UK's Experian tops FTSE 100 index on upbeat organic revenue growth

** Shares of Credit data company Experian EXPN up 4.1% at 4,011p

** Stock top pct gainer on FTSE 100 index CURRENCYCOM:UK100

** Co reports 8% organic revenue growth in first quarter, maintains annual organic revenue growth forecast of 6% to 8% and total revenue growth forecast of 9% to 11%

** Q1 organic revenue growth of 8% is ahead of expectations (consensus & Jefferies estimate 7%) - brokerage Jefferies

** Including session gains, stock up 16.5% YTD