Michael Glen Kauffman
Analyst
Thank you, Dan. Now I will cover key highlights from our VS-7375 R&D update in October. If you haven't viewed the webcast, I urge you to visit our website to watch the replay or review the slide presentation. We think you will find the clinical data quite compelling. VS-7375 is a highly selective, potent oral dual KRAS G12D on/off inhibitor with a long residence time on the target. These attributes are key to a strong efficacy and tolerability profile that may provide deeper tumor reductions and improved quality of life compared with pan-RAS inhibitors for patients fighting difficult-to-treat cancers, such as pancreatic cancer. As Dan Paterson said, we have set a new KRAS G12D benchmark for a potential best-in-class profile with both compelling efficacy and a highly manageable tolerability profile. Progress in our CRC cohort is in an earlier stage, but we've shown that we can combine with EGFR inhibitors and are seeing early antitumor activity. In lung, while the data we've shared to date is at 600 milligrams and our go-forward dose is 900 milligrams, as more data are generated, we expect to see the same dose response in non-small cell lung cancer as we have seen in other tumors. A quick reminder on our data. All patients who received 900 milligrams are included in our data set, meaning this is a modified intent-to-treat analysis, so-called mITT, which is what the FDA looks at. Secondly, all responses are confirmed, again, the way FDA and other regulators judge responses. Now jumping to our waterfall plot for PDAC patients in the 900-milligram monotherapy cohort. First, none of the patients on the study saw their tumors grow. Second, 4 out of the 8 patients who had second-line pancreatic cancer and had confirmed responses and 5 out of the 14 patients who had third and fourth-line disease had confirmed responses. We also want to call out the unprecedented nature of all confirmed responses from a 22-patient data set of patients with heavily pretreated PDAC, including 2 single-agent complete responses. Here, we demonstrate the durability in the PDAC cohort with this swimmer plot. This highlights the need for multiple scans before observing response in some patients, but note that all responses are continuing except for one. That patient had progressive disease based on the CT scan, but is continuing many months now with stable disease and minimal side effects. In fact, he remains on the study today. Overall, we had 16 out of the 22 patients continuing with treatment at the time of the data cut. We are highly encouraged that with a median follow-up time of 6. 4 months, we have not yet hit the median progression-free survival, and this is well beyond the 4.3 months PFS that was observed in third or fourth line PDAC in daraxonrasib's Phase I trial. To clarify, RevMed has not disclosed their actual PFS or overall survival for their KRAS G12D PDAC data set from their Phase III study, so we don't have a clear picture of a benchmark for second line. But we do know that our ORR, namely 50% in second-line PDAC is higher than the 24% ORR that daraxonrasib had in the second-line setting in the KRAS G12D population. Let me reiterate, with a 67% landmark 6-month PFS rate, we feel confident that we are just beginning to uncover VS-7375's true potential and believe that trends in antitumor activity will continue to mature positively. Now while it's difficult to draw conclusions from direct comparisons between our data and that generated for other G12D selective or pan-RAS inhibitors, we've included key data points for ease of reference. In the second line, as noted above, we broke ground with a 50% confirmed ORR standing above daraxonrasib's 24% ORR in KRAS G12D-driven tumors recently disclosed in their FDA approval documents. In the third-line [ frst ], we observed 36% confirmed ORR with VS-7375, while daraxonerasib demonstrated 21% in the third and fourth line G12X population, which leads us to believe that in the G12D, specifically the ORR is very likely to be lower for daraxonrasib relative to VS-7375 given the worst outcomes for patients experience. Looking across other molecules and data points on the slide and including updates from ESMO, we believe that VS-7375 has best-in-class potential, and we look forward to building upon that in the Phase II trial. Transitioning now to CRC, colorectal cancer, while the data are still early, we cleared the 600-milligram dose and are encouraged by the antitumor activity at the 900-milligram dose level. We will provide an update on the CRC cohort with 10 patients worth of data in the coming months, dependent on CT scan schedules, but remain encouraged that 5 out of these 6 patients remain on treatment. Of the 6 patients in the mITT analysis, 33% demonstrated a response with median follow-up of 6.1 months. As you can see in this waterfall plot, every patient experienced tumor shrinkage, incredibly encouraging to see in heavily pretreated colorectal cancer. Next, we'll turn to lung at the 600-milligram dose level. With a 43% confirmed overall response rate, strong durability and a favorable tolerability profile compared to other available therapies, we believe these data support the potential for accelerated approval with VS-7375. While one patient's tumor is slightly growing, our waterfall is still compelling with one patient closing in on a potential complete response. Patients previously treated with taxanes are in the gold bars, and we see great responses in these patients as well as in the other subgroups. Now looking across the swimmers plot, you will see that responses tended to occur very quickly. As of this data cut, all partial responses were observed in the first scan, and we feel very good about how well VS-7375 is penetrating the lung tumors as shown here. Lung cancer generally is more susceptible to these therapies, and every one of the partial responses here is confirmed and continuing. Moving to frontline lung. These are the first 8 patients treated with VS-7375 at the 600-milligram dose, along with standard of care chemo immunotherapy. We have achieved a 75% overall response rate to date. Some of these responses are confirmed, some of these unconfirmed and some of these responses are just with KEYTRUDA because the patients who had a high PD-L1 or TPS score are indicated to receive KEYTRUDA monotherapy. The expected ORR in G12D lung cancer overall using upfront chemo immunotherapy is on the order of only 35% to 40%. To reiterate then, these KRAS G12D adenocarcinomas, therefore, fare much worse than the overall population with triplet treatment. And that's because G12D is a bad actor. So again, very early data, but very exciting and a consistent water-only fell profile. Finally, I will cover the key points from our safety and tolerability profile from the 900-milligram dose level across 48 patients in the Phase I trial. Patients were consistently able to stay on the 900-milligram dose as best highlighted through the dose modification statistics. Only a single patient or 2% discontinued treatment due to either a treatment-emergent or treatment-related adverse event. Coupled with the median relative dose intensity of 97%, we believe the VS-7375's profile is extremely favorable compared to any class of targeted therapy. The vast majority of adverse events are gastrointestinal in nature. And because the tolerability profile at 600 and 900 milligrams are practically identical, there is no reason for a dose reduction as it doesn't lead to a reduction in GI adverse events. Therefore, we consistently see dose interruption rates higher than reductions. A short interruption of 2 to 4 days can mitigate and effectively manage these AEs, supported by VS-7375's favorable half-life, long residence time and a 97% dose intensity. Patients who stopped the drug temporarily then restart at the full 900-milligram dose. Another important note is the lack of Grade 4 or 5 treatment-related adverse events. Only 10% of patients experienced a Grade 3 treatment-related event. While the predominant adverse events again of VS-7375 are gastrointestinal disorders, only 1 patient experienced a Grade 3 GI TRAE, namely transient nausea, which rapidly responded to therapy. Looking deep at GI events, the most frequent were nausea, diarrhea and vomiting. These were predominantly Grade 1 with around 10% to 20% of patients experiencing a Grade 2 GI AE. Beyond GI AEs, VS-7375 showed a very low rate of rash and no reported mucositis or stomatitis in this study, highlighting the potential tolerability advantage versus pan-RAS inhibition. As we look ahead to our future development plans and approaches, we believe that the safety data seen to date demonstrate VS-7375 is highly combinable and eventually can address a very wide population with KRAS G12D-driven cancers. Now let's talk about our broad ongoing program where we've made great progress. We have 3 ongoing Phase II trials, the TARGET-D 200 series in pancreatic, lung and colorectal cancer that are enrolling patients. We expect to complete enrollment in pancreatic and colorectal cancer around the end of the year and in the first half of 2027 for the lung trial. We then move to the frontline Phase III, which is the ultimate goal here. We are very cognizant and focused and that we want patients to have the best chance to get their tumor under long-term disease control by moving expeditiously to the front. Along those lines, we recently reached agreement with the FDA on the protocol of the frontline Phase III TARGET-D trial in PDAC, and we expect to initiate the trial before the end of 2026. In parallel, we look forward to reaching alignment with the FDA on the protocol for the frontline Phase III TARGET-D trials in CRC and non-small cell lung cancer and plan to initiate these trials in the first half of 2027. Before I hand it off to Dan Calkins, I want to spend a few minutes on the unique trial design of our Phase III first-line PDAC trial, TARGET-D 301. It's a 3-arm trial, 1:1:1 randomization. So 2/3 of the patients will be getting VS-7375 upfront. 1/3 will be getting standard chemotherapy. We went to the FDA with the argument that it is medically suboptimal for any patient in this day and age not to have at least a chance to get a RAS inhibitor if they have pancreatic cancer. As such, the FDA agreed to allow patients on the chemo arm to cross over once their tumor progress based on independently reviewed CT scans. Given that all patients, therefore, have the opportunity to receive VS-7375 initially or on crossover, it becomes a study essentially of 7375 in the front line versus getting the drug in the second line. That makes overall survival as an endpoint very difficult to interpret. It confuses the endpoint. And FDA agreed with this logic. So far, as far as we are aware, for the first time ever, the FDA has allowed a Phase III randomized controlled trial for approval in frontline pancreatic cancer to move overall survival to a secondary endpoint. FDA also have allowed us to include overall response rate as a dual primary endpoint. Some of you are aware of the program FDA has called the FrontRunner program, where you're allowed to potentially go to the FDA with data in hand and discuss the results of ORR analysis with them. We do not have explicit agreement that FDA will accept an accelerated approval based on ORR from this study, but FDA has allowed ORR to be one of the dual primary endpoints. In fact, FDA has also allowed other companies to include ORR in their primary endpoints in metastatic pancreatic cancer. So now we have the potential to use the FrontRunner program to garner accelerated approval in frontline disease. This is potentially very important as ORR will mature before the other dual primary endpoint, which is progression-free survival. We believe these elements are really good for patients who have a very serious disease, PDAC. And recognize and applaud the flexibility of the FDA in this rapidly changing landscape. And we are actively contracting this trial across multiple international sites and reception has been extremely positive. It's why we expect to open this Phase III TARGET-D 301 trial by the end of the year, as I mentioned. With that, I'll turn the call over to Dan Calkins.