Recent Updates
Recently added Catalysts

OP-3136

Phase 1

Advanced or Metastatic ER+ HER2- Breast Cancer (mBC) | Small molecule | Oncology |Olema Pharmaceuticals, Inc.|Last Updated: Oct 10, 2025

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
Premium
Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
Premium
Trial Design
RandomizedCONTROLLEDBiomarker
Total Trials1
Total Enrollment180
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT06784193Phase 1 Study of OP-3136 in Advanced or Metastatic Solid TumorsPHASE1 RECRUITING 180Dec 16, 2024Aug 30, 2027Oct 10, 20258 United States, Australia
Unlock Drug Trial Details
Study Endpoints
Primary Endpoints
Number of participants with dose-limiting toxicities in the Dose Escalation Arms
Up to 28 days
Incidence of adverse events and laboratory abnormalities
Up to 26 months
Secondary Endpoints
Maximum observed concentration (Cmax)
Up to 26 months
Time to maximum concentration (Tmax)
Up to 26 months
Area under the curve from time zero to 24 hours (AUC0-24)
Up to 26 months
Unlock Study Endpoints
Study Design & Arms
AllocationRANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Part 1A Dose Escalation monotherapyEXPERIMENTAL -
Part 1B Dose Escalation in combination with fulvestrantEXPERIMENTAL -
Part 1C Dose Escalation in combination with palazestrantEXPERIMENTAL -
Part 2A Dose Expansion monotherapy - mBCEXPERIMENTAL -
Part 2A Dose Expansion monotherapy - mCRPCEXPERIMENTAL -
Part 2B Dose Expansion in combination with fulvestrant OR palazestrant-mBC @ RDE 1EXPERIMENTAL -
Part 2B Dose Expansion in combination with fulvestrant OR palazestrant-mBC @ RDE 2EXPERIMENTAL -
Interventions
NameTypeDescription
OP-3136DRUGSelective inhibitor of HAT enzymes KAT6A and KAT6B
FulvestrantDRUGSelective estrogen receptor degrader (SERD)
PalazestrantDRUGComplete estrogen receptor antagonist (CERAN)
Unlock Study Design Details
Eligibility Criteria
Age Range18 Years — N/A
SexALL
Healthy VolunteersNo
Study Sites8

Key Inclusion Criteria: * Participants with advanced or metastatic ER+HER2- breast cancer, mCRPC, or NSCLC (Part 1) or advanced or metastatic ER+HER2- BC or mCRPC (Part 2). * Part 1A (Dose escalation for OP-3136 monotherapy): Participants must have a tumor that is unresectable or metastatic and for...

Countries:United StatesAustralia
Unlock Eligibility Criteria
Competitive Landscape -Breast Cancer 408 trials
CompanyTickerTrialsLead PhaseDrugs
Merck & Co., Inc.MRK12PHASE3Pembrolizumab, Paclitaxel, Doxorubicin, Epirubicin, Cyclophosphamide
AstraZeneca PLCAZN47PHASE3Fulvestrant, Capivasertib, Trastuzumab Deruxtecan, Paclitaxel, Trastuzumab
Gilead Sciences, Inc.GILD13PHASE3Sacituzumab Govitecan-hziy, Eribulin, Capecitabine Product, Gemcitabine, Vinorelbine
Eli Lilly and CompanyLLY27PHASE3Abemaciclib, Standard Adjuvant Endocrine Therapy, Imlunestrant, Tamoxifen, Anastrozole
BioNTech SE Sponsored ADRBNTX7PHASE3DB-1303/BNT323, T-DM1, Capecitabine, Paclitaxel, Nab-paclitaxel
Novartis AG Sponsored ADRNVS30PHASE3Ribociclib, Alpelisib, Fulvestrant, Trastuzumab, Pertuzumab
Olema Pharmaceuticals, Inc.OLMA5PHASE3Palazestrant, Fulvestrant, Anastrozole, Letrozole, Exemestane
Pfizer Inc.PFE34PHASE3ARV-471, Fulvestrant, PF-07220060, letrozole, abemaciclib
BeOne Medicines Ltd. Sponsored ADRONC6PHASE3BGB-43395, Letrozole, Abemaciclib, Palbociclib, Ribociclib
Jazz Pharmaceuticals Public Limited CompanyJAZZ3PHASE3Zanidatamab, Trastuzumab, Eribulin, Vinorelbine, Gemcitabine
Celcuity Inc.CELC3PHASE3Gedatolisib, Palbociclib, Fulvestrant, Alpelisib, Arm A: Gedatolisib + Palbociclib + Fulvestrant
Relay Therapeutics, Inc.RLAY2PHASE3RLY-2608, Capivasertib, Fulvestrant, Palbociclib, Ribociclib
GSK plc Sponsored ADRGSK2PHASE3Niraparib
Greenwich LifeSciences, Inc.GLSI1PHASE3GLSI-100
Bristol-Myers Squibb CompanyBMY5PHASE2Iza-bren, Nab-paclitaxel, Paclitaxel, Capecitabine, Carboplatin
BriaCell Therapeutics CorpBCTX2PHASE3SV-BR-1-GM, Cyclophosphamide, Interferon infiltration of the inoculation site, Retifanlimab, Treatment of Physician's Choice
Incyte CorporationINCY4PHASE2Ruxolitinib, Capecitabine, Regorafenib, Pembrolizumab, Axatilimab
Natera, Inc.NTRA3PHASE2Discontinuation of the anti-HER2 maintenance therapy
Puma Biotechnology, Inc.PBYI3PHASE2Neratinib, Loperamide, Colesevelam, Alisertib, Endocrine therapy
Immutep Ltd Sponsored ADRIMMP1PHASE2eftilagimod alpha, Paclitaxel
Unlock Competitive Intelligence
Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT06784193primaryCompletionDate: changed
LOWMay 24, 2026NCT06784193studyFirstPostDate: changed