The S&P MidCap 400 is a stock market index from S&P Dow Jones Indices.

The index serves as a barometer for the U.S. mid-cap equities sector and is the most widely followed mid-cap index in existence.

To be included in the index, a stock must have a total market capitalization that ranges from $1.4 billion to $5.9 billion at the time of addition to the index.

S&P MidCap 400 Companies

Aaron's Inc
Abiomed
American Campus Communities
Acadia Healthcare
ACI Worldwide Inc
AECOM
Acxiom
American Eagle Outfitters
American Financial Group Inc
AGCO Corp
Aspen Insurance Holdings Ltd
Akorn, Inc
Alexander & Baldwin Inc
Alleghany Corp
Allegheny Technologies Inc
AMC Networks
Aqua America Inc
Arrow Electronics Inc
ARRIS Group Inc
Associated Banc-Corp
Ashland Inc
Atmos Energy Corp
AptarGroup Inc
Avis Budget Group
Avnet Inc
Avon Products Inc
Bed Bath & Beyond
Brunswick Corp
Belden Inc
Sotheby's
Big Lots Inc
Bio-Rad Laboratories-A
Bioverativ
Black Hills Corp
Blackbaud
Bemis Company
Bank of Hawaii Corp
Broadridge Financial Solutions
Brocade Communications Systems
Brown & Brown Inc
Buffalo Wild Wings Inc
BancorpSouth Inc
CalAtlantic Group Inc
Cabela's Inc
Cable One Inc
Cheesecake Factory Inc
Cars.com Inc
Casey's General Stores
Cathay General Bancorp
Commerce Bancshares
Cabot Corp
Chemours
Care Capital Properties
CDK Global Inc
Cadence Design Sys Inc
Cullen/Frost Bankers Inc
Cognex Corporation
Churchill Downs Inc
Chemical Financial Corp
Ciena Corp
Core Laboratories
CoreLogic
Clean Harbors Inc
Mack-Cali Realty Corporation
Commercial Metals Company
Compass Minerals International Inc.
Cinemark Holdings Inc
CNO Financial Group
Coherent, Inc.
CyrusOne
Copart, Inc.
Camden Property Trust
Crane Co.
Cree Inc
Carter's, Inc.
Charles River Laboratories
Carpenter Technology
Cirrus Logic Inc
Consol Energy
Carlisle Companies Inc.
Cooper Tire & Rubber Company
Catalent Inc
Cousins Properties Inc
Convergys Corp
CommVault Systems
CoreCivic
Curtiss-Wright Corp
Cracker Barrel
Cypress Semiconductor Corp
Dana Incorporated
Diebold Inc
Donaldson Co
DCT Industrial Trust Inc
3D Systems Corp
Dillard's Inc
Deckers Outdoor Corporation
Douglass Emmett Inc
Dean Foods Co
Dick's Sporting Goods Inc
Deluxe Corporation
Dun & Bradstreet Corp
Dunkin' Brands Group Inc
NOW Inc
Diamond Offshore Drilling
Domino's Pizza Inc
Dril-Quip
DST Systems
DeVry Education Group
Dycom Industries Inc
Brinker International Inc
Education Realty Trust Inc.
Energen
Emcor
Endo International
Energizer Holdings Inc
EnerSys
Edgewell Personal Care Company
EPR Properties
Esterline Technologies
Ensco plc
Eaton Vance Corp
East West Bancorp Inc
Eagle Materials Inc
First American Financial Corp
FTI Consulting, Inc.
FactSet Research Systems Inc
First Horizon National Corp
Fair Isaac Corporation
Federated Investors
Flowers Foods Inc.
First Industrial Realty Trust
FNB Corporation
First Solar
Fortinet
Frontier Communications
Fulton Financial Corporation
GATX Corp.
Greif, Inc.
GEO Group Inc.
Graco Inc.
Graham Holdings Company
GameStop Corp.
Globus Medical Inc.
Gentex Corp.
Genworth Financial
Gulfport Energy Corp
Granite Construction Inc.
Genesee & Wyoming
Great Plains Energy Inc.
Hain Celestial Group
Hancock Holding Company
Hawaiian Electric Industries
Helen of Troy Limited
HollyFrontier Corporation
Huntington Ingalls Industries Inc.
Highwoods Properties
HealthSouth Corporation
HNI Corporation
Home BancShares Inc
Hospitality Properties Trust
Healthcare Realty Trust
Hill-Rom Holdings Inc.
HSN Inc
Hubbell Incorporated
Halyard Health
Intl Bancshares Corp
Idacorp Inc.
InterDigital Inc.
Integrated Device Technology
IDEX Corp
INC Research Holdings Inc
Ingredion Inc
World Fuel Services Corp
IPG Photonics
International Speedway Corporation
ITT Inc
Jack in the Box Inc.
JBG SMITH Properties
Jabil Circuit Inc
Janus Henderson
JetBlue Airways Corp
j2 Global Inc.
Jack Henry & Associates Inc
Jones Lang Lasalle Inc
John Wiley & Sons Inc. 'A'
KB Home
KBR Inc
Kirby Corporation
Keysight Technologies Inc
KLX Inc
Kemper Corporation
Kennametal Inc
Knowles Corp
Knight Transportation
Kilroy Realty Corp
Lamar Advertising Co-A
Lancaster Colony Corp
Leidos Holdings Inc
Lincoln Electric Holdings Inc
Littelfuse Inc
LaSalle Hotel Properties
Lennox International Inc
LivaNova
Legg Mason Inc
Snyder's-Lance
LogMeIn
LifePoint Health
Liberty Property Trust
Louisiana-Pacific Corp
Life Storage Inc
Landstar System Inc
Lamb Weston Holdings Inc
Live Nation Entertainment
ManpowerGroup
Manhattan Associates Inc.
Masimo
MB Financial Inc.
Mercury General Corp
MEDNAX Inc
Meredith Corp
Allscripts Healthcare Solutions Inc
Medidata Solutions
MDU Resources Group Inc
The Michaels Companies Inc
MarketAxess Holdings
Miller, Herman Inc
Maximus Inc
Mallinckrodt
Molina Healthcare Inc
Medical Properties Trust Inc
Monolithic Power Systems Inc
MSA Safety Inc
Microsemi Corp
MSCI Inc
MSC Industrial Direct A
Matador Resources
Minerals Technologies Inc
Murphy Oil
Murphy USA Inc
National Instruments Corp
Nabors Industries Ltd
NCR Corp
Nordson Corp
NewMarket Corporation
National Fuel Gas
New Jersey Resources
National Retail Properties Inc
NeuStar, Inc.
NetScout Systems
Nu Skin Enterprises
NuVasive Inc
NVR Inc
NorthWestern Corporation
New York Community Bancorp Inc
New York Times Company
Orbital ATK Inc
Old Dominion Freight Line
Office Depot Inc
Corporate Office Properties Trust
OGE Energy Corp
ONE Gas
Omega Healthcare Investors
Oceaneering Intl Inc
Oil States International
Olin Corp.
Owens-Illinois
Owens & Minor Inc
Old Republic International
Oshkosh Corporation
Bank of the Ozarks
PacWest Bancorp
PBF Energy Inc
Verifone
Prosperity Bancshares Inc
Prestige Brands Holdings Inc
Pitney Bowes
Potlatch Corp
Polaris Industries Inc
Plantronics Inc
PNM Resources
PolyOne Corp
Pool Corp
Post Holdings Inc
Primerica Inc
PAREXEL International Corp
PTC Inc
Patterson-UTI Energy
Papa John’s International Inc
Quality Care Properties
QEP Resources Inc
Ryder System
Regal Beloit Corp
Rowan Companies
Everest Re Group Ltd
Reinsurance Group of America
Royal Gold Inc
Transocean
RenaissanceRe Holdings Ltd
Rollins Inc.
RPM International Inc
Reliance Steel & Aluminum Co.
Rayonier Inc
Sabre Corp
Science Applications Intl Corp
Boston Beer Company
Sally Beauty Holdings Inc
Signature Bank
Service Corp Intl
SEI Investments Corp
Stifel Financial Corp
Sprouts Farmers Market
SVB Financial Group
Tanger Factory Outlet Centers Inc
Skechers USA Inc
Silicon Laboratories Inc
Silgan Holdings Inc
SLM Corp
SM Energy Co
Scotts Miracle-Gro Company
Senior Housing Properties Trust
Synovus Financial Corp (GA)
SYNNEX Corporation
Sonoco Products Co
Superior Energy Services Inc
STERIS plc
Steel Dynamics Inc
Southwestern Energy Co.
Southwest Gas Corp
Sensient Technologies Corp
Synaptics
TCF Financial Corp (MN)
Texas Capital Bancshares
Taubman Centers
Teradata
Telephone & Data Systems Inc
Teledyne Technologies Inc
Tech Data Corp
Bio-Techne
Teradyne
Terex Corp
Teleflex Inc
Tegna, Inc.
Tenet Healthcare Corp
Hanover Insurance Group Inc
Thor Industries Inc
TreeHouse Foods
Timken Co
Toll Brothers Inc
TRI Pointe Group
Tempur Sealy International
Tootsie Roll Industries Inc
Trimble Inc
Trustmark Corp (MS)
Trinity Industries Inc
Toro Company
Take-Two Interactive Software
Tupperware Corp
Texas Roadhouse
Tyler Technologies Inc
United Bankshares Inc
Urban Edge Properties
Domtar Corp
UGI Corp
Ultimate Software Group Inc
UMB Financial Corp.
Umpqua Holdings Corporation
United Natural Foods Inc
United Therapeutics Corp
Uniti Group
Urban Outfitters
Valley National Bancorp
Valmont Industries Inc
Valvoline Inc
VCA Antech Inc
Vectren Corp
Versum Materials Inc
ViaSat Inc
Vishay Intertechnology Inc
W.R. Berkley Corp
Wabtec
Washington Federal Inc.
WebMD Health Corp
Webster Financial Corp (CT)
Wellcare Health Plans Inc
Wendy's Company
Werner Enterprises Inc
WEX Inc.
WGL Holdings Inc.
Worthington Industries
Washington Prime Group Inc
WPX Energy
Westar Energy Inc
Weingarten Realty Investors
Williams-Sonoma Inc
Watsco Inc
West Pharmaceutical Services
Wintrust Financial Corp
Woodward Inc
United States Steel Corporation
Zebra Technologies Corp