Ameriquest Mortgage clung to its lead in the market share race in both the wholesale and retail origination markets during the first quarter of 2005, a new Inside B&C Lending analysis and ranking of the top players reveals. On the retail side, Ameriquest paced the market with $8.65 billion in new loans. One of the market’s most aggressive advertisers with a high-profile sports marketing campaign, Ameriquest actually saw its market share slide, to 17.5…