Avidity Biosciences Conference Call Summary Company Overview - **Company**: Avidity Biosciences - **Industry**: Biotechnology, specifically RNA therapeutics Key Points and Arguments FDA Interactions - Avidity has not experienced any changes in interactions with the FDA despite recent staffing changes within the agency, maintaining consistent communication over several years on three different programs [5][6][7] - The company emphasizes the importance of advocacy for the biotech ecosystem to ensure the FDA remains a premier review agency [6][7] Intellectual Property and Manufacturing - Avidity's intellectual property (IP) is primarily based in the US, covering all three of its drugs and aspects of its technology [8] - The company aims to manufacture drugs in the US for the US market, Europe for Europe, and has established a supply chain to eliminate redundancies [9] Product Pipeline and Development - Avidity is focused on revolutionizing the RNA space, with late-stage development in three programs targeting myotonic dystrophy, FSHD, and exon skipping [11] - The company plans to file its first Biologics License Application (BLA) for Del Zotia by the end of the year [11] - Enrollment for the HARVEST study in myotonic dystrophy is on track to complete by mid-year [12] FSHD Program - Avidity is the only company with a drug in development for FSHD, with ongoing discussions with the FDA regarding accelerated approval pathways [13][14] - The company has seen significant interest in FSHD due to its large patient population, comparable in size to cystic fibrosis [15] Clinical Data and Efficacy - Preliminary data from the FORTITUDE study shows over 50% reductions in DUX4 regulated genes and over 25% changes in circulating biomarkers, indicating significant muscle health improvements [17][18] - The company has chosen a lower dose of 2 mg/kg for its accelerated approval pathway based on safety and efficacy data [24][25] Unmet Medical Need - FSHD is described as a devastating disease with a high unmet medical need, justifying the use of the Accelerated Approval Pathway [33] - Patient testimonials highlight the severe impact of FSHD on daily life, emphasizing the need for effective treatments [35][38] Myotonic Dystrophy Program - Avidity's myotonic dystrophy program is in phase three, with an update expected in Q4 of this year [44] - The company has aligned with global regulators on study design, which supports both efficacy and safety for potential approval [51] Competitive Landscape - Avidity is aware of competitors in the DM1 space but emphasizes its rigorous approach to drug development and the importance of demonstrating functional changes to payers [56][58] Additional Important Content - The company is focused on ensuring that its drugs can be reimbursed effectively, which is a critical aspect of its phase three study designs [52] - Avidity's commitment to patient engagement is evident through its patient advisory council, which informs clinical trial design [35] This summary encapsulates the key insights from the Avidity Biosciences conference call, highlighting the company's strategic direction, product pipeline, and the critical unmet needs in the diseases it targets.

Company Performance - Avidity Biosciences reported a quarterly loss of $0.90 per share, slightly worse than the Zacks Consensus Estimate of a loss of $0.88, and compared to a loss of $0.79 per share a year ago, indicating a negative earnings surprise of -2.27% [1] - The company posted revenues of $1.57 million for the quarter ended March 2025, missing the Zacks Consensus Estimate by 46.68%, and down from $3.54 million in the same quarter last year [2] - Over the last four quarters, Avidity has surpassed consensus EPS estimates three times, but has only topped consensus revenue estimates once [2] Market Comparison - Avidity Biosciences shares have declined approximately 10% since the beginning of the year, while the S&P 500 has seen a decline of -4.3% [3] Future Outlook - The current consensus EPS estimate for the upcoming quarter is -$0.86 on revenues of $2.1 million, and for the current fiscal year, it is -$3.90 on revenues of $9.25 million [7] - The estimate revisions trend for Avidity Biosciences is currently favorable, leading to a Zacks Rank 2 (Buy) for the stock, suggesting it is expected to outperform the market in the near future [6] Industry Context - The Medical - Biomedical and Genetics industry, to which Avidity belongs, is currently in the top 33% of over 250 Zacks industries, indicating a positive outlook for stocks within this sector [8]

Financial Performance - The company reported net losses of $322.3 million and $212.2 million for the years ended December 31, 2024 and 2023, respectively, with an accumulated deficit of $1.0 billion as of March 31, 2025[81][82]. - Revenue for the three months ended March 31, 2025, was $1.573 million, a decrease of $1.970 million compared to the same period in 2024[96][97]. - The company has not generated any revenue from product sales since its inception in 2012 and plans to finance future needs through equity offerings and collaborations[80][83]. - Other income increased by $7.4 million for the three months ended March 31, 2025, due to higher interest income from marketable securities and cash[101]. - The company reported a net increase in cash, cash equivalents, and restricted cash of $34.3 million in Q1 2025, down from $286.3 million in Q1 2024, reflecting a decrease of $251.9 million[108]. Cash and Funding - The company has approximately $1.4 billion in cash, cash equivalents, and marketable securities as of March 31, 2025, expected to fund operations for at least 12 months[83]. - The company had cash, cash equivalents, and marketable securities of $1.4 billion as of March 31, 2025, sufficient to fund operations for at least 12 months[105]. - Net cash used in operating activities increased to $124.8 million for Q1 2025 from $70.4 million in Q1 2024, primarily due to higher research and development costs[109]. - Net cash provided by investing activities was $157.2 million in Q1 2025, driven by $330.2 million from maturities of marketable securities, offset by $169.3 million in purchases of marketable securities[110]. - Net cash provided by financing activities decreased significantly to $1.9 million in Q1 2025 from $389.4 million in Q1 2024, which included $244.2 million from common stock sales[111]. - The company terminated the 2022 Sales Agreement in August 2024 and entered into a new agreement allowing for the sale of up to $400 million in common stock[102][103]. Research and Development - Del-desiran is currently in Phase 3 development with the global HARBOR trial, involving approximately 150 participants aged 16 and older[70]. - The Phase 1/2 EXPLORE44 trial for del-zota demonstrated statistically significant improvements across key biomarkers, with a selected dose of 5 mg/kg every six weeks for future studies[72][74]. - Enrollment in the FORTITUDE trial for del-brax has been completed with a total of 51 participants, assessing safety and potential accelerated approval[76]. - The company plans to submit its first Biologics License Application (BLA) for del-zota by the end of 2025[74]. - Del-desiran has been granted Breakthrough Therapy designation by the FDA for the treatment of DM1, and all three programs have received Orphan Designation[67]. - The ongoing MARINA-OLE trial for del-desiran is expected to provide long-term safety data in Q4 2025[73]. - The company is advancing its AOC pipeline to develop treatments for rare diseases, including two candidates targeting rare genetic cardiomyopathies[78]. - The company anticipates ongoing increases in research and development expenses as it advances preclinical and clinical programs[89]. - Research and development expenses increased by $32.7 million to $99.490 million for the three months ended March 31, 2025, primarily due to increased external costs and higher personnel costs[99]. Expenses - General and administrative expenses rose by $19.7 million to $33.600 million for the three months ended March 31, 2025, mainly due to higher personnel costs and professional fees[100]. - The increase in cash used in operations is attributed to rising general and administrative expenses alongside research and development costs[109]. Collaborations and Agreements - The company entered into a collaboration with Bristol Myers Squibb, receiving approximately $100 million upfront, including $60 million in cash and $40 million from the purchase of common stock[84]. - The company is eligible for up to $1.35 billion in R&D milestone payments and $825 million in commercial milestone payments under the BMS Agreements[84]. Market and Risk - As of March 31, 2025, there have been no material changes in market risk compared to the previous year[115]. - The company continues to evaluate critical accounting estimates, with no material changes reported as of March 31, 2025[112]. - The company has not disclosed any new strategies or market expansions in the current report[115].

Financial Performance - Avidity reported a cash balance of approximately $1.4 billion as of March 31, 2025, supporting its late-stage clinical programs and commercial launch preparations[5]. - Collaboration revenues for Q1 2025 were $1.6 million, down from $3.5 million in Q1 2024, primarily due to the absence of revenue recognition from a prior year partnership[5]. - The net loss for Q1 2025 was $115.8 million, compared to a net loss of $68.9 million in Q1 2024, with a net loss per share of $0.90[13]. - Total operating expenses for Q1 2025 were $133.1 million, significantly higher than $80.7 million in Q1 2024[13]. Research and Development - Research and development expenses increased to $99.5 million in Q1 2025, compared to $66.8 million in Q1 2024, driven by advancements in del-desiran, del-brax, and del-zota[6]. - Avidity plans to submit its first Biologics License Application (BLA) for del-zota by the end of 2025, following positive topline data from the EXPLORE44 trial[2]. - The company is on track to share key regulatory updates for del-brax in Q2 2025, including a potential accelerated approval path in the U.S.[2]. - Enrollment for the ongoing Phase 3 HARBOR trial for del-desiran is expected to be completed by mid-2025, with marketing application submissions planned starting in 2026[3]. - Avidity completed enrollment for the FORTITUDE biomarker cohort for del-brax with 51 participants, ahead of original guidance[3]. Administrative Expenses - General and administrative expenses rose to $33.6 million in Q1 2025, up from $13.9 million in Q1 2024, mainly due to higher personnel costs[6].

Company Overview - Avidity Biosciences, Inc. (RNA) shares increased by 11.3% to close at $29.77, following a period of 6.4% loss over the past four weeks, indicating a significant turnaround in investor sentiment [1][2] Clinical Pipeline - The surge in stock price is attributed to positive investor sentiment regarding Avidity's rare diseases pipeline, with three investigational candidates currently in mid to late-stage clinical studies for different muscle disease indications [2] Financial Expectations - The company is expected to report a quarterly loss of $0.88 per share, reflecting an 11.4% year-over-year decline, with revenues projected at $2.95 million, down 16.7% from the previous year [3] - The consensus EPS estimate for the quarter has remained unchanged over the last 30 days, suggesting that stock price movements may not sustain without trends in earnings estimate revisions [4] Industry Context - Avidity Biosciences operates within the Zacks Medical - Biomedical and Genetics industry, where another company, Mirum Pharmaceuticals, Inc. (MIRM), closed 2.2% higher at $45, but has seen a -2.6% return over the past month [4] - Mirum Pharmaceuticals' consensus EPS estimate has changed by -3.2% over the past month to -$0.37, representing a 31.5% increase compared to the previous year's EPS [5]

Core Insights - Avidity Biosciences has completed enrollment in the FORTITUDE biomarker cohort for delpacibart braxlosiran (del-brax), targeting accelerated approval for treating facioscapulohumeral muscular dystrophy (FSHD) [1][2] - The company plans to present topline data from the FORTITUDE trial in Q2 2025, with regulatory alignment anticipated for a global Phase 3 trial [1][6] - Del-brax aims to be the first approved therapy for FSHD, a rare disease affecting approximately 45,000 to 87,000 individuals in the U.S. and EU [2][10] Company Overview - Avidity Biosciences focuses on RNA therapeutics, specifically Antibody Oligonucleotide Conjugates (AOCs™), to address rare neuromuscular diseases [11] - The company is advancing clinical programs for multiple conditions, including myotonic dystrophy type 1 and Duchenne muscular dystrophy, alongside FSHD [11] Clinical Trial Details - The FORTITUDE trial is a Phase 1/2 randomized, placebo-controlled study evaluating del-brax in 90 participants with FSHD [3] - The trial assesses safety, tolerability, pharmacokinetics, and pharmacodynamics, using biomarkers like DUX4-regulated genes and MRI measures [3][4] - The ongoing biomarker cohort evaluates del-brax at a dose of 2 mg/kg every six weeks for 12 months, focusing on changes in DUX4-regulated gene expression [5] Efficacy and Safety Data - Initial data from the 2 mg/kg dose of del-brax show over 50% reductions in DUX4-regulated genes, alongside trends of functional improvement and favorable safety [2][9] - The trial's design includes three dose cohorts, with the 2 mg/kg every six weeks identified for future studies [4] Future Plans - Avidity aims to share additional data and key milestones from the del-brax program in Q2 2025, including regulatory updates and topline results [2][6]

Company Overview - Avidity Biosciences, Inc. is a biopharmaceutical company focused on RNA therapeutics, specifically Antibody Oligonucleotide Conjugates (AOCs™) [4] - The company aims to improve lives by delivering innovative RNA therapies that combine the specificity of monoclonal antibodies with the precision of oligonucleotide therapies [4] - Avidity is leading clinical development programs for three rare neuromuscular diseases: myotonic dystrophy type 1 (DM1), Duchenne muscular dystrophy (DMD), and facioscapulohumeral muscular dystrophy (FSHD) [4] Industry Engagement - Avidity is actively participating in Rare Disease Day to raise awareness about rare diseases, particularly rare neuromuscular disorders [2][3] - The company supports various initiatives, including the EveryLife Foundation for Rare Diseases and the Jett Foundation's webinar on Duchenne muscular dystrophy [5] - Avidity collaborates with advocacy organizations, researchers, and healthcare providers to foster innovation and provide hope for those affected by rare diseases [3] Clinical Development - Avidity has demonstrated the first successful targeted delivery of RNA into muscle using its proprietary AOC platform [4] - The company is also advancing two precision cardiology development candidates aimed at addressing rare genetic cardiomyopathies [4] - Avidity is expanding its pipeline to include programs in cardiology and immunology through strategic partnerships [4]

Company Performance - Avidity Biosciences reported a quarterly loss of $0.80 per share, which was better than the Zacks Consensus Estimate of a loss of $0.84, and compared to a loss of $0.79 per share a year ago, indicating an earnings surprise of 4.76% [1] - The company posted revenues of $2.97 million for the quarter ended December 2024, surpassing the Zacks Consensus Estimate by 29.26%, and this represents an increase from revenues of $2.19 million in the same quarter last year [2] - Over the last four quarters, Avidity Biosciences has surpassed consensus EPS estimates four times, but has only topped consensus revenue estimates once [2] Stock Outlook - The immediate price movement of Avidity Biosciences' stock will depend on management's commentary during the earnings call, with shares having added about 2% since the beginning of the year, outperforming the S&P 500's gain of 1.3% [3] - The current consensus EPS estimate for the upcoming quarter is -$0.76 on revenues of $2.95 million, and for the current fiscal year, it is -$3.34 on revenues of $14.48 million [7] Industry Context - Avidity Biosciences operates within the Medical - Biomedical and Genetics industry, which is currently ranked in the top 28% of over 250 Zacks industries, suggesting a favorable industry outlook [8] - The performance of Avidity Biosciences' stock may also be influenced by the overall outlook for the industry, as research indicates that the top 50% of Zacks-ranked industries outperform the bottom 50% by a factor of more than 2 to 1 [8]

Financial Performance - The company has incurred significant operating losses of $322.3 million, $212.2 million, and $174.0 million for the years ended December 31, 2024, 2023, and 2022, respectively, with an accumulated deficit of $893.1 million as of December 31, 2024[193]. - The company expects to continue incurring losses for the foreseeable future as it develops its product candidates and seeks regulatory approval[194]. - The company will require substantial additional financing to achieve its goals, with potential capital needs driven by ongoing clinical trials and commercialization efforts[195]. - The company’s future capital requirements will depend on various factors, including the success of its clinical trials and regulatory approvals[198]. - As of December 31, 2024, the company reported federal net operating losses (NOLs) of approximately $249.4 million and state NOLs of approximately $439.3 million[355]. Product Development and Clinical Trials - The company has three product candidates in clinical development, while all other development programs are in preclinical or discovery stages[202]. - The company acknowledges that preclinical and clinical development is lengthy, expensive, and uncertain, with a high historical failure rate for product candidates in the industry[211]. - The company has experienced a partial clinical hold on its Phase 1/2 MARINA clinical trial due to a serious adverse event, which was lifted in October 2024, indicating potential delays in product development timelines[217]. - The company may face challenges in patient enrollment for clinical trials, which could delay development activities and affect the timing of clinical trials[224]. - The timeline for clinical trials is heavily dependent on the ability to recruit a sufficient number of eligible patients, with potential delays if recruitment is inadequate[226]. - The company has not completed any pivotal clinical trials or submitted a Biologics License Application (BLA) for regulatory approval, which may hinder future product commercialization[234]. Regulatory Environment - The company must demonstrate safety, purity, and potency of product candidates to the FDA, which involves conducting well-controlled clinical trials that are expensive and time-consuming[215]. - Regulatory approval processes are extensive and costly, often taking years, and there is no guarantee of approval even after significant investment in clinical development[236]. - The FDA or comparable foreign regulatory authorities can delay or deny approval for various reasons, including negative results from clinical trials or safety concerns[238]. - The company is subject to varying interpretations of clinical data by regulatory authorities, which could affect the approval and commercialization of product candidates[206]. - Regulatory changes, such as the EU Clinical Trials Regulation, may impact the company's development plans and require compliance adjustments[213]. Competition and Market Dynamics - The company faces significant competition in the biopharmaceutical industry, which may adversely affect its ability to develop and commercialize products[191]. - The company faces significant competition from larger pharmaceutical firms and ongoing developments in RNA-targeted therapies[298]. - The total addressable market for the company's product candidates may be smaller than anticipated, affecting revenue potential and business sustainability[306]. - Commercial success of product candidates will depend on market acceptance by physicians, patients, and healthcare payors, which is uncertain[286]. - Factors affecting market acceptance include clinical efficacy, safety, pricing, and reimbursement from third-party payors[287]. Collaborations and Partnerships - In November 2023, the company entered into a collaboration agreement with BMS for the development of up to five cardiovascular targets, with BMS responsible for funding all future clinical development and commercialization activities[273]. - The company has entered into a collaboration agreement with Lilly for the discovery and development of AOCs, with Lilly solely responsible for funding preclinical research and clinical development[271]. - Any unilateral termination of the agreements with Lilly or BMS could prevent the company from receiving research funding and adversely affect public perception of its product candidates[274]. - The company may seek additional collaborations or licenses but may not be successful, potentially relinquishing valuable rights and facing unfavorable terms[276]. Manufacturing and Supply Chain Risks - The company relies on third parties for manufacturing its product candidates, which increases the risk of delays or insufficient quantities[191]. - The company does not own or operate manufacturing facilities and has no plans to develop its own manufacturing capabilities, relying entirely on third-party manufacturers[265]. - The company does not currently have arrangements for redundant supply or a second source for all required raw materials, which could impact manufacturing if issues arise with third-party manufacturers[268]. - The company relies on third parties for preclinical studies and clinical trials, which poses risks if these parties do not meet their contractual obligations[261]. Intellectual Property and Legal Risks - The company faces risks related to intellectual property, as failure to obtain and maintain patent protection could allow competitors to commercialize similar products, adversely affecting its business[359]. - The patent prosecution process is complex and costly, and the company may not be able to secure necessary patent protections in a timely manner, which could harm its financial condition and prospects[362]. - The company may face claims challenging the inventorship of its patents, which could lead to litigation and loss of valuable intellectual property rights[380]. - The company relies on trade secrets and confidentiality agreements to protect its proprietary technology, but enforcement of these agreements can be difficult and costly[381]. Compliance and Regulatory Obligations - Compliance with healthcare laws and regulations is critical, as failure to adhere could negatively impact the company's financial condition[319]. - The company must comply with various federal and state healthcare laws to avoid significant penalties, including exclusion from government-funded healthcare programs[321]. - The company intends to participate in the Medicaid Drug Rebate Program (MDRP) and other governmental pricing programs, which require compliance with reporting and payment obligations[331]. - The company faces increased scrutiny over drug pricing, with potential Congressional inquiries and new regulations aimed at enhancing pricing transparency[326]. Economic and Market Conditions - The U.S. economy experienced significant inflation from 2021 to 2024, impacting costs for commodities, labor, and materials, which could adversely affect the company's financial condition[358]. - Pricing pressures are expected due to managed healthcare trends and governmental cost containment initiatives[297]. - The reimbursement landscape is complex and varies significantly among third-party payors, impacting commercialization efforts[295].

Exhibit 99.1 Avidity Biosciences Reports Fourth Quarter 2024 Financial Results and Recent Highlights Building on success across its three clinical programs, Avidity is leading in rare neuromuscular diseases with a strong balance sheet to execute on a transformational 2025 Major milestones anticipated for each rare neuromuscular program in 2025, including preparing for Avidity's first BLA submission Commercial preparations well underway in anticipation of three potential successive product launches for DMD, ...