Core Insights - ProQR Therapeutics reported strong financial and operational results for Q1 2025, highlighting a solid balance sheet and a focus on executing its RNA editing programs [2][5][8] Financial Performance - As of March 31, 2025, ProQR held cash and cash equivalents of €132.4 million, down from €149.4 million at the end of 2024 [8] - The net loss for Q1 2025 was €10.1 million, or €0.10 per diluted share, compared to a net loss of €7.7 million, or €0.09 per diluted share, for the same period last year [10][19] - Research and development costs increased to €12.3 million in Q1 2025 from €9.3 million in Q1 2024, while general and administrative costs decreased slightly to €3.2 million from €3.5 million [9] Business Updates - ProQR is on track to submit a Clinical Trial Application (CTA) for its lead RNA editing program, AX-0810, targeting NTCP for cholestatic diseases in Q2 2025, with initial clinical data expected in Q4 2025 [5][6] - The company has strengthened its leadership team with the appointments of Dennis Hom as Chief Financial Officer and Dr. Cristina Lopez Lopez as Chief Medical Officer [6][5] - ProQR achieved a milestone in its collaboration with Eli Lilly, earning $1.0 million (€918,000) during the first quarter [8] Upcoming Milestones - Key upcoming events include the CTA submission for AX-0810 in Q2 2025 and the first clinical data readout in Q4 2025 [5][6] - Other programs in the pipeline include AX-2402 for Rett Syndrome and AX-2911 for MASH, with clinical candidate selections expected in 2025 [6] Research and Development Focus - ProQR's Axiomer RNA editing technology is advancing across liver and CNS programs, with a focus on addressing cholestatic liver diseases and other conditions [5][11] - The company presented at the RNA Editing Gordon Research Conference and plans to showcase multiple abstracts at the upcoming ASGCT Annual Meeting [6]

Core Insights - Korro Bio, Inc. has appointed Dr. Loïc Vincent as Chief Scientific Officer, bringing over 20 years of drug development experience to the company [2][3] - The company is advancing multiple candidates in its pipeline, including KRRO-110, currently in Phase 1/2a clinical study for Alpha-1 Antitrypsin Deficiency [2] - Korro's RNA-editing platform aims to develop genetic medicines for both rare and prevalent diseases, enhancing precision and long-term tolerability [4] Company Overview - Korro Bio is a clinical-stage biopharmaceutical company focused on RNA editing to create genetic medicines [4] - The company utilizes an oligonucleotide-based approach to expand the reach of genetic therapies, leveraging established regulatory pathways [4] - Korro is headquartered in Cambridge, Massachusetts [4] Leadership Appointments - Dr. GaoZhong Zhu has joined as Senior Vice President of Chemistry, Manufacturing and Controls, with over 25 years of experience in pharmaceutical development [5] - Oliver Dolan has been promoted to Principal Accounting Officer, having served as Senior Vice President of Finance since January 2024 [5]

Financial Data and Key Metrics Changes - Revenue for Q4 2024 was $83.7 million, compared to $29.1 million in Q4 2023, while full-year revenue was $108.3 million versus $113.3 million in 2023, indicating a significant quarter-over-quarter increase primarily due to deferred revenue recognition from the Takeda collaboration [34][35] - R&D expenses increased to $44.6 million in Q4 2024 from $34.1 million in Q4 2023, and for the full year, R&D expenses rose to $159.7 million from $130.0 million in 2023, driven by new program spending [34] - The net income for Q4 2024 was $29 million, a turnaround from a net loss of $16.3 million in the prior year, while the full-year net loss was $96.7 million compared to $57.5 million in 2023 [34][35] - Cash and cash equivalents at year-end 2024 were $302.1 million, up from $200.4 million at the end of 2023, primarily due to financing proceeds and milestone payments [35] Business Line Data and Key Metrics Changes - The company advanced its WVE-007 program for obesity, with initial data expected in the second half of 2025, indicating progress in clinical trials [6][10] - WVE-006 for AATD showed a mean increase of 6.9% micromolar circulating AAT and 10.8% micromolar total AAT two weeks post single dose in the first patient study, demonstrating the potential for effective treatment [11][12] - In DMD, the company is on track to deliver 48-week data from its forward 53 clinical trial, with previous data showing a mean muscle content adjusted dystrophin of 9% [14][16] Market Data and Key Metrics Changes - The obesity treatment market is highlighted as having over 1 billion people globally, with WVE-007 positioned as a potential best-in-class treatment due to its unique mechanism of action [8][9] - The Huntington's disease market impacts over 200,000 people in the US and Europe, with the company emphasizing the importance of early intervention and allele-specific therapies [17][19] Company Strategy and Development Direction - The company is focused on RNA medicines, with a commitment to advancing its pipeline, including WVE-007 for obesity and WVE-006 for AATD, aiming to address significant unmet medical needs [5][6] - The strategy includes leveraging unique mechanisms of action to differentiate from existing therapies, particularly in obesity and genetic diseases [28][29] - The company plans to initiate clinical development of additional RNA editing programs in 2026, expanding its therapeutic reach [13][30] Management's Comments on Operating Environment and Future Outlook - Management expressed optimism about the company's trajectory in 2025, anticipating multiple value-accretive milestones across clinical programs [37] - The management highlighted the importance of addressing the limitations of current obesity treatments and the potential for WVE-007 to provide a sustainable weight loss solution [9][28] - There is a strong focus on regulatory engagement and the potential for accelerated pathways for DMD and Huntington's disease therapies [56][62] Other Important Information - The company has seen increased demand for participation in its clinical studies, particularly for WVE-006, indicating strong interest from both clinicians and patients [12] - The management emphasized the importance of tracking M-protein levels as a key indicator of therapeutic efficacy in AATD treatments [41][45] Q&A Session Summary Question: Can you provide more information on WVE-006's baseline protein levels? - Management indicated that the baseline was below the lower limit of detection, and emphasized tracking M-protein levels as a key metric for therapeutic impact [39][41] Question: How will DEXA scanning be used in the WVE-007 study? - Management confirmed that DEXA scans will be used to assess fat loss versus muscle mass changes, with the goal of demonstrating healthy weight loss [46][47] Question: What are the expectations for the upcoming DMD data readout? - Management confirmed ongoing discussions with regulators regarding the 48-week data and emphasized the importance of understanding dystrophin kinetics over time [51][55] Question: How does the company view the potential for mutant huntingtin lowering as a surrogate endpoint in Huntington's disease? - Management expressed that if the FDA accepts mutant huntingtin lowering as a clinical surrogate, it would be beneficial for the field and the company [60][62] Question: What has changed regarding the prevalence of Huntington's disease? - Management explained that recent research has shown that Huntington's disease begins before symptom onset, leading to a higher estimated prevalence [63][65] Question: How should we think about dosing for RNA editing versus DNA editing? - Management highlighted that dosing should be viewed in terms of efficacy and durability, with ongoing exploration of optimal dosing regimens [91][97]

Table of Contents As filed with the Securities and Exchange Commission on May 14, 2024 Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 KORRO BIO, INC. (Exact name of registrant as specified in its charter) (State or other jurisdiction of incorporation or organization) Kingsley L. Taft, Esq. Marianne C. Sarrazin, Esq. Goodwin Procter LLP 100 Northern Avenue Boston, MA 02210 (617) 570-1000 Approximat ...

Table of Contents As filed with the Securities and Exchange Commission on May 14, 2024 Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 KORRO BIO, INC. (Exact name of registrant as specified in its charter) (State or other jurisdiction of incorporation or organization) Delaware 2834 47-2324450 (Primary Standard Industrial Classification Code No.) (I.R.S. Employer Identification Number) One Kendall S ...

Table of Contents As filed with the Securities and Exchange Commission on December 20, 2023 Registration No. 333-275353 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 AMENDMENT NO. 2 to FORM S-3 on FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 KORRO BIO, INC. (Exact name of registrant as specified in its charter) (State or other jurisdiction of incorporation or organization) Delaware 2834 47-2324450 (Primary Standard Industrial Classification Code No.) One Kendall ...

Table of Contents to FORM S-3 on FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 KORRO BIO, INC. (Exact name of registrant as specified in its charter) (State or other jurisdiction of incorporation or organization) As filed with the Securities and Exchange Commission on December 20, 2023 Registration No. 333-275353 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 AMENDMENT NO. 2 Delaware 2834 47-2324450 (Primary Standard Industrial Classification Code No.) One Kendall ...

Table of Contents As filed with the Securities and Exchange Commission on December 1, 2023 Registration No. 333-275353 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 AMENDMENT NO. 1 to FORM S-3 on FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 KORRO BIO, INC. (Exact name of registrant as specified in its charter) (State or other jurisdiction of incorporation or organization) Delaware 2834 47-2324450 (Primary Standard Industrial Classification Code No.) One Kendall ...

Table of Contents As filed with the Securities and Exchange Commission on December 1, 2023 Registration No. 333-275353 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 AMENDMENT NO. 1 to FORM S-3 on FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 KORRO BIO, INC. (Exact name of registrant as specified in its charter) (State or other jurisdiction of incorporation or organization) Delaware 2834 47-2324450 (Primary Standard Industrial Classification Code No.) One Kendall ...