Principal Financial Group Inc. will release fourth-quarter 2010 financial results after U.S. markets close on Feb. 7.  On Feb. 8 at 9 a.m. Central Time, Larry Zimpleman, chairman, president and CEO, and Terry Lillis, senior vice president and chief financial officer, will discuss fourth-quarter results during a live conference call, and other members of senior management will be available for a question-and-answer session. To listen to the webcast, visit www.principal.com/investor 10 to 15 minutes prior to the call. To listen by telephone, call (800) 374-1609 approximately 10 minutes prior to the call. The access code is 34798317.