Nashville-based iPayment has acquired ISO Transaction Solutions. The deal adds approximately 4,000 small merchants and annual charge volume of approximately $500 million to iPayment’s portfolio. Last month, iPayment reported second quarter charge volume of nearly $3.2 billion, compared to $2.9 billion in the previous quarter, and $1.6 billion one-year ago. Second quarter revenues jumped by 65% to $89.4 million compared to $80 million for the first quarter, and $54 million for 2Q/03. For complete details on iPayment’s second quarter performance visit CardData ([www.carddata.com]).