Neurology Pipeline and Programs - Sangamo is focused on developing genomic medicines for debilitating neurological diseases, leveraging its zinc finger epigenetic regulation technology and AAV capsid discovery platform[3, 4] - ST-503 for small fiber neuropathy (SFN) is in Phase 1/2 clinical trials, with preliminary efficacy data expected in Q1 2027, targeting a market impacting 650,000 people across the US, Europe and Japan[12, 18, 19, 64, 65] - ST-506 for prion disease is advancing towards a CTA submission expected as early as mid-2026, with preliminary efficacy data anticipated from mid-2027, addressing a condition resulting in 1,500 deaths per year across the US, Europe and Japan[12, 21, 22, 33, 87] - The STAC-BBB capsid has demonstrated industry-leading CNS tropism in NHPs, with 700-fold higher transgene expression than benchmark capsid AAV9, and is the subject of license agreements with Genentech, Astellas and Lilly[25, 27, 92] Financial Highlights and Partnerships - Sangamo has received $88 million in cash from STAC-BBB partners to date, with up to $46 billion in potential future milestones and exercise fees assuming exercise of all options and targets, plus additional potential product royalties[26] - As of September 30, 2025, Sangamo had approximately $296 million in cash and cash equivalents, which is expected to fund planned operations into Q1 2026[34, 36] - Sangamo anticipates non-GAAP operating expenses for 2025 to be in the range of $125 million to $145 million[36] - Pfizer exercised a buyout option for a license to use certain zinc finger modified cell lines, resulting in $6 million payment to Sangamo[34] Fabry Disease Program - Positive clinical data from the registrational STAAR study in Fabry disease showed a positive mean annualized eGFR slope of 1965 mL/min/173m2/year (95% CI: -0153, 4083) at 52-weeks across all 32 dosed patients[33] - Sangamo is preparing for an anticipated BLA submission for Isaralgagene civaparvovec as early as the first quarter of 2026, while continuing business development discussions for a Fabry commercialization agreement[28, 33, 124]

Core Insights - The company is advancing its clinical pipeline, particularly focusing on isaralgagene civaparvovec for Fabry disease, with a meeting held with the FDA to discuss the use of eGFR slope as an endpoint for accelerated approval [1][12] - The registrational STAAR study has shown promising clinical data, indicating that isaralgagene civaparvovec may provide durable treatment benefits for Fabry disease, with patient recruitment ongoing for the Phase 1/2 STAND study in chronic neuropathic pain [2][4] - Financial results for Q3 2025 show a significant decrease in revenues and a net loss, with total revenues of $0.6 million compared to $49.4 million in Q3 2024, primarily due to a collaboration agreement with Genentech recorded in the previous year [9][10] Clinical Developments - The STAAR study reported a positive mean annualized eGFR slope of 1.965 mL/min/1.73m²/year at 52 weeks across 32 patients, indicating the treatment's effectiveness [6] - Improvements in disease severity were noted, with 22 patients showing enhancements in their total MSSI score at 12 months [7] - The company is preparing for a potential Biologics License Agreement (BLA) submission for isaralgagene civaparvovec as early as Q1 2026 [12] Financial Performance - The consolidated net loss for Q3 2025 was $34.9 million, or $0.11 per share, compared to a net income of $10.7 million, or $0.04 per share, in Q3 2024 [9][29] - Total operating expenses for Q3 2025 were $36.1 million, a decrease from $38.8 million in the same period in 2024, driven by lower personnel costs and licensing expenses [13][14] - As of September 30, 2025, cash and cash equivalents stood at $29.6 million, down from $41.9 million at the end of 2024, with expectations to fund operations into Q1 2026 [15][30] Regulatory and Corporate Updates - The company held a productive interaction with the Medicines and Healthcare products Regulatory Agency (MHRA) regarding a prion disease study, anticipating a Clinical Trial Application (CTA) submission [3][12] - A $6 million payment was received from Pfizer for a buyout option related to a 2008 license agreement, enhancing the company's financial position [6] - The company continues to focus on establishing partnerships for the commercialization of its Fabry disease program while advancing its neurology pipeline [17][21]

Neurology Focus and Technology - Sangamo is focused on developing genomic medicines for debilitating neurological diseases[3, 135] - The company utilizes potent zinc finger epigenetic regulation technology and an industry-leading AAV capsid discovery platform for brain delivery[4, 136] - STAC-BBB capsid has demonstrated robust penetration of the blood-brain barrier and widespread transgene expression throughout the brain in NHPs, showing up to 700-fold higher transgene expression than benchmark capsid AAV9[22, 24, 98] Pipeline and Milestones - Phase 1/2 STAND study of ST-503 for idiopathic small fiber neuropathy (iSFN) has initiated, with patient dosing expected in Fall 2025 and preliminary proof of efficacy data anticipated in Q4 2026[12, 16, 33, 38] - CTA submission for ST-506 in prion disease is anticipated as early as mid-2026, with clinical trial enrollment and dosing expected in late-2026 and preliminary clinical data in mid-2027[12, 19, 33, 38, 94] Fabry Disease Program - Positive topline results from the registrational STAAR study in Fabry disease showed a positive mean annualized eGFR slope of 1.965 mL/min/1.73m2/year at 52 weeks across all 32 dosed patients[12, 29, 33, 38, 131] - A BLA submission for isaralgagene civaparvovec is expected as early as Q1 2026, with ongoing business development negotiations for a potential commercialization agreement[12, 27, 33, 38, 130, 131] Financial Status - The company had approximately $38.3 million in cash and cash equivalents as of June 30, 2025[34, 40] - Approximately $21 million in net proceeds were raised from an underwritten registered equity offering[34, 38] - Cash received from partners to date is $88 million[25] - Up to $4.6 billion in potential future milestones and exercise fees assuming exercise of all options and targets[25]

Neurology Pipeline and Technology - Sangamo's STAC-BBB capsid demonstrates industry-leading performance with 700-fold higher transgene expression than benchmark capsid AAV9[25] - ST-503 for chronic neuropathic pain is advancing with patient enrollment and dosing expected in mid-2025 and preliminary proof of efficacy data anticipated in Q4 2026[16, 35, 39] - Prion disease program is progressing with a CTA submission anticipated in Q1 2026 and preliminary clinical data expected in Q4 2026[12, 20, 35, 39] - ST-503 resulted in approximately 70% repression of the SCN9A gene in mice, reducing pain hypersensitivity[18] - Intrathecal delivery of ZFR in NHPs by AAV9 demonstrated up to 60% repression of SCN9A in dorsal root ganglia (DRG) tissue[18] Partnerships and Financials - Sangamo received an $18 million upfront license fee from Lilly for a capsid license agreement to deliver genomic medicines for up to five diseases of the CNS, with potential for up to $1.4 billion in additional licensed target fees and milestone payments, plus tiered royalties on potential net sales[30, 36] - STAC-BBB partnerships have the potential for up to $4.6 billion in future milestones and exercise fees, assuming exercise of all options and targets, plus additional potential product royalties[26] - As of March 31, 2025, Sangamo had approximately $25.2 million in cash and cash equivalents[36] Fabry Disease Program - A potential BLA submission for Isaralgagene civaparvovec is anticipated as early as the first quarter of 2026[13, 28, 35, 39] - All dosed patients (32) in Phase 1/2 STAAR study data have now completed at least 52-weeks of follow-up, with preliminary analysis indicating a positive mean eGFR slope[35, 39, 130] - In the Phase 1/2 STAAR study, a positive mean eGFR slope of 3.061 mL/min/1.73m2/year (95% confidence interval: 0.863, 5.258) was observed in the 23 patients that have reached 1-year follow-up[136]