This presentation release contains "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995, including statements regarding future expectations, plans and prospects for the company; the ability to successfully achieve and execute on the company's priorities and achieve key clinical milestones; the company's plans to present data from its Friedreich's ataxia program, next-generation Duchenne muscular dystrophy program, novel capsid program, and process developme ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from _________ to _________ Commission File Number: 001-38360 Solid Biosciences Inc. (Exact Name of Registrant as Specified in its Charter) (State or other jurisdict ...

Financial Performance - The company incurred a net loss of $86.0 million for the year ended December 31, 2022, with an accumulated deficit of $562.7 million as of the same date [237]. - The company expects to continue incurring significant operating losses for the foreseeable future as it focuses on research and development [237]. - The company has never generated revenue from product sales and does not expect to do so for the foreseeable future [244]. - The company will need to raise additional funds to continue operations beyond 2025, with no assurance that such funds will be available on acceptable terms [240]. Acquisition and Integration - The acquisition of AavantiBio was completed on December 2, 2022, and included pipeline programs for treating FA and BAG3 mediated dilated cardiomyopathy [230]. - There is a risk that the integration of AavantiBio may divert management's attention and disrupt ongoing business operations [231]. - The anticipated benefits of the acquisition may not be realized if integration challenges arise or if undisclosed liabilities surface [232]. - Future capital requirements will depend on the progress and costs associated with integrating AavantiBio and the results of clinical trials for SGT-003 and other candidates [241]. - The company may face increased litigation risks following the acquisition, which could adversely impact business operations [236]. Clinical Trials and Regulatory Challenges - The COVID-19 pandemic has caused disruptions in clinical trials, regulatory activities, and supply chains, impacting the ability to complete preclinical studies and clinical trials [247][248]. - Company has faced challenges in recruiting patients for clinical trials due to COVID-19, resulting in missed or postponed patient visits [249]. - Regulatory approvals may be delayed or impacted due to the redirection of resources by the FDA towards COVID-19 therapies, affecting the progress of the company's product candidates [250]. - The company has limited experience in regulatory submissions and has never completed a clinical trial, which poses risks for future product candidates [272]. - The company may face significant delays in clinical trials due to various factors, including patient recruitment and regulatory approvals [278]. - Regulatory approval for SGT-003, AVB-202-TT, and AVB-401 is uncertain, and even if trials are successful, approvals may be for narrower indications than sought [285]. Product Development and Safety Concerns - The regulatory approval process for gene transfer candidates is uncertain and can be more expensive and time-consuming compared to other products, with only a limited number of such products approved in the U.S. and EU [262]. - There is a risk of undesirable side effects from gene transfer candidates that could delay or prevent regulatory approval, impacting their commercial potential [263]. - Previous gene therapy treatments have reported significant adverse side effects, raising concerns about the safety and efficacy of the company's candidates [266]. - A serious adverse event related to SGT-001 occurred in a clinical trial, leading to a clinical hold by the FDA in November 2019, which was lifted in October 2020 [270]. - The anticipated dosing requirements for SGT-003 may increase the risk of adverse side effects, as seen in previous high-dose AAV vector administrations [268]. Manufacturing and Supply Chain Risks - The company currently relies on third-party manufacturers for SGT-003 and plans to do so for AVB-202-TT and AVB-401 programs, which exposes it to risks of delays and insufficient supply [351]. - The company does not have long-term supply arrangements for SGT-003, which may hinder its ability to scale production and meet future demand [353]. - There is a risk of significant disruption in supply due to factors such as equipment malfunctions, contamination, or public health issues like the COVID-19 pandemic [346]. - The company is at risk of contamination in its manufacturing processes, which could disrupt the supply of its product candidates and affect clinical development timelines [366]. Market and Competitive Landscape - The company faces significant competition from larger pharmaceutical and biotechnology firms, which may achieve regulatory approval before the company or develop more effective therapies [328]. - Competitors such as Pfizer and Sarepta Therapeutics are advancing in clinical trials for gene therapies, with Sarepta having submitted a BLA for its candidate with a PDUFA date of May 29, 2023 [329]. - The company's commercial opportunity may be diminished if competitors launch safer, more effective, or less expensive products first [330]. - The commercial success of gene therapy products may be limited by patients' immune responses, affecting the population amenable to treatment [360]. Regulatory Environment and Compliance - The FDA may require a Risk Evaluation and Mitigation Strategy (REMS) if SGT-003 or other candidates receive marketing approval, which could include a medication guide and communication plan [269]. - Compliance with ongoing regulatory requirements post-approval is necessary, and failure to do so could limit the ability to market future products [291]. - The company is subject to various stringent privacy laws and regulations, including HIPAA, which impose significant compliance costs and potential penalties for violations [405]. - The company faces risks related to anti-corruption laws, including the U.K. Bribery Act and the U.S. Foreign Corrupt Practices Act, which could lead to civil or criminal penalties if violated [416]. Financial and Operational Risks - The company faces potential pricing pressures from both federal and state healthcare reforms, which could limit revenue generation capabilities [396]. - The company has reduced its workforce by approximately 35% in April 2022 and 18% in December 2022 as part of a strategic plan to streamline operations, but may not realize the anticipated benefits from these reductions [381]. - The company is highly dependent on key employees, and the loss of these individuals could impede the achievement of its research and commercialization objectives [378]. - The company may engage in future acquisitions or strategic collaborations, which could increase capital requirements and introduce additional risks [376].

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from _________ to _________ Commission File Number: 001-38360 Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Sec ...

© 2022 Solid Biosciences 1 Strategic Update: Acquisition of AavantiBio and $75M PIPE September 30, 2022 Forward-Looking Statements and Industry and Market Data This presentation and various remarks we make during this presentation contain "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995, including statements regarding: future expectations, plans and prospects for Solid Biosciences Inc. (the "Company" or "Solid"), AavantiBio, Inc. ("AavantiBio") and the ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from _________ to _________ Commission File Number: 001-38360 Solid Biosciences Inc. (Exact Name of Registrant as Specified in its Charter) Delaware 90-0943402 (State ...

Solid Biosciences Inc. (NASDAQ:SLDB) Q1 2022 Results Conference Call April 27, 2022 8:00 AM ET Company Participants Caitlin Lowie - VP, Communications and IR Ilan Ganot - Co-Founder, President and CEO Dr. Joel Schneider - COO Dr. Carl Morris - Chief Scientific Officer Dr. Roxana Donisa Dreghici - SVP and Head, Clinical Development Conference Call Participants Gena Wang - Barclays Joseph Schwartz - SVB Securities Allison Bratzel - Piper Sandler Anupam Rama - JP Morgan Maury Raycroft - Jefferies Operator Ladi ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38360 Solid Biosciences Inc. (Exact Name of Registrant as Specified in its Charter) Delaware 90-0943402 (State or other jurisdict ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2021 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 001-38360 Solid Biosciences Inc. (Exact name of Registrant as specified in its Charter) (State or other jurisdiction of incorporation or ...

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38360 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2021 OR Solid Biosciences Inc. (Exact Name of Registrant as Specified in its Charter) Delaware 90-0943402 (State or other juris ...