Recent Updates
Recently added Catalysts

XmAb541

Phase 1

Ovarian Cancer | Monoclonal antibody | Oncology |Xencor, Inc.|Trials Updated: Oct 9, 2026

XmAb541 development status

Highest phase Phase 1
Registered trials 2 across 1 sponsor since Feb 2024

XmAb541 target and mechanism

Molecular targetCLDN6
Target classProtein
ModalityMonoclonal antibody

Success Probability

Subscribe to view

Market & Valuation

Subscribe to view

Trial Design

UNCONTROLLEDDMC
Total Trials2
Total Enrollment372

FDA Designations

No designations recorded

XmAb541 clinical trials

XmAb541 · 2 trials · 5 indications

Phase 1 2
NCT07593092Phase 1, Safety and Tolerability Study of XmAb541 and XmAb808 in Advanced Solid TumorsOvarian Cancer
RECRUITING90 Analytics
NCT06276491Phase 1, Safety and Tolerability Study of XmAb541 in Advanced Solid TumorsOvarian Cancer
RECRUITING282 Analytics
PHASE1RECRUITING
Phase 1, Safety and Tolerability Study of XmAb541 and XmAb808 in Advanced Solid Tumors
Ovarian CancerUnlock trial analytics
PHASE1RECRUITING
Phase 1, Safety and Tolerability Study of XmAb541 in Advanced Solid Tumors
Ovarian CancerUnlock trial analytics

Study Endpoints

Primary Endpoints

Incidence of Adverse Events
Day 1 to 2 years
Incidence of dose-limiting toxicities
Day 1 to Day 43
Incidence of dose-limiting toxicities (DLTs)
Day 1 to Day 28
Incidence of cytokine release syndrome (CRS)
Day 1 to Day 28

Secondary Endpoints

Measurement of Cmax
Day 1 - 2 years
Measurement of area under curve (AUC)
Day 1 to 2 years
Measurement of Ctrough
Day 1 to 2 years
Unlock Study Endpoints

Study Design & Arms

AllocationNA
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Dose Escalation and Dose Expansion of XmAb541 and XmAb808EXPERIMENTAL -
Dose escalation and Dose Expansion of XmAb541EXPERIMENTALIntravenous or Subcutaneous administration

Interventions

NameTypeDescription
XmAb541BIOLOGICALMonoclonal Bispecific Antibody
XmAb808BIOLOGICALMonoclonal Bispecific Antibody
Unlock Study Design Details

Eligibility Criteria

Age Range18 Years to N/A
SexFEMALE
Healthy VolunteersNo
Study Sites4

Inclusion Criteria: * Age ≥ 18 years. * CLDN6+ tumor * Histological or cytological documentation of locally advanced, recurrent, or metastatic high grade serous ovarian carcinoma (HGSOC) including fallopian tube or primary peritoneal origin * Adequate Eastern Cooperative Oncology Group performance ...

Countries:United StatesBelgiumDenmarkFranceSpainUnited Kingdom
Unlock Eligibility Criteria

Competitive Landscape -Ovarian Cancer 244 trials

Top 20 of 60 competitors

CompanyTickerTrialsLead PhaseDrugs
GSK plc Sponsored ADRGSK7PHASE3Niraparib, Dostarlimab, Mocertatug rezetecan
AstraZeneca PLCAZN21PHASE3Olaparib, Durvalumab, AZD5335, Torvutatug samrotecan, Datopotamab deruxtecan
Merck & Co., Inc.MRK16PHASE3Pembrolizumab, Sacituzumab tirumotecan, Raludotatug Deruxtecan, Patritumab Deruxtecan, MK-6255
Eli Lilly and CompanyLLY8PHASE3Sofetabart Mipitecan, Gemcitabine, Abemaciclib, LY4101174, LY3537982
AbbVie, Inc.ABBV14PHASE3Mirvetuximab soravtansine, Brimonidine eye, IMGN151, ABBV-400, ABBV-901
Bristol-Myers Squibb CompanyBMY4PHASE3Nivolumab, BMS-986340, Pumitamig, BMS-986463, BMS-986500
Genmab A/S Sponsored ADRGMAB7PHASE3Rina-S, GEN1047 is a bispecific antibody that induces T-cell mediated cytotoxicity of B7H4-positive tumor cells
Pfizer Inc.PFE4PHASE3Avelumab, Lorlatinib, Talazoparib, Axitinib, Utomilumab
Corcept Therapeutics Incorporated.CORT2PHASE3Relacorilant
Verastem, Inc.VSTM5PHASE3Avutometinib, Defactinib
Incyte CorporationINCY3PHASE3INCB123667
Zentalis Pharmaceuticals, Inc.ZNTL3PHASE3Azenosertib
Imunon, Inc.IMNN3PHASE3IMNN-001
Regeneron Pharmaceuticals, Inc.REGN5PHASE2Ubamatamab, Cemiplimab, Fianlimab, REGN10597, REGN5668
Novartis AG Sponsored ADRNVS5PHASE2Spartalizumab, Dabrafenib, trametinib, KFA115, Tulmimetostat
Genelux Corp.GNLX1PHASE3Olvimulogene nanivacirepvec
BeOne Medicines Ltd. Sponsored ADRONC3PHASE3Pamiparib, BG-C9074, BG-68501, BGB-43395
Xencor, Inc.XNCR3PHASE2vudalimab, XmAb541, XmAb808
Exelixis, Inc.EXEL2PHASE2Cabozantinib
Jazz Pharmaceuticals Public Limited CompanyJAZZ1PHASE2Zanidatamab
Unlock Competitive Intelligence

Recent Changes (Last 90 Days)

LOWOct 9, 2026NCT06276491lastUpdatePostDate: changed
LOWOct 9, 2026NCT06276491lastUpdatePostDate: changed
LOWAug 25, 2026NCT06276491lastUpdatePostDate: changed
LOWAug 25, 2026NCT06276491lastUpdatePostDate: changed
LOWAug 14, 2026NCT07593092Status: NOT_YET_RECRUITING → RECRUITING
LOWAug 14, 2026NCT07593092Status: NOT_YET_RECRUITING → RECRUITING
LOWAug 14, 2026NCT07593092Status: NOT_YET_RECRUITING → RECRUITING

Frequently asked questions about XmAb541

What is XmAb541 used for?

XmAb541 is an investigational monoclonal antibody being studied for the treatment of ovarian cancer and other advanced solid tumors. It is also being evaluated in endometrial cancer, germ cell tumors, testicular germ cell tumors, and ovarian germ cell tumors. It has not been approved for any use and remains in clinical development.

What does XmAb541 target?

XmAb541 targets CLDN6, a protein in the claudin family. CLDN6 is a tight junction protein that is expressed in certain solid tumors, including ovarian cancer. By binding CLDN6, XmAb541 is designed to direct an immune response against tumor cells that express this target.

Who is developing XmAb541?

XmAb541 is being developed by Xencor, Inc., a biopharmaceutical company that trades on the Nasdaq under the ticker symbol XNCR. Xencor designs engineered monoclonal antibodies and other protein therapeutics, and XmAb541 is part of its oncology pipeline.

What phase is XmAb541 in?

XmAb541 is in Phase 1 clinical development. It is an investigational agent and has not been approved by the FDA or any other regulatory authority. The Phase 1 program is evaluating safety and tolerability in patients with advanced solid tumors, including ovarian cancer.

What clinical trials is XmAb541 in?

XmAb541 is being studied in two recruiting Phase 1 trials. NCT06276491 evaluates XmAb541 in advanced solid tumors including ovarian, endometrial, and germ cell tumors across the United States and several European countries. NCT07593092 evaluates XmAb541 together with XmAb808 in advanced solid tumors, including ovarian cancer, in the United States.

How many patients are enrolled in XmAb541 trials?

The two Phase 1 trials of XmAb541 have a combined planned enrollment of 372 participants. NCT06276491 plans to enroll 282 patients, and NCT07593092 plans to enroll 90 patients. Both studies are currently recruiting and neither is randomized or controlled.