Elranatamab/Lenalidomide Consolidation and/or Elranatamab Maintenance Versus Standard of Care After D-VRd Induction in Transplant-eligible NDMM Patients

This study is designed as a multicenter, randomized, parallel groups, open-label, phase 3 study in subjects with untreated newly diagnoses Multiple Myeloma eligible for ASCT. 824 patients will be enrolled in this study from approximately 70 study sites. The 2 parts in the Treatment Phase are described below. Part 1: Induction/ASCT/Consolidation Phase (1:1 Randomization) After the screening period, patients will be randomly allocated (1:1) to either: * Arm A (standard of care arm): standard induction therapy with 4 cycles of D-VRd, followed by HDCT (Melphalan) + ASCT, D-VRd consolidation therapy * Arm B (experimental arm): standard induction therapy with 4 cycles of D-VRd, followed by elranatamab and lenalidomide consolidation therapy. Part 2: Maintenance Phase (1:1 Re-randomization) Patients will be re-randomized (1:1) and will enter the Maintenance Phase upon completion of consolidation therapy. • Arm C (standard of care arm): daratumumab + lenalidomide approx 2 years. Subjects with a negative MRD (for at least 12 months) after 24 cycles of daratumumab-lenalidomide will discontinue daratumumab and continue with lenalidomide monotherapy until disease progression, or study cut-off date (whichever occurs first). Subjects who did not achieve MRD negativity for at least 12 months after 24 cycles of daratumumab-lenalidomide will continue to receive daratumumab-lenalidomide until: * MRD negativity for at least 12 months is reached. Subjects will then continue with lenalidomide monotherapy until disease progression, or study cut-off date (whichever occurs first). * Disease progression * Or study cut-off date (whichever occurs first). * Arm D (experimental arm): elranatamab. Approx 2 years. Subjects with a negative MRD (for at least 12 months) after receiving M22 administration of elranatamab will discontinue study treatment with elranatamab. Subjects who did not achieve MRD negativity for at least 12 months after M22 elranatamab administration will continue to receive elranatamab, every 24 weeks, until MRD negativity for at least 12 months is reached, disease progression, or study cut-off date (whichever occurs first).

Inclusion Criteria: 1. Male or female subjects, aged over 18 but \< 70 years old 2. Patients have provided voluntary written informed consent before performing any study-related procedure. 3. Patients with newly diagnosed multiple myeloma (NDMM) eligible for high-dose chemotherapy (melphalan) and autologous stem cell transplantation (ASCT). 4. Patients with documented symptomatic NDMM according to CRAB and/or SLIM criteria, with measurable disease as defined by: * Presence of ≥10% monoclonal plasma cells in the bone marrow OR presence of a biopsy-proven plasmacytoma. In addition, the patient must have ≥1 of the following myeloma defining events: \- Hypercalcemia: serum calcium \>0.25 mmol/L (\>1 mg/dL) higher than upper limits of normal (ULN) or \>2.75 mmol/L (\>11 mg/dL). \- Renal insufficiency: creatinine clearance \< 40mL/min/1.73 m2 using CKD-EPI or serum creatinine \>177 μmol/L (\>2 mg/dL). \- Anemia: hemoglobin \>2 g/dL below the lower limit of normal (LLN) or hemoglobin \470 msec (12-lead ECG). 11. Subjects taking systemic treatment with strong inhibitors of CYP1A2 (fluvoxamine, enoxacin), strong inhibitors of CYP3A (clarithromycin, telithromycin, itraconazole, voriconazole, ketoconazole, nefazodone, posaconazole) or strong CYP3A inducers (rifampin, rifapentine, rifabutin, carbamazepine, phenytoin, phenobarbital), or use of Ginkgo biloba or St. John's wort (millepertuis) within the 14 days before initiating induction therapy. 12. Known intolerance to steroids, mannitol, pregelatinized starch, sodium stearyl fumarate, histidine (as base and hydrochloride salt), arginine hydrochloride, poloxamer 188, sucrose or any of the other components of study intervention that are not amenable to premedication with steroids and H2 blockers or would prohibit further treatment with these agents. 13. Known allergies to any of the study medications, their analogues, or excipients in the various formulations. 14. Subjects who have had major surgery within 2 weeks before study inclusion (signing of the informed consent) OR will not have fully recovered from surgery before initiating induction therapy OR have surgery planned during their study participation. Kyphoplasty and vertebroplasty are not considered as major surgery. 15. Subjects with any prior or concurrent malignancy (other than multiple myeloma) within 5 years of study inclusion study, except for adequately treated basal cell or squamous cell carcinoma of the skin, in situ carcinoma of the cervix, or localized prostate adenocarcinoma diagnosed ≥3 years ago and without evidence of biological failure, or other cancers for which the subject has undergone potentially curative therapy and has without evidence of relapse/recurrence for ≥5 years. 16. Pregnant or breast-feeding women. Women that refuse to abstain from heterosexual intercourse or refuse to use adequate contraceptives during heterosexual intercourse starting at least 4 weeks before initiating induction therapy and continually until at least 4 weeks after discontinuing lenalidomide,90 days after discontinuing daratumumab and 6 months after discontinuing elranatamab. 18\. Men with partners of childbearing potential, even men with a successful vasectomy, that refuse to use a condom during intercourse, from initiating induction therapy to ≥4 weeks ys after discontinuing lenalidomide,. Furthermore, men must agree to not donate sperm during this period. 19\. Known positive for HIV or active hepatitis A, B or C: Uncontrolled or active HBV infection: Patients with positive HBsAg and/or HBV DNA Of note: Patients can be eligible if anti-HBc IgG positive (with or without positive anti-HBs) but HBsAg and HBV DNA are negative. o If anti-HBV therapy in relation to prior infection was started before initiation of IMP, the anti-HBV therapy and monitoring should continue throughout the study treatment period. Patients with negative HBsAg and positive HBV DNA observed during screening period will be evaluated by a specialist for start of anti-viral treatment: study treatment could be proposed if HBV DNA becomes negative, and all the other study criteria are still met. • Active HCV infection: positive HCV RNA and negative anti-HCV. Of note: Patients with antiviral therapy for HCV started before initiation of IMP and positive HCV antibodies are eligible. The antiviral therapy for HCV should continue throughout the treatment period until seroconversion. Patients with positive anti-HCV and undetectable HCV RNA without antiviral therapy for HCV are eligible. 20\. Patient with an active systemic infection or severe infections requiring parenteral administration of antibiotics. 21\. Patients with a gastrointestinal disease/disorder that may significantly impact the absorption of oral treatments. 22\. Patients unable or unwilling to undergo antithrombic prophylaxis. 23\. A person under guardianship, trusteeship, or deprived of freedom by a judicial or administrative decision.