Zidesamtinib

Updated Phase 1 dose-escalation data from ARROS-1 and ALKOVE-1 clinical trials continue to support potential best-in-class profiles for zidesamtinib and NVL-655 Rapid enrollment in Phase 2 portions of the ARROS-1 and ALKOVE-1 clinical trials; Pivotal data from both ROS1 and ALK programs now anticipated in 2025 Initiation of ALKAZAR Phase 3 randomized, controlled trial of NVL-655 for treatment-naïve patients with advanced ALK-positive NSCLC anticipated in the first half of 2025 Company to host a conference call today at 8:30 a.m. ET/2:30 p.m. CEST CAMBRIDGE, Mass., Sept. 14, 2024 /PRNewswire/ -- Nuvalent, Inc. (Nasdaq: NUVL), a clinical-stage biopharmaceutical company focused on creating precisely targeted therapies for clinically proven kinase targets in cancer, today highlighted the presentation of updated data from the fully enrolled Phase 1 dose-escalation portions of the ongoing ARROS-1 Phase 1/2 clinical trial of zidesamtinib, a novel ROS1-selective inhibitor, and ALKOVE-1 Phase 1/2 clinical trial of NVL-655, a novel ALK-selective inhibitor, during two oral presentations at the European Society for Medical Oncology (ESMO) Congress 2024 in Barcelona, Spain. In addition, the company announced progress and provided updates on the development strategy and timelines for its parallel-lead programs zidesamtinib and NVL-655, including its development strategy for tyrosine kinase inhibitor (TKI)-naïve ALK-positive non-small cell lung cancer (NSCLC): Phase 2 portion of the ARROS-1 trial of zidesamtinib for TKI-naïve and TKI pre-treated patients with advanced ROS1-positive NSCLC and other solid tumors: Between September 2023 and September 1, 2024, 227 patients were enrolled in the ongoing single-arm, multi-cohort Phase 2 portion of the ARROS-1 trial, which is designed with registrational intent. The company expects to report pivotal data from this trial in 2025. Phase 2 portion of the ALKOVE-1 trial of NVL-655 for TKI-naïve and TKI pre-treated patients with advanced ALK-positive NSCLC and other solid tumors: Between February 2024 and September 1, 2024, 229 patients were enrolled in the ongoing single-arm, multi-cohort Phase 2 portion of the ALKOVE-1 trial, which is designed with registrational intent for TKI pre-treated patients. The company also expects to report pivotal data from this trial in 2025. ALKAZAR Phase 3 randomized, controlled trial of NVL-655 for TKI-naïve patients with advanced ALK-positive NSCLC: The Phase 3 ALKAZAR trial will be a global, randomized, controlled trial designed to evaluate NVL-655 versus the current standard of care for the treatment of patients with TKI-naïve ALK-positive NSCLC. Patients will be randomized 1:1 to receive NVL-655 monotherapy or ALECENSA® (alectinib) monotherapy, reflecting input from collaborating physician-scientists and alignment with the U.S. Food and Drug Administration (FDA). The company plans to initiate the ALKAZAR study in the first half of 2025. "The Phase 1 portions of our ARROS-1 and ALKOVE-1 studies have established preliminary clinical proof-of-concept for zidesamtinib and NVL-655 as selective, brain-penetrant, TRK-sparing TKIs that have the potential to move up the treatment paradigm, as demonstrated by the preliminary safety profile indicating favorable tolerability, and the durability of responses observed across patient subsets presented today at ESMO," said Christopher Turner, M.D., Chief Medical Officer at Nuvalent. "We believe zidesamtinib and NVL-655 have the potential to not only address clear medical needs in the third line where no approved therapies have demonstrated clinical benefit, but also provide differentiated options in the second line including for patients who have experienced disease progression due to CNS metastases or resistance mutations, and ultimately deliver deep, durable responses in the front line." "We are grateful for the strong investigator enthusiasm for our programs, exemplified by the accelerated Phase 2 enrollment in our ARROS-1 and ALKOVE-1 trials. We now anticipate reporting pivotal datasets from both Phase 2 trials in 2025," said Darlene Noci, A.L.M., Chief Development Officer at Nuvalent. "With the announcement of our planned ALKAZAR randomized, controlled Phase 3 study, we are thrilled to also establish a potential registration path for TKI-naïve patients with advanced ALK-positive NSCLC. Through our multi-pronged strategies, our goal is to bring potential best-in-class therapies that can move up the treatment paradigm to patients as efficiently as possible. We look forward to initiating the ALKAZAR study in the first half of 2025." The ALKAZAR trial is designed to enroll approximately 450 patients with TKI-naïve ALK-positive NSCLC. The primary endpoint is progression free survival (PFS) based on Blinded Independent Central Review (BICR). Secondary endpoints include PFS based on investigator's assessment, and BICR assessment of objective response rate (ORR), intracranial objective response rate (IC-ORR), overall survival (OS), and safety. "At the outset of this year, we announced our OnTarget 2026 operating plan delineating our path towards a potential first approval in 2026 from our pipeline of novel kinase inhibitors. With today's updates, we have successfully achieved all of the supporting milestones laid out for 2024 and believe we are now on track to share pivotal datasets from both of our parallel-lead programs in 2025, a testament to the tireless dedication of our team," said James Porter, Ph.D., Chief Executive Officer at Nuvalent. "I am incredibly proud of what we have accomplished thus far and am optimistic about the road ahead. With the foundation of encouraging Phase 1 proof-of-concept data, strong enrollment momentum in our global Phase 2 trials, alignment with the FDA on the design of our Phase 3 ALKAZAR study, and the dedication of our proven team, we are confident in our ability to continue advancing our programs towards our goal of delivering them as quickly as possible to the patients that need them." ARROS-1 Phase 1 Update at ESMO 2024 From January 2022 to August 2023, the Phase 1 portion of ARROS-1 enrolled 104 patients (99 NSCLC, 5 other solid tumors). Patients received zidesamtinib orally at dose levels ranging from 25 to 150 mg once daily (QD), and 100 mg QD was selected as the recommended Phase 2 dose (RP2D). No clinically significant exposure-response relationships for safety and efficacy were observed and data are reported across all doses. The patient population was heavily pre-treated, with a median of 3 prior lines of therapy (range 1 – 11). 69% (72/104) of patients had ≥2 prior ROS1 TKIs, and 66% (69/104) had prior chemotherapy. Notably, 55% (57/104) of patients received prior lorlatinib and 21% (22/104) received prior repotrectinib, highlighting the differentiated nature of this population from prior trials of other ROS1 inhibitors. 52% (54/104) had history of CNS metastases, including cases of disease progression following treatment with the brain-penetrant TKIs lorlatinib and/or repotrectinib. As of the cut-off date of July 1, 2024, 71 pre-treated patients with ROS1-positive NSCLC were response-evaluable. The median follow-up for the all-treated population was 12.1 months (range, 0.8 – 29.4). Treatment with zidesamtinib resulted in durable clinical responses (ORR by RECIST 1.1) across key subgroups of response-evaluable patients. As of the data cut-off date: In the subset of patients with confirmed ROS1 G2032R resistance mutation, the ORR was 72% (13/18) for repotrectinib-naïve patients. IC-ORR was 50% (4/8) in intracranial response-evaluable patients with measurable CNS lesions, of which 7/8 patients had been previously treated with the brain-penetrant TKIs lorlatinib and/or repotrectinib. The mIC-DOR was not reached, with no CNS progression observed among confirmed CNS responders. Zidesamtinib was well-tolerated with a preliminary safety profile that was favorable and consistent with its ROS1-selective, TRK sparing design. Among the 104 treated patients at all doses, the most frequent treatment-related adverse events (TRAEs) were oedema peripheral (19%), ALT increase, AST increase, and weight increase (each 11%). Among these most frequent TRAEs, there was a single grade 3 event of weight increase. No discontinuation due to TRAEs occurred. Dose reductions due to TRAEs occurred in 8% of patients. A maximum tolerated dose was not identified. The company believes these preliminary data demonstrate the potential for zidesamtinib to address a medical need for the third-line treatment of ROS1-positive NSCLC where no approved therapies have demonstrated clinical benefit, and to provide a differentiated option in the second line where there also remains a medical need. Additionally, the company believes that these data in heavily pre-treated patients could have the potential to translate to deep, durable responses in the front-line setting. Further investigation of zidesamtinib for both TKI-naïve and TKI pretreated patients with ROS1-positive NSCLC is underway in the Phase 2 portion of the ARROS-1 clinical trial, designed with registrational intent. The company expects to report pivotal data in 2025. ALKOVE-1 Phase 1 Update at ESMO 2024 From June 2022 to February 2024, the Phase 1 portion of ALKOVE-1 enrolled 133 patients (131 NSCLC, 2 other solid tumors). Patients received NVL-655 orally at dose levels ranging from 15 to 200 mg QD, and 150 mg QD was selected as the RP2D. The patient population was heavily pre-treated, with a median of 3 prior lines of therapy (range 1 – 9). 46% (61/133) of patients had ≥3 prior ALK TKIs, and 56% (74/133) had prior chemotherapy. Notably, 84% (111/133) of patients received prior lorlatinib and 51% (68/133) had any secondary ALK resistance mutation including 26% (34/133) with compound (≥2) ALK mutations, highlighting the differentiated nature of this population from prior trials of investigational ALK inhibitors. 56% (75/133) had history of CNS metastases, including cases of disease progression following treatment with the brain-penetrant TKI lorlatinib. As of the cut-off date of June 15, 2024, 103 heavily pre-treated patients with ALK-positive NSCLC treated across all doses were response-evaluable, of whom 39 were treated at the RP2D. The median follow-up for the all-treated population was 8.0 months (range 0.2, 22.5). Treatment with NVL-655 resulted in durable clinical responses (ORR by RECIST 1.1) across key subgroups of response-evaluable patients treated at the RP2D and across all dose levels. As of the data cut-off date: CNS responses were observed in patients with either measurable or unmeasurable CNS lesions across all doses, including complete intracranial responses in patients who previously received the brain-penetrant TKI lorlatinib. No CNS progression was observed among all confirmed CNS responders. NVL-655 was well-tolerated with a preliminary safety profile that was favorable and consistent with its ALK-selective, TRK sparing design. Among the 133 patients treated at all doses, the most frequent TRAEs were ALT increase (34%), AST increase (30%), constipation (16%), dysgeusia (13%), and nausea (12%). Among these most frequent TRAEs, 13% of patients experienced grade 3 ALT increase, one patient experienced grade 4 ALT increase, and 9% of patients experienced grade 3 AST increase. Transaminase elevations were generally transient and reversible. Discontinuations due to TRAEs occurred in 2% of patients and dose-reductions occurred in 15% of patients. A maximum tolerated dose was not identified. The company believes these preliminary data demonstrate the potential for NVL-655 to address a medical need for the third-line treatment of ALK-positive NSCLC where no approved therapies have demonstrated clinical benefit, and to provide a differentiated option in the second line. The ongoing Phase 2 portion of the ALKOVE-1 clinical trial is designed with registrational intent for TKI pre-treated patients with ALK-positive NSCLC, and the company expects to report pivotal data in 2025. Additionally, the company believes that these data in heavily pre-treated patients could have the potential to translate to deep, durable responses in the front-line setting. The company plans to initiate the Phase 3 randomized, controlled, ALKAZAR study with registrational intent for TKI-naïve patients in the first half of 2025. Conference Call Information Following oral presentations at the ESMO Congress 2024 in Barcelona, Spain, management will host a live webcast and conference call on Saturday, September 14, 2024 at 8:30 a.m. ET/2:30 p.m. CEST. To access the call, register online here for the live webcast or dial +1 (800) 836-8184 (domestic) or +1 (646) 357-8785 (international) at least 10 minutes prior to the start time and ask to be joined to the Nuvalent call. Accompanying slides and a live video webcast will be available in the Investors section of the Nuvalent website at . A replay and accompanying slides will be archived on the Nuvalent website for 30 days. About Zidesamtinib and the ARROS-1 Phase 1/2 Clinical Trial Zidesamtinib is a novel brain-penetrant ROS1-selective inhibitor created with the aim to overcome limitations observed with currently available ROS1 inhibitors. Zidesamtinib is designed to remain active in tumors that have developed resistance to currently available ROS1 inhibitors, including tumors with treatment-emergent ROS1 mutations such as G2032R. In addition, zidesamtinib is designed for central nervous system (CNS) penetrance to improve treatment options for patients with brain metastases, and to avoid inhibition of the structurally related tropomyosin receptor kinase (TRK) family. Together, these characteristics have the potential to avoid TRK-related CNS adverse events seen with dual TRK/ROS1 inhibitors and to drive deep, durable responses for patients across all lines of therapy. Zidesamtinib has received breakthrough therapy designation for the treatment of patients with ROS1-positive metastatic non-small cell lung cancer (NSCLC) who have been previously treated with 2 or more ROS1 tyrosine kinase inhibitors and orphan drug designation for ROS1-positive NSCLC. Zidesamtinib is currently being investigated in the ARROS-1 trial (NCT05118789), a first-in-human Phase 1/2 clinical trial for patients with advanced ROS1-positive NSCLC and other solid tumors. The completed Phase 1 portion enrolled ROS1-positive NSCLC patients who previously received at least one ROS1 TKI, or patients with other ROS1-positive solid tumors who had been previously treated. The Phase 1 portion of the trial was designed to evaluate the overall safety and tolerability of NVL-520, with additional objectives including determination of the recommended Phase 2 dose (RP2D), characterization of the pharmacokinetic profile, and evaluation of preliminary anti-tumor activity. The ongoing global, single arm, open label Phase 2 portion is designed with registrational intent for TKI naïve and TKI pre-treated patients with ROS1-positive NSCLC. About NVL-655 and the ALKOVE-1 Phase 1/2 Clinical Trial NVL-655 is a novel brain-penetrant ALK-selective inhibitor created with the aim to overcome limitations observed with currently available ALK inhibitors. NVL-655 is designed to remain active in tumors that have developed resistance to first-, second-, and third-generation ALK inhibitors, including tumors with single or compound treatment-emergent ALK mutations such as G1202R. In addition, NVL-655 is designed for central nervous system (CNS) penetrance to improve treatment options for patients with brain metastases, and to avoid inhibition of the structurally related tropomyosin receptor kinase (TRK) family. Together, these characteristics have the potential to avoid TRK-related CNS adverse events seen with dual TRK/ALK inhibitors and to drive deep, durable responses for patients across all lines of therapy. NVL-655 has received breakthrough therapy designation for the treatment of patients with locally advanced or metastatic ALK-positive non-small cell lung cancer (NSCLC) who have been previously treated with 2 or more ALK tyrosine kinase inhibitors and orphan drug designation for ALK-positive NSCLC. NVL-655 is currently being evaluated in the Phase 2 portion of the ALKOVE-1 Phase 1/2 clinical trial, a first-in-human study of NVL-655 in patients with advanced ALK-positive NSCLC and other solid tumors (NCT05384626). The completed Phase 1 portion enrolled ALK-positive NSCLC patients who previously received at least one ALK TKI and patients with other ALK-positive solid tumors who had been previously treated with at least one prior systemic anticancer therapy. The primary objectives were to determine the recommended Phase 2 dose (RP2D) and if applicable, the maximum tolerated dose (MTD) of NVL-655 in patients with ALK-positive solid tumors. Additional objectives included characterization of the overall safety, tolerability, and pharmacokinetic profile, and evaluation of the preliminary anti-tumor activity of NVL-655. The ongoing global, single arm, open label Phase 2 portion is designed with registrational intent for TKI pre-treated patients with ALK-positive NSCLC and to enable preliminary investigation for patients with ALK-positive NSCLC who are TKI naïve. About Nuvalent Nuvalent, Inc. (Nasdaq: NUVL) is a clinical-stage biopharmaceutical company focused on creating precisely targeted therapies for patients with cancer, designed to overcome the limitations of existing therapies for clinically proven kinase targets. Leveraging deep expertise in chemistry and structure-based drug design, we develop innovative small molecules that have the potential to overcome resistance, minimize adverse events, address brain metastases, and drive more durable responses. Nuvalent is advancing a robust pipeline with investigational candidates for ROS1-positive, ALK-positive, and HER2-altered non-small cell lung cancer, and multiple discovery-stage research programs. Forward-Looking Statements This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including, without limitation, implied and express statements regarding Nuvalent's strategy, business plans, and focus; the clinical development programs for zidesamtinib and NVL-655; the expected timing of reporting data readouts from Nuvalent's clinical trials of zidesamtinib and NVL-655; the design and timing of the ALKAZAR trial, including alignment with the FDA regarding the design of the trial; the potential clinical effects of zidesamtinib and NVL-655; the potential of Nuvalent's pipeline programs, including zidesamtinib and NVL-655; the implications of data readouts and presentations; Nuvalent's research and development programs for the treatment of cancer; and risks and uncertainties associated with drug development. The words "may," "might," "will," "could," "would," "should," "expect," "plan," "anticipate," "aim," "goal," "intend," "believe," "expect," "estimate," "seek," "predict," "future," "project," "potential," "continue," "target" or the negative of these terms and similar words or expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words. Drug development and commercialization involve a high degree of risk, and only a small number of research and development programs result in commercialization of a product. You should not place undue reliance on these statements or the scientific data presented. Any forward-looking statements in this press release are based on management's current expectations and beliefs and are subject to a number of risks, uncertainties, and important factors that may cause actual events or results to differ materially from those expressed or implied by any forward-looking statements contained in this press release, including, without limitation: risks that Nuvalent may not fully enroll the ARROS-1, ALKOVE-1 or ALKAZAR trials or that enrollment will take longer than expected; unexpected concerns that may arise from additional data, analysis, or results obtained during preclinical studies or clinical trials; the risk that results of earlier clinical trials may not be predictive of the results of later-stage clinical trials; the risk that data from our clinical trials may not be sufficient to support registration and that Nuvalent may be required to conduct one or more additional studies or trials prior to seeking registration of our product candidates; risks that Nuvalent may not achieve the goals and milestones set forth in its OnTarget 2026 operating plan; the occurrence of adverse safety events; risks that the FDA, European Medicines Agency or other foreign regulators may not approve our potential products on the timelines we expect, or at all; risks of unexpected costs, delays, or other unexpected hurdles; risks that Nuvalent may not be able to nominate drug candidates from its discovery programs; the direct or indirect impact of public health emergencies or global geopolitical circumstances on the timing and anticipated timing and results of Nuvalent's clinical trials, strategy, and future operations, including the ARROS-1, ALKOVE-1 and ALKAZAR trials; the timing and outcome of Nuvalent's planned interactions with regulatory authorities; and risks related to obtaining, maintaining, and protecting Nuvalent's intellectual property. These and other risks and uncertainties are described in greater detail in the section entitled "Risk Factors" in Nuvalent's Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2024, as well as any prior and subsequent filings with the Securities and Exchange Commission. In addition, any forward-looking statements represent Nuvalent's views only as of today and should not be relied upon as representing its views as of any subsequent date. Nuvalent explicitly disclaims any obligation to update any forward-looking statements. SOURCE Nuvalent, Inc. WANT YOUR COMPANY'S NEWS FEATURED ON PRNEWSWIRE.COM? 440k+ Newsrooms & Influencers 9k+ Digital Media Outlets 270k+ Journalists Opted In GET STARTED

Updated Phase 1 data from ALKOVE-1 and ARROS-1 clinical trials to be presented at the ESMO Congress 2024 Durable activity of NVL-655 and zidesamtinib in heavily pre-treated patient populations supports ongoing Phase 2 investigation in earlier lines of treatment Company plans to host a conference call on September 14, 2024 at 8:30 a.m. ET/2:30 p.m. CEST following oral presentations at ESMO CAMBRIDGE, Mass., Sept. 9, 2024 /PRNewswire/ -- Nuvalent, Inc. (Nasdaq: NUVL), a clinical-stage biopharmaceutical company focused on creating precisely targeted therapies for clinically proven kinase targets in cancer, today announced data from abstracts to be presented at the European Society for Medical Oncology (ESMO) Congress 2024 in Barcelona, Spain, including updates from the Phase 1 portions of the ongoing ALKOVE-1 Phase 1/2 clinical trial of ALK-selective inhibitor NVL-655 and ARROS-1 Phase 1/2 clinical trial of ROS1-selective inhibitor zidesamtinib, and new preclinical data further characterizing the intracranial activity of zidesamtinib accepted for a poster session. The Phase 1 data described in the abstracts will be updated in two oral presentations at ESMO and discussed during a live webcast and conference call with management on Saturday, September 14, 2024, at 8:30 a.m. ET/2:30 p.m. CEST, along with updates on the status of the global Phase 2 portions of both studies which are designed with registrational intent. "Our development strategy has been anchored around our guiding hypothesis: that we could drive deep and durable responses for patients by creating precisely targeted therapies that address the limitations of currently available options. We believe the data from the fully enrolled Phase 1 portions of our ALKOVE-1 and ARROS-1 clinical trials continue to support the potential for our parallel lead programs to achieve this goal through addressing the combined challenges of treatment-emergent resistance, brain metastases, and off-target central nervous system (CNS) adverse events," said Christopher Turner, M.D., Chief Medical Officer of Nuvalent. "We are particularly encouraged by the durability of responses seen with both NVL-655 and zidesamtinib in these heavily pre-treated patient populations, which we believe has the potential to be differentiated and to translate into meaningful improvements in earlier lines of treatment." "Complementary to our clinical updates at ESMO, we are pleased to also share new preclinical data that characterize the intracranial activity of our ROS1-selective inhibitor zidesamtinib in comparison to FDA-approved or investigational dual TRK/ROS1 inhibitors, which we believe supports the potential for zidesamtinib to deliver more durable intracranial responses while avoiding TRK inhibition," said Henry Pelish, Ph.D., Chief Scientific Officer at Nuvalent. "These data further add to the body of evidence that we believe supports the differentiated profile of zidesamtinib for patients with ROS1-positive NSCLC." "At the outset of these programs, we set out to design best-in-class molecules that could deliver clinically meaningful outcomes for patients with ALK- or ROS1-positive NSCLC and eventually become the front-line standard of care. Our Phase 1 updates at ESMO are a critical milestone towards achieving our goal, with longer follow-up demonstrating that NVL-655 and zidesamtinib can drive deep and durable responses even in heavily pre-treated patients that have exhausted all other treatment options," said James Porter, Ph.D., Chief Executive Officer at Nuvalent. "These data support the ongoing Phase 2 investigation of NVL-655 and zidesamtinib in both TKI pre-treated and TKI naïve patients, and we look forward to providing further program updates during our conference call later this week." Updated ALKOVE-1 Phase 1 Data Title: Phase 1/2 ALKOVE-1 study of NVL-655 in ALK-positive solid tumors Presentation Number: 1253O Session Category: Proffered paper session Session Title: NSCLC metastatic Updated Presentation Date and Time: Saturday September 14, 2024, 9:30 – 9:40 a.m. CEST Location: Barcelona Auditorium – Hall 2 Presenter: Alexander Drilon, M.D. (Memorial Sloan Kettering Cancer Center, New York, USA) Background: NVL-655 is a potent, brain-penetrant, ALK-selective tyrosine kinase inhibitor (TKI) designed to address key limitations of prior generation ALK TKIs (first generation (1G), second generation (2G) and third generation (3G)); it demonstrates preclinical activity against diverse ALK fusions and resistance mutations, including lorlatinib-refractory compound mutations, while avoiding tropomyosin receptor kinase (TRK) inhibition, which is associated with neurologic toxicities. Methods: The global ALKOVE-1 Phase 1 (NCT05384626) enrolled patients with pretreated advanced ALK-positive solid tumors. Key objectives were selection of a recommended Phase 2 dose (RP2D), safety, and efficacy (RECIST 1.1, investigator assessment). Results: As of the data cut-off date of March 23, 2024, 133 patients (131 NSCLC, 2 other) received NVL-655 (15-200 mg orally once daily (QD)) in Phase 1. Patients were heavily pre-treated with a median of 3 (range: 1-8) prior anticancer therapies and included: patients treated with a 2G ALK TKI (alectinib, brigatinib, ceritinib) or the 3G ALK TKI lorlatinib (100%); patients who had received ≥1 2G ALK TKI and the 3G ALK TKI lorlatinib (79%); patients who had received ≥3 prior ALK TKIs (46%); patients who had also received prior chemotherapy (56%); and, patients with a history of treated/untreated CNS metastases (56%). A maximum tolerated dose was not reached. 150 mg QD was selected as the RP2D, providing favorable safety, activity and exposure exceeding targeted efficacy thresholds for ALK resistance mutations. The most common treatment-related adverse events (TRAEs) were ALT increase (33%), AST increase (29%), constipation (15%), nausea (12%) and dysgeusia (11%); 2% discontinued due to TRAEs. CNS activity, including complete resolution of CNS metastases in lorlatinib-experienced patients, was observed. Conclusions: NVL-655 demonstrated encouraging efficacy and durability in heavily pretreated ALK-positive NSCLC patients, including patients who exhausted available therapies (including lorlatinib), with ALK single and compound resistance mutations, and with CNS metastases. Safety was favorable, consistent with the ALK-selective, TRK-sparing design. Phase 2 enrollment is ongoing with registrational intent for previously treated patients. Updated ARROS-1 Phase 1 Data Title: Phase 1/2 ARROS-1 study of zidesamtinib (NVL-520) in ROS1 fusion-positive solid tumors Presentation Number: 1256MO Session Category: Mini oral session Session Title: NSCLC metastatic Updated Presentation Date and Time: Saturday September 14, 2024, 10:25 – 10:30 a.m. CEST Location: Santander Auditorium – Hall 5 Presenter: Benjamin Besse, M.D., Ph.D. (Institut Gustav Roussy, Villejuif, France) Background: Zidesamtinib is a brain-penetrant, TRK-sparing, highly selective ROS1 TKI with activity against diverse ROS1 fusions and resistance mutations including G2032R. Methods: The global ARROS-1 Phase 1 (NCT05118789) enrolled patients with heavily pretreated advanced/metastatic ROS1-positive solid tumors. Key objectives were selection of the RP2D and evaluation of safety and efficacy (RECIST 1.1, investigator assessment). Results: As of the data cut-off date of March 12, 2024, 104 patients (99 NSCLC, 5 other) received zidesamtinib (25-150 mg orally QD) in Phase 1. Patients were heavily pre-treated with a median of 3 (range: 1-11) prior anticancer therapies including any ROS1 TKI (99%), and included: the most heavily pre-treated of patients, receiving two or more prior ROS1 TKIs (69%) and one or more prior lines of chemotherapy (66%); patients previously treated with lorlatinib (55%), repotrectinib (repo; 21%), or either (67%); and, patients with a history of treated/untreated CNS metastases (53%). 100 mg QD was selected as the RP2D with no observed dose relationships for safety or efficacy. No dose-limiting toxicity or discontinuation due to TRAE occurred. TRAE led to dose reduction in 5.8%. Most common TRAEs were peripheral edema (18%) and transaminase increase (12%); TRAEs were grade ≥3 in 7.7%. 73 patients with ROS1-positive NSCLC were response-evaluable: In patients with known ROS1 G2032R, ORR was 65% (11/17) with a median duration of response (mDOR) of 15.8m (6, NE) among repo-naïve patients and ORR was 38% (3/8) among repo-pretreated patients. In patients with measurable intracranial (IC) metastases and ≥2 prior ROS1 TKIs (all with prior lorlatinib and/or repo), IC-ORR was 57% (4/7), and IC-DOR range was 1.9+ - 17.3+m with no IC progression. Conclusions: Zidesamtinib demonstrated encouraging efficacy and durability in patients with pretreated ROS1-positive NSCLC, including those who had exhausted available therapies, with ROS1 resistance mutations including G2032R, and/or with CNS metastases. Safety was favorable and consistent with the highly ROS1-selective and TRK-sparing design. Phase 2 enrollment is ongoing with registrational intent in patients with TKI-naïve and pre-treated ROS1-positive NSCLC. Preclinical Intracranial Activity of Zidesamtinib Title: Profiling of Zidesamtinib and Other ROS1 Inhibitors in an Intracranial CD74-ROS1 G2032R Preclinical Model Presentation Number: 8P Abstract Number: 4811 Onsite Poster Display Date: Sunday September 15, 2024 Presenter: Anupong Tangpeerachaikul (Nuvalent, Inc., Cambridge, Massachusetts, United States) Introduction. TKIs crizotinib, entrectinib, and repotrectinib (US only) are approved for the treatment of ROS1-positive non-small cell lung cancer. Depth and durability of responses can be limited by the ROS1 G2032R resistance mutation and brain metastases, identified in ~40% and ~50% of patients, respectively, after disease progression on crizotinib. ROS1-selective TKI zidesamtinib and dual-TRK/ROS1 TKIs repotrectinib and taletrectinib have reported clinical activity against ROS1 G2032R and intracranial activity, with different adverse event profiles. In this study, we compared these three TKIs in a preclinical ROS1 G2032R brain tumor model. Methods. Ba/F3 CD74-ROS1 G2032R luciferase cells were implanted in the brain of Balb/c nude mice. Mice were orally treated with TKIs for 25 days QD or twice daily (BID). Brain tumors were monitored 1 – 2 times per week by bioluminescence imaging (BLI). At the endpoint, plasma and brain samples were collected for pharmacokinetics analyses. Results. Zidesamtinib (3 mg/kg BID) suppressed CD74-ROS1 G2032R brain tumors to <5% of initial BLI signal through day 25. Brain tumors were suppressed by repotrectinib (15 or 75 mg/kg BID) and taletrectinib (100 mg/kg QD) up to day 8 but regrew and eventually exceeded the initial BLI signal by 300 – 3,000%. Switching from repotrectinib (15 mg/kg BID) to zidesamtinib (3 mg/kg BID) on day 8 kept brain tumors to <15% of initial BLI signal. In this study, all TKIs achieved plasma exposures near or above their reported clinical plasma exposures. Zidesamtinib brain exposure exceeded its in vitro ROS1 G2032R IC50 but not TRKB IC50; by contrast, repotrectinib brain exposure exceeded its TRKB IC50 but not ROS1 G2032R IC50. Conclusion. In this preclinical model, zidesamtinib demonstrated more durable intracranial activity than repotrectinib and taletrectinib at clinically relevant plasma concentrations. Switching treatment from repotrectinib to zidesamtinib resulted in improved preclinical intracranial activity. Preclinical activity against ROS1 G2032R, including in the brain, together with a TRK-sparing design supports zidesamtinib as a potential best-in-class ROS1-selective therapy. Conference Call Information Following oral presentations at the ESMO Congress 2024 in Barcelona, Spain, management will host a live webcast and conference call on Saturday, September 14, 2024 at 8:30 a.m. ET/2:30 p.m. CEST. To access the call, register online here for the live webcast or dial +1 (800) 836-8184 (domestic) or +1 (646) 357-8785 (international) at least 10 minutes prior to the start time and ask to be joined to the Nuvalent call. Accompanying slides and a live video webcast will be available in the Investors section of the Nuvalent website at . A replay and accompanying slides will be archived on the Nuvalent website for 30 days. About NVL-655 and the ALKOVE-1 Phase 1/2 Clinical Trial NVL-655 is a novel brain-penetrant ALK-selective inhibitor created with the aim to overcome limitations observed with currently available ALK inhibitors. NVL-655 is designed to remain active in tumors that have developed resistance to first-, second-, and third-generation ALK inhibitors, including tumors with single or compound treatment-emergent ALK mutations such as G1202R. In addition, NVL-655 is designed for central nervous system (CNS) penetrance to improve treatment options for patients with brain metastases, and to avoid inhibition of the structurally related tropomyosin receptor kinase (TRK) family. Together, these characteristics have the potential to avoid TRK-related CNS adverse events seen with dual TRK/ALK inhibitors and to drive deep, durable responses for patients across all lines of therapy. NVL-655 has received breakthrough therapy designation for the treatment of patients with locally advanced or metastatic ALK-positive non-small cell lung cancer (NSCLC) who have been previously treated with 2 or more ALK tyrosine kinase inhibitors and orphan drug designation for ALK-positive NSCLC. NVL-655 is currently being evaluated in the Phase 2 portion of the ALKOVE-1 Phase 1/2 clinical trial, a first-in-human study of NVL-655 in patients with advanced ALK-positive NSCLC and other solid tumors (NCT05384626). The completed Phase 1 portion enrolled ALK-positive NSCLC patients who previously received at least one ALK TKI and patients with other ALK-positive solid tumors who had been previously treated with at least one prior systemic anticancer therapy. The primary objectives were to determine the recommended Phase 2 dose (RP2D) and if applicable, the maximum tolerated dose (MTD) of NVL-655 in patients with ALK-positive solid tumors. Additional objectives included characterization of the overall safety, tolerability, and pharmacokinetic profile, and evaluation of the preliminary antitumor activity of NVL-655. The ongoing global, single arm, open label Phase 2 portion is designed with registrational intent for TKI pre-treated patients with ALK-positive NSCLC and to enable preliminary investigation for patients with ALK-positive NSCLC who are TKI naïve. About Zidesamtinib and the ARROS-1 Phase 1/2 Clinical Trial Zidesamtinib is a novel brain-penetrant ROS1-selective inhibitor created with the aim to overcome limitations observed with currently available ROS1 inhibitors. Zidesamtinib is designed to remain active in tumors that have developed resistance to currently available ROS1 inhibitors, including tumors with treatment-emergent ROS1 mutations such as G2032R. In addition, zidesamtinib is designed for central nervous system (CNS) penetrance to improve treatment options for patients with brain metastases, and to avoid inhibition of the structurally related tropomyosin receptor kinase (TRK) family. Together, these characteristics have the potential to avoid TRK-related CNS adverse events seen with dual TRK/ROS1 inhibitors and to drive deep, durable responses for patients across all lines of therapy. Zidesamtinib has received breakthrough therapy designation for the treatment of patients with ROS1-positive metastatic non-small cell lung cancer (NSCLC) who have been previously treated with 2 or more ROS1 tyrosine kinase inhibitors and orphan drug designation for ROS1-positive NSCLC. Zidesamtinib is currently being investigated in the ARROS-1 trial (NCT05118789), a first-in-human Phase 1/2 clinical trial for patients with advanced ROS1-positive NSCLC and other solid tumors. The completed Phase 1 portion enrolled ROS1-positive NSCLC patients who previously received at least one ROS1 TKI, or patients with other ROS1-positive solid tumors who had been previously treated. The Phase 1 portion of the trial was designed to evaluate the overall safety and tolerability of NVL-520, with additional objectives including determination of the recommended Phase 2 dose (RP2D), characterization of the pharmacokinetic profile, and evaluation of preliminary anti-tumor activity. The ongoing global, single arm, open label Phase 2 portion is designed with registrational intent for TKI naïve and TKI pre-treated patients with ROS1-positive NSCLC. About Nuvalent Nuvalent, Inc. (Nasdaq: NUVL) is a clinical-stage biopharmaceutical company focused on creating precisely targeted therapies for patients with cancer, designed to overcome the limitations of existing therapies for clinically proven kinase targets. Leveraging deep expertise in chemistry and structure-based drug design, we develop innovative small molecules that have the potential to overcome resistance, minimize adverse events, address brain metastases, and drive more durable responses. Nuvalent is advancing a robust pipeline with investigational candidates for ROS1-positive, ALK-positive, and HER2-altered non-small cell lung cancer, and multiple discovery-stage research programs. Forward-Looking Statements This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including, without limitation, implied and express statements regarding Nuvalent's strategy, business plans, and focus; the clinical development programs for zidesamtinib and NVL-655; the potential clinical effects of zidesamtinib and NVL-655; the potential of Nuvalent's pipeline programs, including zidesamtinib and NVL-655; the implications of data readouts and presentations; Nuvalent's research and development programs for the treatment of cancer; and risks and uncertainties associated with drug development. The words "may," "might," "will," "could," "would," "should," "expect," "plan," "anticipate," "aim," "goal," "intend," "believe," "expect," "estimate," "seek," "predict," "future," "project," "potential," "continue," "target" or the negative of these terms and similar words or expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words. Drug development and commercialization involve a high degree of risk, and only a small number of research and development programs result in commercialization of a product. You should not place undue reliance on these statements or the scientific data presented. Any forward-looking statements in this press release are based on management's current expectations and beliefs and are subject to a number of risks, uncertainties, and important factors that may cause actual events or results to differ materially from those expressed or implied by any forward-looking statements contained in this press release, including, without limitation: risks that Nuvalent may not fully enroll the ARROS-1 or ALKOVE-1 trials or that enrollment will take longer than expected; unexpected concerns that may arise from additional data, analysis, or results obtained during preclinical studies or clinical trials; the risk that results of earlier clinical trials may not be predictive of the results of later-stage clinical trials; the risk that data from our clinical trials may not be sufficient to support registration and that Nuvalent may be required to conduct one or more additional studies or trials prior to seeking registration of our product candidates; risks that Nuvalent may not achieve the goals and milestones set forth in its OnTarget 2026 operating plan; the occurrence of adverse safety events; risks that the U.S. Food and Drug Administration, European Medicines Agency or other foreign regulators may not approve our potential products on the timelines we expect, or at all; risks of unexpected costs, delays, or other unexpected hurdles; risks that Nuvalent may not be able to nominate drug candidates from its discovery programs; the direct or indirect impact of public health emergencies or global geopolitical circumstances on the timing and anticipated timing and results of Nuvalent's clinical trials, strategy, and future operations, including the ARROS-1 and ALKOVE-1 trials; the timing and outcome of Nuvalent's planned interactions with regulatory authorities; and risks related to obtaining, maintaining, and protecting Nuvalent's intellectual property. These and other risks and uncertainties are described in greater detail in the section entitled "Risk Factors" in Nuvalent's Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2024, as well as any prior and subsequent filings with the Securities and Exchange Commission. In addition, any forward-looking statements represent Nuvalent's views only as of today and should not be relied upon as representing its views as of any subsequent date. Nuvalent explicitly disclaims any obligation to update any forward-looking statements. SOURCE Nuvalent, Inc.