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Plamotamab

Phase 2

Rheumatoid Arthritis | Monoclonal antibody | Immunology |Xencor, Inc.|Trials Updated: Aug 3, 2026

Plamotamab development status

Highest phase Phase 2 (NCT05328102)
Phase scored for XNCRPhase 1
Registered trials 2 across 1 sponsor since Apr 2022

Plamotamab target and mechanism

Molecular targetCD20
Target class-Mab (Antibody)
ModalityMonoclonal antibody

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLEDDMC
Total Trials1
Total Enrollment68

FDA Designations

No designations recorded

Plamotamab clinical trials

Plamotamab · 1 trial · 1 indication

Phase 1 1
NCT07230353A Phase 1b Open-label Study to Evaluate Safety of Plamotamab in Participants With Rheumatoid ArthritisRheumatoid Arthritis
RECRUITING68 Analytics
PHASE1RECRUITING
A Phase 1b Open-label Study to Evaluate Safety of Plamotamab in Participants With Rheumatoid Arthritis
Rheumatoid ArthritisUnlock trial analytics

Study Endpoints

Primary Endpoints

Primary
Through Week 52

Percentage of participants with treatment emergent adverse events (TEAEs) and serious adverse events (SAEs)

Secondary Endpoints

Secondary
Through Week 52
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Dose EscalationEXPERIMENTALPlamotamab administered SC

Interventions

NameTypeDescription
PlamotamabBIOLOGICALBiological
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites3

Inclusion Criteria: Adult participants with moderately to severely active RA. * Documented diagnosis of RA and meeting the 2010 American College of Rheumatology/European Alliance of Associations for Rheumatology classification criteria for RA at least 3 months prior to screening * Inadequate respon...

Countries:GeorgiaMoldovaNew Zealand
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Recent Changes (Last 90 Days)

LOWAug 3, 2026NCT07230353lastUpdatePostDate: changed
LOWAug 3, 2026NCT07230353lastUpdatePostDate: changed

Frequently asked questions about Plamotamab

What is Plamotamab used for in Rheumatoid Arthritis?

Plamotamab is an investigational monoclonal antibody being studied for the treatment of Rheumatoid Arthritis. It is currently in Phase 1 clinical development, with an ongoing open-label trial evaluating its safety in participants with this condition.

What does Plamotamab target?

Plamotamab targets CD20, a protein found on the surface of B cells. By binding to CD20, the antibody is designed to deplete B cells, which are implicated in the autoimmune response driving Rheumatoid Arthritis.

Who makes Plamotamab?

Plamotamab is being developed by Xencor, Inc., a biopharmaceutical company traded on the NASDAQ under the ticker symbol XNCR.

What phase is Plamotamab in?

Plamotamab is in Phase 1 clinical development. It is an investigational drug and has not been approved by regulatory authorities. A Phase 1b trial is currently recruiting participants to evaluate its safety in Rheumatoid Arthritis.

What clinical trials is Plamotamab in?

Plamotamab is being studied in a single Phase 1b open-label trial with the identifier NCT07230353. This trial is recruiting 68 participants with Rheumatoid Arthritis across sites in Georgia, Moldova, and New Zealand, and is not yet completed.