{"acquisitions":[],"changes":[{"companyHref":"/c/rivermarkets-com","date":"2026-09-27","documentUrl":null,"domain":"rivermarkets.com","fact":"latest round","name":"River Markets","new":{"amountUsd":1000000,"date":"2026-03-01","lead":null,"type":"seed"},"old":{"amountUsd":1000000,"date":"2026-03-01","lead":"yc","type":"seed"},"publisher":"yc","reason":null,"retrievedAt":"2026-06-16","slug":"rivermarkets-com","status":"attributed","url":"https://whoraisedwhat.com/c/rivermarkets-com"},{"companyHref":"/c/rivermarkets-com","date":"2026-09-24","documentUrl":"https://www.ycombinator.com/companies/river-markets","domain":"rivermarkets.com","fact":"provenance:description","name":"River Markets","new":{"publisher":"Y Combinator","status":"sourced","url":"https://www.ycombinator.com/companies/river-markets"},"old":{"publisher":"rivermarkets.com","status":"self-reported","url":"https://rivermarkets.com"},"publisher":"Y Combinator","reason":null,"retrievedAt":"2026-09-17","slug":"rivermarkets-com","status":"sourced","url":"https://whoraisedwhat.com/c/rivermarkets-com"},{"companyHref":"/c/rivermarkets-com","date":"2026-09-24","documentUrl":"https://www.ycombinator.com/companies/river-markets","domain":"rivermarkets.com","fact":"provenance:existence","name":"River Markets","new":{"publisher":"Y Combinator","status":"sourced","url":"https://www.ycombinator.com/companies/river-markets"},"old":{"publisher":"rivermarkets.com","status":"self-reported","url":"https://rivermarkets.com"},"publisher":"Y Combinator","reason":null,"retrievedAt":"2026-09-17","slug":"rivermarkets-com","status":"sourced","url":"https://whoraisedwhat.com/c/rivermarkets-com"}],"country":"US","description":"Prime brokerage for prediction markets","domain":"rivermarkets.com","employees":null,"founded":2026,"fundingTotalQuarantined":false,"githubOrg":null,"githubStars":null,"industry":"unknown","industrySources":[],"investors":["yc"],"lat":null,"lng":null,"location":null,"multiples":[],"name":"River Markets","people":[{"name":"Antonin Parrot","role":"founder","slug":"antonin-parrot"},{"name":"Oscar Levy","role":"ceo","slug":"oscar-levy"},{"name":"Oscar Levy","role":"founder","slug":"oscar-levy"}],"revenues":[],"rounds":[{"amountQuarantined":false,"amountUsd":1000000,"connectionsAmong":[],"currency":"USD","date":"2026-03-01","investments":[],"investors":[],"leadInvestor":null,"leadInvestors":[],"people":[],"slug":"rivermarkets-com-2026-03-01-seed","source":{"fact":"round","publisher":"yc","retrievedAt":"2026-06-16","status":"attributed","url":null},"status":"attributed","type":"seed","url":null}],"slug":"rivermarkets-com","sources":[{"fact":"round","publisher":"yc","retrievedAt":"2026-06-16","status":"attributed","url":null},{"fact":"existence","publisher":"Y Combinator","retrievedAt":"2026-09-17","status":"sourced","url":"https://www.ycombinator.com/companies/river-markets"},{"fact":"description","publisher":"Y Combinator","retrievedAt":"2026-09-17","status":"sourced","url":"https://www.ycombinator.com/companies/river-markets"}],"stage":"seed","stockCard":{"asOf":"2026-11-09","description":{"sources":[{"fact":"description","publisher":"Y Combinator","retrievedAt":"2026-09-17","status":"sourced","url":"https://www.ycombinator.com/companies/river-markets"}],"value":"Prime brokerage for prediction markets"},"facts":[{"id":"description:Prime brokerage for prediction markets","kind":"description","sources":[{"fact":"description","publisher":"Y Combinator","retrievedAt":"2026-09-17","status":"sourced","url":"https://www.ycombinator.com/companies/river-markets"}],"text":"Prime brokerage for prediction markets"}],"generatedAt":"2026-11-09","state":"insufficient-evidence","tldr":[]},"techStack":["amazon cloudfront","amazon s3","amazon web services"],"totalRaisedUsd":1000000,"traction":[],"updatedAt":"2026-09-29","valuations":[]}