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Aptorum Group Limited, a biopharmaceutical company, engages in the discovery, development, and commercialization of therapeutic products for the treatment of infectious diseases and cancer. The company operates in the Therapeutics and Non-Therapeutics segments. Its pipeline products include SACT- 1 for neuroblastoma and other cancer types; SACT-COV19 for the treatment of coronavirus disease; ALS-4 to treat bacterial infections caused by staphylococcus aureus, including MRSA; and ALS-1 to treat viral infections caused by influenza virus A. The company is also developing ALS-2/3 for the treatment of gram+ve bacterial infections; RPIDD, a pathogen molecular diagnostic; NativusWell DOI (NLS-2), a dietary supplement; NLS-1 for the treatment of endometriosis; DLS-1+2 to treat NSCLC with mutation; DLS-3, an autoimmune small molecule; and CLS-1 for the treatment of obesity. Its pipeline products enable the discovery of new therapeutics assets, such as systematic screening of existing approved drug molecules, and microbiome-based research platforms for treatment of metabolic diseases. The company also focuses on therapeutic and diagnostic projects in neurology, gastroenterology, metabolic disorders, women's health, and other disease areas. In addition, it operates a medical clinic. The company was formerly known as APTUS Holdings Limited and changed its name to Aptorum Group Limited in October 2017. Aptorum Group Limited was incorporated in 2010 and is headquartered in London, the United Kingdom. Aptorum Group Limited is a subsidiary of Jurchen Investment Corporation.

MDC Partners Inc. provides marketing, advertising, activation, communications, and strategic consulting solutions worldwide. It offers a range of client services, including global advertising and marketing, data analytics and insights, mobile and technology experiences, direct marketing, business consulting, database and customer relationship management, sales promotion, corporate communications, market research, corporate identity, design and branding services, social media strategy and communications, product and service innovation, and e-commerce management, as well as media buying, planning, and optimization. The company was formerly known as MDC Corporation Inc. and changed its name to MDC Partners Inc. in January 2004. MDC Partners Inc. was founded in 1980 and is headquartered in New York, New York.

ProShares Ultra SmallCap600 (the Fund) seeks daily investment results that correspond to twice (200%) the daily performance of the S&P SmallCap 600 Index (the Index). The Fund intends to invest at least 80% of its net assets, including any borrowings for investment purposes, under normal circumstances, to equity securities contained in the Index and/or financial instruments that, in combination, have similar economic characteristics. The Fund also intends to invest assets not invested in financial instruments, in debt instruments and/or money market instruments. The Fund intends to concentrate its investments in a particular industry or group of industries to approximately the same extent as the Index is so concentrated. ProShare Advisors LLC serves as the investment advisor to the Fund.