Piedmont Office Realty Trust, a REIT specializing in high-quality office buildings with 73 properties as of Sept. 30, filed on Monday with the SEC to raise up to $345 million in an initial public offering. The Johns Creek, GA-based company was founded in 1997 and booked $589 million in sales over the last 12 months. Morgan Stanley and J.P. Morgan are the lead underwriters on the deal, for which pricing terms and timing were not disclosed.