Clayton Holdings, a provider of information-based analytics and specialty consulting on mortgage-related loans and securities and other debt instruments, announced Wednesday morning that it will offer 6.25 million shares at a range of $15 to $17. Assuming the stock prices at the midpoint, the company will have an initial market capitalization of $290 million. William Blair and Piper Jaffray are the lead managers on the deal. Timing has yet to be determined.

