CABA - Earnings announcements

– CABA-201 safety profile suggests favorable risk-benefit with no CRS or ICANS in the majority of patients; low-grade CRS in three of eight patients and one previously reported ICANS event – – Compelling clinical responses observed in lupus and myositis patients with up to six months of follow-up; first SSc patient demonstrated an emerging, drug-free clinical response – – All eight patients with active, refractory autoimmune disease discontinued all immunosuppressants prior to CABA-201 infusion and through the follow-up period – – Consistent and complete B cell depletion observed in all patients within the first month after CABA-201 infusion; evidence of transitional naïve B cell repopula

– Clinical data from the RESET-Myositis™ and RESET-SLE™ trials, along with initial clinical data from the RESET-SSc™ trial, to be presented this weekend in oral and poster presentations at ACR Convergence 2024 – – 16 patients enrolled with 10 patients dosed as of November 12 across the RESET™ clinical development program; 40 U.S. clinical sites actively recruiting patients – – Data permitting, anticipate meeting with the FDA in 2025 regarding potential registrational program designs for CABA-201 – – Clinical development expanding efficiently into Europe with EMA CTA authorization for CABA-201 received in lupus; Gerwin Winter appointed as Senior VP and Head of International – – Cash, cash

– No CRS, ICANS, infections or serious adverse events observed in either of the first two patients through data cut-off of May 28, 2024 – – CABA-201 exhibited anticipated profile of CAR T cell expansion and contraction with complete B cell depletion observed in both patients by day 15 post-infusion – – Improvements in both patients' specific disease measures, consistent with academic experience of a similar 4-1BB CD19-CAR T, suggest emerging clinical benefit with CABA-201 while discontinuing all disease-specific therapies other than a planned steroid taper in one patient – – Immature, naïve B cell repopulation in first IMNM patient observed at week 8 consistent with a potential immu