EX-99.2 3 tm2330918d1_ex99-2.htm EXHIBIT 99.2

 

Exhibit 99.2

 

Mirdametinib for NF1 - PN November 16 , 2023 ReNeu Topline Results

 

2 Note: Unless otherwise indicated, the information presented herein is as of November 16, 2023. This presentation may contain “forward - looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, relating to our business, operations, and financial conditions, including but not limited to current beliefs, expectations and assumptions regarding the future of our business, fut ure plans and strategies, our development plans, our preclinical and clinical results, the potential for nirogacestat to become an important new treatment for adult patients with desmoid tumors, the potential for a Marketing Authorisation Application for nirogacestat , expectations regarding the timing and results of the U.S. Food and Drug Administration (FDA)’s review of the NDA for nirogacestat , including the FDA's PDUFA target action date for the NDA, and the adequacy of the data contained in the NDA to serve as the basis for an approval of nirogacestat for the treatment of adults with desmoid tumors, the potential for the results of the Phase 2b ReNeu clinical trial to support an NDA submission for mirdametinib , the potential for mirdametinib to become an important new treatment for patients with NF1 - PN, our plans for seeking regulatory approval for and making mirdametinib available for NF1 - PN patients, if approved, expectations regarding the timing and initial data from the Phase 2 trial evaluating nirogacestat in patients with recurrent ovarian granulosa cell tumors, our plans to file an Investigational New Drug Application for SW - 682 in 2023, our plans to report additional clinical data of nirogacestat in combination with BCMA - directed therapies and initiate additional planned Phase 1 collaborator studies, our expectations regarding the potential for the Phase 1b dose expansion phase of brimarafenib , expectations about whether our patents for our lead assets will adequately protect SpringWorks against competition, as well as relating to other future conditions. Words such as, but not limited to, “look forward to,” “believe,” “e xpect,” “anticipate,” “estimate,” “intend,” “plan,” “would,” “should” and “could,” and similar expressions or words, identify forward - looking statements. New risks and uncertainties may emerge from time to time, and it is not possible to predict all risks and uncertainties. Any forward - looking statements in this presentation are based on management’s current expectations and beliefs and are subject to a number of ris ks, 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 presentation, including, w ithout limitation, risks relating to: ( i ) the success and timing of our product development activities, including the initiation and completion of SpringWorks ’ clinical trials, (ii) our expectations regarding the potential clinical benefit of mirdametinib for patients with NF1 - PN, (iii ) the fact that topline or interim data from clinical studies may not be predictive of the final or more detailed results of such study or th e r esults of other ongoing or future studies, ( iv ) the success and timing of our collaboration partners’ ongoing and planned clinical trials, ( iv ) the timing of our planned regulatory submissions and interactions, including the timing and outcome of decisions made by th e F DA , the European Medicines Agency (EMA) and other regulatory authorities, investigational review boards at clinical trial sites and publication review bodies, ( vi ) whether FDA , EMA or other regulatory authorities will require additional information or further studies, or may fail or refuse to approve or may delay approval of our drug candidates, inc lud ing nirogacestat and mirdametinib , ( vii ) our ability to obtain and maintain regulatory approval of any of our product candidates, ( viii ) our plans to research, discover and develop additional product candidates, ( ix ) our ability to enter into collaborations for the development of new product candidates and our ability to realize the benefits expected from such collaborations, ( x ) our ability to maintain adequate patent protection and successfully enforce patent claims against third parties, ( xi ) the adequacy of our cash position to fund our operations through any time period indicated herein, ( xii ) our ability to establish manufacturing capabilities, and our and our collaboration partners’ abilities to manufacture our product candidates and scale production, and ( xiii ) our ability to meet any specific milestones set forth herein. Except as required by applicable law, we do not plan to publicly update or revise any forward - looking statements contained herei n, whether as a result of any new information, future events, changed circumstances or otherwise. Although we believe the expectations reflected in such forward - looking statements are reasonable, we can give no assurance that such expectations will prove to be correct. Accordingly, readers are cautioned not to place undue reliance on these forward - looking statements. For further information regarding the risks, uncertainties and other factors that may cause differences between SpringWorks ’ expectations and actual results, you should review the “Risk Factors” section(s) of our filings with the Securities and Exchange Commission. Certain information contained in this presentation relates to or is based on studies, publications, surveys and other data ob tai ned from third - party sources and our own internal estimates and research. While SpringWorks believes these third - party sources to be reliable as of the date of this presentation, we have not independently verified, and make no representation as to the adequacy, fairness, accuracy or completeness of, any information obtained from third - party sources. In addition, all of the market data included in this present ation involves a number of assumptions and limitations, and there can be no guarantee as to the accuracy or reliability of such assumptions. Finally, while we believe our own internal research is relia ble , such research has not been verified by any independent source. Forward - Looking Statements

 

3 Today’s Agenda Sections Presenter Introduction Saqib Islam Chief Executive Officer ReNeu Phase 2b Data Jim Cassidy, MD, PhD Chief Medical Officer Program Highlights and Next Steps Badreddin Edris, PhD Chief Operating Officer Q&A All

 

Introduction Saqib Islam Chief Executive Officer

 

5 Positive Topline Results From ReNeu Demonstrate Mirdametinib’s Potentially Transformative Benefit for NF1 - PN Patients Note: NF1 - PN: Neurofibromatosis type 1 - associated plexiform neurofibroma. ▪ Topline data suggest class - leading potential for both children and adults with NF1 - PN ▪ Robust objective response rates confirmed by Blinded Independent Central Review ▪ Differentiated depths of response with extended treatment durations ▪ Manageable tolerability profile with product features to enhance compliance ▪ Anti - tumor activity supported by improvements in pain and quality of life measures Kylie, NF1 - PN patient Gus, NF1 - PN patient Katie, NF1 - PN patient

 

6 A Substantial Unmet Need Remains for a Best - in - Class Therapy for NF1 - PN Patients Sources: (1) SpringWorks Market Research; (2) Korf, American Journal of Medical Genetics, 1999; (3) Koselugo prescribing information. Savanna, NF1 - PN patient Surgery is difficult due to infiltrative growth along nerves, and an inadequate long - term solution (1,2) Disfiguring and highly morbid growth along nerves, often causing chronic, disabling pain Challenging dosing / administration, tolerability, and label restrictions limit utility of currently approved MEK inhibitors (3) Significant impact on patient and caregiver quality of life with emotional and psychological burden

 

ReNeu Phase 2b Data Jim Cassidy, MD, PhD Chief Medical Officer

 

8 Phase 2b ReNeu Trial Summary Note: REiNS : Response Evaluation in Neurofibromatosis and Schwannomatosis ; BICR: blinded independent central review; BID: twice daily; QoL: quality of life. ▪ Phase 2b open - label; n = 114 patients in 2 cohorts (pediatric and adults) across 50 U.S. sites ▪ 2 mg/m 2 BID dosing with intermittent course (4 - week cycles of 3 weeks on, 1 week off) for up to 24 cycles; maximum dose of 4 mg BID ▪ Pediatric formulation (dispersible tablet) introduced in 2H 2020 TRIAL DESIGN Treatment Phase Mirdametinib 2 mg/m 2 BID 3 weeks on / 1 week off Up to 24 cycles Long Term Follow - up Phase (LTFU) Cohort 1 2 – 17 yrs Cohort 2 ≥18 yrs PN causing significant morbidity Eligible Patients ▪ Confirmed objective response rate ( ≥ 20% reduction in tumor volume per REiNS criteria ) determined by BICR by end of treatment phase PRIMARY ENDPOINT ▪ Safety and tolerability, duration of response, QoL and physical functioning assessments (including measures of pain) SECONDARY AND EXPLORATORY ENDPOINTS

 

9 Baseline Patient Demographics and Disease Characteristics Note: PN: plexiform neurofibroma. Characteristic n (%) Patients enrolled 56 Median age at enrollment [range] - years 10.0 [2 – 17] Sex Male Female 26 (46) 30 (54) Location of target neurofibroma Head and Neck Lower / Upper Extremities Paraspinal Other 28 (50) 8 (14) 4 (7) 16 (29) Type of neurofibroma - related complication Pain Disfigurement or Major Deformity Motor Dysfunction or Weakness Airway Dysfunction Other 39 (70) 28 (50) 15 (27) 7 (13) 12 (21) Target PN progressing at study entry 35 (63) Pediatric Participants (n=56) Adult Participants (n=58) Characteristic n (%) Patients enrolled 58 Median age at enrollment [range] - years 34.5 [18 – 69] Sex Male Female 21 (36) 37 (64) Location of target neurofibroma Head and Neck Lower / Upper Extremities Paraspinal Other 28 (48) 17 (29) 5 (9) 8 (14) Type of neurofibroma - related complication Pain Disfigurement or Major Deformity Motor Dysfunction or Weakness Airway Dysfunction Other 52 (90) 30 (52) 23 (40) 3 (5) 10 (17) Target PN progressing at study entry 31 (53)

 

10Best Tumor ResponsePediatric CohortNote: BICR: blinded independent central review;cORR : confirmed objective response(1)Shows best change in tumor volume achieved at any point, including unconfirmed partial responses.(2)Participants that discontinued study prior to any ontreatment MRI assessment.#Patient remains on studyBest Overall ConfirmedResponse Status (BICR)n (%)Partial response29 (52)Stable disease22 (39)Progressive disease3 (5)Missing( 2 (4)*1 patient achieved a confirmedresponse in long term follow up and isnot included in the calculation of ORRMedian best change in tumor volume of42 (n=Confirmed ResponseRate (BICR)n (%)cORR*29 (52)

 

11 Treatment Duration and Response Pediatric Cohort ▪ Median duration of treatment was 22.0 months ▪ Median time to first response was 7.9 months ‒ 45% of patients had their onset of confirmed response by Cycle 5 assessment ( 4.2 months) ▪ Median duration of response was not reached ▪ 28 patients remained on treatment as of data cutoff ▪ 85% of patients that completed the treatment phase chose to continue receiving treatment in the long - term follow - up portion of the study Evaluable Patients End of treatment phase (24 cycles (1) ) (1) 4 - week cycles of 3 weeks on, 1 week off. Treatment phase ends 3 weeks into final cycle. × Progressive disease Objective response confirmed Onset of objective response → Patient remains on treatment

 

12 Patient - Reported Outcomes Pediatric Cohort Scale p - Value for Change from Baseline (1) Target Tumor Pain - Numeric Rating Scale (NRS - 11) (2) (n=15) 0.003 Pain Interference Index (PII) (3) Self - Report (n=20) Parent Proxy (n=18) 0.004 0.016 Pediatric Quality of Life Inventory (PedsQL) (4) – Total Score Self - Report (n=38) Parent Proxy (n=43) 0.096 0.005 Pediatric Quality of Life Inventory (PedsQL) (4) – Physical Functioning Self - Report (n=38) Parent Proxy (n=43) 0.033 0.037 (1) Change from baseline at Cycle 13, the pre - specified assessment for patient - reported outcome analysis per the ReNeu statistical analysis plan. Least squared means estimates using a mixed model for repeated measures (MMRM). (2) The NRS - 11 assesses target tumor pain on a scale from 0 – “no pain” to 10 – “worst pain you can imagine.” NRS - 11 assessments wer e performed for six consecutive days prior to a visit as well as on the visit day, except for the ET visit, which is done on the visit day only. The mean of these seven assessments is taken as the visit score. Basel ine is defined as the most recent NRS - 11 score taken on or before treatment start date. (3) The PII assesses the degree to which pain has impacted the participants’ daily activities on a scale from 0 – “not at all” to 6 – “completely.” PII assessments were performed on the six consecutive days prior to a visit as well as on the visit day, except for the ET visit, which is done on the visit day only. The mean of these seven assessments i s t aken as the visit score. Baseline is defined as the most recent PII score taken on or before treatment start date. (4) PedsQL assess quality of life on a Likert scale from 0 to 4. These items are then reverse scored and linearly transformed to a 0 - 100 s cale as follows: 0=100, 1=75, 2=50, 3=25, 4=0, with higher scores indicating a higher quality of life. Baseline is defined as the most recent PedsQL score taken on or before treatment start date.

 

13 Safety Summary Pediatric Cohort (1) Composite adverse event including dermatitis acneiform, rash, rash maculo - papular, rash erythematous, acne, seborrheic dermatiti s, exfoliative rash, papule, rash papular , dermatitis, rash macular, rash pruritic. (2) Dose interruptions due to treatment - related adverse events occurred in 8 patients (14%). Note: TEAE: treatment - emergent adverse event; TRAE: treatment - related adverse event. (n=56) TEAEs ≥ 20% Subjects TRAEs Preferred Term All Grades – n (%) ≥ Grade 3 – n (%) All Grades – n (%) ≥ Grade 3 – n (%) Any TEAE 56 (100) 22 (39) 53 (95) 14 (25) Rash (1) 36 (64) 2 (4) 33 (59) 2 (4) Diarrhea 31 (55) 3 (5) 21 (38) 1 (2) Dermatitis acneiform 24 (43) 1 (2) 24 (43) 1 (2) Vomiting 22 (39) 0 (0) 8 (14) 0 (0) Headache 19 (34) 1 (2) 6 (11) 0 (0) Paronychia 18 (32) 0 (0) 17 (30) 0 (0) Nausea 15 (27) 0 (0) 12 (21) 0 (0) Abdominal pain 15 (27) 2 (4) 8 (14) 2 (4) Ejection fraction decreased 15 (27) 1 (2) 11 (20) 1 (2) COVID - 19 14 (25) 0 (0) 0 (0) 0 (0) Upper respiratory tract infection 13 (23) 0 (0) 1 (2) 0 (0) Blood creatine phosphokinase increased 12 (21) 4 (7) 11 (20) 4 (7) Cough 12 (21) 0 (0) 0 (0) 0 (0) (n=56) n (%) TEAE leading to dose interruption (2) TEAE leading to dose reduction TEAE leading to discontinuation 17 (30) 7 (13) 5 (9)

 

14Best Tumor ResponseAdult CohortNote: BICR: blinded independent central review;cORR : confirmed objective response(1)Shows best change in tumor volume achieved at any point, including unconfirmed partial responses.(2)Participants that discontinued study prior to any ontreatment MRI assessment.#Patient remains on study*2 patients achieved a confirmedresponse in long term follow up and arenot included in the calculation of ORRBest Overall ConfirmedResponse Status (BICR)n (%)Partial response24 (41)Stable disease26 (45)Progressive disease0 (0)Missing( 8 (14)Confirmed ResponseRate (BICR)n (%)cORR*24 (41)Median best change in tumor volume of41 (n=

 

15 Treatment Duration and Response Adult Cohort Evaluable Patients End of treatment phase (24 cycles (1) ) × Progressive disease Death (2) Objective response confirmed (1) 4 - week cycles of 3 weeks on, 1 week off. Treatment phase ends 3 weeks into final cycle. (2) One patient death due to COVID - 19 occurred within 30 days of discontinuing study treatment and was deemed not related to mirdametinib . Onset of objective response → Patient remains on treatment ▪ Median duration of treatment was 21.8 months ▪ Median time to first response was 7.8 months ‒ 46 % of patients had their onset of confirmed response by Cycle 5 assessment ( 4.2 months) ▪ Median duration of response was not reached ▪ 22 patients remained on treatment as of data cutoff ▪ 84% of patients that completed the treatment phase chose to continue receiving treatment in the long - term follow - up portion of the study

 

16 Patient - Reported Outcomes Adult Cohort Scale p - Value for Change from Baseline (1) Target Tumor Pain Numeric Rating Scale (NRS - 11) (2) (n=21) <0.001 Pain Interference Index (PII) (3) (n=22) <0.001 Pediatric Quality of Life Inventory (PedsQL) (4) – Total Score (n=34) 0.009 Pediatric Quality of Life Inventory (PedsQL) (4) – Physical Functioning (n=34) 0.009 . (1) Change from baseline at Cycle 13, the pre - specified assessment for patient - reported outcome analysis per the ReNeu statistical analysis plan. Least squared means estimates using a mixed model for repeated measures (MMRM). (2) The NRS - 11 assesses target tumor pain on a scale from 0 – “no pain” to 10 – “worst pain you can imagine.” NRS - 11 assessments wer e performed for six consecutive days prior to a visit as well as on the visit day, except for the ET visit, which is done on the visit day only. The mean of these seven assessments is taken as the visit score. Basel ine is defined as the most recent NRS - 11 score taken on or before treatment start date. (3) The PII assesses the degree to which pain has impacted the participants’ daily activities on a scale from 0 – “not at all” to 6 – “completely.” PII assessments were performed on the six consecutive days prior to a visit as well as on the visit day, except for the ET visit, which is done on the visit day only. The mean of these seven assessments i s t aken as the visit score. Baseline is defined as the most recent PII score taken on or before treatment start date. (4) PedsQL assess quality of life on a Likert scale from 0 to 4. These items are then reverse scored and linearly transformed to a 0 - 100 s cale as follows: 0=100, 1=75, 2=50, 3=25, 4=0, with higher scores indicating a higher quality of life. Baseline is defined as the most recent PedsQL score taken on or before treatment start date.

 

17 Safety Summary Adult Cohort (n=58) TEAEs ≥ 20% Subjects TRAEs Preferred Term All Grades – n (%) ≥ Grade 3 – n (%) All Grades – n (%) ≥ Grade 3 – n (%) Any TEAE 58 (100) 21 (36) 57 (98) 9 (16) Rash (1) 54 (93) 6 (10) 54 (93) 6 (10) Dermatitis acneiform 45 (78) 5 (9) 45 (78) 5 (9) Diarrhea 34 (59) 0 (0) 28 (48) 0 (0) Nausea 30 (52) 0 (0) 21 (36) 0 (0) Vomiting 22 (38) 0 (0) 16 (28) 0 (0) Fatigue 17 (29) 1 (2) 12 (21) 1 (2) COVID - 19 13 (22) 3 (5) 0 (0) 0 (0) SARS - COV - 2 test positive 12 (21) 2 (3) 0 (0) 0 (0) (1) Composite adverse event including dermatitis acneiform, rash, rash maculo - papular, rash erythematous, acne, seborrheic dermatiti s, exfoliative rash, papule, rash papular , dermatitis, rash macular, rash pruritic. (2) Dose interruptions due to treatment - related adverse events occurred in 5 patients (9%). Note: TEAE: treatment - emergent adverse event; TRAE: treatment - related adverse event. (n=58) n (%) TEAE leading to dose interruption (2) TEAE leading to dose reduction TEAE leading to discontinuation 18 (31) 10 (17) 13 (22)

 

Program Highlights and Next Steps Badreddin Edris, PhD Chief Operating Officer

 

19 Sources: (1) Lammert et al., Arch Dermat , 2005. U.S. Census Data; (2) Fisher et al., Neuro - Oncology, 2022. (3) SpringWorks market research. ~100,000 Individuals with an NF1 diagnosis in the U.S. (1) ~40,000 Patients living with NF1 - PN in the U.S. (2,3) Mirdametinib Is Positioned to Address the Substantial Unmet Needs That Remain for Meaningful Population of NF1 - PN Patients With Its Differentiated Profile Potential therapeutic option for broader age spectrum, encompassing both p ediatric and adult patients x Robust antitumor activity: BICR ORR of 52 % for pediatric patients and 41% for adult patients with evidence of deep and durable responses x Manageable safety profile with low rates of Grade 3+ toxicities in both cohorts supports opportunity for long - term dosing potential in real world x Differentiated product formulation for ease of administration x Convenient therapy designed to enhance compliance with no fasting requirement, optimized dosing, and limited drug - drug interactions x Statistical significance demonstrated across several important patient - reported outcome measures related to quality of life and pain x

 

20 Regulatory Status and Next Steps Regulatory Designations: ▪ Orphan Drug Designation for NF1 granted by FDA and European Commission and Fast Track Designation for NF1 - PN granted by FDA ▪ Rare Pediatric Disease Designation granted by FDA in July 2023 Upcoming Submissions: ▪ Plan to request Pre - NDA meeting with FDA to be held in 1Q24 and NDA submission expected in 1H24 Upcoming Data: ▪ Expect to present detailed study results from pediatric and adult cohorts of ReNeu trial at medical conference in 1H24 ▪ Plan to submit manuscript for peer - reviewed journal publication in 2024

 

21Positive Results From ReNeuAdvance Our Goal of Two Potential Approvals by 2025(1)Gounder et al., NEJM, 2023.Note: PDUFA: Prescription Drug User Fee Act; NF1-PN: Neurofibromatosis type 1-associated plexiform neurofibroma.21Mirdametinib?If approved, would be the first FDA-approved therapy for desmoid tumors (PDUFAdate: November 27, 2023)?Phase 3 DeFi trial achieved statistically significant and clinically meaningful results on primary and all key secondary endpoints(1)?Opportunity to transform the standard of care for desmoid tumor patients?Topline ReNeudata demonstrated potential for robust antitumor activity and clinical benefit, safety and tolerability, and convenience?Differentiated option for pediatric patients and potential to be first approved in adults?Opportunity to deliver a best-in-class therapy for adult and pediatric NF1-PNpatients by 2025, if approvedNirogacestat

 

Thank You

 

23 Jim Cassidy, MD, PhD Chief Medical Officer Q&A Saqib Islam Chief Executive Officer Badreddin Edris, PhD Chief Operating Officer