Aflac, through its subsidiaries, provides financial protection to people worldwide. The company's principal business is supplemental health and life insurance products. The company's insurance business consists of two reporting segments: Aflac Japan, which are designed to help consumers pay for medical and nonmedical costs that are not reimbursed under Japan's national health insurance system; and Aflac U.S., which the insurance products to provide supplemental coverage for people who already have primary medical or primary insurance coverage. The Aflac Japan's insurance products includes of cancer insurance, and medical insurance; and Aflac U.S. products includes of accident insurance, among others.

Alcoa is a vertically integrated aluminum company comprised of bauxite mining, alumina refining, aluminum production (smelting, casting, and rolling), and energy generation. Through direct and indirect ownership, the company has 30 operating locations in nine countries around the world, situated primarily in Australia, Brazil, Canada, Iceland, Norway, Spain, and United States.

Amplify Energy is a holding company. Through its wholly-owned subsidiary, Midstates Petroleum Company LLC, the company is an independent exploration and production company focused on the application of drilling, completion and production operations techniques in oil and liquids basins in the onshore U.S. The company's operations are focused on exploration and production activities in the Mississippian Lime. The company's Mississippian Lime assets are located in Oklahoma and target the Mississippian Lime formation.

Arch Coal is a coal producer. The company's main business is the production of thermal and metallurgical coal from surface and underground mines located throughout the United Staets, for sale to utility, industrial and steel producers both in the United States and around the world. The company's segments are based on two lines of business, metallurgical coal and thermal coal, and may include a number of mine complexes. The company's segments are: the Powder River Basin, containing primary thermal operations in Wyoming; the Metallurgical, containing metallurgical operations in West Virginia; and the Other Thermal, containing supplementary thermal operations in Colorado and Illinois.

Archer Daniels Midland is a human and animal nutrition and an agricultural origination and processing company. The company has three segments: Ag Services and Oilseeds, which includes activities related to the origination, merchandising, transportation, and storage of agricultural raw materials, and the crushing and further processing of oilseeds such as soybeans and soft seeds into vegetable oils and protein meals; Carbohydrate Solutions, which is engaged in corn and wheat wet and dry milling and other activities; and Nutrition, which engages in the manufacturing, sale, and distribution of an array of products including plant-based proteins, natural flavor ingredients, and flavor systems.

Archrock is an energy infrastructure company with a pure-play focus on midstream natural gas compression. The company is the provider of natural gas compression services to customers in the oil and natural gas industry and a supplier of aftermarket services to customers that own compression equipment. The company has two primary business segments: Contract Operations, which provides contract operations services, including the personnel, equipment, tools, materials and supplies to meet its customers' natural gas compression needs; and Aftermarket Services, which sells parts and components and provides operation, maintenance, overhaul and reconfiguration services to customers who own compression equipment.

Caledonia Mining Corporation is engaged in the acquisition, exploration and development of mineral properties for the exploitation of base and precious metals focused on Southern Africa. Co.'s primary asset is a 49% interest in the Blanket Mine in Zimbabwe which produced over 50,351 ounces of gold in 2016. Its segments include Corporate, Zimbabwe, and South Africa. The Corporate segment includes administrative functions within the group. The Zimbabwe segment comprise Caledonia Holdings Zimbabwe Ltd. and subsidiaries. The South Africa segment comprises a gold mine, that is on care and maintenance, as well as sales made by Caledonia Mining South Africa Proprietary Limited to the Blanket Mine.

CBIZ provides business services, products and solutions to manage finances and employees. These services are provided to primarily small and midsized businesses, as well as individuals, governmental entities and not-for-profit enterprises. The company provides its services through three groups: Financial Services, which provides accounting and tax, government healthcare consulting, financial advisory, valuation and risk advisory services; Benefits and Insurance Services, which provides group health benefits consulting, payroll, property and casualty, and retirement plan services; and National Practices, which provides managed networking and hardware services, as well as healthcare consulting.

Cigna is a global health service organization. The company's segments are: Integrated Medical, which includes its employer-sponsored medical coverage and Medicare offerings for seniors and individual insurance offerings to non-seniors both on and off the public health insurance exchanges; Health Services, which consists of the pharmacy benefit management and certain health management services; International Markets, which provides a range of medical and supplemental health, life, and accident benefits to individuals and employers; and Group Disability and Other, which includes its commercial long- and short-term disability products, and its term life group insurance products.

Cosmo Pharmaceuticals N.V. is a specialty pharmaceutical company. The Company develops therapies for gastrointestinal disorders. The Company's clinical development pipeline specifically addresses treatments for inflammatory bowel diseases, colorectal cancer diagnosis and colonoscopy. It has developed a medical device for polyp excision and is developing a product for the detection of colon cancer. Its pipeline includes Lialda/Mezavant/Mesavancol, which is indicated for mild to moderate ulcerative colitis; Uceris/Cortiment, which is indicated for mild to moderate ulcerative colitis; Zacol NMX, which is indicated for intestinal disorders; Rifamycin SV MMX, which is indicated for Travelers' Diarrhea and uncomplicated diverticulitis, among others; CB-17-01, which is indicated for chromoendoscopy for colorectal cancer prevention in surveillance patients; CB-17-04, which is a sub mucosal injectable composition, and CB-01-12, which is an antibody anti-tumor necrosis factor (TNF) alpha drug.

CryoLife is engaged in the manufacturing, processing, and distribution of medical devices and implantable human tissues used in cardiac and vascular surgical procedures for patients with aortic disease. The company has the following product families: BioGlue? Surgical Adhesive products, JOTEC stent grafts and surgical products, On-X mechanical heart valves and surgical products, and implantable cardiac and vascular human tissues. The company's medical devices and preservation services are primarily used by cardiac and vascular surgeons to treat patients with aortic disease, including heart valve disease, and to a lesser extent, other conditions in cardiac and vascular surgery.

Curtiss-Wright is a manufacturing and service company that designs, manufactures, and overhauls components and provides engineered products and services. The company's segments are: Commercial/Industrial, which provides engineered products and services including industrial vehicle products, sensors, valves and surface technology services; Defense, which provides Commercial Off-the-Shelf embedded computing board-level modules, integrated subsystems, instrumentation and control systems, turret aiming and stabilization products, and weapons handling systems; and Power, which provides hardware, pumps, valves, fastening systems, containment doors, airlock hatches, and spent fuel management products.

CVR Energy is a holding company. The company is engaged in the petroleum refining and nitrogen fertilizer manufacturing industries through its holdings in CVR Refining, LP (CVR Refining) and CVR Partners, LP (CVR Partners). CVR Refining is an independent petroleum refiner and marketer of transportation fuels. CVR Partners produces and markets nitrogen fertilizers in the form of urea ammonium nitrate and ammonia. The company's segments include: Petroleum, which includes refineries located in Coffeyville, KS and Wynnewood, OK and supporting logistics assets in the region; and Nitrogen Fertilizer, which includes nitrogen fertilizer manufacturing facilities located in Coffeyville, KS and East Dubuque, IL.

DaVita is a healthcare provider focused on transforming care delivery to improve quality of life for patients. The company's United States dialysis business provides kidney dialysis services for patients suffering from end stage renal disease (ESRD). The company's dialysis services include outpatient hemodialysis services, hospital inpatient hemodialysis services, home-based dialysis services, ESRD laboratory services, and management services. The company's ancillary services and strategic initiatives businesses include disease management services, physician services, ESRD Seamless Care Organization joint ventures, clinical research programs, vascular access services, as well as international dialysis operations.

Exelixis is an oncology-focused biotechnology company that involved in the discovery, development and commercialization of new medicines for cancers. The company's marketd products are: CABOMETYX? (cabozantinib) tablets for renal cell carcinoma and previously treated hepatocellular carcinoma; and COMETRIQ? (cabozantinib) capsules for progressive, metastatic medullary thyroid cancer. The company's products resulting from its discovery efforts are: COTELLIC? (cobimetinib), an inhibitor of MEK approved as part of a combination regimen to treat melanoma; and MINNEBRO? (esaxerenone), an oral, non-steroidal, selective blocker of the mineralocorticoid receptor approved for the treatment of hypertension in Japan.

Gogo is a holding company. Through its operating subsidiaries, the company is a provider of in-flight broadband connectivity and wireless entertainment services. The company's segments are: Commercial Aviation North America, which provides air-to-ground and satellite connectivity and entertainment services to commercial aircraft flying routes within North America; Commercial Aviation Rest of World, which provides satellite connectivity and entertainment services to commercial aircraft flying routes outside of North America; and Business Aviation, which provides integrated equipment, network and Internet connectivity products and services to the business aviation market.

Huntington Ingalls Industries is a military shipbuilding company and a provider of services to partners in government and industry. The company's segments include: Ingalls Shipbuilding, which designs and constructs non-nuclear ships for the United States Navy and United States Coast Guard, including amphibious assault ships, expeditionary warfare ships, surface combatants, and national security cutters; Newport News Shipbuilding, which is designing and constructing nuclear-powered ships, such as aircraft carriers and submarines, and the refueling and overhaul and the inactivation of such ships; and Technical Solutions, which includes businesses that are focused on life-cycle sustainment services.

Liberty Oilfield Services is a provider of hydraulic fracturing services to onshore oil and natural gas exploration and production companies in North America. The company provides its services primarily in the Permian Basin, the Eagle Ford Shale, the Denver-Julesburg Basin, the Williston Basin and the Powder River Basin.

Magellan Midstream Partners is engaged in the transportation, storage and distribution of refined petroleum products and crude oil. The company's segments are: refined products, which consists of its refined products pipeline system, independent terminals and ammonia pipeline system; crude oil, which comprises crude oil pipelines, condensate splitter and storage facilities and ships crude oil as a common carrier for customers including crude oil producers, end users such as refiners, and marketing and trading companies; and marine storage, which owns and operates marine storage terminals located along coastal waterways.

MetLife, through its subsidiaries and affiliates, provides insurance, annuities, employee benefits and asset management. The company's segments include: United States; Asia; Latin America; Europe, the Middle East and Africa; and MetLife Holdings. In the United States, the company provides a variety of insurance and financial services products, including life, dental, disability, property and casualty, guaranteed interest, stable value and annuities to both individuals and groups. Outside the United States, the company provides life, medical, dental, credit and other accident and health insurance, as well as annuities, endowment and retirement and savings products to both individuals and groups.

Mosaic is a producer and marketer of concentrated phosphate and potash crop nutrients. The company is organized into three reportable business segments: Phosphates, which owns and operates mines and production facilities in Florida that produce concentrated phosphate crop nutrients and phosphate-based animal feed ingredients, and processing plants in Louisiana that produce concentrated phosphate crop nutrients; Potash, which mines and processes potash in Canada and the United States and sells potash in North America and internationally; and Mosaic Fertilizantes, which produces and sells concentrated phosphates crop nutrients, phosphate-based animal feed ingredients and potash fertilizer.

Nucor manufactures steel and steel products. The company's operations include international trading and sales companies that buy and sell steel and steel products. The company's segments are: steel mills, which produces sheet steel, plate steel, structural steel, and bar steel; steel products, which produces hollow structural section steel tubing, electrical conduit, steel joists and joist girders, steel deck, cold finished steel, steel fasteners, metal building systems, and wire and wire mesh; and raw materials, which produces direct reduced iron (DRI), brokers ferrous and nonferrous metals, pig iron, hot briquetted iron and DRI, supplies ferro-alloys, and processes ferrous and nonferrous scrap metal.

Packaging Corporation of America is a producer of containerboard products and a producer of uncoated freesheet paper. The company's segments include: Packaging, which produces a variety of corrugated packaging products, including shipping containers, multi-color boxes and displays, and honeycomb protective packaging, as well as produces packaging for meat, fresh fruit and vegetables, processed food, beverages, and other industrial and consumer products; Paper, which manufactures and sells papers, including both commodity and specialty papers; and Corporate and Other, which includes transportation assets, such as rail cars and trucks, to transport the company's products to and from its manufacturing sites.

PDC Energy is an independent exploration and production company that acquires, explores and develops properties for the production of crude oil, natural gas, and natural gas liquids with operations in the Wattenberg Field in Colorado and the Delaware Basin in Texas. The company's operations in the Wattenberg Field are focused in the horizontal Niobrara and Codell plays and its Delaware Basin operations are primarily focused in the Wolfcamp zones. The company is engaged in two operating segments: its oil and gas exploration and production segment and its gas marketing segment.

ProPetro Holding is a holding company. Through its subsidiary, the company is engaged as an oilfield services company providing hydraulic fracturing and other services to upstream oil and gas companies engaged in the exploration and production of North American unconventional oil and natural gas resources. The company's operations are primarily focused in the Permian Basin. In addition to its core hydraulic fracturing operations, the company provides complementary well completion and production services, including cementing, coiled tubing, flowback services and drilling. The company conducts its business through five segments: hydraulic fracturing (inclusive of acidizing), cementing, coil tubing, flowback and drilling.

Schnitzer Steel Industries is engaged as a recycler of ferrous and nonferrous scrap metal, including end-of-life vehicles, and a manufacturer of finished steel products. The company has two segments: Auto and Metals Recycling, which acquires and recycles ferrous and nonferrous scrap metal for sale to foreign and domestic metal producers, processors and brokers, and procures salvaged vehicles and sells serviceable used auto parts from these vehicles through a network of self-service auto parts stores; and Cascade Steel and Scrap, which produces a range of finished steel long products using ferrous recycled scrap metal and other raw materials.

Strategic Education is an education services company. The company provides campus-based and online post-secondary education offerings through two subsidiaries, Strayer University and Capella University. Strayer University provides undergraduate and graduate degree programs in business administration, accounting, information technology, education, health services administration, nursing, public administration, and criminal justice at physical campuses, primarily located in the eastern U.S., and online. Capella University is an online post-secondary education company that provides a variety of bachelor's, master's and doctoral degree programs primarily delivered to working adults.

SunCoke Energy is an independent producer of coke. The company owns and operates a logistics business that provides handling and/or mixing services to steel, coke (including some of its domestic cokemaking facilities), electric utility, coal producing and other manufacturing based customers. The company's segments are: Domestic Coke, which consists of Jewell, Indiana Harbor, Haverhill, Granite City, and Middletown facilities; Brazil Coke, which operates the ArcelorMittal Brasil S.A. cokemaking facility; and Logistics, which consists of Convent Marine Terminal, Kanawha River Terminal, SunCoke Lake Terminal, and Dismal River Terminal.

Tellurian is developing a portfolio of natural gas production, liquefied natural gas (LNG) marketing, and infrastructure assets that includes an LNG terminal facility (the Driftwood terminal), and three related pipelines (the Pipeline Network). The proposed Pipeline Network will consist of three pipelines, the Driftwood pipeline, the Haynesville Global Access Pipeline and the Permian Global Access Pipeline. The Driftwood pipeline interconnect with existing interstate pipelines throughout southwest Louisiana to secure adequate natural gas feedstock for the Driftwood terminal. The Driftwood pipeline will be comprised of pipeline segments and compressor stations.

TimkenSteel manufactures alloy steel, carbon and micro-alloy steel. The company's portfolio includes special bar quality (SBQ) bars, seamless mechanical tubing, solutions such as precision steel components, and billets. In addition, the company supplies machining and thermal treatment services, and the company manages raw material recycling programs. The company's products and services are used in the following market sectors: oil and gas; oil country tubular goods; automotive; industrial equipment; mining; construction; rail; aerospace and defense; heavy truck; agriculture; and power generation. The company's products include: SBQ Steel Bar, Seamless Mechanical Steel Tubes, and Billets; and Precision Products and Services.

United Natural Foods is a distributor of natural, organic, specialty, produce, and grocery and non-food products, and provider of support services in the United States and Canada. The company's selection of products includes nationally advertised brand name and private-label products, including grocery, general merchandise, home, health and beauty care, and pharmacy, which are sold through its Wholesale segment to wholesale customers and through its subsidiary, SUPERVALU INC.'s-operated retail stores to shoppers. The company provides marketing services for its customers and suppliers, including consumer and trade marketing programs, as well as programs to support suppliers in understanding its markets.