Myotonic Disorders

– Cash runway extended through the second quarter of 2026 – – $352 million in cash, cash equivalents and marketable securities as of December 31, 2023 – – Completed dosing for third cohort of Phase 1 clinical trial of ENTR-601-44 for the potential treatment of DMD with data readout on track for the second half of 2024 – – Regulatory applications expected in the fourth quarter of 2024 for the global Phase 2 clinical development of ENTR-601-44 and ENTR-601-45 in people living with DMD – BOSTON, March 13, 2024 (GLOBE NEWSWIRE) -- Entrada Therapeutics, Inc. (Nasdaq: TRDA) is a clinical-stage biopharmaceutical company aiming to transform the lives of patients by establishing a new class of medicines that engage intracellular targets that have long been considered inaccessible. The Company today reported financial results for the fourth quarter and full year ending December 31, 2023, and highlighted recent business updates. “We continue to make significant progress advancing our growing pipeline of intracellular therapeutics,” said Dipal Doshi, Chief Executive Officer of Entrada Therapeutics. “We have an exciting year ahead in 2024, with several important clinical milestones within our Duchenne franchise, including the expected fourth quarter submissions of Phase 2 regulatory applications for the global development of ENTR-601-44 and ENTR-601-45. Clinical momentum is also building in our collaboration with Vertex, with the initiation of a Phase 1/2 clinical trial of VX-670 in patients with DM1. With the extension of our cash runway through the second quarter of 2026, we believe we are well positioned to progress our Duchenne franchise and broader pipeline to create value for patients and shareholders.” Recent Corporate Highlights Completed dosing for the first three cohorts of its Phase 1 clinical trial, ENTR-601-44-101, for the potential treatment of individuals with Duchenne muscular dystrophy (DMD) who are exon 44 skipping amenable. Entrada plans to announce data from the clinical trial in the second half of 2024. Additionally, the Company expects to submit regulatory applications in the fourth quarter of 2024 for the separate global Phase 2 clinical development of ENTR-601-44 in Duchenne patients who are exon 44 skipping amenable and ENTR-601-45 in Duchenne patients who are exon 45 skipping amenable. Vertex Pharmaceuticals announced it received clearances from Health Canada and Medicines and Healthcare Products Regulatory Agency (MHRA) in the United Kingdom for Clinical Trial Applications for VX-670 for patients with myotonic dystrophy type 1 (DM1). Vertex initiated the Phase 1/2 clinical trial in patients with DM1 in Canada and will initiate the study in the UK near-term. In January 2024, Entrada announced the promotion of Nathan Dowden, previously Chief Operating Officer of Entrada Therapeutics, to President and Chief Operating Officer. Mr. Dowden has played a critical role in developing Entrada’s strategic and operational capabilities. In February 2024, the Company appointed Kevin Healy, PhD, as Senior Vice President of Regulatory Affairs. Mr. Healy has extensive expertise in the development and commercialization of therapies for serious and rare diseases and has led or participated in more than 30 formal meetings with the FDA, EMA, and other global health authorities. In March 2024, Entrada appointed Marie Rosenfeld as Senior Vice President of Clinical Operations and Data Management. Ms. Rosenfeld has more than 20 years of experience in R&D at large and medium-size pharmaceutical companies and contract research organizations, with a proven track record of securing product regulatory approvals. Fourth Quarter and Full Year 2023 Financial Results Cash Position: Cash, cash equivalents and marketable securities were $352.0 million as of December 31, 2023, compared to $188.7 million as of December 31, 2022. This increase was primarily due to the proceeds received to date from the Vertex Agreement. Entrada anticipates that its cash, cash equivalents and marketable securities as of December 31, 2023, together with ongoing research support and the anticipated achievement of certain milestones pursuant to the Vertex collaboration, will be sufficient to fund the Company's operating expenses and capital expenditure requirements through the second quarter of 2026. Collaboration Revenue: Collaboration revenue was $41.8 million for the fourth quarter of 2023 and $129.0 million for the full year of 2023. There was no collaboration revenue in the fourth quarter or full year of 2022. Research & Development (R&D) Expenses: R&D expenses were $28.3 million for the fourth quarter of 2023 and $99.9 million for the full year of 2023, compared to $15.7 million and $66.6 million for the same periods in 2022, respectively. The increases were primarily due to the initiation of the ENTR-601-44 Phase 1 clinical trial, costs incurred for IND-enabling studies for ENTR-601-45 and ENTR-601-50 to support future clinical trials, additional platform investment, and higher personnel costs, including non-cash, stock-based compensation. General & Administrative (G&A) Expenses: G&A expenses were $8.7 million for the fourth quarter of 2023 and $32.3 million for the full year of 2023, compared to $9.9 million and $30.6 million for the same periods in 2022, respectively. The G&A expenses in the fourth quarter of 2023 were lower than the fourth quarter of 2022 primarily due to a decrease in legal and consulting fees. The increase in the full year expense was primarily due to higher personnel costs (including non-cash stock-based compensation). Net Income (Loss): Net loss was $9.5 million for the fourth quarter of 2023 and $6.7 million for the full year of 2023, compared to a net loss of $24.6 million and $94.6 million for the same periods in 2022, respectively. About Entrada Therapeutics Entrada Therapeutics is a clinical-stage biopharmaceutical company aiming to transform the lives of patients by establishing a new class of medicines that engage intracellular targets that have long been considered inaccessible. The Company’s Endosomal Escape Vehicle (EEV™)-therapeutics are designed to enable the efficient intracellular delivery of a wide range of therapeutics into a variety of organs and tissues, resulting in an improved therapeutic index. Through this proprietary, versatile and modular approach, Entrada is advancing a robust development portfolio of RNA-, antibody- and enzyme-based programs for the potential treatment of neuromuscular, ocular, metabolic and immunological diseases, among others. The Company’s lead oligonucleotide programs are in development for the potential treatment of people living with Duchenne who are exon 44, 45 and 50 skipping amenable. Entrada has partnered to develop a clinical-stage program, VX-670, for myotonic dystrophy type 1. For more information about Entrada, please visit our website, www.entradatx.com, and follow us on LinkedIn. Forward-Looking Statements This press release contains forward-looking statements that involve substantial risks and uncertainties. All statements, other than statements of historical facts, contained in this press release, including statements regarding Entrada’s strategy, future operations, prospects and plans, objectives of management, Entrada’s ability to continue to recruit for and complete its ongoing healthy volunteer trial for ENTR-601-44 in the United Kingdom with dosing complete through the third cohort, the ability of Entrada’s partner Vertex to recruit for and complete its Phase 1/2 clinical trial in patients with DM1 in Canada and to initiate a Phase 1/2 clinical trial in patients with DM1 in the United Kingdom, expectations regarding the timing of data from its Phase 1 clinical trial for ENTR-601-44 in the second half of 2024, expectations regarding the therapeutic benefits of ENTR-601-44, the continued development and advancement of ENTR-601-44, ENTR-601-45 and ENTR-601-50 for the treatment of Duchenne and our partnered candidate VX-670 for the treatment of DM1, expectations regarding the expected timing, progress and success of our collaboration with Vertex, including any future payments we may receive under our collaboration and license agreements, the ability to develop additional therapeutic programs, including further exon skipping programs, the potential therapeutic benefits of its EEV candidates, and the sufficiency of its cash resources through the second quarter of 2026, constitute forward-looking statements within the meaning of The Private Securities Litigation Reform Act of 1995. The words “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “intend,” “may,” “might,” “objective,” “ongoing,” “plan,” “predict,” “project,” “potential,” “should,” or “would,” or the negative of these terms, or other comparable terminology are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words. Entrada may not actually achieve the plans, intentions or expectations disclosed in these forward-looking statements, and you should not place undue reliance on these forward-looking statements. Actual results or events could differ materially from the plans, intentions and expectations disclosed in these forward-looking statements as a result of various important factors, including: uncertainties inherent in the identification and development of product candidates, including the conduct of research activities and the initiation and completion of preclinical studies and clinical trials; uncertainties as to the availability and timing of results from preclinical studies and clinical trials; the timing of and Entrada’s ability to submit and obtain regulatory clearance for IND or equivalent foreign applications and initiate or complete clinical trials; whether results from preclinical studies will be predictive of the results of later preclinical studies and clinical trials; whether Entrada’s cash resources will be sufficient to fund the Company’s foreseeable and unforeseeable operating expenses and capital expenditure requirements; as well as the risks and uncertainties identified in Entrada’s filings with the Securities and Exchange Commission (SEC), including the Company’s most recent Form 10-K and in subsequent filings Entrada may make with the SEC. In addition, the forward-looking statements included in this press release represent Entrada’s views as of the date of this press release. Entrada anticipates that subsequent events and developments will cause its views to change. However, while Entrada may elect to update these forward-looking statements at some point in the future, it specifically disclaims any obligation to do so. These forward-looking statements should not be relied upon as representing Entrada’s views as of any date subsequent to the date of this press release. ENTRADA THERAPEUTICS, INC. Condensed Consolidated Statements of Operations (Unaudited) (In thousands, except share and per share amounts) Three Months Ended December 31, Twelve Months Ended December 31, 2023 2022 2023 2022 Collaboration revenue$41,848 $— $129,013 $— Operating expenses: Research and development 28,291 15,685 99,884 66,609 General and administrative 8,652 9,894 32,291 30,639 Total operating expenses 36,943 25,579 132,175 97,248 Income (loss) from operations 4,905 (25,579) (3,162) (97,248)Other income: Interest and other income 4,292 950 15,218 2,632 Total other income 4,292 950 15,218 2,632 Income (loss) before provision for income taxes 9,197 (24,629) 12,056 (94,616)Provision for income taxes (18,741) — (18,741) — Net loss$(9,544) $(24,629) $(6,685) $(94,616)Net loss per share attributable to common stockholders, basic and diluted$(0.29) $(0.79) $(0.20) $(3.02)Weighted‑average common shares outstanding, basic and diluted 33,368,901 31,351,770 33,050,319 31,293,312 ENTRADA THERAPEUTICS, INC. Condensed Consolidated Balance Sheet Data (Unaudited) (In thousands) December 31, 2023 December 31, 2022Cash, cash equivalents and marketable securities$ 351,969 $ 188,712Total assets 469,192 252,056Total liabilities 226,832 39,502Total stockholders’ equity 242,360 212,554 Investor and Media Contact Karla MacDonald Chief Corporate Affairs Officer kmacdonald@entradatx.com

- Preclinical data show ARO-DM1 reduces muscular DMPK expression and corrects spliceopathies, which could lead to improved muscle strength and function PASADENA, Calif.--(BUSINESS WIRE)-- Arrowhead Pharmaceuticals, Inc., Inc. (NASDAQ: ARWR) announced today that it has dosed the first subjects in a Phase 1/2a double-blinded, placebo-controlled, dose-escalating study (NCT06138743) to evaluate single and multiple ascending doses of ARO-DM1, the company’s investigational RNA interference (RNAi) therapeutic, in up to 48 subjects with type 1 myotonic dystrophy (DM1). DM1 is the most common adult-onset muscular dystrophy. Patients with DM1 have muscle weakness and wasting, myotonia, cataracts, and often develop cardiac conduction abnormalities. Additionally, patients may become physically disabled and have a shortened life span. There is currently no approved disease-modifying therapy for DM1. Treatments have focused on symptomatic management, including physical therapy, exercise, ankle-foot orthoses, and assistive devices, such as wheelchairs. ARO-DM1 is designed to reduce expression of the dystrophia myotonica protein kinase (DMPK) gene in the muscle. Pathogenesis of DM1 is driven by an expanded CUG trinucleotide repeat in the 3’-untranslated region of DMPK transcripts. These abnormal transcripts cause mis-regulated splicing, known as spliceopathy, for certain messenger RNAs which are directly linked to the clinical manifestations of DM1. Preclinical data recently presented at the 2024 Muscular Dystrophy Association (MDA) Clinical & Scientific Conference showed that in nonhuman primates, ARO-DM1 achieved greater than 80% silencing of DMPK in skeletal muscle, which was maintained for longer than 85 days. In a mouse model of DM1 harboring a pathogenic DMPK transgene, a modified species-specific version of ARO-DM1 (S-ARO-DM1) decreased the DMPK-CUG expression and corrected the spliceopathies. Presentation materials may be accessed on the Events and Presentations page under the Investors section of the Arrowhead website. About Arrowhead Pharmaceuticals Arrowhead Pharmaceuticals develops medicines that treat intractable diseases by silencing the genes that cause them. Using a broad portfolio of RNA chemistries and efficient modes of delivery, Arrowhead therapies trigger the RNA interference mechanism to induce rapid, deep, and durable knockdown of target genes. RNA interference, or RNAi, is a mechanism present in living cells that inhibits the expression of a specific gene, thereby affecting the production of a specific protein. Arrowhead’s RNAi-based therapeutics leverage this natural pathway of gene silencing. For more information, please visit , or follow us on X (formerly Twitter) at @ArrowheadPharma or on LinkedIn. To be added to the Company's email list and receive news directly, please visit . Safe Harbor Statement under the Private Securities Litigation Reform Act: This news release contains forward-looking statements within the meaning of the "safe harbor" provisions of the Private Securities Litigation Reform Act of 1995. Any statements contained in this release except for historical information may be deemed to be forward-looking statements. Without limiting the generality of the foregoing, words such as “may,” “will,” “expect,” “believe,” “anticipate,” “hope,” “intend,” “plan,” “project,” “could,” “estimate,” “continue,” “target,” “forecast” or “continue” or the negative of these words or other variations thereof or comparable terminology are intended to identify such forward-looking statements. In addition, any statements that refer to projections of our future financial performance, trends in our business, expectations for our product pipeline or product candidates, including anticipated regulatory submissions and clinical program results, prospects or benefits of our collaborations with other companies, or other characterizations of future events or circumstances are forward-looking statements. These forward-looking statements include, but are not limited to, statements about the initiation, timing, progress and results of our preclinical studies and clinical trials, and our research and development programs; our expectations regarding the potential benefits of the partnership, licensing and/or collaboration arrangements and other strategic arrangements and transactions we have entered into or may enter into in the future; our beliefs and expectations regarding milestone, royalty or other payments that could be due to or from third parties under existing agreements; and our estimates regarding future revenues, research and development expenses, capital requirements and payments to third parties. These statements are based upon our current expectations and speak only as of the date hereof. Our actual results may differ materially and adversely from those expressed in any forward-looking statements as a result of numerous factors and uncertainties, including the impact of the ongoing COVID-19 pandemic on our business, the safety and efficacy of our product candidates, decisions of regulatory authorities and the timing thereof, the duration and impact of regulatory delays in our clinical programs, our ability to finance our operations, the likelihood and timing of the receipt of future milestone and licensing fees, the future success of our scientific studies, our ability to successfully develop and commercialize drug candidates, the timing for starting and completing clinical trials, rapid technological change in our markets, the enforcement of our intellectual property rights, and the other risks and uncertainties described in our most recent Annual Report on Form 10-K, subsequent Quarterly Reports on Form 10-Q and other documents filed with the Securities and Exchange Commission from time to time. We assume no obligation to update or revise forward-looking statements to reflect new events or circumstances. Source: Arrowhead Pharmaceuticals, Inc.

- Enrollment completed for PGN-EDO51 5 mg/kg cohort in CONNECT1-EDO51 Phase 2 clinical trial in DMD patients. The Company expects to announce preliminary data from the 5 mg/kg dose cohort in mid-2024 – - CONNECT2-EDO51 Phase 2 clinical trial in DMD patients open in the U.K. - Company believes this study could potentially support accelerated approval - - FREEDOM-DM1 Phase 1 clinical trial enrolling DM1 patients with preliminary data for at least the 5 mg/kg dose cohort expected in the second half of 2024 - - Gross proceeds of approximately $80 million from February 2024 follow-on offering extends projected operating cash runway into 2026 - BOSTON, March 06, 2024 (GLOBE NEWSWIRE) -- PepGen Inc. (Nasdaq: PEPG), a clinical-stage biotechnology company advancing the next generation of oligonucleotide therapies with the goal of transforming the treatment of severe neuromuscular and neurological diseases, today reported financial results for the fourth quarter and full year ended December 31, 2023, and highlighted recent corporate developments. “With important data readouts expected from our two lead programs, 2024 has the potential to be a transformational year for PepGen. In the last year, PepGen made meaningful advancements with our Enhanced Delivery Oligonucleotide (EDO) therapeutic candidates, including the initiation and dosing of patients in both our CONNECT1-EDO51 Phase 2 and FREEDOM-DM1 Phase 1 clinical trials,” said James McArthur, Ph.D., President and CEO of PepGen. “Following the recent completion of enrollment of cohort 1 of our CONNECT1-EDO51 trial, we look forward to sharing preliminary safety, exon 51 skipping, and dystrophin production data from the 5 mg/kg dose in mid-2024.” Dr. McArthur continued, “We continue to see encouraging enrollment in our ongoing FREEDOM-DM1 Phase 1 clinical trial. People with myotonic dystrophy type 1 (DM1) currently have no approved treatment options that target the root cause of the disease. We believe that PGN-EDODM1 has the potential to be disease-modifying and could generate meaningful, double-digit levels of splicing correction and corresponding correction of functional measures. We look forward to reporting preliminary data from at least the 5 mg/kg dose cohort later this year.” Recent Program Highlights PGN-EDO51: Duchenne Muscular Dystrophy (DMD) PGN-EDO51, PepGen’s lead investigational candidate in development for the treatment of DMD, utilizes the Company’s proprietary EDO technology to deliver a therapeutic oligonucleotide that is designed to target the root cause of this devastating disease. PGN-EDO51 is designed to skip exon 51 of the dystrophin transcript, an established therapeutic target for approximately 13% of people with DMD. Phase 2 CONNECT1-EDO51 Clinical Trial of PGN-EDO51 underway and 5 mg/kg cohort fully enrolled: In January 2024, PepGen announced that the first patient had been dosed in its Phase 2, open-label multiple ascending dose (MAD) CONNECT1-EDO51 clinical trial, being conducted in Canada, evaluating PGN-EDO51 in 10 male patients at least 8 years of age with DMD amenable to an exon 51-skipping approach. The starting dose will escalate from 5 mg/kg to 10 mg/kg with a potential for further dose escalations. All dose escalations will be determined based on evaluation of safety data from the prior dose cohort(s). PepGen is announcing that the 5 mg/kg PGN-EDO51 dose cohort is fully enrolled. PepGen expects to report preliminary data from this cohort in mid-2024, including initial safety, exon 51 skipping, and dystrophin production data. Initiation of CONNECT2-EDO51 Clinical Trial of PGN-EDO51: In March 2024, PepGen announced that it had received authorization from the Medicines and Healthcare products Regulatory Agency (MHRA) to initiate its Phase 2, randomized, double-blind, placebo-controlled MAD CONNECT2-EDO51 clinical trial in the United Kingdom evaluating PGN-EDO51 in approximately 20 male patients at least 6 years of age with DMD amenable to an exon 51-skipping approach. PepGen plans to extend this study to the United States and other countries, subject to regulatory authorizations. The CONNECT 2-EDO51 clinical trial, together with the data from CONNECT1-EDO51, is designed to potentially support a future accelerated approval pathway, subject to alignment with regulatory authorities. PGN-EDODM1: Myotonic Dystrophy 1 (DM1) PGN-EDODM1, PepGen’s second investigational candidate in development for the treatment of DM1, utilizes the Company’s proprietary EDO technology to deliver a therapeutic oligonucleotide that is designed to restore the normal splicing function of MBNL1. DM1 is a progressively disabling, life-shortening genetic disorder. DM1 is estimated to affect 40,000 people in the U.S., and over 74,000 people in Europe. Fast Track Designation granted to PGN-EDODM1: In February 2024, PepGen announced that the U.S. Food and Drug Administration granted Fast Track Designation to PGN-EDODM1 for the treatment of DM1. First Patient Dosed in Phase 1 FREEDOM-DM1 Clinical Trial of PGN-EDODM1: In December 2023, PepGen announced that the first patient had been dosed in its Phase 1 single ascending dose (SAD) FREEDOM-DM1 clinical trial evaluating PGN-EDODM1 in 24 adult patients with DM1 in the U.S., Canada, and the United Kingdom. The starting dose of 5 mg/kg can escalate to 10 mg/kg, and then 20 mg/kg based on evaluation of safety data from the prior dose cohort(s). PepGen anticipates reporting preliminary data from at least the 5 mg/kg PGN-EDODM1 dose cohort, including safety, splicing correction, and functional outcome measures, in the second half of 2024. In addition to the ongoing FREEDOM-DM1 trial, PepGen expects to open its FREEDOM2-DM1 placebo controlled, MAD clinical trial in DM1 patients in the second half of 2024. Preclinical PGN-EDO53: DMD PGN-EDO53 is PepGen’s third investigational candidate for the treatment of DMD that utilizes the Company’s proprietary EDO technology to deliver a therapeutic oligonucleotide that is designed to target the root cause of this devastating disease. PGN-EDO53 is designed to skip exon 53 of the dystrophin transcript, an established therapeutic target for approximately 8% of people with DMD. PepGen plans to advance PGN-EDO53 into investigational new drug (IND) and clinical trial application (CTA) enabling nonclinical studies. AdditionalCorporate Highlights $80 Million Underwritten Offering of Common Stock: In February 2024, PepGen priced an underwritten offering of 7,530,000 shares of common stock at a price to the public of $10.635 per share, for aggregate gross proceeds to PepGen of approximately $80 million, before deducting commissions and expenses payable by PepGen. Financial Results for the Three Months and Twelve Months ended December 31, 2023 Cash and cash equivalents were $110.4 million as of December 31, 2023. Based on the Company's current operating plan and projections, it believes that current cash, cash equivalents and marketable securities, together with the net proceeds from its recent common stock offering, will be sufficient to fund projected operating requirements into 2026. Research and development expenses were $16.3 million for the three months ended December 31, 2023, compared to $13.2 million for the same period in 2022. Research and development expenses were $68.1 million for the year ended December 31, 2023, compared to $54.1 million for the same period in 2022. The increase in research and development expenses was primarily due to costs associated with the advancement of the Company’s PGN-EDO51 and PGN-EDODM1 programs, including preclinical, clinical, and manufacturing costs for our ongoing and future clinical trials. General and administrative expenses were $4.5 million for the three months ended December 31, 2023, compared to $4.0 million for the same period in 2022. General and administrative expenses were $16.6 million for the year ended December 31, 2023, compared to $14.2 million for the same period in 2022. The increase in general and administrative expenses was primarily due to increased personnel-related costs. Net loss was $19.5 million for the three months ended December 31, 2023, compared to $14.9 million for the same period in 2022. Net loss was $78.6 million for the year ended December 31, 2023, compared to $69.1 million for the same period in 2022. PepGen had approximately 23.8 million shares outstanding on December 31, 2023. About PepGen PepGen Inc. is a clinical-stage biotechnology company advancing the next-generation of oligonucleotide therapies with the goal of transforming the treatment of severe neuromuscular and neurological diseases. PepGen’s Enhanced Delivery Oligonucleotide, or EDO, platform is founded on over a decade of research and development and leverages cell-penetrating peptides to improve the uptake and activity of conjugated oligonucleotide therapeutics. Using these EDO peptides, we are generating a pipeline of oligonucleotide therapeutic candidates that are designed to target the root cause of serious diseases. Forward-Looking Statements This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, as amended. These statements may be identified by words such as “aims,” “anticipates,” “believes,” “could,” “estimates,” “expects,” “forecasts,” “goal,” “intends,” “may,” “plans,” “possible,” “potential,” “seeks,” “will,” and variations of these words or similar expressions that are intended to identify forward-looking statements. Any such statements in this press release that are not statements of historical fact may be deemed to be forward-looking statements. These forward-looking statements include, without limitation, statements regarding the therapeutic potential and safety pro our product candidates, including PGN-EDO51, PGN-EDODM1 and PGN-EDO53, our technology, including our EDO platform, the design, initiation and conduct of clinical trials, including expected timelines, dose levels and dose escalation, including for our CONNECT2-EDO51 Phase 2 trial and our FREEDOM2-DMI trial, as well as preliminary data reports from our CONNECT1-EDO51 Phase 2 trial and FREEDOM-DM1 Phase 1 trial, the advancement of PGN-EDO53 into IND/CTA enabling studies, regulatory interactions, including development pathway for our product candidates, and our financial resources and expected cash runway. Any forward-looking statements in this press release are based on current expectations, estimates and projections only as of the date of this release and are subject to a number of risks and uncertainties that could cause actual results to differ materially and adversely from those set forth in or implied by such forward-looking statements. These risks and uncertainties include, but are not limited to risks related to: delays or failure to successfully initiate or complete our ongoing and planned development activities for our product candidates, including PGN-EDO51, PGN-EDODM1 and PGN-EDO53; our ability to enroll patients in our clinical trials, including CONNECT1-EDO51, CONNECT2-EDO51, FREEDOM-DM1and FREEDOM2-DM1; that our interpretation of clinical and preclinical study results may be incorrect, or that we may not observe the levels of therapeutic activity in clinical testing that we anticipate based on prior clinical or preclinical results; our product candidates, including PGN-EDO51 and PGN-EDODM1, may not be safe and effective or otherwise demonstrate safety and efficacy in our clinical trials; adverse outcomes from our regulatory interactions, including delays in regulatory review, clearance to proceed or approval by regulatory authorities with respect to our programs, including clearance to commence planned clinical studies of our product candidates, including CONNECT2-EDO51, or other regulatory feedback requiring modifications to our development programs; changes in regulatory framework that are out of our control; our ability to obtain, maintain and protect our intellectual property; our ability to enforce our patents against infringers and defend our patent portfolio against challenges from third parties; competition from others developing therapies for the indications we are pursuing; unexpected increases in the expenses associated with our development activities or other events that adversely impact our financial resources and cash runway; and our dependence on third parties for some or all aspects of our product manufacturing, research and preclinical and clinical testing. Additional risks concerning PepGen’s programs and operations are described in our most recent annual report on Form 10-K and quarterly report on Form 10-Q that are filed with the SEC. PepGen explicitly disclaims any obligation to update any forward-looking statements except to the extent required by law. PepGen Inc. Condensed Statement of Operations (in thousands, unaudited) Twelve Months Ended December 31, Three Months Ended December 31, 2023 2022 2023 2022 Operating expenses: Research and development $ 68,126 $ 54,077 $ 16,300 $ 13,166 General and administrative 16,640 14,224 4,511 4,047 Total operating expenses $ 84,766 $ 68,301 $ 20,811 $ 17,213 Operating loss $ (84,766 ) $ (68,301 ) $ (20,811 ) $ (17,213 ) Other income (expense) Interest income 6,400 2,793 1,346 1,591 Other income (expense), net (187 ) 110 43 (28 ) Total other income, net 6,213 2,903 1,389 1,563 Net loss before income tax $ (78,553 ) $ (65,398 ) $ (19,422 ) $ (15,650 ) Income tax (expense) benefit (73 ) (3,706 ) (73 ) 714 Net loss $ (78,626 ) $ (69,104 ) $ (19,495 ) $ (14,936 ) PepGen Inc. Condensed Balance Sheet Data (in thousands, unaudited) December 31, 2023 2022 Assets Cash, cash equivalents and marketable securities $ 110,407 $ 181,752 Other assets 32,645 35,688 Total assets $ 143,052 $ 217,440 Liabilities and stockholders’ equity Liabilities $ 34,631 $ 37,809 Stockholders’ equity: 108,421 179,631 Total liabilities and stockholders’ equity $ 143,052 $ 217,440 Investor Contact Laurence Watts Gilmartin Group Laurence@gilmartinir.com Media Contact Sarah Sutton Argot Partners pepgen@argotpartners.com