Index 600 Stock 

Fund Overview
Adviser: Mason Street Advisors, LLC
Objective/Focus: The objective is to achieve investment results that approximate the performance of the S&P SmallCap 600® Index.
Asset Class: Small-Cap Stocks
Style: Blend
Investing in small company stocks involves a greater degree of risk than investing in medium or large company stocks.
Indices are unmanaged, cannot be invested in directly.
Fund Facts as of 09/30/14
Fund Inception 04-30-2007
First Available for Variable Annuity 04-30-2007
First Available for Variable Life 06-30-2011
Net Assets $90.79 Million
Top 10 Portfolio Holdings % of Net Assets
iShares S&P SmallCap 600 Index Fund 2.1%
Teledyne Technologies, Inc. 0.5%
PAREXEL International Corp. 0.5%
TreeHouse Foods, Inc. 0.5%
US Silica Holdings, Inc. 0.5%
TriQuint Semiconductor, Inc. 0.5%
The Toro Co. 0.5%
Curtiss-Wright Corp. 0.4%
West Pharmaceutical Services, Inc. 0.4%
Tanger Factory Outlet Centers, Inc. 0.4%
Total % of Net Assets 6.3%
Download Publicly Disclosed Holdings
Sector Weightings % of Equities
Financials 22.0%
Information Technology 16.9%
Industrials 15.5%
Consumer Discretionary 13.8%
Health Care 10.6%

You should carefully consider the investment objectives, risks, expenses and charges of the investment company before you invest. Your Northwestern Mutual Investment Services Registered Representative can provide you with a contract and fund prospectus that will contain the information noted above, and other important information that you should read carefully before you invest or send money.

Mason Street Advisors, LLC (MSA), a wholly owned company of Northwestern Mutual, is a federally registered investment adviser. MSA is the principal investment adviser for all the Portfolios in the Northwestern Mutual Series Fund (Series Fund). (Portfolios in the Series Funds are identified by the parenthetical next to the portfolio name.) MSA has engaged and oversees subadvisers who provide day-to-day management for certain of the Series Fund Portfolios. Each subadviser may be replaced without the approval of shareholders. Please see the prospectus for more information. Additional fund options are advised by Russell Investments, Fidelity® Investments, Credit Suisse Asset Management, LLC, and Neuberger Berman Management, LLC.

All securities are offered through Northwestern Mutual Investment Services LLC, (NMIS), Subsidiary of Northwestern Mutual and member FINRA and SIPC.

 "Standard & Poor's®", "S&P 400®", "S&P MidCap 400 Index" and "Standard & Poor's MidCap 400 Index", "S&P 500®", "S&P 500 Index", "Standard & Poor's 500 Index", "S&P 600®", "S&P 600 Index" and "Standard & Poor's 600 Index" are trademarks of The McGraw-Hill, Companies, Inc. and have been licensed for use by The Northwestern Mutual Life Insurance Company. The funds are not sponsored, endorsed, sold or promoted by Standard & Poor's, and Standard & Poor's makes no representation regarding the advisability of investing in the funds.