3M Company

Abbott Laboratories

Advance Auto Parts, Inc.

Advanced Micro Devices, Inc.

Aetna Inc.

Affiliated Computer Services, Inc.

Aflac Incorporated

AGCO Corporation

Agilent Technologies, Inc.

Air Products and Chemicals, Inc.

AK Steel Holding Corporation

Alcoa Inc.

Aleris International, Inc.

Allegheny Technologies Incorporated

Allied Waste Industries, Inc.

ALLTEL Corporation

Altria Group, Inc.

Amazon.com, Inc.

Ameren Corporation

American Electric Power Company, Inc.

American Express Company

American Family Insurance Group

American International Group, Inc.

Ameriprise Financial, Inc.

AmerisourceBergen Corporation

Amgen Inc.

AMR Corporation

Anadarko Petroleum Corporation

Anheuser-Busch Companies, Inc.

Anixter International Inc.

Aon Corporation

Apache Corporation

Apple Inc.

Applied Materials, Inc.

ARAMARK Corporation

Archer Daniels Midland Company

Arrow Electronics, Inc.

ArvinMeritor, Inc.

Asbury Automotive Group, Inc.

Ashland Inc.

Assurant, Inc.

Atmos Energy Corporation

AT&T Inc.

Autoliv, Inc.

Automatic Data Processing, Inc.

AutoNation, Inc.

Auto-Owners Insurance Group

AutoZone, Inc.

Avaya Inc.

Avery Dennison Corporation

Avis Budget Group, Inc.

Avnet, Inc.

Avon Products, Inc.

Baker Hughes Incorporated

Ball Corporation

Bank of America Corporation

Barnes & Noble, Inc.

Baxter International Inc.

BB&T Corporation

Beazer Homes USA, Inc.

Becton, Dickinson and Company

Bed Bath & Beyond Inc.

Berkshire Hathaway Inc.

Best Buy Co., Inc.

Big Lots, Inc.

BJ Services Company

BJ's Wholesale Club, Inc.

Blockbuster Inc.

BlueLinx Holdings Inc.

Boise Cascade Holdings, L.L.C.

BorgWarner Inc.

Boston Scientific Corporation

Bristol-Myers Squibb Company

Brunswick Corporation

Burlington Northern Santa Fe Corporation

Cablevision Systems Corporation

Calpine Corporation

Campbell Soup Company

Capital One Financial Corporation

Cardinal Health, Inc.

Caremark Pharmacy Services

CarMax, Inc.

Caterpillar Inc.

CBS Corporation

CDW Corporation

Celanese Corporation

CenterPoint Energy, Inc.

Centex Corporation

C.H. Robinson Worldwide, Inc.

Charter Communications, Inc.

Chesapeake Energy Corporation

Chevron Corporation

Chiquita Brands International, Inc.

CHS Inc.

CIGNA Corporation

Cincinnati Financial Corporation

Circuit City Stores, Inc.

Cisco Systems, Inc.

CIT Group Inc.

Citigroup Inc.

Clear Channel Communications, Inc.

CMS Energy Corporation

Coca-Cola Enterprises Inc.

Colgate-Palmolive Company

Comcast Corporation

Comerica Incorporated

Commercial Metals Company

Community Health Systems, Inc.

Computer Sciences Corporation

ConAgra Foods, Inc.

ConocoPhillips

Conseco, Inc.

Consolidated Edison, Inc.

Constellation Brands, Inc.

Constellation Energy Group, Inc.

Continental Airlines, Inc.

Corning Incorporated

Costco Wholesale Corporation

Countrywide Financial Corporation

Coventry Health Care, Inc.

Crown Holdings, Inc.

CSX Corporation

Cummins, Inc.

CVS Caremark Corporation

Dana Holding Corporation

Danaher Corporation

Darden Restaurants, Inc.

DaVita Inc.

Dean Foods Company

Deere & Company

Dell Inc.

Delphi Corporation

Delta Air Lines, Inc.

Devon Energy Corporation

Dillard's, Inc.

DISH Network Corporation

Dole Food Company, Inc.

Dollar General Corporation

Dominion Resources, Inc.

Dover Corporation

D.R. Horton, Inc.

DTE Energy Company

Duke Energy Corporation

E. I. du Pont de Nemours and Company

Eastman Chemical Company

Eastman Kodak Company

Eaton Corporation

eBay Inc.

Ecolab Inc.

Edison International

El Paso Corporation

Electronic Data Systems Corporation

Eli Lilly and Company

EMC Corporation

EMCOR Group, Inc.

Emerson Electric Co.

Enbridge Energy Partners, L.P.

Energy East Corporation

Energy Future Holdings Corp.

Energy Transfer Equity, L.P.

Entergy Corporation

Enterprise GP Holdings L.P.

Erie Insurance Group

Exelon Corporation

Expeditors International of Washington, Inc.

Express Scripts, Inc.

Exxon Mobil Corporation

Family Dollar Stores, Inc.

Federal Home Loan Mortgage Corporation

Federal-Mogul Corporation

FedEx Corporation

Fidelity National Financial, Inc.

Fifth Third Bancorp

First Data Corporation

FirstEnergy Corp.

Fiserv, Inc.

Fluor Corporation

Foot Locker, Inc.

Ford Motor Company

Fortune Brands, Inc.

FPL Group, Inc.

Franklin Resources, Inc.

Freeport-McMoRan Copper & Gold Inc.

Frontier Oil Corporation

GameStop Corp.

Gannett Co., Inc.

General Dynamics Corporation

General Electric Company

General Mills, Inc.

General Motors Corporation

Genuine Parts Company

Genworth Financial, Inc.

Global Partners LP

Goodrich Corporation

Google Inc.

Graybar Electric Company, Inc.

Group 1 Automotive, Inc.

H. J. Heinz Company

Halliburton Company

Harley-Davidson, Inc.

Harrah's Entertainment, Inc.

HCA Inc.

Health Net, Inc.

Henry Schein, Inc.

Hertz Global Holdings, Inc.

Hess Corporation

Hewlett-Packard Company

Hexion Specialty Chemicals, Inc.

Hilton Hotels Corporation

Honeywell International Inc.

Hormel Foods Corporation

Host Hotels & Resorts, Inc.

Hovnanian Enterprises, Inc.

H&R Block, Inc.

Humana Inc.

Huntsman Corporation

IAC/InterActiveCorp

Illinois Tool Works Inc.

Ingram Micro Inc.

Integrys Energy Group, Inc.

Intel Corporation

International Business Machines Corporation

International Paper Company

ITT Corporation

J. C. Penney Company, Inc.

Jacobs Engineering Group Inc.

Johnson & Johnson

Johnson Controls, Inc.

Jones Apparel Group, Inc.

JPMorgan Chase & Co.

KB Home

Kellogg Company

Kelly Services, Inc.

KeyCorp

Kimberly-Clark Corporation

Kinder Morgan Energy Partners, L.P.

Kindred Healthcare, Inc.

Kohl's Corporation

L-3 Communications Holdings, Inc.

Land O'Lakes, Inc.

Lear Corporation

Leggett & Platt, Incorporated

Lehman Brothers Holdings Inc.

Lennar Corporation

Level 3 Communications, Inc.

Lexmark International, Inc.

Liberty Global, Inc.

Liberty Media Corporation

Liberty Mutual Holding Company Inc.

Limited Brands, Inc.

Lincoln National Corporation

Liz Claiborne, Inc.

Lockheed Martin Corporation

Loews Corporation

Longs Drug Stores Corporation

Lowe's Companies, Inc.

Lucent Technologies Inc.

Macy's, Inc.

Manpower Inc.

Marathon Oil Corporation

Marriott International, Inc.

Marsh & McLennan Companies, Inc.

Marshall & Ilsley Corporation

Masco Corporation

Massachusetts Mutual Life Insurance Company

Mattel, Inc.

McDonald's Corporation

McKesson Corporation

M.D.C. Holdings, Inc.

MeadWestvaco Corporation

Medco Health Solutions, Inc.

Medtronic, Inc.

Merck & Co., Inc.

Merrill Lynch & Co., Inc.

MetLife, Inc.

MGM MIRAGE

Micron Technology, Inc.

Microsoft Corporation

Mirant Corporation

Mohawk Industries, Inc.

Molson Coors Brewing Company

Monsanto Company

Morgan Stanley

Motorola, Inc.

M&T Bank Corporation

Murphy Oil Corporation

Nash-Finch Company

National City Corporation

National Oilwell Varco, Inc.

Nationwide Mutual Insurance Company

NCR Corporation

New York Life Insurance Company

Newell Rubbermaid Inc.

Newmont Mining Corporation

News Corporation

NIKE, Inc.

NiSource Inc.

Nordstrom, Inc.

Norfolk Southern Corporation

Northeast Utilities

Northern Trust Corporation

Northrop Grumman Corporation

Northwest Airlines Corporation

NRG Energy, Inc.

Nucor Corporation

NVR, Inc.

Occidental Petroleum Corporation

Office Depot, Inc.

OfficeMax Incorporated

Omnicare, Inc.

Omnicom Group Inc.

ONEOK, Inc.

Oracle Corporation

Owens & Minor, Inc.

Owens Corning Sales, LLC

Owens-Illinois, Inc.

PACCAR Inc

Pacific Mutual Holding Company

Parker Hannifin Corporation

Peabody Energy Corporation

Penske Automotive Group, Inc.

Pepco Holdings, Inc.

PepsiCo, Inc.

Performance Food Group Company

Peter Kiewit Sons', Inc.

Pfizer Inc.

PG&E Corporation

Pilgrim's Pride Corporation

Pilgrim's Pride Corporation

Pitney Bowes Inc.

Plains All American Pipeline, L.P.

PPG Industries, Inc.

PPL Corporation

Praxair, Inc.

Principal Financial Group, Inc.

Progress Energy, Inc.

Prudential Financial, Inc.

Public Service Enterprise Group Incorporated

Publix Super Markets, Inc.

Pulte Homes, Inc.

QUALCOMM Incorporated

Quest Diagnostics Incorporated

Qwest Communications International Inc.

RadioShack Corporation

Raytheon Company

Realogy Corporation

Regions Financial Corporation

Reliance Steel & Aluminum Co.

Reliant Energy, Inc.

Reynolds American Inc.

Rite Aid Corporation

Rockwell Automation, Inc.

Rohm and Haas Company

Ross Stores, Inc.

R.R. Donnelley & Sons Company

Ryder System, Inc.

Ryerson, Inc.

Safeco Corporation

Safeway Inc.

SAIC, Inc.

Sanmina-SCI Corporation

Sara Lee Corporation

SCANA Corporation

Schering-Plough Corporation

Sealed Air Corporation

Sempra Energy

SLM Corporation

Smith International, Inc.

Smithfield Foods, Inc.

Smurfit-Stone Container Corporation

Sonic Automotive, Inc.

Southern Company

Southwest Airlines Co.

Sovereign Bancorp, Inc.

Sprint Nextel Corporation

SPX Corporation

Staples, Inc.

Starbucks Corporation

Starwood Hotels & Resorts Worldwide, Inc.

State Farm Mutual Automobile Insurance Company

State Street Corporation

Stryker Corporation

Sun Microsystems, Inc.

SunGard Data Systems Inc.

Sunoco, Inc.

SunTrust Banks, Inc.

SUPERVALU INC.

SYNNEX Corporation

SYSCO Corporation

Target Corporation

Teachers Insurance and Annuity Association - College Retirement Equities Fund

Tech Data Corporation

Temple-Inland Inc.

Tenet Healthcare Corporation

Tenneco Inc.

TEPPCO Partners, L.P.

Terex Corporation

Tesoro Corporation

Texas Instruments Incorporated

Textron Inc.

The Allstate Corporation

The Bank of New York Mellon Corporation

The Bear Stearns Companies Inc.

The Black & Decker Corporation

The Boeing Company

The Charles Schwab Corporation

The Chubb Corporation

The Clorox Company

The Coca-Cola Company

The DIRECTV Group, Inc.

The Dow Chemical Company

The Estée Lauder Companies Inc.

The First American Corporation

The Gap Inc.

The Goldman Sachs Group, Inc.

The Goodyear Tire & Rubber Company

The Guardian Life Insurance Company of America

The Hartford Financial Services Group, Inc.

The Hershey Company

The Home Depot, Inc.

The Interpublic Group of Companies, Inc.

The Kroger Co.

The McGraw-Hill Companies, Inc.

The Mosaic Company

The Mutual of Omaha Companies

The Northwestern Mutual Life Insurance Company

The Pantry, Inc.

The Pepsi Bottling Group, Inc.

The PNC Financial Services Group, Inc.

The Procter & Gamble Company

The Progressive Corporation

The Ryland Group, Inc.

The Shaw Group Inc.

The Sherwin-Williams Company

The Timken Company

The TJX Companies, Inc.

The Travelers Companies, Inc.

The Walt Disney Company

The Western Union Company

The Williams Companies, Inc.

Thrivent Financial for Lutherans

Time Warner Inc.

Toll Brothers, Inc.

Toys "R" Us, Inc.

Trane Inc.

Tribune Company

TRW Automotive Holdings Corp.

Tyson Foods, Inc.

UAL Corporation

UGI Corporation

Union Pacific Corporation

Unisys Corporation

United Parcel Service, Inc.

United States Steel Corporation

United Stationers Inc.

United Technologies Corporation

UnitedHealth Group Incorporated

Unum Group

US Airways Group, Inc.

U.S. Bancorp

USAA

USG Corporation

Valero Energy Corporation

Verizon Communications Inc.

VF Corporation

Viacom Inc.

Virgin Media Inc.

Visteon Corporation

W. R. Berkley Corporation

Wachovia Corporation

Walgreen Co.

Wal-Mart Stores, Inc.

Washington Mutual, Inc.

Waste Management, Inc.

WellPoint, Inc.

Wells Fargo & Company

WESCO International, Inc.

Western & Southern Financial Group

Western Digital Corporation

Weyerhaeuser Company

Whirlpool Corporation

Whole Foods Market, Inc.

Winn-Dixie Stores, Inc.

Wm. Wrigley Jr. Company

World Fuel Services Corporation

W.W. Grainger, Inc.

Wyeth

Xcel Energy Inc.

Xerox Corporation

XTO Energy Inc.

Yahoo! Inc.

YRC Worldwide Inc.

YUM! Brands, Inc.