Financial Performance - As of March 31, 2025, Cabaletta Bio, Inc. reported total assets of 165,141,000,adecreaseof10.8185,046,000 on December 31, 2024[15]. - The company incurred a net loss of 35,943,000forthethreemonthsendedMarch31,2025,comparedtoanetlossof25,047,000 for the same period in 2024, representing a 43.5% increase in losses year-over-year[18]. - The net loss per share for the three months ended March 31, 2025, was 0.71,comparedto0.51 for the same period in 2024[18]. - The accumulated deficit as of March 31, 2025, reached 385,044,000,anincreasefrom349,101,000 at the end of 2024[15]. - The total stock-based compensation for the three months ended March 31, 2025, was 5.16million,comparedto3.79 million for the same period in 2024, reflecting a 36% increase[91]. - The net loss for Q1 2025 was reported at 35,943,000,comparedtoanetlossof25,047,000 in Q1 2024, indicating increased operational expenditures[71]. - For the three months ended March 31, 2025, total operating expenses increased to 37.1millionfrom28.0 million in the same period of 2024, representing a change of 9.1million[144].−Cashusedinoperatingactivitieswas30.8 million for Q1 2025, compared to 24.0millioninQ12024,indicatinganincreaseof6.8 million[161]. - As of March 31, 2025, the company had 131.8millionincashandcashequivalents,whichisexpectedtofundoperationsintothefirsthalfof2026[149].ResearchandDevelopment−Researchanddevelopmentexpensesincreasedto29,018,000 for the three months ended March 31, 2025, up 32.3% from 21,954,000intheprioryear[18].−ResearchanddevelopmentexpensesforQ12025totaled28,973,000, a significant increase from 18,000,000inQ12024,reflectingariseinpersonnelandclinicaltrialcosts[71].−Researchanddevelopmentexpensesroseto29.0 million in Q1 2025, up from 22.0millioninQ12024,markinganincreaseof7.1 million[145]. - The company anticipates continued increases in research and development and general administrative expenses, with a need for additional funding to support operations[153]. - The company plans to raise additional capital through equity offerings, debt financings, and strategic alliances to fund its operations[32]. - The company expects to incur additional losses in the future as it continues its research and development efforts and will need to raise additional capital[32]. Clinical Trials and Product Development - The FDA granted clearance for the rese-cel IND application for systemic lupus erythematosus (SLE) treatment, affecting an estimated 320,000 patients in the U.S. and 150,000 in Europe, with approximately 40% of SLE patients experiencing lupus nephritis (LN)[103]. - The RESET-SLE Phase 1/2 clinical trial is designed to treat 12 patients, with a single weight-based dose of 1.0 x 10^6 cells/kg, and is open for enrollment across multiple sites in the U.S. and one in the EU[103]. - The FDA granted Fast Track Designation for rese-cel for SLE and LN, and the RESET-Myositis trial is actively enrolling patients with three myositis subtypes, affecting approximately 70,000 patients in the U.S. and 85,000 in Europe[104]. - The RESET-SSc trial for systemic sclerosis (SSc) is designed to treat 12 patients, with SSc affecting approximately 90,000 patients in the U.S. and 60,000 in Europe[105]. - The RESET-MG trial for generalized myasthenia gravis (gMG) is open for enrollment, targeting approximately 55,000 patients in the U.S. and 100,000 in Europe[107]. - As of May 9, 2025, 44 patients are enrolled and 23 patients have been dosed across multiple Phase 1/2 disease cohorts in the RESET clinical development program[118]. - The company is collaborating with Cellares Corp. to evaluate an automated manufacturing platform, with successful integration of the Cell Shuttle™ into the manufacturing strategy for rese-cel[120]. - The company plans to implement two registrational cohorts in the RESET-Myositis trial, each evaluating approximately 15 patients, with a focus on achieving a broad label for myositis treatment[116]. Financial Position and Liabilities - Total current liabilities rose to 33,989,000asofMarch31,2025,comparedto27,086,000 on December 31, 2024, indicating a 25.4% increase[15]. - The company has an accumulated deficit of 385.0millionasofMarch31,2025,indicatingongoingfinancialchallenges[152].−Futureleasepaymentsundernon−cancelableleasesasofMarch31,2025,total25,444,000 for finance leases and 5,939,000foroperatingleases[79].−Thecompanyhasnooff−balancesheetrisks,suchasforeignexchangecontractsorotherhedgingarrangements,ensuringastraightforwardfinancialposition[37].−ThecompanyhasnotrecordedanyincometaxbenefitsforthethreemonthsendedMarch31,2025,duetothelikelihoodofnotrecognizingdeferredtaxbenefits[95].RisksandChallenges−Thecompanyhasnotyetestablishedsalesandmarketingcapabilities,whichwillbecrucialuponobtainingregulatoryapprovaltogainmarketacceptance[192].−Theregulatoryapprovalprocessforthecompany′snovelproductcandidatesiscomplexandmaytakelongerthanexpected,withpotentialdelaysincommercialization[190].−PatientsreceivingTcell−basedimmunotherapiesmayexperienceseriousadverseevents,whichcouldnegativelyaffecttheclinicaldevelopmentandcommercialpotentialofthecompany′sproductcandidates[193].−Thecompanyfacesinherentproductliabilityrisksduringclinicaltesting,whichcouldleadtosubstantialliabilitiesandlimitcommercializationefforts[209].−Thecompanycurrentlydoesnotholdproductliabilityinsuranceforcommercialization,whichcouldinhibittheabilitytomarketproductsifclaimsarise[210].−AdverseeventsfromCARTcelltherapieshaveresultedinpatientdeaths,indicatingsignificantrisksassociatedwithcurrentandfutureproductcandidates[213].−Thecompanyisearlyinitsdevelopmenteffortsandmayfacesignificantdelaysinclinicaltrialsifsuitabledosesarenotidentified[188].−ThecompanymustnavigatevariabilityinTcellqualityandquantity,whichcouldaffectthereliabilityofmanufacturingitsproductcandidates[186].AgreementsandCollaborations−TheCompanyiscommittedtopayupto2,250,000 under the CARTA Services Agreement for cell processing manufacturing through December 31, 2025[54]. - The IASO Agreement includes an upfront payment of 2.5millionandpotentialtotalconsiderationofupto162 million based on milestone achievements[123]. - The Company entered into a License and Supply Agreement with Oxford Biomedica, which includes an upfront fee and potential regulatory and sales milestone payments in the low tens of millions[124]. - The Company has entered into a Development and Manufacturing Services Agreement with Lonza for a term of 12 months, with the ability to extend, focusing on the CAR-T cell therapy product rese-cel[62]. - An Option and License Agreement with Autolus was established, requiring an upfront license fee of 1,200,withpotentialregulatorymilestonesofupto12,000 for each licensed target and sales milestones totaling up to $15,000[59].