ROCKET PHARMACEUTICALS, INC.
For the period ended Sep 30, 2025. Filed Nov 6, 2025.
View on SEC.govAbout this filing
A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.
Sep 30, 2025 · Filed Nov 6, 2025
What changed in Management’s Discussion and Analysis?
Read the current filingPrevious report: 10-Q
Period ended 2025-06-30; filed 2025-08-07.
0000950170-25-104996
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of OperationsRevenueGeneral and Administrative ExpensesInterest ExpenseInterest and Other IncomeCurrent report: 10-Q
Period ended 2025-09-30; filed 2025-11-06.
0001193125-25-269474
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of OperationsRevenueGeneral and Administrative ExpensesInterest ExpenseInterest and Other IncomeThe baseline is this issuer’s latest earlier reporting period of the same form that was filed before the current report. A previous 10-Q is a different quarter, not a year-over-year comparison. Amendments are excluded.
Compared 136 previous paragraphs and 137 current paragraphs.
110 unchanged; 23 reworded; 3 added; 2 removed; 1 previous and 1 current paragraphs rearranged.
Tables are not compared: 1 previous and 1 current tables excluded. Dates, whitespace, punctuation and numbering changes are ignored; changes to financial figures remain significant.
A changed paragraph is not evidence that risk increased or decreased. An unchanged paragraph does not establish that risk stayed the same.
Added paragraphs (3)
Current report
Submit BLAs for certain of our clinical programs.
Current report
In May 2025, two patients participating in the Phase 2 pivotal study of RP-A501 each experienced an unexpected SAE. The SAEs involved clinical complications related to a capillary leak syndrome and were followed by a systemic infection and multi-organ damage, ultimately leading to one of the patient’s death. Rocket voluntarily paused further Phase 2 study dosing in the U.S. and EU, and the FDA subsequently placed the trial on clinical hold on May 23, 2025 to allow for further evaluation. In August 2025, the FDA lifted the clinical hold on the Phase 2 pivotal study after the investigation traced the unexpected SAEs to a protocol amendment that added a C3 inhibitor to the immunomodulatory regimen. The FDA authorized resumption of the Phase 2 pivotal study with a recalibrated dose of 3.8 x 10¹³ GC/kg of RP-A501 along with the first three patients to be treated sequentially with a minimum four-week interval between each treatment. This adjusted dose aligns with the lower range of administered doses that were associated with efficacy across multiple biomarkers, electrocardiogram and clinical endpoints in the Phase 1 study, and has been determined as most likely to confer the safety and efficacy identified in the low-dose Phase 1 cohorts. In addition, Rocket will collaborate with investigators to implement an immunomodulatory regimen more closely reflecting that administered in the Phase 1 pediatric cohort. The revised regimen also discontinues prophylactic use of a C3 complement inhibitor.
Current report
To date, six patients with Danon disease have been treated in the Phase 2 study with RP-A501. Further updates about the Phase 2 study can be expected following review of data from the next three patients.
Removed paragraphs (2)
Previous report
Submit BLAs for our suite of clinical programs.
Previous report
Rocket is working with the FDA, the Independent Data Safety Monitoring Committee, clinical investigators, and scientific experts, and is committed to ensuring the safety of all study patients while resuming the trial as expeditiously as possible. Rocket is committed to transparency and will provide updates as our analysis progresses. However, while the clinical hold remains in place, the company is unable to provide guidance on the anticipated timing for completion of the Phase 2 trial.
Reworded paragraphs (23)
Previous wording
Rocket Pharmaceuticals is a fully integrated, late-stage biotechnology company focused on the development, manufacturing, and potential commercialization of genetic therapies for rare and often fatal diseases with high unmet medical need. Rocket’s innovative multi-platform approach allows for the creation of best-in-class gene therapies aimed at correcting the root cause of complex genetic disorders, spanning across cardiac and hematologic indications, offering the potential for transformative and durable clinical benefits. Rocket’s platform is supported by in-house R&D capabilities and current cGMP facilities that enable end-to-end control over clinical production and scale-up for commercialization.
Current wording
Rocket Pharmaceuticals is a fully integrated, late-stage biotechnology company focused on the development, manufacturing, and potential commercialization of genetic therapies for rare and often fatal diseases with a high unmet medical need. Rocket’s innovative multi-platform approach allows for the creation of best-in-class gene therapy product candidates aimed at correcting the root cause of complex genetic disorders, spanning across cardiac and hematologic indications, offering the potential for transformative and durable clinical benefits. Rocket’s platform is supported by in-house R&D capabilities and current cGMP facilities that enable end-to-end control over clinical production and scale-up for commercialization.
Previous wording
In July 2025, we announced a strategic corporate reorganization and pipeline prioritization aimed at maximizing near-term value, extending operational runway and positioning the company for sustained long-term growth. The restructuring and reprioritization initiative focuses our resources on the AAV cardiovascular platform, as well as submitting the completed responses to the CRL for KRESLADITM and a strategic reprioritization of assets away from the FA and PKD programs. As part of the restructuring, the Company implemented a reduction in the workforce of approximately 30%, which, along with other planned cost-saving initiatives, is expected to reduce Rocket’s 12-month operating expenses by nearly 25%.
Current wording
In July 2025, we announced a strategic corporate reorganization and pipeline prioritization designed to maximize near-term value, extend our operational runway, and position the Company for sustained long-term growth. This initiative focuses our resources on advancing our AAV cardiovascular gene therapy platform and supporting the submission of our responses to the CRL for KRESLADI™. The program contemplates a scaled commercial effort tailored to the exceptionally small patient population affected by this ultra-rare indication. As part of this strategic realignment, we are also de-prioritizing further development activities related to our FA and PKD programs. As part of the restructuring, the Company implemented a reduction in the workforce of approximately 30%, which, along with other planned cost-saving initiatives, is expected to reduce Rocket’s 12-month operating expenses by nearly 25%.
Previous wording
We are developing gene therapies utilizing modified, non-pathogenic viruses as delivery vehicles. Viruses are inherently effective for gene delivery due to their natural ability to enter cells and deliver genetic material. In engineering our viral vectors, the native viral genes are removed and replaced with a functional copy of the missing or mutated gene responsible for a patient’s genetic disorder. This functional copy, known as the therapeutic gene or “transgene,” is introduced through a process known as transduction. Once modified, the virus is termed a “viral vector,” capable of delivering the transgene to targeted tissues or organs.
Current wording
We are developing gene therapy product candidates utilizing modified, non-pathogenic viruses as delivery vehicles. Viruses are inherently effective for gene delivery due to their natural ability to enter cells and deliver genetic material. In engineering our viral vectors, the native viral genes are removed and replaced with a functional copy of the missing or mutated gene responsible for a patient’s genetic disorder. This functional copy, known as the therapeutic gene or “transgene,” is introduced through a process known as transduction. Once modified, the virus is termed a “viral vector,” capable of delivering the transgene to targeted tissues or organs.
Previous wording
We are advancing two categories of viral vectors: AAV vectors and LV vectors. We believe that our AAV- and LV-based programs have the potential to confer significant and durable therapeutic benefits. Our gene therapies are administered either (1)ex vivo, whereby a patient’s cells are collected, transduced with the viral vector in a controlled laboratory environment, and subsequently reinfused into the patient, or (2)in vivo, whereby the viral vector is delivered directly into the patient, either intravenously or through targeted tissue injection, to enable in situ transduction of the desired cell populations.
Current wording
We are advancing two categories of viral vectors: AAV vectors and LV vectors. We believe that our AAV- and LV-based programs have the potential to confer significant and durable therapeutic benefits. Our gene therapy product candidates are administered either (1)ex vivo, whereby a patient’s cells are collected, transduced with the viral vector in a controlled laboratory environment, and subsequently reinfused into the patient, or (2)in vivo, whereby the viral vector is delivered directly into the patient, either intravenously or through targeted tissue injection, to enable in situ transduction of the desired cell populations.
Previous wording
As previously disclosed, a patient receiving therapy on the high dose cohort (1.1e14 gc/kg dose) had progressive HF and underwent a heart transplant at month five following therapy. This patient had more advanced disease than the four other adult/older adolescent patients who received treatment in the low and high dose cohorts, as evidenced by diminished baseline left ventricle ejection fraction (35%) on echocardiogram and markedly elevated left ventricle filling pressure prior to treatment. The patient’s clinical course was characteristic of DD progression. The patient is doing well post-transplanting.
Current wording
As previously disclosed, a patient receiving therapy on the high dose cohort (1.1e14 gc/kg dose) had progressive HF and underwent a heart transplant at month five following therapy. This patient had more advanced disease than the four other adult/older adolescent patients who received treatment in the low and high dose cohorts, as evidenced by diminished baseline left ventricle ejection fraction (35%) on echocardiogram and markedly elevated left ventricle filling pressure prior to treatment. The patient’s clinical course was characteristic of DD progression. The patient is doing well post-transplant.
Previous wording
Based on the initial efficacy observed in the low dose cohort and to mitigate complement-mediated safety concerns observed in the high dose cohort (related to thrombotic microangiopathy or TMA) and in agreement with the FDA, we have moved forward with the low dose (6.7e13 gc/kg). Additional safety measures were implemented and are reflected in the updated trial protocol for Phase 1 and the protocol for our ongoing pivotal Phase 2 study. These measures include exclusion of patients with end-stage HF, and a refined immunomodulatory regimen involving transient B- and T-cell mediated inhibition, with emphasis on preventing complement activation, while also enabling lower steroid doses and earlier steroid taper, with all immunosuppressive therapy discontinued 2-3 months following administration of RP-A501.
Current wording
Based on the initial efficacy observed in the low dose cohort and to mitigate complement-mediated safety concerns observed in the high dose cohort (related to thrombotic microangiopathy or TMA) and in agreement with the FDA, the Phase 2 study was initiated at the low dose (6.7e13 gc/kg). Additional safety measures were implemented and are reflected in the updated trial protocol for Phase 1 and the protocol for our ongoing pivotal Phase 2 study. These measures include exclusion of patients with end-stage HF, and a refined immunomodulatory regimen involving transient B- and T-cell mediated inhibition, with emphasis on preventing complement activation, while also enabling lower steroid doses and earlier steroid taper, with all immunosuppressive therapy discontinued 2-3 months following administration of RP-A501.
Previous wording
In September 2024, we announced completion of enrollment of 12 patients in the Phase 2 study across sites in the U.S. and EU. As previously disclosed, two patients participating in the Phase 2 pivotal study of RP-A501 each experienced an unexpected Serious Adverse Event (SAE). The SAEs involved clinical complications related to a capillary leak syndrome and were followed by a systemic infection and multi-organ damage, ultimately leading to one of the patient’s death. Rocket voluntarily paused further Phase 2 study dosing in the U.S. and EU, and the FDA subsequently placed the trial on clinical hold on May 23, 2025 to allow for further evaluation. Rocket is conducting a comprehensive root cause analysis and remains in active dialogue with the FDA and other key stakeholders, with the current focus being on the recent introduction of a novel immune suppression agent, a C3 inhibitor, to the pre-treatment regimen that had been implemented to mitigate complement activation observed in some Phase 2 patients.
Current wording
In September 2024, we announced completion of enrollment of 12 patients in the Phase 2 study across sites in the U.S. and EU.
Previous wording
There are no specific available medical therapies available that have been shown to be highly effective for ACM, and current treatment protocols follow standard ventricular arrhythmia and cardiomyopathy guidelines, which involve lifestyle modifications (i.e. exercise limitation) and include drug treatments such as beta blockers, anti-arrhythmics and diuretics. The use of these therapies is driven by the arrhythmia burden and severity of cardiomyopathy. These therapies do not modify the course of the disease and generally provide only symptomatic and/or palliative support. Upon diagnosis, a substantial percentage of patients receive an ICD for primary or secondary prevention of ventricular arrhythmias and SCD. Of note, ICDs are not curative, and breakthrough life-threatening arrythmias may persist with ongoing risk of death. Furthermore, ICDs do not prevent the progression to end-stage HF. ICD firings, although lifesaving, are physically and emotionally traumatic events. Patients whose condition progresses to end-stage HF are considered for cardiac transplantation which, while curative of underlying disease, is itself associated with significant morbidity and mortality. Hence there exists a high unmet medical need in this population. PKP2-ACM is estimated to have a prevalence of 50,000 patients in the U.S. and EU.
Current wording
There are no specific available medical therapies available that have been shown to be highly effective for ACM, and current treatment protocols follow standard ventricular arrhythmia and cardiomyopathy guidelines, which involve lifestyle modifications (i.e. exercise limitation) and include drug treatments such as beta blockers, anti-arrhythmics and diuretics. The use of these therapies is driven by the arrhythmia burden and severity of cardiomyopathy. These therapies do not modify the course of the disease and generally provide only symptomatic and/or palliative support. Upon diagnosis, a substantial percentage of patients receive an ICD for primary or secondary prevention of ventricular arrhythmias and SCD. Of note, ICDs are not curative, and breakthrough life-threatening arrythmias may persist with ongoing risk of death. Furthermore, ICDs do not prevent the progression to end-stage HF. ICD firings, although lifesaving, are physically and emotionally traumatic events. Patients whose condition progresses to end-stage HF are considered for cardiac transplantation which, while curative of underlying disease, is associated with significant morbidity and mortality. Hence, there exists a high unmet medical need in this population. PKP2-ACM is estimated to have a prevalence of 50,000 patients in the U.S. and EU.
Previous wording
The ongoing single-arm, open-label, multi-center Phase 1 study is evaluating the safety and preliminary efficacy of RP-A601 in adult PKP2-ACM patients with ICDs and overall high risk for arrhythmias. The study is assessing the impact of RP-A601 on PKP2 myocardial protein expression, cardiac biomarkers, and clinical predictors of life-threatening ventricular arrhythmias and SCD. Patients in the Phase 1 study will receive a single dose of RP-A601 starting at 8 x 1013 GC/kg. Enrollment in the U.S. Phase 1 study has completed.
Current wording
The ongoing single-arm, open-label, multi-center Phase 1 study is evaluating the safety and preliminary efficacy of RP-A601 in adult PKP2-ACM patients with ICDs and overall high risk for arrhythmias. The study is assessing the impact of RP-A601 on PKP2 myocardial protein expression, cardiac biomarkers, and clinical predictors of life-threatening ventricular arrhythmias and SCD. Patients in the Phase 1 study received a single dose of RP-A601 starting at 8 x 1013 GC/kg. Enrollment in the U.S. Phase 1 study has completed. We are currently in ongoing discussions with the FDA regarding the design and potential endpoints of a pivotal Phase 2 trial intended to further evaluate the safety and efficacy of RP-A601 in this patient population.
Previous wording
In December 2022, we completed our acquisition of Renovacor which provided the Company with Renovacor’s recombinant AAV9-based gene therapy program designed to deliver a fully functional BAG3 gene to augment BAG3 protein levels in cardiomyocytes and slow or halt progression of BAG3-DCM. Initial proof of concept for AAV9-BAG3 has been demonstrated in studies of BAG3-knockout mouse models, which show treated mice have improved ejection fraction versus untreated knockout mice and comparable ejection fraction to walk test controls at timepoints 4- and 6-weeks post injection. In June 2025, the company received FDA clearance of an IND application for RP-A701, an AAV.rh74-based gene therapy candidate for the treatment of BAG3-DCM. Following, the FDA granted Fast Track designation to RP-A701 for the treatment of BAG3-DCM in July 2025.
Current wording
In December 2022, we completed our acquisition of Renovacor which provided the Company with Renovacor’s recombinant AAV9-based gene therapy program designed to deliver a fully functional BAG3 gene to augment BAG3 protein levels in cardiomyocytes and slow or halt progression of BAG3-DCM. Initial proof of concept for AAV9-BAG3 has been demonstrated in studies of BAG3-knockout mouse models, which show treated mice have improved ejection fraction versus untreated knockout mice and comparable ejection fraction to walk test controls at timepoints 4- and 6-weeks post injection.
Previous wording
KRESLADI™, formally known as RP-L201 or marnetegragene autotemcel, is our investigational gene therapy that contains autologous (patient-derived) hematopoietic stem cells that have been genetically modified with a lentiviral vector to deliver a functional copy of the ITGB2 gene. Rocket holds FDA RMAT, Rare Pediatric, and Fast Track designations in the U.S., PRIME and ATMP designations in the EU, and Orphan Drug designations in both regions for the program. KRESLADI™ was in-licensed from the Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Centro de Investigación Biomédica en Red de Enfermedades Raras and Instituto de Investigación Sanitaria Fundación Jiménez Díaz. The lentiviral vector was developed in a collaboration between University College London and CIEMAT.
Current wording
KRESLADI™, formally known as RP-L201 or marnetegragene autotemcel, is our investigational gene therapy that contains autologous (patient-derived) hematopoietic stem cells that have been genetically modified with a lentiviral vector to deliver a functional copy of the ITGB2 gene. Rocket holds FDA RMAT, Rare Pediatric, and Fast Track designations in the U.S., PRIME and ATMP designations in the EU, and Orphan Drug designations in both regions for the program. KRESLADI™ was in-licensed from the Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Centro de Investigación Biomédica en Red de Enfermedades Raras and Instituto de Investigación Sanitaria Fundación Jiménez Díaz. The lentiviral vector was developed in collaboration between University College London and CIEMAT.
Previous wording
In September 2023, A BLA filing for RP-L201 was accepted by the FDA with priority review with an initial PDUFA date of March 31, 2024. In February 2024, the review time was extended by three months, to June 30, 2024, to allow additional time to review clarifying CMC information submitted by us in response to FDA information requests. In June 2024, we announced that the FDA issued a CRL in response to the BLA wherein the FDA requested limited additional CMC information to complete its review. Submission of a complete BLA to resolve CRL is anticipated in 2025.
Current wording
In September 2023, A BLA filing for RP-L201 was accepted by the FDA with priority review with an initial PDUFA date of March 31, 2024. In February 2024, the review time was extended by three months, to June 30, 2024, to allow additional time to review clarifying CMC information submitted by us in response to FDA information requests. In June 2024, we announced that the FDA issued a CRL in response to the BLA wherein the FDA requested limited additional CMC information to complete its review. In October 2025, the Company announced that the FDA accepted its resubmission of the BLA for RP-L201 and was given a PDUFA date of March 28, 2026.
Previous wording
Fanconi Anemia (FA), a rare and life-threatening DNA-repair disorder, characterized by bone marrow failure, cancer predisposition, and congenital malformations. Patients with FA have a genetic defect that prevents the normal repair of genes and chromosomes within blood cells in the bone marrow. An estimated 60% to 70% of cases arise from mutations in the FANCA gene. FA frequently results in bone marrow failure, developmental abnormalities, acute myeloid leukemia, and other myelodysplastic syndrome types of blood cancers, often during the early years and decades of life. Bone marrow aplasia, which is bone marrow that no longer produces any or very few red and white blood cells and platelets leading to infections and bleeding, is the most frequent cause of early morbidity and mortality in FA, with a median onset before 10 years of age. Leukemia is the next most common cause of mortality, ultimately occurring in about 20% of patients later in life. Solid organ malignancies, such as head and neck cancers, can also occur, although at lower rates during the first two to three decades of life. The average lifespan of an FA patient is estimated to be 30 to 40 years. The prevalence of FA in the U.S. and EU is estimated to be approximately 5,500 to 7,000 patients.
Current wording
FA is a rare and life-threatening DNA-repair disorder, characterized by bone marrow failure, cancer predisposition, and congenital malformations. Patients with FA have a genetic defect that prevents the normal repair of genes and chromosomes within blood cells in the bone marrow. An estimated 60% to 70% of cases arise from mutations in the FANCA gene. FA frequently results in bone marrow failure, developmental abnormalities, acute myeloid leukemia, and other myelodysplastic syndrome types of blood cancers, often during the early years and decades of life. Bone marrow aplasia, which is bone marrow that no longer produces any or very few red and white blood cells and platelets leading to infections and bleeding, is the most frequent cause of early morbidity and mortality in FA, with a median onset before 10 years of age. Leukemia is the next most common cause of mortality, ultimately occurring in about 20% of patients later in life. Solid organ malignancies, such as head and neck cancers, can also occur, although at lower rates during the first two to three decades of life. The average lifespan of an FA patient is estimated to be 30 to 40 years. The prevalence of FA in the U.S. and EU is estimated to be approximately 5,500 to 7,000 patients.
Previous wording
On April 2, 2024, we announced that the EMA accepted our MAA for RP-L102. Submission of a BLA on a rolling review basis was initiated on September 26, 2024. As of July 2025, the Company is no longer allocating additional internal resources towards regulatory filings and commercial activities for RP-L102, including the MAA application, and we are actively exploring external partnership options to provide a path forward for RP-L102 and the FA community. This decision was based solely on business and strategic considerations and does not reflect any concerns regarding the safety, efficacy, or quality of the therapy.
Current wording
As of July 2025, the Company is no longer allocating additional internal resources towards regulatory filings and commercial activities for RP-L102 and subsequently is no longer pursuing BLA and EMA submissions for RP-L102. The Company is actively exploring external partnership options to provide a path forward for RP-L102 and the FA community. This decision was based solely on business and strategic considerations and does not reflect any concerns regarding the safety, efficacy, or quality of the therapy.
Previous wording
Pyruvate Kinase Deficiency (PKD) is a rare, autosomal recessive, monogenic red blood cell disorder resulting from a mutation in the PKLR gene encoding for the pyruvate kinase enzyme, a key component of the red blood cell glycolytic pathway. Mutations in the PKLR gene result in increased red blood cell destruction and potentially life-threatening anemia with a significant impact on quality of life. PKD has an estimated prevalence of 4,000 to 8,000 patients in the U.S. and Europe. Children are the most commonly and severely affected subgroup of patients. Patients with PKD have a high unmet medical need, as currently available treatments include splenectomy and red blood cell transfusions, which are associated with immune defects and chronic iron overload. Mitapivat, an oral enzyme activator, is approved for use in adult patients, however its efficacy is limited in more severely-afflicted patients, most notably in those who are splenectomized, transfusion-dependent, or whose disease results from deleterious mutations.
Current wording
PKD is a rare, autosomal recessive, monogenic red blood cell disorder resulting from a mutation in the PKLR gene encoding for the pyruvate kinase enzyme, a key component of the red blood cell glycolytic pathway. Mutations in the PKLR gene result in increased red blood cell destruction and potentially life-threatening anemia with a significant impact on quality of life. PKD has an estimated prevalence of 4,000 to 8,000 patients in the U.S. and Europe. Children are the most commonly and severely affected subgroup of patients. Patients with PKD have a high unmet medical need, as currently available treatments include splenectomy and red blood cell transfusions, which are associated with immune defects and chronic iron overload. Mitapivat, an oral enzyme activator, is approved for use in adult patients, however its efficacy is limited in more severely-afflicted patients, most notably in those who are splenectomized, transfusion-dependent, or whose disease results from deleterious mutations.
Previous wording
In May 2023, we presented positive updated clinical data at the ASGCT 26th Annual Meeting (data cut-off May 3, 2023), which included up to 30 months of follow-up from the two treated adult patients and early clinical data from the first pediatric patient treated with RP-L301. Robust and sustained efficacy was observed in both adult patients at up to 30 months post-infusion evidenced by normalized hemoglobin (from baseline pre-treatment levels in the 7.0-7.5 g/dL range), improved hemolysis parameters, and red blood cell transfusion independence. Furthermore, both adult patients reported improved quality of life with documented improvements via formal quality of life assessments. The safety profile continues to appear highly favorable, with no RP-L301-related serious adverse events in either of the adult patients. Insertion site analyses in peripheral blood and bone marrow in both adult patients through 24 months post-RP-L301 demonstrated highly polyclonal patterns and there has been no evidence of insertional mutagenesis. The first pediatric patient infusion of RP-L301 was well tolerated, with engraftment achieved at day +15, hospital discharge less than one month following infusion, no RP-L301 related serious adverse events and early signs of efficacy. There were no red blood cell transfusion requirements following engraftment.
Current wording
In May 2023, we presented positive updated clinical data at the ASGCT 26th Annual Meeting (data cut-off May 3, 2023), which included up to 30 months of follow-up from the two treated adult patients and early clinical data from the first pediatric patient treated with RP-L301. Clinically meaningful and durable efficacy was observed in both adult patients at up to 30 months post-infusion evidenced by normalized hemoglobin (from baseline pre-treatment levels in the 7.0-7.5 g/dL range), improved hemolysis parameters, and red blood cell transfusion independence. Furthermore, both adult patients reported improved quality of life with documented improvements via formal quality of life assessments. The safety profile continues to appear highly favorable, with no RP-L301-related serious adverse events in either of the adult patients. Insertion site analyses in peripheral blood and bone marrow in both adult patients through 24 months post-RP-L301 demonstrated highly polyclonal patterns and there has been no evidence of insertional mutagenesis. The first pediatric patient infusion of RP-L301 was well tolerated, with engraftment achieved at day +15, hospital discharge less than one month following infusion, no RP-L301 related serious adverse events and early signs of efficacy. There were no red blood cell transfusion requirements following engraftment.
Previous wording
Based on positive safety and efficacy data from the Phase 1 study, we have aligned with the FDA on the pivotal study design to support accelerated approval with a 10-patient, single-arm Phase 2 pivotal trial with a primary endpoint of ≥1.5 point Hgb improvement at 12 months. However, the Company is no longer allocating internal resources towards RP-L301 and does not plan to initiate enrollment in the Phase 2 RP-L301 study at this time. Like our FA program, we are actively exploring external partnership options to provide a path forward for RP-L301 and the PKD community.
Current wording
Based on positive safety and efficacy data from the Phase 1 study, we have aligned with the FDA on the pivotal study design to support accelerated approval with a 10-patient, single-arm Phase 2 pivotal trial with a primary endpoint of ≥1.5 point hemoglobin Hgb improvement at 12 months. However, the Company is no longer allocating internal resources towards RP-L301 and does not plan to initiate enrollment in the Phase 2 RP-L301 study at this time. Like our FA program, we are actively exploring external partnership options to provide a path forward for RP-L301 and the PKD community.
Previous wording
We have a 103,720 square foot manufacturing facility located in Cranbury, New Jersey. This facility supports clinical development of our pipeline of LV and AAV gene therapies from discovery through pivotal trials, with space for potential future expansion and commercialization.
Current wording
We have a 103,720 square foot manufacturing facility located in Cranbury, New Jersey. This facility supports clinical development of our pipeline of AAV gene therapy product candidates from discovery through pivotal trials, with space for potential future expansion and commercialization.
Previous wording
The following table presents R&D expenses tracked on a program-by-program basis as well as by type and nature of expense for the three and six months ended June 30, 2025, and 2024:
Current wording
The following table presents R&D expenses tracked on a program-by-program basis as well as by type and nature of expense for the three and nine months ended September 30, 2025, and 2024:
Previous wording
In June 2025, the Company’s Board of Directors approved a restructuring plan to reduce the Company’s workforce and incurred aggregate charges of approximately $3.5 million in restructuring expenses, consisting of employee severance payments and other termination benefits.
Current wording
In June 2025, the Company’s Board of Directors approved a restructuring plan to reduce the Company’s workforce and incurred aggregate charges of approximately $3.3 million in restructuring expenses, consisting of employee severance payments and other termination benefits.
Previous wording
Interest expense for the three and six months ended June 30, 2025, and 2024 was related to our financing lease obligation for our Cranbury, NJ facility.
Current wording
Interest expense for the three and nine months ended September 30, 2025, and 2024 was related to our financing lease obligation for our Cranbury, NJ facility.
Previous wording
Interest and other income for the six months ended June 30, 2025, was related to interest earned from investments and cash equivalents. Interest and other income for the six months ended June 30, 2024, was related to interest earned from investments and cash equivalents and reduced fair value of warrant liability.
Current wording
Interest and other income for the three and nine months ended September 30, 2025, was related to interest earned from investments and cash equivalents. Interest and other income for the three and nine months ended September 30, 2024, was related to interest earned from investments and cash equivalents and reduced fair value of warrant liability.
Previous wording
There have been no material changes in our critical accounting policies and estimates in the preparation of our consolidated financial statements during the six months ended June 30, 2025, compared to those disclosed in our 2024 Form 10-K.
Current wording
There have been no material changes in our critical accounting policies and estimates in the preparation of our consolidated financial statements during the nine months ended September 30, 2025, compared to those disclosed in our 2024 Form 10-K.
Rearranged current paragraphs (1)
Current report — wording carried from elsewhere
In June 2025, the company received FDA clearance of an IND application for RP-A701, an AAV.rh74-based gene therapy candidate for the treatment of BAG3-DCM. Following, the FDA granted Fast Track designation to RP-A701 for the treatment of BAG3-DCM in July 2025. The first-in-human Phase 1 clinical trial will be a multi-center, dose-escalation study designed to evaluate the safety, biological activity, and preliminary efficacy of RP-A701 in adults with BAG3-DCM.
Rearranged previous paragraphs (1)
Previous report — wording carried elsewhere
LAMP2 gene expression in endomyocardial biopsy samples is measured via both immunohistochemistry and Western blot and confirms the presence of LAMP2 protein in DD cardiac tissue following RP-A501 treatment.