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MK-4700

Phase 1

Malignant Neoplasm | Monoclonal antibody | Oncology |Merck & Company, Inc.|Last Updated: Mar 16, 2026

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
CONTROLLEDBiomarker
Total Trials1
Total Enrollment5
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT06894771A Study of MK-4700 Alone or With Pembrolizumab in Participants With Advanced or Metastatic Solid Tumors (MK-4700-001)PHASE1 COMPLETED 5Apr 23, 2025Dec 8, 2025Mar 16, 20267 United States, Canada +1
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Study Endpoints
Primary Endpoints
Dose-Limiting Toxicity (DLT)
Cycle 1 (up to 21 days)

The occurrence of any of the following toxicities during Cycle 1 will be considered a DLT, if assessed by the investigator related to study intervention administration: * Grade 4 nonhematologic toxicity * Grade 4 hematologic toxicity lasting ≥7 days, except thrombocytopenia * Any nonhematologic AE ≥Grade 3 in severity, with exceptions * Any Grade 3 or Grade 4 nonhematologic laboratory value, as with pre-specified exceptions * Any Grade 3 or Grade 4 laboratory abnormalities, with the exceptions * Febrile neutropenia Grade 3 or Grade 4 * Prolonged delay (\>2 weeks) in initiating Cycle 2 due to intervention-related toxicity * Any study drug toxicity that causes the participant to discontinue study drug during Cycle 1 * Missing \>25% of MK-4700 doses as a result of drug-related AEs during the first cycle * Grade 5 toxicity

Percentage of Participants Who Experience an Adverse Event (AE)
Up to approximately 4.5 years

An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention.

Percentage of Participants who Discontinue Study Treatment Due to an AE
Up to approximately 4.5 years

An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention.

Secondary Endpoints
Area Under the Concentration-Time Curve of MK-4700
Predose and at prespecified time points during Cycles 1, 2, 3, 4, 5, 6, 7, and 10 up to approximately 7 months (Cycle length is 21 days)
Maximum Plasma Concentration (Cmax) of MK-4700
Predose and at prespecified time points during Cycles 1, 2, 3, 4, 5, 6, 7, and 10 up to approximately 7 months (Cycle length is 21 days)
Minimum Plasma Concentration (Cmin) of MK-4700
Predose and at prespecified time points during Cycles 1, 2, 3, 4, 5, 6, 7, and 10 up to approximately 7 months (Cycle length is 21 days)
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Study Design & Arms
AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Arm 1: MK-4700EXPERIMENTALParticipants receive escalating doses every three weeks (Q3W) of MK-4700 for a maximum of 35 cycles (approximately 2 years; cycles are 21 days in length). Eligible participants enrolled in Arm 1 who experience progressive disease (PD) may cross over to Arm 2 to receive MK-4700 and pembrolizumab combination therapy.
Arm 2: MK-4700 + PembrolizumabEXPERIMENTALParticipants will receive MK-4700 and pembrolizumab Q3W for up to 35 cycles (approximately 2 years) or until PD, death, toxicity, or withdrawal of consent.
Interventions
NameTypeDescription
MK-4700BIOLOGICALAdministered via subcutaneous (SC) injection
PembrolizumabBIOLOGICALAdministered via intravenous infusion
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Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites7

Inclusion Criteria: The key inclusion criteria include but are not limited to the following: * Has histologically or cytologically confirmed advanced/metastatic solid tumor by pathology report who have experienced disease progression on or after prior anti-cancer treatments, or been intolerant to,...

Countries:United StatesCanadaIsrael
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Recent Changes (Last 90 Days)
MEDIUMMay 21, 2026NCT06894771TRIAL_REMOVED: changed
MEDIUMMay 21, 2026NCT06894771TRIAL_REMOVED: changed