A Study to Evaluate the Safety, Pharmacokinetics, and Activity of XmAb24306 in Combination With Cevostamab in Participants With Relapsed/Refractory Multiple Myeloma

August 10, 2026 updated by: Genentech, Inc.

A Phase Ib, Open-label, Multicenter Dose-escalation Study to Evaluate the Safety, Pharmacokinetics, and Activity of XmAb24306 in Combination With Cevostamab in Patients With Relapsed/Refractory Multiple Myeloma

The purpose of this study is to evaluate the safety, tolerability, pharmacokinetics, and activity of XmAb24306 in combination with cevostamab in participants with relapsed/refractory multiple myeloma (R/R MM) who have received a minimum of three prior treatments, including at least one immunomodulatory drug (IMiD), one proteasome inhibitor (PI), and one anti-CD38 monoclonal antibody.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Active, not recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
90

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • Australia
    • South Australia
      • Adelaide, South Australia, Australia, 5000
        • Royal Adelaide Hospital
    • Victoria
      • Melbourne, Victoria, Australia, 3000
        • Peter MacCallum Cancer Centre
      • Melbourne, Victoria, Australia, 3004
        • Alfred Hospital
  • Denmark
      • Vejle, Denmark, 7100
        • Sygehus Lillebaelt - Vejle Sygehus
  • Greece
      • Athens, Greece, 106 76
        • Evangelismos General Hospital of Athens
      • Athens, Greece, 115 28
        • University of Athens, Hematological Clinic,
  • Israel
      • Petah Tikva, Israel, 4941492
        • Rabin Medical Center-Beilinson Campus
      • Tel Aviv, Israel, 64239
        • Tel Aviv Sourasky Medical Center PPDS
  • Norway
      • Oslo, Norway, N - 0424
        • Oslo University Hospital Rikshospitalet
  • South Korea
      • Seoul, South Korea, 05505
        • Asan Medical Center - PPDS
      • Seoul, South Korea, 03722
        • Severance Hospital, Yonsei University
  • Spain
      • Valencia, Spain, 46026
        • Hospital Universitari i Politecnic La Fe de Valencia
    • Navarre
      • Pamplona, Navarre, Spain, 31008
        • Clinica Universidad de Navarra

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Eastern Cooperative Oncology Group (ECOG) Performance Status of 0 or 1
  • Life expectancy of at least 12 weeks
  • Participants must have received a minimum of 3 prior lines of therapy, including at least one PI, one IMiD, and an anti-CD38 monoclonal antibody.
  • Documented evidence of progressive disease on or after the last prior therapy, or participants who were intolerant to the last prior therapy.
  • Measurable disease, as defined by the protocol
  • Participants agree to follow contraception or abstinence requirements as defined in the protocol

Exclusion Criteria:

  • Any anti-cancer therapy within 3 weeks prior to initiation of study treatment with exception defined by the protocol
  • Participants with autologous stem cell transplantation (SCT) within 100 days prior to first dose of study treatment
  • Participants with prior allogeneic SCT or solid organ transplantation
  • Known history of hemophagocytic lymphohistiocytosis (HLH) or macrophage activation syndrome (MAS)
  • Active or history of autoimmune disease
  • Participants with current or history of Central Nervous System (CNS) disease, or current CNS involvement by Multiple Myeloma (MM)
  • Significant cardiovascular disease
  • Participants with known clinically significant liver disease
  • Symptomatic active pulmonary disease requiring supplemental oxygen
  • Known active infection requiring intravenous anti-microbial therapy within 14 days prior to first study drug administration
  • Any episode of active, symptomatic COVID-19 infection, or requiring treatment with IV antivirals for COVID-19 (not including COVID-19 primary prophylaxis) within 14 days, prior to first study treatment
  • Other protocol defined inclusion/exclusion criteria may apply

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Non-Randomized
  • Interventional Model: Sequential Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Arm A: Dose-Escalation and Expansion: XmAb24306+Cevostamab
Participants will receive escalating doses of XmAb24306 with a fixed dose regimen for cevostamab up to the maximum tolerated dose (MTD). After dose escalation has been completed, up to two expansion cohorts each investigating different XmAb24306 doses in combination with cevostamab may be enrolled.
Drug: Tocilizumab
Tocilizumab will be administered for the treatment of cytokine release syndrome (CRS) when necessary.
Other Names:
  • Actemra, RoActemra
Drug: Cevostamab
Cevostamab will be administered intravenously on a 28-day cycle, for up to one year of treatment depending on clinical response.
Other Names:
  • RO7187797
Drug: XmAb24306
XmAb24306 will be administered intravenously on a 28-day cycle, for up to one year of treatment depending on clinical response.
Other Names:
  • RO7310729
Experimental: Arm B: Single-Agent Cevostamab Expansion
Participants will receive cevostamab alone.
Drug: Tocilizumab
Tocilizumab will be administered for the treatment of cytokine release syndrome (CRS) when necessary.
Other Names:
  • Actemra, RoActemra
Drug: Cevostamab
Cevostamab will be administered intravenously on a 28-day cycle, for up to one year of treatment depending on clinical response.
Other Names:
  • RO7187797

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Percentage of Participants with Adverse Events (AEs)
Time Frame: Up to approximately 3 years
Adverse events will be reported according to the National Cancer Institute Common Terminology Criteria for Adverse Events, Version 5.0 (NCI CTCAE v5.0), and Cytokine Release Syndrome (CRS), will be graded based on the American Society for Transplantation and Cellular Therapy (ASTCT) criteria.
Up to approximately 3 years

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Serum Concentration of XmAb24306
Time Frame: Up to approximately 3 years
Up to approximately 3 years
Serum Concentration of Cevostamab
Time Frame: Up to approximately 3 years
Up to approximately 3 years
Objective Response Rate (ORR)
Time Frame: Up to approximately 3 years
ORR will be determined by the investigator according to International Myeloma Working Group (IMWG) criteria.
Up to approximately 3 years
Rate of Complete Response (CR)/ Stringent Complete Response (sCR)
Time Frame: Up to approximately 3 years
Rate of CR/sCR will be determined by the investigator.
Up to approximately 3 years
Rate of Very Good Partial Response (VGPR)
Time Frame: Up to approximately 3 years
Rate of VGPR will be determined by the investigator.
Up to approximately 3 years
Percentage of Participants With Anti-Drug Antibodies (ADA) to XmAb24306 and Cevostamab
Time Frame: Up to approximately 3 years
Up to approximately 3 years

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Genentech, Inc.

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Director: Clinical Trials, Hoffmann-La Roche

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
March 21, 2023

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
November 18, 2026

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
November 18, 2026

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
December 2, 2022

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
December 2, 2022

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
December 12, 2022

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
August 11, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
August 10, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
August 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • GO43980
  • 2022-001204-18 (EudraCT Number)
  • 2023-505212-38-00 (Other Identifier: EU CT Number)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

For eligible studies, qualified researchers may request access to individual patient level clinical data. See Roche's commitment to transparency of clinical study information here: https://go.roche.com/data_sharing

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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