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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.

North American Construction Group Ltd. provides mining and heavy civil construction services to customers in the resource development and industrial construction sectors in Australia, Canada, and the United States. The company operates Heavy Equipment - Canada, Heavy Equipment - Australia, and Other segments. It also offers mine management services for thermal coal mines; and construction and operations support services in the Canadian oil sands region. In addition, the company provides fully maintained heavy equipment rentals and full service mine operations support at metallurgical and thermal coal mines; heavy equipment rentals to iron ore, gold and lithium producers; and heavy equipment maintenance, component remanufacturing, and full equipment rebuild services to mining companies and other heavy equipment operators, as well as supplies production-critical components to the mining and construction industry. As of December 31, 2023, it operated a heavy equipment fleet of 900 units. The company was formerly known as North American Energy Partners Inc. and changed its name to North American Construction Group Ltd. in April 2018. North American Construction Group Ltd. was incorporated in 1953 and is headquartered in Acheson, Canada.

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.

TerraVest Industries Inc. manufactures and sells goods and services to energy, agriculture, mining, transportation, and other markets in Canada and the United States. It operates through four segments: Home Heating and Cooling Products (HVAC Equipment); Compressed Gas Storage and Distribution Equipment (Compressed Gas Equipment); Energy Processing Equipment (Processing Equipment); and Service. The HVAC Equipment segment manufactures and distributes commercial and residential refined fuel tanks, furnaces, boilers, and air conditioning equipment and controls to fuel distributors, commercial and residential consumers. The Compressed Gas Equipment segment manufactures and sells engineered products for the storage, distribution and dispensing of compressed gases including liquid propane gas, natural gas liquids, liquified natural gas, anhydrous ammonia, carbon dioxide, and various gases; and bulk storage vessels, transport trailers, delivery units, dispensers, commercial and residential storage tanks, and other custom vessels. This segment sells its products to gas distributors, fertilizer distributors, farmers, midstream energy companies, and transportation companies. The Processing Equipment segment manufactures and sells a range of equipment, such as wellhead processing equipment and tanks, desanding units, biogas production equipment, water treatment equipment, and various custom process equipment. This segment offers its products to oil and gas producers, midstream and engineering companies, utilities, and municipalities. The Service segment provides water management, environmental, heating, rentals, and well services. The company was formerly known as TerraVest Capital Inc. and changed its name to TerraVest Industries Inc. in February 2018. TerraVest Industries Inc. was founded in 2004 and is headquartered in Vegreville, Canada.