XERS 2021 Annual Report

Cautionary Statements for Forward-Looking Information This Annual Report on Form 10-K contains express or implied forward-looking statements that are based on our management’s belief and assumptions and on information currently available to our management. Although we believe that the expectations reflected in these forward-looking statements are reasonable, these statements relate to future events or our future operational or financial performance and involve known and unknown risks, uncertainties and other factors that may cause our actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by these forwardlooking statements. Forward-looking statements in this Annual Report on Form 10-K include, but are not limited to, statements about: • the rate and degree of market acceptance and clinical utility of Gvoke, Keveyis and Recorlev; • the pricing and reimbursement of Gvoke, Keveyis and Recorlev or any of our product candidates, if approved; • the effect of uncertainties related to the current coronavirus pandemic, or any other health epidemic, on U.S. and global markets, our business, financial condition, operations, third-party suppliers or the global economy as a whole; • our estimates regarding the market opportunities for Gvoke, Keveyis and Recorlev and our product candidates; • the commercialization, marketing and manufacturing of Gvoke, Keveyis and Recorlev and our product candidates, if approved; • our ability to manufacture, or the ability of third parties to deliver, sufficient quantities of components and drug product for commercialization of Gvoke, Keveyis and Recorlev or any of our product candidates, if approved; • our expectations related to the anticipated launch of Ogluo in certain European countries; • the rate and degree of market acceptance and clinical utility of any of our product candidates for which we receive marketing approval in the future; • the initiation, timing, progress and results of our research and development programs and future preclinical and clinical studies; • our ability to advance any other product candidates into, and successfully complete, clinical studies and obtain regulatory approval for them; • our ability to identify additional product candidates; • the implementation of our strategic plans for our business, product candidates and technology; • the scope of protection we are able to establish and maintain for intellectual property rights covering our product candidates and technology; • our ability to use the proceeds of our public offerings and borrowings in ways that increase the value of your investment; • our expectations related to the use of proceeds from our public offerings and borrowings and estimates of our expenses, future revenues, capital requirements and our needs for additional financing; • our ability to maintain and establish collaborations; • our financial performance; • our ability to effectively manage our anticipated growth; • developments relating to our competitors and our industry, including the impact of government regulation; and • other risks and uncertainties, including those listed under the section entitled “Risk Factors” (refer to Part 1, Item 1A, of this Annual Report on Form 10-K). In some cases, forward-looking statements can be identified by terminology such as "will," "would," “may,” “should,” “expects,” “intends,” “plans,” “anticipates,” “believes,” “estimates,” “predicts,” “potential,” “continue” and terms of similar meaning. These statements are only predictions. You should not place undue reliance on forward-looking statements because they involve known and unknown risks, uncertainties and other factors, which are, in some cases, beyond our control and which could materially affect results. Factors that may cause actual results to differ materially from current expectations include, among other things, those listed under the section entitled “Risk Factors”. If one or more of these risks or uncertainties occur, or if our underlying assumptions prove to be incorrect, actual events or results may vary significantly from those implied or projected by the forward-looking statements. No forward-looking statement is a guarantee of future performance. While we may elect to update these forward-looking statements at some point in the future, we have no current intention of doing so except to the extent required by applicable law. You should therefore not rely on these forward-looking statements as representing our views as of any date subsequent to the date of this Annual Report on Form 10-K. 4

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