Wells Fargo, the San Francisco-based bank with $1.3 trillion in assets and $131 billion in 2009 revenue, named Timothy Sloan CFO. He succeeds Howard Atkins, the bank’s CFO since 2001, who is taking a leave of absence and will retire in August. Sloan, 50, most recently was Wells’ chief administrative officer and senior executive vice president. Earlier, he served as head of commercial banking, real estate and specialized financial services, overseeing more than 25 lines of business. Sloan has worked at the bank for 23 years.