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Mechel PAO, together with its subsidiaries, engages in mining, steel, and power businesses in Russia, Asia, Europe, the Commonwealth of Independent States, and internationally. The Mining segment produces and sells coking and steam coals, middlings, coke and chemical products, and iron ore concentrate. The Steel segment produces and sells semi-finished steel products; carbon and specialty long products; carbon and stainless flat products; and value-added downstream metal products, including forgings, stampings, hardware, rails, and ferrosilicon. The Power segment generates and supplies electricity and heat power to the third parties. It also provides transportation and freight services. The company was formerly known as Mechel OAO and changed its name to Mechel PAO in March 2016. Mechel PAO was incorporated in 2003 and is based in Moscow, Russia.

PowerShares Dynamic Semiconductors Portfolio (the Fund) seeks investment results that correspond generally to the price and yield of the Dynamic Semiconductors Intellidex Index (the Index). The Index is designed to provide capital appreciation by evaluating companies based on a variety of investment merit criteria, including fundamental growth, stock valuation, investment timeliness and risk factors. The Index consists of stocks of 30 United States semiconductors companies. These are companies that are principally engaged in the manufacture of semiconductors. These companies include companies involved in all aspects of the electronics business and in new technologies or specialty areas, including advanced design and manufacturing technologies, and lasers and electro-optics. The Fund will normally invest at least 90% of its total assets in common stocks that comprise the Index. The Fund's investment advisor is Invesco PowerShares Capital Management LLC.

SES AI Corporation engages in the development and production of high-performance Lithium-metal rechargeable batteries for electric vehicles, electric vehicle take-off and landing, and other applications. The company was founded in 2012 and is headquartered in Woburn, Massachusetts.

Trican Well Service Ltd., an equipment services company, provides various specialized products, equipment, services, and technology for use in the drilling, completion, stimulation, and reworking of oil and gas wells primarily in Canada. The company offers cementing solutions, including pre-flushes and spacers, cement plugs, lost circulation, cement design, and laboratory solutions, as well as surface, intermediate, production, liner, horizontal, and remedial/squeeze cementing services. It also provides hydraulic fracturing solutions, such as friction reducers, crosslinked gels, energized foam systems, visco-elastic systems, and high-rate nitrogen for coal bed methane fracturing and gelled hydrocarbons, as well as dissolvable ball sealers and diverting agents; and coiled tubing solutions comprising milling services, including fracturing plugs and ports, stage tool/debris subs, cement milling, and confirmation runs; coiled tubing fracturing; e-coil; in-house engineering; and acidizing and production enhancement services. In addition, the company offers fracture acidizing and production enhancement services that include restore well performance blockages from inorganic scales, emulsions, drilling mud, formation fines, clays, and organic deposits; nitrogen services; and engineering support, reservoir expertise, and laboratory services, as well as engages in the chemical sales. Trican Well Service Ltd. was incorporated in 1979 and is headquartered in Calgary, Canada.

Willbros Group, Inc. is a specialty energy infrastructure contractor serving the oil and gas and power industries with offerings that primarily include construction, maintenance and facilities development services. The Company operates through three segments: Oil & Gas, Utility T&D and Canada. The Company provides services through operating subsidiaries. The Company's segments operated primarily in the United States and Canada. The Company provides construction, maintenance and lifecycle extension services to the midstream markets. The Company provides a range of services in electric and natural gas transmission and distribution, including engineering, procurement, maintenance and construction, repair and restoration of utility infrastructure. It is engaged in construction, maintenance and fabrication, including integrity and supporting civil work, general mechanical and facility construction, application program interface (API) storage tanks, general and modular fabrication.