The London-listed funds house said its assets under management (AUM) had jumped to $65.8bn in the three months to 30 June, boosted by the acquisition of peer Emerging Markets Management, which added $10bn of assets.
Ashmore had held AUM of about $50.3bn in the previous quarter.
The fund manager, which specialises in investing in emerging markets, also saw positive investment performance add a further $1bn to its AUM.
Analysts at Singer Capital Markets had forecast $2.9bn of new money and a $1.3bn boost from improved investment performance.
Ashmore said it anticipated performance fees for the full year to hit £85m, up from £82.9m the previous year. It said the fees had risen primarily from strong investment performance in funds with August and April year ends.
Numis analyst David McCann said: “We see significant organic growth opportunities from new and existing investors.”