Northwestern Mutual's wholly-owned asset management company, Mason Street Advisors, LLC, has named David R. Keuler and Michael P. Johnson co-managers of the Growth Stock Fund portfolio for Mason Street Funds, Inc. and the Northwestern Mutual Series Funds, Inc. effective immediately.

Keuler, a director with Mason Street Advisors, also coordinates the Asset Allocation portfolios for Mason Street Funds and the Series Fund, and has extensive experience managing both domestic and foreign stocks. Johnson, also a director with Mason Street Advisors, has portfolio responsibilities for Northwestern Mutual's Pension Fund and the Northwestern Mutual Foundation.

"Both Keuler and Johnson are part of Mason Street Advisors' experienced team of investment professionals, and together they bring 24 years of investment experience to the Growth Stock Fund," says Mason Ross, executive vice president and chief investment officer at Northwestern Mutual. In fact, fund managers at Mason Street Advisors have an average tenure of 17 years, as compared to the industry average that is less than four years. "We are confident in a smooth transition, and the fund remains committed it its overall investment strategy of diversification and consistency," adds Ross.

Keuler, CFA, joined Northwestern Mutual in 1991 as a common stock specialist. He received his B.A. in economics and mathematics from Boston University in 1983, and his M.B.A. in finance from Indiana University in 1988.

Johnson, CFA, joined Northwestern Mutual in 1984. He received B.B.A. degrees in accounting and management computer systems in 1983 from the University of Wisconsin-Whitewater, and a M.S. degree in finance from the University of Wisconsin-Milwaukee in 1992.

Northwestern Mutual, the nation's largest direct provider of individual life insurance according to A. M. Best, has always received the highest possible ratings for financial strength from Standard & Poor's, Moody's, Fitch, and A. M. Best. In addition to life insurance, the company, its subsidiaries and affiliates are also providers of annuities, mutual funds, long-term care insurance and disability income insurance. These products and services are distributed through the Northwestern Mutual Financial Network and its 7,800 financial representatives.

Mason Street Advisors, LLC is a federally registered investment advisor, providing investment management services to corporate, charitable and retirement accounts and mutual funds. Northwestern Mutual is neither a broker-dealer nor an investment advisor.

Among Northwestern Mutual's affiliated companies are the Frank Russell Company, the investment management and advisory firm; Northwestern Mutual Investment Services, LLC (NMIS), the securities brokerage firm; and Northwestern Mutual Trust Company, a special purpose federal savings bank. Further information on Northwestern Mutual, based in Milwaukee, Wisconsin, can be found at: www.northwesternmutual.com .

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SOURCE: Northwestern Mutual

CONTACT: Deanna Tillisch, +1-414-665-2705, or
Deannatillisch@northwesternmutual.com , or Jean Towell, +1-414-665-5167, or
Jeantowell@northwesternmutual.com , both of Northwestern Mutual

Web site: http://www.northwesternmutual.com/