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Acalabrutinib

Phase 2

Ovarian Cancer | Small molecule | Oncology |Merck & Company, Inc.|Last Updated: May 13, 2026

Target and mechanism

Molecular targetBTK
Target classInhibitor
ModalitySmall molecule

Success Probability

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Market & Valuation

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Trial Design

RandomizedCONTROLLEDBiomarker
Total Trials1
Total Enrollment78

FDA Designations

No designations recorded

Clinical trial landscape

Acalabrutinib · 2 trials · 14 indications

Phase 2 1Phase 1 1
NCT02537444Acalabrutinib (ACP-196) Alone and in Combination With Pembrolizumab in Ovarian Cancer (KEYNOTE191)Ovarian Cancer
COMPLETED78 Analytics
PHASE2COMPLETED
Acalabrutinib (ACP-196) Alone and in Combination With Pembrolizumab in Ovarian Cancer (KEYNOTE191)
Ovarian CancerUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of Participants With Overall Response
Every 12 weeks for up to 2 years.

Per Response Evaluation Criteria In Solid Tumors Criteria (RECIST v1.1) for target lesions and assessed by MRI: Complete Response (CR), Disappearance of all target lesions; Partial Response (PR), \>=30% decrease in the sum of the longest diameter of target lesions; Overall Response (OR) = CR + PR

Number of Participants With Treatment Emergent Adverse Events (AEs)
104 weeks

Treatment-emergent AEs were defined as those events that occurred on or after the first dose of study drug, through the treatment phase, and within 30 days following the last dose of study drug.

Number of Participants With Grade 3-4 Adverse Events
104 weeks

Severity of AEs was graded using the Common Terminology Criteria for Adverse Events (CTCAE), version 4.03

Number of Participants With Grade 5 Adverse Events
104 weeks

Number of participants with CTCAE Grade 5 (fatal) adverse events

Number of Participants With Any Study-Drug Related AE
104 weeks

Study drug-related AEs were those assessed by investigator as related to study treatment.

Number of Participants With Grade 3-4 Study-Drug Related AE
104 weeks

The severity of the AEs was assessed by NCI CTCAE Version 4.03 or higher. Drug-related AEs were those assessed by investigator as related to study treatment.

Number of Participants With Grade 5 Study-Drug Related AE
104 weeks

Grade 5 (fatal) AEs assessed by investigator as related to study treatment.

Number of Participants With Any SAE
104 weeks

Serious AEs were those that resulted in death, were life-threatening, required or prolonged in-patient hospitalization, resulted in persistent or significant disability/incapacity, resulted in a congenital anomaly/birth defect in a neonate/infant born to a mother exposed to the investigational product, or were considered a significant medical event by the investigator based on medical judgment.

Number of Participants With Grade 3-4 Any SAE
104 weeks

Serious AEs were those that resulted in death, were life-threatening, required or prolonged in-patient hospitalization, resulted in persistent or significant disability/incapacity, resulted in a congenital anomaly/birth defect in a neonate/infant born to a mother exposed to the investigational product, or were considered a significant medical event by the investigator based on medical judgment. The severity of the AEs was assessed by NCI CTCAE Version 4.03 or higher.

Number of Participants With Grade 5 Any SAE
104 weeks

Grade 5 events were fatal events. Serious AEs were those that resulted in death, were life-threatening, required or prolonged in-patient hospitalization, resulted in persistent or significant disability/incapacity, resulted in a congenital anomaly/birth defect in a neonate/infant born to a mother exposed to the investigational product, or were considered a significant medical event by the investigator based on medical judgment.

Number of Participants With Any Study Drug-Related SAE
104 weeks

Serious AEs were those that resulted in death, were life-threatening, required or prolonged in-patient hospitalization, resulted in persistent or significant disability/incapacity, resulted in a congenital anomaly/birth defect in a neonate/infant born to a mother exposed to the investigational product, or were considered a significant medical event by the investigator based on medical judgment. Drug-related AEs were those assessed by investigator as related to study treatment.

Number of Participants With Any Grade 3-4 Study Drug-Related SAE
104 weeks

Serious AEs were those that resulted in death, were life-threatening, required or prolonged in-patient hospitalization, resulted in persistent or significant disability/incapacity, resulted in a congenital anomaly/birth defect in a neonate/infant born to a mother exposed to the investigational product, or were considered a significant medical event by the investigator based on medical judgment. The severity of the AEs was assessed by NCI CTCAE Version 4.03 or higher. Drug-related AEs were those assessed by investigator as related to study treatment.

Number of Participants With Any Grade 5 Study Drug-Related SAE
104 weeks

Grade 5 AEs were fatal events. Serious AEs were those that resulted in death, were life-threatening, required or prolonged in-patient hospitalization, resulted in persistent or significant disability/incapacity, resulted in a congenital anomaly/birth defect in a neonate/infant born to a mother exposed to the investigational product, or were considered a significant medical event by the investigator based on medical judgment. Drug-related AEs were those assessed by investigator as related to study treatment.

Number of Participants With AE Leading to Study Drug Discontinuation, Modification or Delay
104 weeks

AEs that discontinuation of study treatment, or a reduction in dosage, or a delay (temporary withholding) in treatment.

Number of Participants With AE Leading to Study Drug Discontinuation
104 weeks

An adverse event that resulted in the permanent discontinuation of study treatment in the study.

Number of Participants With AE Leading to Study Drug Delay
104 weeks

An adverse event that caused a temporary withholding of study treatment.

Number of Participants With AE Leading to Study Drug Modification
104 weeks

An adverse event that resulted in a reduction in the dosage of study treatment for that participant.

Secondary Endpoints

Overall Response Rate
104 weeks
Duration of Response
104 weeks
Progression-free Survival
104 weeks
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Regimen 1EXPERIMENTALDrug: acalabrutinib monotherapy
Regimen 2EXPERIMENTALDrug: Combination of acalabrutinib and pembrolizumab
Acalabrutinib plus PembrolizumabEXPERIMENTALA nonrandomized study that will be conducted in 2 stages. In the first stage, (Safety), subjects will receive Acalabrutinib Dose A orally administered (PO) twice daily (BID) in combination with Pembrolizumab Dose B administered every 3 weeks (Q3W). The second stage was an expansion of Cohorts with the same dose regimen as the first stage. An additional expansion in subjects with Myelofibrosis was planned but not conducted.

Interventions

NameTypeDescription
AcalabrutinibDRUG -
acalabrutinib and pembrolizumab combinationDRUG -
PembrolizumabDRUGIntravenous Administered (IV)
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Eligibility Criteria

Age Range18 Years to N/A
SexFEMALE
Healthy VolunteersNo
Study Sites2

Inclusion Criteria: * Women ≥ 18 years of age. * Histologically confirmed ovarian epithelial (including fallopian tube and primary peritoneal) carcinoma. * Progression of disease after the most recent anticancer treatment. At least 1 prior chemotherapy regimen must have included a taxane. * Platinu...

Countries:United States
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Competitive Landscape -Ovarian Cancer 176 trials

Top 20 of 59 competitors

CompanyTickerTrialsLead PhaseDrugs
Merck & Co., Inc.MRK5PHASE3Pembrolizumab, Paclitaxel, Bevacizumab, Docetaxel
AstraZeneca PLCAZN19PHASE3Olaparib
GSK plc Sponsored ADRGSK4PHASE3Niraparib
Eli Lilly and CompanyLLY8PHASE3Sofetabart Mipitecan, Paclitaxel, Topotecan, Gemcitabine, Pegylated liposomal doxorubicin
AbbVie, Inc.ABBV13PHASE3Mirvetuximab soravtansine plus Bevacizumab, Bevacizumab
Bristol-Myers Squibb CompanyBMY4PHASE3Rucaparib, Nivolumab
Genmab A/S Sponsored ADRGMAB5PHASE3Rina-S, Paclitaxel, Topotecan, Pegylated liposomal doxorubicin, Gemcitabine
Pfizer Inc.PFE4PHASE3Avelumab, Lorlatanib, Talazoparib, Pemetrexed, Axitinib
Corcept Therapeutics Incorporated.CORT2PHASE3Nab-paclitaxel/m^2, Relacorilant once daily
Verastem, Inc.VSTM4PHASE3avutometinib, Defactinib, Pegylated liposomal doxorubicin, Paclitaxel, Letrozole
Zentalis Pharmaceuticals, Inc.ZNTL3PHASE3Azenosertib
Imunon, Inc.IMNN3PHASE3IMNN-001, Paclitaxel, Carboplatin, Olaparib, Niraparib
Incyte CorporationINCY2PHASE3INCB123667
Genelux Corp.GNLX1PHASE3olvimulogene nanivacirepvec, Platinum chemotherapy: carboplatin or cisplatin, Non-platinum chemotherapy: Physician's Choice of gemcitabine, taxane or pegylated liposomal doxorubicin, Bevacizumab
Regeneron Pharmaceuticals, Inc.REGN4PHASE2Ubamatamab, Bevacizumab, Cemiplimab, Fianlimab, PLD
Novartis AG Sponsored ADRNVS4PHASE2Dabrafenib, Trametinib
BeOne Medicines Ltd. Sponsored ADRONC2PHASE3Pamiparib
IQVIA Holdings IncIQV1PHASE3Oregovomab, Paclitaxel, Carboplatin
Xencor, Inc.XNCR3PHASE2vudalimab
Exelixis, Inc.EXEL2PHASE2Cabozantinib
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Recent Changes (Last 90 Days)

MEDIUMJun 13, 2026NCT02362035TRIAL_REMOVED: changed
MEDIUMJun 13, 2026NCT02362035TRIAL_REMOVED: changed
MEDIUMJun 13, 2026NCT02362035TRIAL_REMOVED: changed
MEDIUMJun 13, 2026NCT02362035TRIAL_REMOVED: changed

Frequently asked questions about Acalabrutinib

What is Acalabrutinib used for?

Acalabrutinib is an investigational small molecule being studied for the treatment of ovarian cancer and follicular lymphoma (FL). It is a kinase inhibitor, specifically a -tinib class drug, and is being developed by Merck & Company, Inc. (MRK). It is currently in Phase 1 clinical development.

What does Acalabrutinib target?

Acalabrutinib is a kinase inhibitor, belonging to the -tinib class of drugs. It works by targeting kinases, which are enzymes involved in cell signaling and growth. This mechanism is being explored in the context of oncology, particularly for ovarian cancer and follicular lymphoma.

Who makes Acalabrutinib?

Acalabrutinib is being developed by Merck & Company, Inc., which trades under the ticker symbol MRK. The company is conducting clinical trials to evaluate the drug's safety and efficacy in treating certain cancers, including ovarian cancer and follicular lymphoma.

What phase is Acalabrutinib in?

Acalabrutinib is in Phase 1 clinical development. It is an investigational drug, meaning it has not been approved by regulatory authorities and is still undergoing clinical trials to assess its safety and effectiveness for the treatment of ovarian cancer and follicular lymphoma.

What clinical trials is Acalabrutinib in?

Acalabrutinib has been studied in two completed clinical trials. NCT02362035 was a Phase 1 trial combining Acalabrutinib with pembrolizumab for hematologic malignancies, including follicular lymphoma, with 161 participants. NCT02537444 was a Phase 2 trial of Acalabrutinib alone and with pembrolizumab in ovarian cancer, with 78 participants.

Is Acalabrutinib the same as ACP-196?

Yes, Acalabrutinib is also known as ACP-196. Clinical trial records refer to the drug as ACP-196, and it is being investigated under this name in studies for various cancers, including ovarian cancer and follicular lymphoma.