- Upstream SecurityPrivate-
- UpsunPrivate-
- Uptake TechnologiesPrivate$2.3B
- Up&UpPrivate-
- UpvestPrivate$735M
- Upward FarmsPrivate$240M
- UpwayPrivate$400M
- Upwind SecurityPrivate$3.8B
- UpworkPublic$1.3B
- Ur-EnergyPublic$298M
- Uranium EnergyPublic$3.4B
- Uranium RoyaltyPublic$1.2B
- Urban CompanyPublic$2.5B
- Urban OnePublic$17M
- Urban Sports ClubPrivate$600M
- Urban VoltPrivate$23M
- Urbanica IsraelPublic$268M
- UrbanisePublic$36M
- Ureru Net AdvertisingPublic$19M
- UridokiPublic$47M
- UroGen PharmaPublic$1.2B
- UroMemsPrivate-
- UrotronicPrivate$601M
- UrovoPublic$703M
- Ursa MajorPrivate$600M
- UrtestePublic$16M
- US FoodsPublic$23B
- US GoldminingPublic$74M
- US HealthVestPrivate-
- USA CompressionPublic$3.6B
- USA Rare EarthPublic$3.1B
- USA TODAYPublic$971M
- Uşak SeramikPublic$20M
- USANAPublic$252M
- USCB Financial HoldingsPublic$362M
- User LocalPublic$125M
- UserZoomPrivate$800M
- Usha MartinPublic$1.5B
- USHOPALPrivate-
- UshurPrivate$34M
- USI Insurance ServicesPrivate$17B
- UsiminasPublic$1.1B
- UsioPublic$84M
- USS Co.Public$5.2B
- USTPrivate$1B
- USU SoftwarePublic$100M
- UT GroupPublic$813M
- Utah MedicalPublic$206M
- UTI Asset ManagementPublic$1.1B
- UtilidataPrivate-
- Utility GlobalPrivate-
- UtilityInnovation GroupPrivate$1.4B
- UTimePublic$134M
- UTOPIA FiberPrivate-
- UTour GroupPublic$790M
- Utssav CZ Gold JewelsPublic$208M
- Utz BrandsPublic$1.3B
- UVeyePrivate$800M
- UxinPublic$178M
- Uzin UtzPublic$369M
- UzumPrivate$2.4B




