Table of Contents 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, 2025 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: 001-40502 __________________________ Lyell Immunopharma, Inc. (Exact Name of Registrant ...

Exhibit 99.1 Lyell Immunopharma Reports Business Highlights and Financial Results for the First Quarter 2025 SOUTH SAN FRANCISCO, Calif., May 13, 2025 -- Lyell Immunopharma, Inc. (Nasdaq: LYEL), a clinical-stage company advancing a pipeline of next-generation CAR T-cell therapies for patients with cancer, today reported financial results and business highlights for the first quarter ended March 31, 2025. Lyell's lead clinical program, LYL314 (formerly known as IMPT-314), is an autologous CD19/CD20 dual-targ ...

Presenting new clinical data from Phase 1/2 multi-center clinical trial of LYL314, a next-generation dual‑targeting CD19/CD20 CAR T-cell product candidate for the treatment of relapsed and/or refractory large B‑cell lymphoma at the 18th International Conference on Malignant Lymphoma.Received Regenerative Medicine Advanced Therapy (RMAT) designation from the United States Food and Drug Administration (FDA) for LYL314 for the treatment of relapsed and/or refractory diffuse large B-cell lymphoma in the third- ...

SOUTH SAN FRANCISCO, Calif., May 01, 2025 (GLOBE NEWSWIRE) -- Lyell Immunopharma, Inc. (Nasdaq: LYEL), a clinical-stage company advancing a pipeline of next-generation CAR T-cell therapies for patients with cancer, today announced that an abstract highlighting new clinical data from the Phase 1/2 trial of LYL314 (formerly IMPT-314) in large B-cell lymphoma will be presented as an oral presentation at the International Conference on Malignant Lymphoma (ICML) 2025 taking place in Lugano, Switzerland June 17-2 ...

Core Viewpoint - Lyell Immunopharma, Inc. has received Regenerative Medicine Advanced Therapy (RMAT) designation from the FDA for its next-generation CAR T-cell therapy, LYL314, aimed at treating adult patients with relapsed and/or refractory large B-cell lymphoma after two or more prior lines of therapy [1][2][7] Group 1: RMAT Designation and Clinical Data - The RMAT designation provides benefits similar to Fast Track and Breakthrough Therapy designations, facilitating early interactions with the FDA [2][6] - LYL314 is a dual-targeting CD19/CD20 CAR T-cell product candidate designed to enhance complete response rates and prolong response duration compared to existing CD19-targeted therapies [1][8] - Initial data from the Phase 1/2 trial showed a 94% overall response rate (16 out of 17 patients) and a 71% complete response rate by three months, with a median follow-up of 6.3 months [3][4] Group 2: Future Clinical Developments - Additional clinical updates from the Phase 1/2 trial are expected in 2025, including more mature data from patients in the 3rd or later line setting and initial data from the 2nd line setting [4][7] - Two pivotal programs for LYL314 are planned, one for patients in the 3rd or later line setting expected to start in mid-2025 and another for the 2nd line setting anticipated to begin by early 2026 [4][9] Group 3: Company Overview - Lyell Immunopharma is focused on advancing a pipeline of next-generation CAR T-cell therapies for hematologic malignancies and solid tumors, utilizing technologies to enhance CAR T-cell durability and efficacy [10]

Financial Performance and Capital Needs - The company has incurred substantial losses since inception and anticipates continuing to incur significant net losses for the foreseeable future [175]. - As of December 31, 2024, the company had approximately $383.5 million in cash, cash equivalents, and marketable securities, expected to meet capital needs into 2027 [186]. - The company may require substantial additional capital to achieve its goals, and failure to obtain necessary capital could delay or terminate product development efforts [185]. - The financial markets have experienced volatility, which could adversely affect the company's ability to secure financing and impact its growth strategy [209]. - Adverse developments in the financial services industry, such as bank failures, could impact the company's liquidity and operations [211]. - The company has not experienced adverse impacts from recent bank failures but remains cautious about potential liquidity concerns in the broader financial services industry [212]. Product Development and Clinical Trials - The company is focused on the clinical development of its product candidate IMPT-314, currently in Phase 1/2 clinical development [194]. - The company has not yet demonstrated the ability to successfully complete clinical trials or obtain regulatory approvals necessary for commercialization [194]. - The current clinical data for IMPT-314 in Phase 1/2 trials are limited, and prior results may not predict future outcomes [197]. - Patient enrollment and retention in clinical trials are critical; delays in these areas could adversely affect research and development efforts and financial results [257]. - Competition for patient enrollment in clinical trials is significant, particularly from companies with approved CAR T-cell therapies, which may limit the number of eligible patients [258]. - The company faces challenges in recruiting patients and investigators for clinical trials due to various factors, including the proximity of patients to clinical sites and the perceived risks of the product candidates [266]. - The company is currently in Phase 1/2 clinical development for its product candidate IMPT-314, with no products approved for commercial sale yet [267]. - Delays in patient enrollment for clinical trials may increase costs and slow down product development, potentially jeopardizing revenue generation [263]. - The company has not yet fully enrolled or completed any clinical trials required for the approval of its product candidates, leading to potential delays [283]. Regulatory and Compliance Challenges - The company plans to work closely with the FDA for regulatory approval, but the process may be complex and time-consuming, potentially increasing development costs [198]. - Regulatory approval for product candidates is uncertain and may take many years, with the FDA requiring substantial evidence from well-controlled clinical trials [269]. - The FDA's approval process is lengthy and unpredictable, which may hinder the commercialization of product candidates [296]. - Compliance with extensive regulatory requirements is necessary for manufacturing and distribution, which may incur significant expenses [301]. - The company may face penalties or product recalls if regulatory compliance issues arise [302]. - Changes in healthcare policies and regulations may impact the ability to obtain approval for or commercialize product candidates [314]. - Disruptions at the FDA due to funding shortages and workforce reductions could hinder the timely development and approval of new products, negatively impacting the company's business [320]. Manufacturing and Operational Risks - The company has built its own manufacturing facility in Bothell, Washington, designed to support nonclinical and clinical development product candidates [216]. - The acquisition of ImmPACT includes a manufacturing facility in Los Angeles, California, which is critical for the production of IMPT-314 [216]. - Manufacturing facilities are subject to ongoing inspections by the FDA and other regulatory authorities, and failure to comply could lead to significant delays in product availability [217]. - The complexity of manufacturing cellular therapies requires significant expertise and capital investment, with risks associated with scaling for advanced clinical trials [220]. - The company faces risks related to product loss due to low cell viability, contamination, and equipment failure, which could delay programs [222]. - Manufacturing operations may be adversely affected by natural disasters, equipment failures, and health epidemics, impacting business operations [226]. - The company maintains insurance coverage for property damage and business interruption, but it may not be sufficient to cover all potential losses [229]. - Reliance on third-party manufacturers poses risks, including potential delays in development and commercialization if they fail to meet regulatory standards [230]. - Specialty raw materials required for product candidates may not be available on acceptable terms, leading to potential delays in manufacturing [234]. Intellectual Property and Competitive Landscape - The ability to obtain and maintain sufficient intellectual property protection is crucial for the commercialization of product candidates, as inadequate protection could erode competitive advantages [338]. - The patentability and enforceability of patents in the biotechnology field are uncertain, which may affect the company's ability to secure necessary patents for its product candidates [339]. - The company faces risks regarding the validity and enforceability of its patents, which may be challenged by third parties, potentially jeopardizing commercialization efforts [340]. - The company may seek licenses from third parties for intellectual property rights, but there is no guarantee of obtaining these licenses on commercially reasonable terms [341]. - The lifespan of patents is generally 20 years from the first effective filing date, which may not be sufficient to protect the company's products from competition [346]. - The company may struggle to protect its intellectual property rights globally, as enforcement varies significantly across jurisdictions [347]. - The company may face costly and time-consuming litigation if accused of infringing third-party intellectual property rights, which could delay development and commercialization efforts [351]. Workforce and Operational Challenges - The company has implemented workforce reductions in late 2023 and early 2025, which may lead to operational challenges and loss of expertise [203]. - The company faces intense competition for skilled personnel in its operational regions, which may hinder its ability to attract and retain qualified employees [199]. - The company relies on third parties for clinical trials and research, and failure of these parties to perform satisfactorily could harm regulatory approval and commercialization efforts [237]. - The company relies on third parties, including CROs, for conducting clinical trials, which may lead to delays and increased costs due to budget negotiations and management focus required for switching or adding CROs [238]. Market and Economic Factors - The Inflation Reduction Act of 2022 extends enhanced subsidies for individuals purchasing health insurance coverage in the ACA marketplaces through plan year 2025 [314]. - The Medicare Drug Price Negotiation Program will begin to take effect progressively in fiscal year 2023, with the first ten drugs selected for price negotiations announced on August 15, 2024 [315]. - Cost containment reforms in the healthcare industry may adversely affect the company's operations, particularly in obtaining coverage and adequate reimbursement for product candidates [319]. - The U.S. Supreme Court's June 2024 decision may lead to increased regulatory uncertainty and inconsistent judicial interpretations affecting the FDA's regulations [306].

Financial Performance - Lyell reported a net loss of $191.9 million for Q4 2024, compared to a net loss of $52.9 million in Q4 2023, and a full-year net loss of $343.0 million versus $234.6 million in 2023[9] - Revenue for Q4 2024 was $11,000, a decrease of 15.4% compared to $13,000 in Q4 2023[17] - Non-GAAP net loss for Q4 2024 was $45,867,000, compared to $43,938,000 in Q4 2023, indicating a slight increase of 4.4%[21] - Total operating expenses for Q4 2024 were $201,158,000, significantly higher than $59,521,000 in Q4 2023, primarily due to acquired in-process research and development expenses of $87,184,000[17] - Operating expenses for Q4 2024 included $87.2 million in acquired in-process research and development expenses and a $51.3 million impairment charge for long-lived assets[15] Cash and Assets - The company has cash, cash equivalents, and marketable securities of $383.5 million as of December 31, 2024, down from $562.7 million at the end of 2023, which is expected to support operations into 2027[12] - Cash, cash equivalents, and marketable securities decreased to $383,541,000 as of December 31, 2024, down from $562,729,000 in 2023[18] - Total assets decreased to $490,859,000 as of December 31, 2024, from $750,029,000 in 2023, a decline of 34.5%[18] Research and Development - Research and development (R&D) expenses for Q4 2024 were $48.7 million, an increase from $47.0 million in Q4 2023, while full-year R&D expenses decreased to $171.6 million from $182.9 million[15] - Research and development expenses on a GAAP basis for 2024 were $171,603,000, down from $182,945,000 in 2023, a decrease of 6.2%[23] - The ongoing Phase 1/2 trial of IMPT-314 is designed to evaluate tolerability and clinical benefit, with more mature data expected to be shared in mid-2025[10] - IMPT-314, a next-generation dual-targeting CAR T-cell product candidate, is in Phase 1/2 clinical development for relapsed or refractory aggressive large B-cell lymphoma, with an overall response rate of 94% reported in initial data from 23 patients[10] - A new IND submission for a next-generation solid tumor CAR T-cell product candidate is expected in 2026, utilizing proprietary anti-exhaustion technology[3] - The pivotal trial for IMPT-314 in the 3rd line and later setting is expected to be initiated in mid-2025, with a second pivotal trial in the 2nd line setting anticipated by early 2026[6] General and Administrative Expenses - General and administrative (G&A) expenses for Q4 2024 were $14.5 million, compared to $13.2 million in Q4 2023, with full-year G&A expenses decreasing to $52.0 million from $67.0 million[15] - General and administrative expenses on a GAAP basis for 2024 were $52,041,000, a decrease of 22.5% from $66,983,000 in 2023[26] Impairment and Acquisitions - The company recognized impairment of long-lived assets amounting to $51,297,000 in Q4 2024[17] - The company acquired ImmPACT Bio, which strengthened its clinical pipeline with the addition of IMPT-314[6] Future Outlook - The company plans to continue focusing on research and development to enhance its product pipeline and market position[19]

Core Insights - Lyell Immunopharma is advancing its pipeline of next-generation CAR T-cell therapies, particularly focusing on IMPT-314, a dual-targeting CD19/CD20 CAR T-cell product candidate for aggressive large B-cell lymphoma [2][3][5] Financial Performance - For the fourth quarter of 2024, Lyell reported a net loss of $191.9 million, compared to a net loss of $52.9 million in the same period of 2023 [10] - The total net loss for the year ended December 31, 2024, was $343.0 million, up from $234.6 million in 2023 [10] - Cash, cash equivalents, and marketable securities stood at $383.5 million as of December 31, 2024, down from $562.7 million a year earlier, which is expected to support operations into 2027 [14] Clinical Development - IMPT-314 is currently in a Phase 1/2 clinical trial for relapsed or refractory aggressive large B-cell lymphoma, with initial data showing a 94% overall response rate and a 71% complete response rate at three months [6][7] - The company plans to initiate pivotal trials for IMPT-314 in the third-line and later setting by mid-2025 and in the second-line setting by early 2026 [2][12] Research and Development - Research and development expenses for the fourth quarter of 2024 were $48.7 million, slightly up from $47.0 million in the same quarter of 2023 [11] - The annual R&D expenses decreased to $171.6 million in 2024 from $182.9 million in 2023, primarily due to reduced personnel-related costs following a workforce reduction [11][13] Corporate Strategy - The acquisition of ImmPACT Bio has strengthened Lyell's clinical pipeline, particularly with the addition of IMPT-314 [5] - The company is focused on advancing next-generation CAR T-cell product candidates and plans to submit a new IND for a solid tumor CAR T-cell product candidate in 2026 [2][12]

Group 1 - Lyell Immunopharma, Inc. is a clinical-stage company focused on developing next-generation CAR T-cell therapies for cancer patients [1][2] - The company utilizes advanced technologies to enhance CAR T cells, enabling them to resist exhaustion and function effectively in challenging tumor microenvironments [2] - Upcoming investor conferences include the H.C. Wainwright 3rd Annual Cell Therapy Virtual Conference on February 25 and TD Cowen's 45th Annual Health Care Conference on March 3 [3] Group 2 - The company is headquartered in South San Francisco, California, with additional facilities in West Hills, California, and Seattle and Bothell, Washington [2] - A live webcast of the presentations will be available on the company's website, with replays accessible afterward [1]

Core Viewpoint - Lyell Immunopharma (LYEL) has been upgraded to a Zacks Rank 1 (Strong Buy) due to an upward trend in earnings estimates, which is a significant factor influencing stock prices [1][3]. Earnings Estimates and Stock Price Impact - The Zacks rating system emphasizes the importance of changing earnings estimates, which are closely correlated with near-term stock price movements [4][6]. - Rising earnings estimates for Lyell Immunopharma indicate an improvement in the company's underlying business, likely leading to increased stock prices as investors respond positively [5][10]. Earnings Estimate Revisions - For the fiscal year ending December 2024, Lyell Immunopharma is expected to earn -$0.78 per share, reflecting a year-over-year change of 16.1% [8]. - Over the past three months, the Zacks Consensus Estimate for Lyell Immunopharma has increased by 22.6%, indicating a positive trend in earnings expectations [8]. Zacks Rank System - The Zacks Rank system classifies stocks based on earnings estimate revisions, with only the top 5% receiving a 'Strong Buy' rating, highlighting Lyell Immunopharma's strong position in this regard [9][10]. - Historically, Zacks Rank 1 stocks have generated an average annual return of +25% since 1988, underscoring the effectiveness of the rating system [7].