Aug 8, 2023

ADCT-601 (targeting AXL) ADCT-602 (targeting CD22) Second Quarter 2023 Financial Results Cash and Cash Equivalents Cash and cash equivalents were $347.5 million as of June 30, 2023, compared to $326.4 million as of December 31, 2022. In June 2023, the Company received a $75.0 million milestone payment from Healthcare Royalty Partners, triggered by the first EU commercial sale. The Company expects its cash runway to extend into the middle of 2025. Product Revenues Net product revenues were $19.2 million for the quarter ended June 30, 2023, compared to $17.3 million for the same quarter in 2022. Net product revenues are for U.S. sales of ZYNLONTA. The increase of $1.9 million for the quarter was primarily due to higher sales volume, partially offset by higher gross-to-net deductions. Research and Development (R&D) Expenses R&D expenses were $31.9 million for the quarter ended June 30, 2023, compared to $48.5 million for the same quarter in 2022. R&D expenses decreased due to less investment in Cami (camidanlumab tesirine) due to the completion of the Phase 2 study in 2022 and the Company’s decision to seek a partner to progress the program, as well as less investment in other development programs. R&D expenses in the second quarter of 2023 also decreased due to lower share-based compensation expense as a result of fluctuations in the share price, voluntary terminations and the reduction in workforce implemented in May 2023 creating organizational efficiencies. These efficiencies allowed the Company to enhance investments in prioritized portfolio programs. Selling and Marketing (S&M) Expenses S&M expenses were $14.5 million for the quarter ended June 30, 2023, compared to $17.7 million for the same quarter in 2022. The decrease in S&M expenses for the quarter was primarily due to lower share-based compensation expense resulting from fluctuations in the share price and award forfeitures in connection with voluntary terminations and the commercial realignment implemented in the second quarter. General & Administrative Expenses G&A expenses were $11.4 million for the quarter ended June 30, 2023, compared to $18.2 million for the same quarter in 2022. G&A expenses decreased during the second quarter of 2023 primarily due to lower share-based compensation expense due to fluctuations in the share price, transition of a board member, voluntary terminations and the workforce reduction implemented in May 2023. Net Loss and Adjusted Net Loss Net loss was $47.1 million, or a net loss of $0.58 per basic and diluted share, for the quarter ended June 30, 2023. This compares to a net loss of $64.4 million, or a net loss of $0.84 per basic and diluted share, for the same quarter in 2022. Adjusted net loss was $30.3 million, or an adjusted net loss of $0.37 per basic and diluted share, for the quarter ended June 30, 2023. This compares to an adjusted net loss of $56.3 million, or an adjusted net loss of $0.73 per basic and diluted share, for the same quarter in 2022. The decrease in net loss and adjusted net loss for the quarter ended June 30, 2023, as compared to the same quarter in 2022, was attributable to lower R&D expenses and higher product revenues during the second quarter of 2023. The decrease in net loss was also attributable to lower share-based compensation expense, partially offset by other financial expense arising from a cumulative catch-up adjustment associated with the valuation of the deferred royalty obligation with Healthcare Royalty Partners recognized in the second quarter of 2023 and from changes in the fair value of our convertible loan derivatives, which was recognized in the second quarter of 2022. Conference Call Details ADC Therapeutics management will host a conference call and live audio webcast to discuss second quarter 2023 financial results and provide a company update today at 8:30 a.m. Eastern Time. To access the conference call, please register here . Registrants will receive the dial-in number and unique PIN. It is recommended that you join 10 minutes before the event, though you may pre-register at any time. A live webcast of the call will be available under “Events & Presentations” in the Investors section of the ADC Therapeutics website at ir.adctherapeutics.com . The archived webcast will be available for 30 days following the call. About ZYNLONTA® (loncastuximab tesirine-lpyl) ZYNLONTA® is a CD19-directed antibody drug conjugate (ADC). Once bound to a CD19-expressing cell, ZYNLONTA is internalized by the cell, where enzymes release a pyrrolobenzodiazepine (PBD) payload. The potent payload binds to DNA minor groove with little distortion, remaining less visible to DNA repair mechanisms. This ultimately results in cell cycle arrest and tumor cell death. The U.S. Food and Drug Administration (FDA) and the European Medicines Agency (EMA) have approved ZYNLONTA (loncastuximab tesirine-lpyl) for the treatment of adult patients with relapsed or refractory (r/r) large B-cell lymphoma after two or more lines of systemic therapy, including diffuse large B-cell lymphoma (DLBCL) not otherwise specified (NOS), DLBCL arising from low-grade lymphoma and also high-grade B-cell lymphoma. The trial included a broad spectrum of heavily pre-treated patients (median three prior lines of therapy) with difficult-to-treat disease, including patients who did not respond to first-line therapy, patients refractory to all prior lines of therapy, patients with double/triple hit genetics and patients who had stem cell transplant and CAR-T therapy prior to their treatment with ZYNLONTA. This indication is approved by the FDA under accelerated approval and in the European Union under conditional approval based on overall response rate and continued approval for this indication may be contingent upon verification and description of clinical benefit in a confirmatory trial. ZYNLONTA is also being evaluated as a therapeutic option in combination studies in other B-cell malignancies and earlier lines of therapy. About ADC Therapeutics ADC Therapeutics (NYSE: ADCT) is a commercial-stage biotechnology company improving the lives of those affected by cancer with its next-generation, targeted antibody drug conjugates (ADCs). The Company is advancing its proprietary PBD-based ADC technology to transform the treatment paradigm for patients with hematologic malignancies and solid tumors. ADC Therapeutics’ CD19-directed ADC ZYNLONTA (loncastuximab tesirine-lpyl) is approved by the FDA for the treatment of relapsed or refractory diffuse large b-cell lymphoma after two or more lines of systemic therapy. ZYNLONTA is also in development in combination with other agents. In addition to ZYNLONTA, ADC Therapeutics has multiple ADCs in ongoing clinical and preclinical development. ADC Therapeutics is based in Lausanne (Biopôle), Switzerland and has operations in London, the San Francisco Bay Area and New Jersey. For more information, please visit https://adctherapeutics.com/ and follow the Company on Twitter and LinkedIn . ZYNLONTA® is a registered trademark of ADC Therapeutics SA. Use of Non-IFRS Financial Measures In addition to financial information prepared in accordance with IFRS, this document also contains certain non-IFRS financial measures based on management’s view of performance including: Adjusted net loss Adjusted net loss per share Management uses such measures internally when monitoring and evaluating our operational performance, generating future operating plans and making strategic decisions regarding the allocation of capital. We believe that these adjusted financial measures provide useful information to investors and others in understanding and evaluating our operating results in the same manner as our management and facilitate operating performance comparability across both past and future reporting periods. These non-IFRS measures have limitations as financial measures and should be considered in addition to, and not in isolation or as a substitute for, the information prepared in accordance with IFRS. When preparing these supplemental non-IFRS measures, management typically excludes certain IFRS items that management does not believe are indicative of our ongoing operating performance. Furthermore, management does not consider these IFRS items to be normal, recurring cash operating expenses; however, these items may not meet the IFRS definition of unusual or non-recurring items. Since non-IFRS financial measures do not have standardized definitions and meanings, they may differ from the non-IFRS financial measures used by other companies, which reduces their usefulness as comparative financial measures. Because of these limitations, you should consider these adjusted financial measures alongside other IFRS financial measures. The following items are excluded from adjusted net loss and adjusted net loss per share: Shared-Based Compensation Expense: We exclude share-based compensation expense from our adjusted financial measures because share-based compensation expense, which is non-cash, fluctuates from period to period based on factors that are not within our control, such as our stock price on the dates share-based grants are issued. Share-based compensation expense has been, and will continue to be for the foreseeable future, a recurring expense in our business and an important part of our compensation strategy. Certain Other Items: We exclude certain other significant items that we believe do not represent the performance of our business, from our adjusted financial measures. Such items are evaluated by management on an individual basis based on both quantitative and qualitative aspects of their nature. While not all-inclusive, examples of certain other significant items excluded from our adjusted financial measures would be: changes in the fair value of derivatives and warrant obligations and the effective interest expense associated with the Facility Agreement with Deerfield and the senior secured term loan facility and the effective interest expense and a cumulative catch-up adjustment associated with the deferred royalty obligation under the royalty purchase agreement with HealthCare Royalty Partners. See the attached Reconciliation of IFRS Measures to Non-IFRS Measures for explanations of the amounts excluded and included to arrive at the non-IFRS financial measures. Forward-Looking Statements This press release contains forward-looking statements within the meaning of the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. In some cases you can identify forward-looking statements by terminology such as “may”, “will”, “should”, “would”, “expect”, “intend”, “plan”, “anticipate”, “believe”, “estimate”, “predict”, “potential”, “seem”, “seek”, “future”, “continue”, or “appear” or the negative of these terms or similar expressions, although not all forward-looking statements contain these identifying words. Forward-looking statements are subject to certain risks and uncertainties that can cause actual results to differ materially from those described. Factors that may cause such differences include, but are not limited to: the success of the Company’s updated corporate strategy including operating efficiencies, capital deployment and portfolio prioritization; the Company’s ability to achieve the 2023 net product sales guidance for ZYNLONTA® and the decrease in total operating expenses for 2023 and 2024, the expected cash runway into the middle of 2025, the effectiveness of the new commercial go-to-market strategy, competition from new technologies, the Company’s ability to continue to commercialize ZYNLONTA® in the United States and future revenue from the same; Swedish Orphan Biovitrum AB (Sobi®) ability to successfully commercialize ZYNLONTA® in the European Economic Area and market acceptance, adequate reimbursement coverage, and future revenue from the same; approval by the NMPA of the BLA for ZYNLONTA in China submitted by Overland ADCT BioPharma and future revenue from the same, our strategic partners’, including Mitsubishi Tanabe Pharma Corporation, ability to obtain regulatory approval for ZYNLONTA® in foreign jurisdictions, and the timing and amount of future revenue and payments to us from such partnerships; the Company’s ability to market its products in compliance with applicable laws and regulations; the Company’s expectations regarding the impact of the Infrastructure Investment and Jobs Act; the timing and results of the Company’s or its partners’ research projects or clinical trials including LOTIS 5 and 7, ADCT 901, 601 and 602, the impact, if any, from discontinuation of the LOTIS-9 study, actions by the FDA or foreign regulatory authorities with respect to the Company’s products or product candidates, the timing and outcome of regulatory submissions for the Company’s products or product candidates; the ability to complete clinical trials on expected timelines, if at all; projected revenue and expenses; the Company’s indebtedness, including Healthcare Royalty Management and Blue Owl and Oaktree facilities, and the restrictions imposed on the Company’s activities by such indebtedness, the ability to repay such indebtedness and the significant cash required to service such indebtedness; and the Company’s ability to obtain financial and other resources for its research, development, clinical, and commercial activities. Additional information concerning these and other factors that may cause actual results to differ materially from those anticipated in the forward-looking statements is contained in the “Risk Factors” section of the Company's Annual Report on Form 20-F and in the Company's other periodic reports and filings with the Securities and Exchange Commission. These statements involve known and unknown risks, uncertainties and other factors that may cause actual results, performance, achievements or prospects to be materially different from any future results, performance, achievements or prospects expressed in or implied by such forward-looking statements. The Company cautions investors not to place undue reliance on the forward-looking statements contained in this document. The Company undertakes no obligation to revise or update these forward-looking statements to reflect events or circumstances after the date of this press release, except as required by law. ADC Therapeutics SA (in KUSD except for per share data) (i) Share-based compensation expense represents the cost of equity awards issued to our directors, management and employees. The fair value of awards is computed at the time the award is granted, including any market and other performance conditions, and is recognized over the vesting period of the award by a charge to the income statement and a corresponding increase in other reserves within equity. These accounting entries have no cash impact. (ii) Change in the fair value of the convertible loan derivatives, senior secured term loan facility warrants and the Deerfield warrant obligation results from the valuation at the end of each accounting period. There are several inputs to these valuations, but those most likely to result in significant changes to the valuations are changes in the value of the underlying instrument (i.e., changes in the price of our common shares) and changes in expected volatility in that price. These accounting entries have no cash impact. (iii) Effective interest expense on convertible loans and senior secured term loans relates to the increase in the value of our loans in accordance with the amortized cost method. (iv) Deferred royalty obligation interest expense relates to the accretion expense on our deferred royalty obligation pursuant to the royalty purchase agreement with HCR and cumulative catch-up adjustment expense (income) relates to changes in the expected payments to HCR based on a periodic assessment of our underlying revenue projections. CONTACTS: