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Eargo, Inc., a medical device company, engages in enhancing the quality of life of people with hearing loss in the United States. It markets and sells hearing aids. The company sells its products direct-to-consumer and through omni-channel. The company was formerly known as Aria Innovations, Inc. and changed its name to Eargo, Inc. in November 2014. Eargo, Inc. was incorporated in 2010 and is headquartered in San Jose, California.

MSA Safety Incorporated develops, manufactures, and supplies safety products and technology solutions that protect people and facility infrastructures in the fire service, energy, utility, construction, and industrial manufacturing applications, as well as heating, ventilation, air conditioning, and refrigeration industries worldwide. The company's core product offerings include fixed gas and flame detection systems, such as gas detection monitoring systems, and flame detectors and open-path infrared gas detectors; breathing apparatus products, including self-contained breathing apparatus; hand-held portable gas detection instruments to detect the presence or absence of various gases in the air; industrial head protection products; firefighter helmets and protective apparel; and fall protection equipment, such as confined space equipment, harnesses, lanyards, and self-retracting lifelines, as well as engineered systems. In addition, the company offers air-purifying respirators, eye and face protection products, ballistic helmets, and gas masks. It serves distributors and end-users through indirect and direct sales channels. The company offers its products under the V-Gard, Cairns, and Gallet brand names. MSA Safety Incorporated was founded in 1914 and is based in Cranberry Township, Pennsylvania.

Shandong Weigao Group Medical Polymer Company Limited engages in the research and development, production, wholesale, and sale of medical devices in the People's Republic of China. It operates through Medical Device Products, Orthopaedic Products, Interventional Products, Pharma Packaging Products, Blood Management Products, and Others segments. The company offers vascular and non-vascular access infusion devices, infusion sets, syringes, puncture needles, specialized single-use clinical collection kits, digital products for clinical care, digestive nutrition, and primary care products; and general anesthesia consumables, local anesthesia consumables, anesthesia auxiliary consumables, ICU equipment, open and minimally invasive surgical equipment, wound healing dressings, wound suture, wound cleaning, and nonvascular catheter supporting extracorporeal devices. It also provides blood collection, irradiation, storage, separation, and sterilization products; blood collection and blood glucose testing devices; trauma, spinal implant, artificial joints, sports injury, soft tissue repair, reconstruction implant, orthopedic filling, and orthopedic related surgical tools; tumor intervention, vascular intervention, and interventional imaging; and prefilled syringes and pre-filled flush syringes. In addition, the company engages in the manufacturing of implantation materials and artificial organs; medical PVC granules, plastic packing bags, and carton boxes; industrial automatic equipment and parts; molds; hemodialysis equipment; and X-ray based irradiation machines. Further, it is involved in the finance leasing and factoring business; provision of asset management, enterprise consulting, enterprise management advisory services, logistics and storage, and computer technical services; and sale of electronic products. The company was incorporated in 2000 and is based in Weihai, the People's Republic of China.

Demant A/S operates as a hearing healthcare and audio technology company in Europe, North America, the Asia Pacific, Asia, and internationally. It operates through two segments: Hearing Healthcare and Communications. The Hearing Healthcare segment is involved in the manufacturing, servicing, and sale of hearing aids, and diagnostic products and services. The Communications segment provides headsets and solutions for the professional call centers, office markets, and gaming markets under the EPOS brand name. The company was formerly known as William Demant Holding A/S and changed its name to Demant A/S in March 2019. Demant A/S was founded in 1904 and is headquartered in Smørum, Denmark.