129160
SUPPLEMENT TO THE PROSPECTUS
DATED JULY 12, 1999
MASON STREET FUNDS, INC.
William M. Riegel has replaced Michael J. Kelly as co-
manager of the Growth and Income Stock Fund, effective
September 20, 1999. Mr. Riegel, Managing Director of J.P.
Morgan Investment Management, Inc., joined J.P. Morgan in
1979. He is a senior equity portfolio manager in the Equity
and Balanced Accounts Group. Mr. Riegel graduated from
Williams College in 1978 and is a Chartered Financial
Analyst. He also shares primary responsibility for the
Growth and Income Stock Portfolio of Northwestern Mutual
Series Fund, Inc.
The date of this Prospectus Supplement is October 12, 1999.
