XERS 2021 Annual Report

prescriptions for emergency glucagon were written in 2021, or an 7% increase from 2020. In 2021, a total of approximately 1 million units of emergency glucagon products were dispensed in the United States, representing total sales of approximately $281 million. We commercially launched Ogluo in the United Kingdom through our commercialization partner, Tetris, in December 2021. Considering the European Economic Area, United Kingdom, and Switzerland, we estimate that there are an additional 5 million people with diabetes on insulin. However, annually there are only approximately 1.2M units of glucagon sold in the retail setting, which we believe indicates that the market for emergency glucagon products is significantly underpenetrated in the Territory. Commercial Strategy Our commercial strategy is to increase the number of prescribed and dispensed emergency glucagon products, specifically Gvoke, for people on insulin therapy. Our sales force is focused on driving awareness and adoption of Gvoke by healthcare professionals. We began the field launch of Gvoke PFS in January 2020, Gvoke HypoPen in July 2020 and Gvoke Kit in 2022. Our strategy for Gvoke includes the following: < Drive awareness, adoption and utilization of Gvoke. We plan to drive awareness and adoption of Gvoke to expand glucagon adoption. o Healthcare Professionals: We are targeting certified diabetes care and education specialists and high insulin and glucagon prescribing healthcare professionals. We are reaching these professionals using our field and inside sales teams. o Patients and Caregivers: We are activating patients through patient advocacy organizations and leveraging channels such as direct-to-consumer advertising, patient influencer content, digital presence, traditional off-line channels, social media and press coverage to drive awareness and communicate our value proposition to patients and caregivers. < Penetrate the market. We believe that the Gvoke market is currently significantly underpenetrated due to the lack of, and limitations in, previous treatment options. We have designed Gvoke to offer healthcare professionals, patients and caregivers a ready-to-use alternative that facilitates administration of the full dose of glucagon every time it is used. We believe this product offering, paired with our commercial focus, has the potential to grow the market in two ways: o Healthcare Professionals: In addition to certified diabetes care and education specialists and high insulin and glucagon prescribing healthcare professionals, we are targeting healthcare professionals who are high mealtime insulin prescribers but who are not high prescribers of glucagon. We are reaching these professionals using our field and inside sales teams. o Patients and Caregivers: We believe there are opportunities to activate patient and caregiver demand for Gvoke. Gvoke is designed as a ready-to-use solution for a segment of patients and caregivers who currently lack the confidence in administering traditional emergency glucagon kits and would rather rely on emergency responders for treatment. < Promote access. Of our target patient population, approximately 60% are commercially insured, approximately 20% are covered by Medicare and approximately 20% are covered by Medicaid and other government programs. We plan to continue our focus on promoting access to Gvoke. We believe that all patients should have access to potentially lifesaving products such as Gvoke. We have engaged with payors to more fully understand their drivers and barriers and convey the health and pharmacoeconomic value of Gvoke. < Impact of the ongoing COVID-19 pandemic. We believe that customer demand has been adversely impacted by the COVID-19 pandemic. Initially, we suspended in-person interactions by our sales and marketing personnel in healthcare settings. We are engaging with these customers remotely, via webinar programs and virtual meetings, as we seek to continue to support healthcare professionals and patient care. Some of our sales and marketing personnel began to reengage with a limited number of in-person interactions. However, with the resurgence of COVID-19 variants in early 2022, our ability to connect with our customers in person became much more limited and we quickly moved back to more remote interactions. In addition, several conferences and other programs at which we intended to market Gvoke have been postponed or transitioned to virtual meetings. Remote interactions may be less effective than in-person interactions. We have also revised our patient copay assistance program to offer a copay card with a buydown to $0 for commercially eligible patients in response to the COVID-19 pandemic. We have established a distribution channel in the United States for the commercialization of Gvoke, which is currently being sold primarily to wholesale pharmaceutical distributors, who, in turn, sell Gvoke to pharmacies and other customers. We use a third-party logistics provider for key services related to logistics, warehousing and inventory management, distribution, contract administration, order management and chargeback processing and accounts receivable management. Keveyis Keveyis (dichlorphenamide) is the first and only therapy approved in the United States to treat hyperkalemic, hypokalemic and related variants of PPP, a group of rare hereditary disorders that cause episodes of muscle weakness or paralysis. Overview of PPP PPP is a rare, genetic, neuromuscular disorder related to a defect in muscle ion channels with multiple variants and subtypes. The disease is characterized by episodes of muscle weakness and paralysis. It often interferes with daily activities and, as patients get older, it can lead to permanent muscle weakness. PPP may be localized (“focal”) or more widespread (“generalized”), and it often 11

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