct 2026last seen
  14. 14Foresite CapitalDeploying nowPrivate equity · United States2 of 121$90Mmedian roundSept 2026last seen
  15. 15SVG VenturesDeploying nowAccelerator · United States2 of 119$1.6Mmedian roundSept 2026last seen
  16. 16S2G InvestmentsDeploying nowGrowth equity · United States2 of 102$16Mmedian roundOct 2026last seen
  17. 17RTW Investments LLCDeploying nowGrowth equity · United States2 of 88$123Mmedian roundNov 2026last seen
  18. 18IAG Capital PartnersDeploying nowPrivate equity · United States2 of 46$15Mmedian roundSept 2026last seen
  19. 19TechstarsDeploying nowVC firm · United States1 of 2,989$1.2Mmedian roundNov 2026last seen
  20. 20New Enterprise AssociatesDeploying nowVC firm · United States1 of 1,610$34Mmedian roundOct 2026last seen
  21. 21Plug and PlayDeploying nowAccelerator · United States1 of 1,561$5Mmedian roundNov 2026last seen
  22. 22Google for StartupsDeploying nowAccelerator · United States1 of 811$1.4Mmedian roundSept 2026last seen
  23. 23GreycroftDeploying nowVC firm · United States1 of 655$13Mmedian roundNov 2026last seen
  24. 24Salesforce VenturesDeploying nowCorporate VC · United States1 of 649$26Mmedian roundNov 2026last seen
  25. 25FelicisDeploying nowVC firm · United States1 of 640$20Mmedian roundNov 2026last seen
44 more on this list

All 69 are in the app, with filters for stage, sector and market. A free account shows 10 per search, Pro up to 1,000.

See the whole list →

Quick answers about investors from the United States in Ireland

Who are the most active investors from the United States in Ireland?

By rounds in Ireland, the most active are Y Combinator, SOSV, MedTech Innovator, Gaingels and RA Capital Management.

How many investors from the United States in Ireland are there?

69 are on record. 97% made an investment in the last 12 months and 70% have led a round.

Which stages do investors from the United States in Ireland back?

Of the rounds with a named stage in the last 12 months, mostly Series A (23%) and Seed (23%).

How big are the rounds investors from the United States in Ireland join?

The typical (median) round among the leading investors here is $16M.

Which sectors do investors from the United States in Ireland back most?

In the last 12 months, mostly AI, Biotech and Fintech.

Which investors from the United States in Ireland lead the most rounds?

New Enterprise Associates (73 led), Union Square Ventures (17 led) and Felicis (17 led).

Where are investors from the United States in Ireland based?

Most of the leading investors here are based in the United States (25 of the top 25).

What have investors from the United States in Ireland invested in recently?

Recent rounds include Ocient (Series C, Nov 2026, with Greycroft), Harbinger (Series D+, Nov 2026, with Greycroft) and ArrayPatch (Seed, Nov 2026, with Lakeside Capital).

Built from the rounds we watched, refreshed every night. How we count · Report a correction