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S095029

Phase 1

MSI-H/dMMR Gastroesophageal-junction Cancer | Small molecule | Oncology |Tango Therapeutics, Inc.|Last Updated: Apr 3, 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
UNCONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment48
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT06116136A Study to Evaluate the Safety and the Activity of S095029 as Part of Combination Therapy in Advanced Gastroesophageal Junction/Gastric Cancers.PHASE1 ACTIVE NOT_RECRUITING 48Aug 31, 2024Aug 1, 2027Apr 3, 202649 United States, Australia +13
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Study Endpoints
Primary Endpoints
Number of Dose-Limiting Toxicities (DLTs)
At the end of Cycle 1 (each cycle is 21 days)

Phase 1b and Phase 2

Total Number of Adverse Events (AEs)
From screening to 90 days after the last dose

Phase 1b and Phase 2

Adverse Events (AEs) Leading to Dose Interruption, Modification, or Delays
From screening to 90 days after the last dose

Phase 1b and Phase 2

Adverse Events (AEs) Leading to Dose Discontinuation
From screening to 90 days after the last dose

Phase 1b and Phase 2

Objective Response Rate (ORR)
Approximately 2 years

Phase 2 ONLY. The Proportion of participants who achieve complete response (CR) or partial response (PR), as per Response Evaluation Criteria in Solid Tumors (RECIST) v1.1.

Secondary Endpoints
Duration of Response (DoR)
Approximately 2 years
Progression-Free Survival (PFS)
Approximately 2 years
Disease Control Rate (DCR)
Approximately 2 years
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Study Design & Arms
AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
S095029 and pembrolizumabEXPERIMENTALParticipants diagnosed with gastric cancer (GC) or gastroesophageal junction cancer (GEJ), not previously treated with checkpoint inhibitors (CPIs) may first be enrolled into a Phase 1b safety lead-in part which will be used to identify the recommended Phase 2 dose (RP2D) of S095029 in combination with pembrolizumab. During the Phase 2 part, participants will receive the recommended Phase 2 dose (RP2D) of S095029, along with pembrolizumab.
Interventions
NameTypeDescription
S095029DRUGParticipants will be treated with S095029 via intravenous (IV) infusion every 3 weeks (Q3W).
pembrolizumab 200 mg (KEYTRUDA ®)DRUGParticipants will be treated with 200 mg of pembrolizumab via intravenous (IV) infusion every 3 weeks (Q3W).
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Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites49

Inclusion Criteria: * Have a confirmed diagnosis of locally advanced and unresectable or metastatic gastric or gastro-esophageal junction adenocarcinoma * Participants' tumor must have an MSI-H/dMMR status according to institutional guidelines and/or according to the College of American Pathologist...

Countries:United StatesAustraliaAustriaBelgiumBrazilCanadaChinaDenmarkFranceHungaryItalyJapanPuerto RicoSpainUnited Kingdom
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Recent Changes (Last 90 Days)
LOWMay 24, 2026NCT06116136studyFirstPostDate: changed