XERS 2021 Annual Report

studies with traditional kits, only 6% to 31% of users were able to successfully administer the full dose of glucagon. In other words, in these studies, test subjects failed to deliver the full dose of glucagon 69% to 94% of the time. Accordingly, a diabetes patient experiencing a severe hypoglycemic episode who relies on a bystander to administer glucagon may not receive the full dose of glucagon needed to restore their blood glucose levels. Failure to promptly treat severe hypoglycemia leaves the person at critical risk of irreversible brain damage and heart problems, especially in people who already have coronary artery disease. If emergency medical treatment is not successful, the severe hypoglycemic event can be fatal. Of the units of glucagon rescue products dispensed in the United States at the end of 2021, legacy kits and Baqsimi represented approximately 42% and 38%, respectively, Gvoke represented approximately 20% and Zegalogue represented less than 1%. Gvoke Key Features and Benefits Leveraging our patented XeriSol technology, we believe Gvoke offers an important advancement in the treatment of severe hypoglycemia. Gvoke is the first ready-to-use, room-temperature stable liquid glucagon product approved that can be administered via a pre-filled syringe (Gvoke PFS), auto-injector (Gvoke HypoPen) or single dose vial and syringe kit (Gvoke Kit). Gvoke is currently available in two doses: a 0.5 mg/0.1 mL dose for pediatric patients and a 1 mg/0.2 mL dose for adolescent and adult patients. These innovative formats are designed to provide the reliability of a ready-to-use liquid glucagon while allowing patients or caregivers to administer it quickly and simply. The key features of Gvoke PFS and Gvoke HypoPen are: < Ready-to-use: With its two-step administration process, the user of Gvoke HypoPen, pulls off the cap and pushes down on the skin for five seconds until the viewing window turns red, or with Gvoke PFS, pulls off the cap, inserts the needle at a 90-degree angle and pushes the plunger down as far as it will go. There is no reconstitution required at the time of emergency. < Reliable administration: In our human factors studies, 99% of users were able to successfully administer the full dose. < No dose calibration required: Gvoke is offered in two pre-measured doses: 0.5 mg/0.1 mL dose for pediatric patients and 1 mg/0.2 mL dose for adolescent and adult patients. < 24 to 30 months room-temperature stability: No refrigeration is required at any time. In addition, key features specific to the Gvoke HypoPen are: < No visible needle: The needle in the Gvoke HypoPen is not visible to the user. < Auto-retraction: The needle auto-retracts after administration for safety. < Auto-locks: The device auto-locks after use for safety. In our Caregiver and Patient Perceptions Study conducted in 2018, more than 75% of subjects responded that they would prefer Gvoke HypoPen over the then-existing traditionally available glucagon kits. Also in 2018, we conducted a quantitative study of over 400 healthcare professionals, which we refer to as our Healthcare Professional Perceptions Study. In that study, results indicated that glucagon would be prescribed to more people across all clinically appropriate patient segments if Gvoke HypoPen was available. Based on this market research, we believe that the glucagon market will become more penetrated and that Gvoke HypoPen will become the preferred emergency glucagon delivery solution to the existing traditionally available glucagon kits. Gvoke Market Potential Based on current market data as well as our Caregiver and Patient and Healthcare Professional Perceptions Studies, we believe that Gvoke has the opportunity to increase penetration of the glucagon market in severe hypoglycemia by increasing the number of people with diabetes who have a filled glucagon prescription and by increasing the number of glucagon rescue devices they have on hand. There are approximately 22 million drug-treated people with diabetes in the United States, and the annual growth rate in incidence of diagnosed and treated people with diabetes is approximately 4% per year. An additional 96 million people in the United States are prediabetic and may progress to T2D. The ADA recommends that glucagon be prescribed for all individuals at increased risk of Level 2 or Level 3 hypoglycemia so that it is available should it be needed. Based on our Healthcare Professional Perceptions Study, we believe all people on insulin are considered clinically appropriate for glucagon. In the United States, there is an estimated 1.6 million people with T1D who are treated with insulin because their bodies do not naturally produce insulin and approximately 5.4 million additional people with T2D who are treated with insulin because their bodies do not use insulin properly. In the aggregate, we estimate that the potential target population for emergency glucagon therapy totals approximately 7.0 million people in the United States. We believe every person who is on insulin therapy should have ready-to-use glucagon available for a potential severe hypoglycemic episode. With such an expansion in glucagon prescriptions, and also by increasing penetration into the market for emergency glucagon kits, the United States potential market opportunity may be up to $4.0 billion. Despite the risk of experiencing a severe hypoglycemic event, we believe that emergency glucagon therapy is under-appreciated, under-evaluated and under-taught, resulting in a market that is underpenetrated. In the United States, approximately 693,000 total 10

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