Brian Sullivan
Analyst · Jefferies
Thank you, Jodi, and good afternoon, everyone. Thank you for joining our first quarter 2026 operating and financial update conference call. We continue to make great progress as we prepare for the potential approval and commercial launch of gedatolisib in the third quarter. Achieving these milestones would be a pivotal moment for the women with advanced breast cancer who need new therapeutic options. With the groundbreaking data we have previously reported from the wild-type cohort and the recent announcement of positive data from the mutant cohort of our VIKTORIA-1 study, we believe gedatolisib is well positioned to become the new standard of care second-line therapy for patients with HR-positive/HER2-negative advanced breast cancer. It's been an eventful past few months for Celcuity. Last week, we reported positive top line results for the PIK3CA mutant cohort of the Phase III VIKTORIA-1 clinical trial, and we look forward to presenting detailed results at a late-breaking abstract oral session at the 2026 ASCO meeting on June 2. Given the timing of our ASCO presentation, we'll not be answering questions regarding these results during the Q&A portion of our call. Second, this morning, we announced 2 important updates to our clinical development plan. First, we announced the expansion of our Phase III VIKTORIA-2 trial to include a second study evaluating gedatolisib as first-line treatment in patients with endocrine-sensitive HR-positive, HER2-negative advanced breast cancer. We're now positioned to evaluate nearly all patients in the first-line setting, irrespective of their endocrine sensitivity or PIK3CA status. And this offers the potential to advance the standard of care for the approximately 90,000 women each year who are newly diagnosed in the U.S. with HR-positive/HER2-negative advanced breast cancer. And secondly, we also announced this morning that we are advancing the development of a gedatolisib formulation for subcutaneous injection and that we have submitted our first patent application to the U.S. Patent and Trademark Office. The subcutaneous formulation is aimed at supporting potential future indications for gedatolisib regimens that may result in duration of treatment periods greater than several years. And finally, we remain optimistic about the outcome of the FDA's review of our NDA, assuming our NDA is approved, we intend to submit the FDA a supplemental new drug application based on the results of the PIK3CA mutant cohort, VIKTORIA-1 and to submit VIKTORIA-1 data for both the mutant and wild-type cohorts to other global regulatory authorities following the sNDA submission. Turning now to the top line results for the PIK3CA mutant cohort. The primary efficacy analysis of gedatolisib combined with fulvestrant and palbociclib, which we refer to as the gedatolisib triplet, demonstrated a statistically significant and clinically meaningful improvement in progression-free survival compared to alpelisib, which is a PI3K-alpha inhibitor and fulvestrant. The secondary endpoint of gedatolisib combined with fulvestrant, which we refer to as the gedatolisib doublet, which was not part of the primary efficacy analysis in a hierarchical order, demonstrated a statistically significant and clinically meaningful improvement in PFS compared to alpelisib and fulvestrant. Both gedatolisib regimens were generally well tolerated with manageable safety profiles and no new safety signals. When considered alongside previously presented data from the VIKTORIA-1 PIK3CA wild-type cohort, the gedatolisib regimens have now demonstrated the potential to improve the standard of care in the second-line setting regardless of the PIK3CA status of a patient's tumor. We believe the results from the VIKTORIA-1 study validate our pioneering approach to targeting cancers involving the PI3K/AKT/mTOR or PAM pathway. And researchers have sought for nearly 20 years to develop a drug that blockades this pathway comprehensively without inducing unacceptable levels of toxicity. VIKTORIA-1 represents the first Phase III study that demonstrate that comprehensively blocking the PAM pathway can significantly improve outcomes for patients with PIK3CA mutations compared to therapies only targeting a single component of this pathway. Now as we've previously reported, the VIKTORIA-1 PIK3CA wild-type cohort set several new benchmarks for clinical trials evaluating patients with HR-positive/HER2-negative advanced breast cancer. The hazard ratios for the gedatolisib triplet and doublet were more favorable than has ever been reported by any Phase III trial for patients with HR-positive HER2-negative advanced breast cancer. 7.3 months incremental improvement in median PFS for the gedatolisib triplet over fulvestrant is higher than has ever been reported by any Phase III trial for patients with HR-positive/HER2-negative advanced breast cancer receiving at least their second line of endocrine therapy. And the 17.5 months of median duration of response for the gedatolisib triplet and 31% incremental increase in the objective response rate relative to the control for the gedatolisib triplet are the highest reported for an endocrine therapy-based regimen in the second-line setting. Now both regimens were found to have a manageable safety profile that was well tolerated by patients as evidenced by the 2% and 3% adverse event-related discontinuation rates for the triplet and doublet, respectively. We've also previously reported safety and tolerability-related analyses. In particular, for patients who experienced stomatitis, we reported that measures to mitigate it were generally effective. The median time to improvement from first onset to a lower grade of stomatitis for patients with Grade 2 or Grade 3 stomatitis who received the gedatolisib triplet was 12 and 14 days, respectively. Now to characterize the overall tolerability of the gedatolisib regimens, we reported results from patient-reported outcomes that capture a patient's perception of their overall well-being. A particular note was the stability of the patient's assessment of their well-being relative to their well-being prior to starting treatment with gedatolisib. Over the first 8 cycles of treatment with gedatolisib, patients reported no degradation in their sense of well-being, which we believe provides meaningful evidence that patients treated with gedatolisib tolerated it well. Now let's talk about our VIKTORIA-2 study. Results from the PIK3CA wild-type mutation cohort of our VIKTORIA-1 study demonstrated the benefit of gedatolisib combination treatment in the second-line setting of HR-positive/HER2-negative advanced breast cancer. And these results confirm the role the PAM pathway plays in patients with or without PIK3CA mutations and the importance of multi-target inhibition of this pathway. Additionally, results from our Phase Ib clinical trial provided strong evidence that the PAM pathway is also an important disease driver in treatment-naive patients with advanced breast cancer. In the early phase study that we performed, we evaluated gedatolisib plus palbociclib and letrozole as first-line treatment in patients with endocrine-sensitive HR-positive/HER2-negative advanced breast cancer. Median progression-free survival or PFS was 48.6 months, which compares favorably to historical data of approximately 25 months for ribociclib plus letrozole and the objective response rate was 79%, which again compares favorably to historical data of 53% for ribociclib plus letrozole. In light of the positive results for the PIK3CA wild-type and mutant cohorts of VIKTORIA-1 and the promising preliminary data for gedatolisib triplet in first-line treatment, we have high confidence that we can successfully develop gedatolisib triplet for nearly all patients in the first-line setting, irrespective of their endocrine sensitivity or PIK3CA status. Successful development in the first-line setting would offer the potential to advance the standard of care for the approximately 90,000 women each year who are diagnosed with late-stage HR-positive, HER2-negative advanced breast cancer in the United States. So to achieve this goal, we amended several important elements of the VIKTORIA-2 study design. First, VIKTORIA-2 will now evaluate the safety and efficacy of patients with endocrine-sensitive HR-positive, HER2-negative advanced breast cancer in addition to those with endocrine-resistant disease. which was the original study. Endocrine-sensitive patients represent approximately 2/3 or 60,000 of the 90,000 women in the U.S. newly diagnosed with advanced breast cancer each year. Current standard of care therapies for these patients provide median PFS of approximately 25 months. And patients will be assigned manually according to their endocrine sensitivity status to either study 1 if they're endocrine resistant or Study 2 if they're endocrine-sensitive and subsequently be randomized to a treatment arm. Each study will have independent statistical analysis plans that will include separate primary endpoints. Second, the primary efficacy analysis for both Study 1 and Study 2 of VIKTORIA-2 will evaluate the entire intent-to-treat population enrolled in their respective study. Primary endpoints for patient cohorts based on their PIK3CA status are no longer included. And this revision of the primary analysis allowed us to reduce the sample size for Study 1. The endocrine-resistant study from 638 patients to 440 patients without affecting the power of the analysis. And third, the control arms for Study 1 and Study 2 will evaluate ribociclib combined with either fulvestrant for Study 1 or letrozole for Study 2. Study 1 will enroll patients with treatment-naive endocrine-resistant advanced breast cancer. And these are women whose breast cancer progressed while receiving or within 12 months of completing adjuvant endocrine therapy. It's a more aggressive disease. The trial will evaluate the efficacy and safety of gedatolisib combined with palbo and fulvestrant in Arm A and compare that to ribociclib combined with fulvestrant in Arm B. We expect to have top line data by the end of 2028 for this study. Study 2 is expected to enroll approximately 740 subjects with treatment-naive endocrine-sensitive advanced breast cancer. And these are women whose cancer relapse or progressed 12 months or more after completion of adjuvant endocrine therapy or those with de novo metastatic disease who've had no prior endocrine therapy exposure. The trial will evaluate the efficacy and safety of gedatolisib combined with palbociclib and letrozole and compare itself to ribociclib combined with letrozole. The clinical trial primary endpoints for the VIKTORIA-2 clinical trial are progression-free survival for RECIST 1.1 criteria as assessed by blinded independent central review. And we expect top line data for the Study 2 in the endocrine-sensitive patients to be available by 2030. And prior to finalizing this amended Phase III trial design, we conducted a Type B meeting with the FDA to obtain their feedback and to gain alignment on these planned amendments. Now knowing that our life cycle plan would eventually include indications that may offer several years of progression-free survival benefit, we initiated a program to develop a subcutaneous formulation of gedatolisib that would enable a patient to receive gedatolisib as an injection as an alternative to an infusion. And this program is ongoing with the goal of demonstrating clinical equivalence to the current intravenous formulation of gedatolisib. And this work has resulted in a submission to the United States Patent and Trademark Office of our first patent application for an injectable formulation of gedatolisib. Now let's turn to our Phase Ib/II trial that's evaluating gedatolisib in combination with darolutamide in men with metastatic castration-resistant prostate cancer. We presented data for the Phase Ib portion of the study at a poster presentation at ESMO last year. And in this portion of the trial, 38 patients were randomly assigned to receive standard doses of darolutamide twice daily and either 120 milligrams of gedatolisib in Arm 1 or 180 milligrams of gedatolisib in Arm 2. The combination of gedatolisib and darolutamide was generally well tolerated in the trial and mostly low-grade treatment-related adverse events. No dose-limiting toxicities were observed in either arm and no patients discontinued study treatment due to an adverse event. For all patients treated, the 6-month radiographic PFS rate was 67% and the median radiographic PFS was 9.1 months. And these results compare favorably to historical results of a 40% 6-month radiographic PFS rate for patients with metastatic castration-resistant prostate cancer who were treated with an androgen receptor inhibitor as second-line treatment. Now enrollment of patients in the dose escalation portion of the trial is ongoing. We expect to provide a data update at an upcoming medical conference. Now as we near what we hope is an FDA approval for gedatolisib in 2026, our efforts to prepare for the potential launch of gedatolisib continue to ramp up for our strategic launch plan, and we began laying the groundwork for a potential gedatolisib launch over 24 months ago. Last call, we mentioned that we had largely completed building the commercial organization, except for the sales force. I'm excited to report now that we have since hired and onboarded all of our oncology sales specialists. They are a very experienced crew. On average, these individuals have 24 years of experience selling pharmaceuticals and 16 years of experience in oncology. They're an incredibly talented group of individuals who have a strong track record of successfully launching novel oncology therapeutics. Key efforts today include continuing our extensive outreach across the country to payers, strategic accounts, which include health systems, integrated delivery networks and community oncology practices. We're also very encouraged by the results of research we continue to field to gauge the willingness of community and academic oncologists to prescribe gedatolisib should it get approved. And these results make us optimistic about the possibility of establishing gedatolisib as the new standard of care in the second-line setting for HR-positive/HER2-negative advanced breast cancer in the wild-type patient population. Now with positive results from our study with patients whose tumors have PIK3CA mutations, we expect the gedatolisib combination regimens to be uniquely positioned to provide second-line therapy for patients regardless of the PIK3CA mutation status. Based on the analysis of published epidemiological data, we estimate there are 37,000 patients in the U.S. receiving second-line treatment for HR-positive/HER2-negative advanced breast cancer. And using internal duration of treatment estimates and pricing assumptions consistent with currently available novel therapeutics for breast cancer, we estimate the total addressable market for gedatolisib in the second-line setting is more than $5 billion annually. Given the significant penetration our research is suggesting we can achieve, we believe it's reasonable to estimate that a second-line indication for gedatolisib can potentially generate peak revenue of up to $2.5 billion annually. And so the progress we've made today is encouraging, and we look forward to providing you with updates over the next few quarters. Gedatolisib is well positioned to address critical needs in the second-line space with its unique mechanism of action and potential first-in-class and best-in-class safety and efficacy profile. And this gives us an exciting opportunity to advance potential blockbuster indications in breast cancer and prostate cancer, while also aggressively preparing for and potentially launching gedatolisib commercially should we receive FDA approval. And now I'd like to hand the call over to Vicky to review our finances.