The Principal Financial Group Corporate Headquarters

711 High St.
Des Moines, Iowa 50392
1-800-986-EDGE (3343)

The Principal Financial Group on the Internet

The Principal website at www.principal.com is your source for a vast array of information including company news releases, investment and savings tools and details on our product and service solutions.

The Investor Relations portion of the site provides up-to- the-minute information for shareholders and the investment community, including access to Securities and Exchange Commission filings, stock information, overview of corporate responsibility, dividend history and credit ratings. It also includes information of interest on the governance of Principal Financial Group, Inc., including:

• Board of directors
• Corporate governance guidelines
• Board committee charters
• Director independence standards
• Corporate code of business conduct ethics

Annual Meeting

The Annual Meeting of Shareholders will convene at 9 a.m. CT, May 19, 2015, at the corporate headquarters of Principal Financial Group, Inc.

750 Park St.
Des Moines, Iowa 50392

Contact Investor Relations

If you have a question for Investor Relations, please contact:

The Principal Financial Group—Investor Relations
801 Grand Avenue, G-029-S30
Des Moines, Iowa 50392-0420
Phone: 1-800-986-3343 | Fax: 515-235-5491
Email: investor-relations@principal.com

Transfer Agent

Principal Financial Group, Inc. shareholder inquiries should be addressed to our transfer agent, Computershare. Computershare can assist shareholders with a variety of services, including: signing up for the direct deposit of dividends, address changes, certificate issuance, account statements, balance inquiries, dividend inquiries and selling of shares. You can call or write to the transfer agent at:

Principal Financial Group, Inc.
c/o Computershare
P.O. Box 30170
College Station, TX 77842-3170

Toll-free phone: 866-781-1368
Phone for hearing impaired: 312-588-4110
Online: www.computershare.com/contactus

Registered shareholders can also access information about their Principal Financial Group, Inc. common stock accounts via the Internet using Computershare’s website at www.computershare.com/contactus. The Principal does not maintain or provide information directly to this site, makes no representations or warranties with respect to the information contained therein and takes no responsibility for supplementing, correcting or updating any such information.

A Special Thanks

A special thanks to our 340,000 registered shareholders, who have owned Principal Financial Group, Inc. common stock since our initial public offering.

Top 15 Holders* of Principal Financial Group, Inc. Common Stock

• The Vanguard Group, Inc.
• Nippon Life Insurance Company
• Capital Research Global Investors (U.S.)
• Wellington Management Company, LLP
• State Street Global Advisors (SSgA)
• BlackRock Fund Advisors
• Harris Associates, L.P.
• Northern Trust Investments, Inc.
• Newton Investment Management, LTD
• Fidelity Management & Research Company
• Goldman Sachs Asset Management, L.P. (U.S.)
• Mairs & Power, Inc.
• TIAA-CREF Investment Management
• Geode Capital Management, LLC
• Dimensional Fund Advisors, L.P. (U.S)

*Based on public filings as of Dec. 31, 2014

Reportable Segments of Principal Financial Group, Inc.

As of Dec. 31, 2014

Retirement and Investor Services

• Delaware Charter Guarantee & Trust Company d/b/a Principal Trust Company
• Principal Bank
• Principal Financial Advisors, Inc.
• Principal Funds Distributor, Inc.
• Principal Life Insurance Company
• Principal Management Corporation
• Principal Shareholder Services, Inc.
• Princor Financial Services Corporation

Principal Global Investors

Australia

• Principal Global Investors (Australia) Ltd

Brazil

• Service Company Pty Ltd Brazil
• Principal Global Investors Participacoes, Ltds

Europe

• Principal Global Investors (Europe) Limited
• Finisterre Capital, LLP
• Liongate Capital Management
• Origin Asset Management
• Principal Global Investors (Ireland) Limited

Hong Kong, SAR

• Principal Global Investors (Hong Kong) Limited

Japan

• Principal Global Investors (Japan) Limited

Malaysia

• CIMB-Principal Islamic Asset Management Berhad

Singapore

• Principal Global Investors (Singapore) Limited

United States

• Columbus Circle Investors
• Edge Asset Management, Inc.
• Morley Capital Management, Inc.
• Post Advisory Group, LLC
• Principal Commercial Acceptance, LLC
• Principal Commercial Funding, LLC
• Principal Development Investors, LLC
• Principal Enterprise Capital, LLC
• Principal Global Investors, LLC
• Principal Real Estate Investors, LLC
• Spectrum Asset Management, Inc.
• Union Bond & Trust Company

U.S. Insurance Solutions

• Diversified Dental Services, Inc.
• Employers Dental Services, Inc.
• First Dental Health
• Preferred Product Network, Inc.
• Principal Dental Services, Inc.
• Principal Life Insurance Company
• Principal Life Insurance Company of Iowa
• Principal National Life Insurance Company
• Principal Reinsurance Company of Delaware
• Principal Reinsurance Company of Vermont

Principal International

Brazil

• BrasilPrev Seguros e Previdência S.A.
• Claritas Administração de Recursos Ltda

Chile

• Administradora de Fondos de Pensiones Cuprum S.A.
• Hipotecaria Cruz de Sur Principal, S.A.
• Principal Administradora General de Fondos S.A.
• Principal Asset Management Chile S.A.
• Principal Compañía de Seguros de Vida Chile S.A.

China

• CCB Principal Asset Management Company, LTD

Hong Kong, SAR

• Principal Asset Management Company (Asia) Limited
• Principal Insurance Company (Hong Kong) Limited
• Principal Trust Company (Asia) Limited
• Principal Global Investors (Asia) Limited

India

• Principal Retirement Advisors Private Limited
• Principal PNB Asset Management Company Private Limited
• Principal Trustee Company Private Limited

Indonesia

• PT CIMB—Principal Asset Management

Malaysia

• CIMB—Principal Asset Management Berhad
• CIMB Wealth Advisors Berhad

Mexico

• Principal Afore, S.A. de C.V.
• Principal Financial Group, S.A. de C.V. Grupo Financerio
• Principal Fondos de Inversión, S.A. de C.V., Operadora de Fondos de Inversion
• Principal Mexico Compañía de Seguros, S.A. de C.V.
• Principal Pensiones, S.A. de C.V.

Singapore

• CIMB—Principal Asset Management (Singapore) Pte Ltd

Thailand

• CIMB—Principal Asset Management Company Ltd

Corporate

• Principal Global Services Private Limited
• Principal Life Insurance Company
• Principal Real Estate Fund Investors, LLC
• Principal Real Estate Portfolio, Inc.

Principal Funds Organized by Principal Life Insurance Company | as of Dec. 31, 2014

Principal Funds

• Blue Chip Fund
• Bond & Mortgage Securities Fund
• Bond Market Index Fund
• California Municipal Fund
• Capital Securities Fund
• Credit Opportunities Explorer Fund
• Core Plus Bond Fund I
• Diversified International Fund
• Diversified Real Asset Fund
• Dynamic High Yield Explorer Fund
• Equity Income Fund
• Global Diversified Income Fund
• Global Multi-Strategy Fund
• Global Opportunities Fund
• Global Real Estate Securities Fund
• Government & High Quality Bond Fund
• High Yield Fund
• High Yield Fund I
• Income Fund
• Inflation Protection Fund
• International Emerging Markets Fund
• International Equity Index Fund
• International Fund I
• International Small Company Fund
• LargeCap Blend Fund II
• LargeCap Growth Fund
• LargeCap Growth Fund I
• LargeCap Growth Fund II
• LargeCap S&P 500 Index Fund
• LargeCap Value Fund
• LargeCap Value Fund III
• MidCap Fund
• MidCap Growth Fund
• MidCap Growth Fund III
• MidCap S&P 400 Index Fund
• MidCap Value Fund I
• MidCap Value Fund III
• Money Market Fund

• Opportunistic Municipal Fund
• Overseas Fund
• Preferred Securities Fund
• Principal Capital Appreciation Fund
• Principal LifeTime 2010 Fund
• Principal LifeTime 2015 Fund
• Principal LifeTime 2020 Fund
• Principal LifeTime 2025 Fund
• Principal LifeTime 2030 Fund
• Principal LifeTime 2035 Fund
• Principal LifeTime 2040 Fund
• Principal LifeTime 2045 Fund
• Principal LifeTime 2050 Fund
• Principal LifeTime 2055 Fund
• Principal LifeTime 2060 Fund
• Principal LifeTime Strategic Income Fund
• Principal LifeTime Hybrid 2015 Fund
• Principal LifeTime Hybrid 2020 Fund
• Principal LifeTime Hybrid 2025 Fund
• Principal LifeTime Hybrid 2030 Fund
• Principal LifeTime Hybrid 2035 Fund
• Principal LifeTime Hybrid 2040 Fund
• Principal LifeTime Hybrid 2045 Fund
• Principal LifeTime Hybrid 2050 Fund
• Principal LifeTime Hybrid 2055 Fund
• Principal LifeTime Hybrid 2060 Fund
• Principal LifeTime Hybrid Income Fund
• Real Estate Allocation Fund
• Real Estate Debt Income Fund
• Real Estate Securities Fund
• SAM Balanced Portfolio
• SAM Conservative Balanced Portfolio
• SAM Conservative Growth Portfolio
• SAM Flexible Income Portfolio
• SAM Strategic Growth Portfolio
• Short-Term Income Fund
• SmallCap Blend Fund
• SmallCap Growth Fund I
• SmallCap S&P 600 Index Fund
• SmallCap Value Fund II
• Small-MidCap Dividend Income Fund
• Tax-Exempt Bond Fund

Principal Variable Contracts Fund, Inc.*

*The Principal Variable Contracts Fund investment options are available in certain variable annuity and variable life insurance contracts.

Mutual funds and variable contracts are distributed by Principal Funds Distributor, Inc., a member of the Principal Financial Group, Des Moines, Iowa 50392-0200. Phone 1-800-222-5852.

The contents of this publication are for general information only and are not intended to solicit the purchase of products from companies of the Principal Financial Group.