SOI, a Charlotte NC-based professional employer organization, shelved plans to go public, according to a filing with the U.S. Securities and Exchange Commission.

The filing on Oct. 10 said the company was withdrawing its request for registration of stock because of unfavorable market conditions.

SOI posted net revenue of $164.2 million in the nine months ended Sept. 30, 2007, according to a previous filing with the SEC.