RPGR

LONDON, UK and CAMBRIDGE, MA, USA I October 15, 2024 I Beacon Therapeutics Holdings Limited (‘Beacon Therapeutics’ or ‘the Company’), a leading ophthalmic gene therapy company with a purpose to save and restore the vision of patients with blinding retinal diseases, today announced the presentation of 24-month interim safety and efficacy results of the Phase 2 SKYLINE trial in patients with XLRP at the American Academy of Ophthalmology’s Annual Meeting in Chicago, Illinois. The 24-month data showed a response rate of 57% (4/7) in study eyes treated with a high dose (6.8 E+11 vg/eye) of AGTC-501, defined as a patient who has an improvement in retinal sensitivity as assessed by microperimetry of at least 7 decibels (dB) in at least 5 loci. Patients in the high-dose cohort also showed a robust improvement in mean retinal sensitivity. Study eyes treated with a low dose (7.5 E+10 vg/eye) of AGTC-501 showed a response rate of 25% (1/4). There were no clinically significant safety events associated with AGTC-501 treatment in this trial, and any treatment-emergent adverse events were mostly non-serious and mild to moderate in severity. XLRP is a severe, aggressive, inherited retinal disease that often leads to blindness by middle age, with no treatment options available. XLRP primarily affects an estimated 3.4 – 4.4 per 100,000 young males with RPGR mutations in US, Europe and Australia. AGTC-501 expresses the full length RPGR protein and is therefore expected to address the entirety of photoreceptor damage caused by XLRP, including both rod and cone loss, making it uniquely well-suited to improve the lives of patients with XLRP as a potential treatment. Lance Baldo, MD, Chief Executive Officer of Beacon Therapeutics, stated, “Our Phase 2 SKYLINE 24-month data reinforces AGTC-501’s favorable safety profile and robust improvements in mean retinal sensitivity. We will continue to assess the long-term safety and durability of AGTC-501 but are encouraged by the results we’ve seen in the SKYLINE trial to date.” Beacon Therapeutics is also enrolling its pivotal Phase 2/3 VISTA and open-label Phase 2 DAWN trials as the Company progresses toward the development of a treatment for XLRP. Poster – Subretinal AGTC-501 Gene Therapy for XLRP: 24-Month Interim Results of the Phase 2 SKYLINE Trial. Presenting Author – Robert Sisk, MD, FACS, FASRS, Associate Professor of Ophthalmology at the University of Cincinnati; Vitreoretinal Surgeon and partner at Cincinnati Eye Institute; Director of Pediatric Retinal Surgery and Director of Ophthalmic Genetics at Cincinnati Children’s Hospital. Contact: info@beacontx.com Media: beacontherapeutics@edelman.com About Beacon Therapeutics Beacon Therapeutics is an ophthalmic gene therapy company founded in 2023 to save and restore the vision of patients with a range of prevalent and rare retinal diseases that result in blindness. The Company has an established scientific foundation that combines a late-stage development candidate to treat X-linked retinitis pigmentosa (XLRP), as well as two preclinical programs, one targeting dry age-related macular degeneration (AMD) and another targeting an inherited cone-rod dystrophy (CRD). Beacon Therapeutics also has access to a target generation technology platform that will identify, screen, and search secreted proteins in the ophthalmology space. Lead development candidate AGTC-501, is a gene therapy program currently being investigated for the treatment of XLRP, an inherited monogenic recessive disorder that causes progressive vision loss, primarily in boys and young men. XLRP is predominantly caused by mutations in the retinitis pigmentosa GTPase regulator (RPGR) gene. AGTC-501 expresses the full length RPGR protein, thereby addressing the full complement of photoreceptor damage caused by XLRP, including both rod and cone loss. Beacon is supported by funds from Syncona Limited, Forbion, Oxford Science Enterprises, TCGX, Advent Life Sciences and additional investors. Find out more about Beacon Therapeutics at beacontx.com. SOURCE: Beacon Therapeutics Holdings

LONDON and CAMBRIDGE, Mass., Sept. 19, 2024 /PRNewswire/ -- Beacon Therapeutics Holdings Limited ('Beacon' or 'the Company'), a leading ophthalmic gene therapy company with a purpose to save and restore the vision of patients with blinding retinal diseases, today presented 36-month interim results from its Phase I/2 HORIZON trial of its lead asset, AGTC-501, in patients with X-linked retinitis pigmentosa (XLRP) at the 24th EURETINA Congress held in Barcelona, Spain. Key presentation highlights included: AGTC-501 was reported to be generally safe and well-tolerated in the 29 patients enrolled with no clinically significant safety events related to the therapy. Data also demonstrated that a difference in visual function between the treated and untreated eyes was still observed at month 36. The benefit-risk profile of AGTC-501 supports ongoing clinical development for the treatment of patients with XLRP caused by RPGR mutations. Lance Baldo, MD, Chief Executive Officer of Beacon, stated, "This emerging longer-term data is another clinical validation of the safety of AGTC-501 for the treatment of XLRP. We look forward to achieving several upcoming clinical milestones, including 24-month data from the Phase 2 SKYLINE trial in XLRP later this year, and continued enrollment into our open-label Phase 2 DAWN trial and Phase 2/3 VISTA trial." HORIZON is a Phase 1/2, open-label, dose-escalation study of patients with XLRP treated with subretinal AGTC-501, which has completed enrollment of 29 male participants and all participants are in long-term follow-up. Presentation – Subretinal Gene Therapy Drug AGTC-501 for X-Linked Retinitis Pigmentosa (XLRP) Phase 1/2 Multicenter Study (HORIZON): 36-Month Interim Results Presenter – Paul Yang, MD, PhD, Chief, Paul H. Casey Ophthalmic Genetics Division, Casey Eye Institute, OHSU The presentation took place on Thursday, September 19th at 15:30 CEST. About Beacon Therapeutics Beacon Therapeutics is an ophthalmic gene therapy company founded in 2023 to save and restore the vision of patients with a range of prevalent and rare retinal diseases that result in blindness. The Company has an established scientific foundation that combines a late-stage development candidate to treat X-linked retinitis pigmentosa (XLRP), as well as two preclinical programs, one targeting dry age-related macular degeneration (AMD) and another targeting cone-rod dystrophy (CRD). Beacon Therapeutics also has access to a target generation technology platform that will identify, screen, and search secreted proteins in the ophthalmology space. Lead development candidate AGTC-501, is a gene therapy program currently being investigated for the treatment of XLRP, an inherited monogenic recessive disorder that causes progressive vision loss, primarily in boys and young men. XLRP is predominantly caused by mutations in the retinitis pigmentosa GTPase regulator (RPGR) gene. AGTC-501 expresses the full length RPGR protein, thereby addressing the full complement of photoreceptor damage caused by XLRP, including both rod and cone loss. Beacon is supported by funds from Syncona Limited, Forbion, Oxford Science Enterprises, TCGX, Advent Life Sciences and additional investors. Find out more about Beacon Therapeutics at beacontx.com. Contact: [email protected] Media: [email protected] SOURCE Beacon Therapeutics WANT YOUR COMPANY'S NEWS FEATURED ON PRNEWSWIRE.COM? 440k+ Newsrooms & Influencers 9k+ Digital Media Outlets 270k+ Journalists Opted In GET STARTED

Financing led by life sciences venture capital firm Forbion, alongside existing investors Syncona and Oxford Science Enterprises, as well as new investors TCGX and Advent Life Sciences Round will accelerate the development of lead asset AGTC-501 and broader pipeline Beacon appoints Dmitrij Hristodorov, Wouter Joustra, and Cariad Chester to Board of Directors; Dominic Schmidt joins as a Board Observer LONDON and CAMBRIDGE, Mass., July 3, 2024 /PRNewswire/ -- Beacon Therapeutics Holdings Limited ('Beacon Therapeutics' or 'the Company'), a leading ophthalmic gene therapy company with a mission to save and restore the vision of patients with blinding retinal diseases, today announced it has raised $170 million in Series B funding. Forbion led the financing, which included existing investors Syncona Limited, Oxford Science Enterprises and the University of Oxford, as well as initial investments from TCGX and Advent Life Sciences. The funds will be used to support the continued clinical development of Beacon's lead asset, AGTC-501 for X-Linked Retinitis Pigmentosa (XLRP) and generate Phase 1/2 clinical trial data for the Company's Dry Age-related Macular Degeneration (dAMD) program. Beacon Therapeutics also appointed Dmitrij Hristodorov and Wouter Joustra, General Partners of Forbion, and Cariad Chester, Managing Partner of TCGX, to its Board of Directors. Dominic Schmidt, General Partner of Advent Life Sciences, joins as a Board Observer. Beacon is focused on both orphan and prevalent diseases, including XLRP, a blinding orphan disease for which there is no available treatment, as well as dAMD. AGTC-501, the Company's lead asset, is currently in a registrational clinical trial for the treatment of XLRP. AGTC-501 expresses the full length RPGR protein, thereby addressing all photoreceptor damage caused by XLRP, including both rod and cone loss. David Fellows, Chief Executive Officer of Beacon Therapeutics, said, "We are focused on progressing our pipeline of ophthalmic gene therapies to save and restore the vision of patients with a range of prevalent and rare retinal diseases that result in blindness. I am confident that along with the addition of Dmitrij Hristodorov, Wouter Joustra and Cariad Chester to the Beacon Board, these funds will support the ongoing development of our late-stage and pre-clinical pipeline and enable acceleration of the development of AGTC-501 as we progress through the clinic and toward commercialization." "Forbion is pleased to support Beacon Therapeutics at this critical juncture in the development of its pipeline of pioneering ophthalmic gene therapies. Beacon's deep expertise and renowned management bench give us confidence in the plan to build a leading retinal gene therapy company," shared Dmitrij Hristodorov, General Partner at Forbion. Elisa Petris, Lead Partner at Syncona Investment Management Limited and Board Director of Beacon Therapeutics, said, "Syncona's continued backing of Beacon Therapeutics is a testament to the Company's proven leadership team and innovative approach to developing gene therapies for retinal diseases. This financing and the partnership of this high-quality syndicate will propel Beacon's pipeline and enable the Company to advance its programs for both rare and prevalent ophthalmic diseases." Beacon has raised approximately $290 million in funding to date. This funding round follows several clinical milestones for the company, including the first patient dosed in the VISTA registrational trial for AGTC-501, the initiation of the Phase II DAWN trial and the presentation of positive 12-month interim results of the Phase 2 SKYLINE trial at the 47th Annual Macula Society Meeting demonstrating the precision, effectiveness and safety of Beacon's therapeutic interventions. J.P. Morgan acted as sole placement agent to Beacon Therapeutics for this transaction. About Beacon Therapeutics Beacon Therapeutics is an ophthalmic gene therapy company founded in 2023 to save and restore the vision of patients with a range of prevalent and rare retinal diseases that result in blindness. The Company has an established scientific foundation that combines a late-stage development candidate to treat X-linked retinitis pigmentosa (XLRP), as well as two preclinical programs, one targeting dry age-related macular degeneration (AMD) and another targeting cone-rod dystrophy (CRD), an inherited retinal disease. Lead development candidate AGTC-501, is a gene therapy program currently being investigated for the treatment of XLRP, an inherited monogenic recessive disorder that causes progressive vision loss in boys and young men. XLRP is predominantly caused by mutations in the retinitis pigmentosa GTPase regulator (RPGR) gene. AGTC-501 expresses the full length RPGR protein, thereby addressing the full complement of photoreceptor damage caused by XLRP, including both rod and cone loss. Beacon Therapeutics also has access to a target generation technology platform that will identify, screen, and search secreted proteins in the ophthalmology space. Find out more about Beacon Therapeutics at beacontx.com. Contact: [email protected] Media: [email protected] SOURCE Beacon Therapeutics