A Phase 2 interventional study of azenosertib in High-Grade Serous Ovarian, Fallopian Tube or Primary Peritoneal Cancer, sponsored by K-Group, Beta, Inc., a wholly owned subsidiary of Zentalis Pharmaceuticals, Inc. Recruiting at 89 sites in 9 countries. Open to female participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-10-30.
Sponsored by K-Group, Beta, Inc., a wholly owned subsidiary of Zentalis Pharmaceuticals, Inc · Phase 2, Interventional, and Treatment
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Among 1,778 studies in Ovarian Neoplasms with a site in United States — 280 open to participants now, 455 under way, 46 of them phase 3. Ovarian Neoplasms · United States.
Among the 1,778 studies in Ovarian Neoplasms with a site in United States, this one is the 180th largest by planned enrollment of the 1,497 interventional ones that give a count, is one of 76 that started in 2022, is one of 485 in phase 2, reaches primary completion later than 116 of the 453 other live ones, and was the 1,416th registered.
3,385 studies on the registry are indexed under Ovarian Neoplasms; 792 are open to participants now.
Browse Ovarian Neoplasms studies →280 of the 1,778 studies in Ovarian Neoplasms with a site in United States are open now. Recruiting first, the newest first:
Michael J. Goodheart · Sites in United States
Ages 18–99 · Women only
Crescent Biopharma, Inc. · Sites in United States
Ages 18+
Merck Sharp & Dohme LLC · Sites in United States, Israel, Taiwan
Ages 18+ · Women only
University of Alabama at Birmingham · Sites in United States
Ages 18+
GE Healthcare · Sites in United States, Sweden
Ages 18+
A study can be open while its sites in United States have not opened yet or have stopped. Only those recruiting at a site in United States →
Of the 605 Ovarian Neoplasms studies recruiting now, 442 (73%) set no upper age limit and 107 (18%) stop at 75 or younger; 39 take children under 18; 45 take healthy volunteers.
This study: 18 Years and older · female · no healthy volunteers.
The full table on the hub →This tab as a report to print or save as PDF → With an account.
1,778 studies; the count open now beside each. This study's row is marked.
A study in two phases is counted once above. Listed by phase, each with its combined phases: Phase 1 768 · Phase 2 718 · Phase 3 114 · Phase 4 8
First in 1980; this study’s year is marked. 76 started in 2022.
By drug class, each counting the studies that test any of its medicines:
This study's planned enrollment of 310 is above the median of 54 across 2,552 interventional studies indexed under Ovarian Neoplasms.
Median enrollment 47 across the 1,497 interventional studies, 176 across the 195 observational. Of the 1,208 that completed or were terminated, 445 (37%) have results posted.
This tab as a report to print or save as PDF → With an account.
712 of 1,778 have an industry lead sponsor. The 10 most frequent:
K-Group, Beta, Inc., a wholly owned subsidiary of Zentalis Pharmaceuticals, Inc is the lead sponsor of 8 studies on the registry; 3 are open to participants now.
Of its 5 completed or terminated interventional studies of FDA-regulated products, 0 (0%) have results posted.
K-Group, Beta, Inc., a wholly owned subsidiary of Zentalis Pharmaceuticals, Inc has 3 studies filed under Ovarian Neoplasms — fewer than ten, so there is no comparison to draw.
163 of the studies in Ovarian Neoplasms with a site in United States that are under way reach primary completion within a year, 9 of them phase 3. Phase 3 first, then by date:
| Study | Primary completion |
|---|---|
| NCT03815643Phase 3EMD Serono Research & Development Institute, Inc.Avelumab Program Rollover Study | 2026-11-24 |
| NCT05281471Phase 3Genelux CorporationEfficacy & Safety of Olvi-Vec and Platinum-doublet + Bevacizumab Compared to Physician's Choice of Chemotherapy and Bevacizumab in Platinum-Resistant/Refractory Ovarian Cancer (PRROC) (OnPrime, GOG-3076) | 2026-12 |
| NCT04498117Phase 3CanariaBio Inc.Oregovomab Plus Chemo in Newly Diagnosed Patients With Advanced Epithelial Ovarian Cancer Following Optimal Debulking Surgery | 2026-12-26 |
| NCT05059522Phase 3PfizerContinued Access Study for Participants Deriving Benefit in Pfizer-Sponsored Avelumab Parent Studies That Are Closing | 2026-12-31 |
| NCT04095364Phase 3NRG OncologyLetrozole With or Without Paclitaxel and Carboplatin in Treating Patients With Stage II-IV Ovarian, Fallopian Tube, or Primary Peritoneal Cancer | 2027-02-01 |
Add all 163 to your calendar (.ics) → With an account.
Among the 1,778 studies in Ovarian Neoplasms with a site in United States, from their registry updates:
This tab as a report to print or save as PDF → With an account.
This is a multi-part Phase 2 study to evaluate the efficacy and safety of azenosertib (ZN-c3) in subjects with Platinum-Resistant, High-Grade Serous Ovarian, Fallopian Tube, or Primary Peritoneal Cancer. Part 2 of the study will be conducted in subjects whose tumors are Cyclin E1 positive as determined by central review using the Sponsor's investigational clinical trial assay.
A Phase 2 study to evaluate the efficacy and safety of azenosertib (ZN-c3) in subjects with Platinum-Resistant, High-Grade Serous Ovarian, Fallopian Tube, or Primary Peritoneal Cancer. Azenosertib is a selective and orally bioavailable inhibitor of WEE1. By inhibiting WEE1, azenosertib enables cell cycle progression, despite high levels of DNA damage, thereby resulting in the accumulation of DNA damage leading to mitotic catastrophe and cancer cell death.
The study consists of two parts:
Part 1: All comers, no biomarker status required (completed enrollment)
Part 2: Cyclin E1 positive protein expression required
The criteria were revised on the registry on Sep 29, 2026. See what changed
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Prior therapy:
Exclusion Criteria:
Any of the following treatment interventions within the specified time frame prior to C1D1:
A serious illness or medical condition(s) including, but not limited to:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
A drug or device being studied in a clinical trial.
It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.
The amount of disease can be tracked with a defined measurement, so the study can see whether it shrinks or grows. It might be a tumour measured on a scan or, in some blood cancers such as myeloma, a marker measured in blood or urine.
The criteria or the study team say which measurement counts — having no tumour visible on a scan does not by itself rule you out.
The standard rules for measuring tumours on CT or MRI scans, to tell whether a cancer is shrinking, stable or growing during treatment.
“Measurable disease per RECIST 1.1” usually means at least one tumour 10 mm or more at its longest on a CT scan, or a lymph node 15 mm or more across its short axis.
A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.
Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.
Relapsed: the illness came back after treatment had worked. Refractory: it did not respond to treatment, or stopped responding while still on it.
Stem cell (bone marrow) transplants. Allogeneic uses cells from a donor; autologous uses your own cells, collected earlier and given back.
CYP3A is a group of enzymes, mainly CYP3A4, in the liver and gut that break down many medicines. Some medicines, supplements and foods (grapefruit, St John’s wort) slow them down or speed them up, which changes how much of a study drug stays in the body.
Studies list them so they can be avoided or switched; bring a list of everything you take, including supplements.
Cancer deposits in the brain from a cancer that started elsewhere in the body (CNS metastases include the spinal cord).
Studies differ: some leave out any brain metastases, some accept ones treated and stable for some weeks. Check what this study allows.
Cancer that has spread to the leptomeninges, the thin layers covering the brain and spinal cord, and the fluid between them. It is not the same as brain metastases.
Criteria often treat it separately, and many studies leave it out even where treated brain metastases are allowed.
The New York Heart Association’s four classes of how much heart failure limits physical activity.
Studies set their own limit — many outside heart failure leave out class III–IV, while heart failure studies may ask for a particular class. Check the class this study names.
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).
Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.
Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.
Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.
A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.
Read whether the line is about a condition or about medicines, and which medicines and doses it means.
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.
After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.
Investigational drug or device
A drug or device being studied in a clinical trial.
It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Measurable disease
The amount of disease can be tracked with a defined measurement, so the study can see whether it shrinks or grows. It might be a tumour measured on a scan or, in some blood cancers such as myeloma, a marker measured in blood or urine.
The criteria or the study team say which measurement counts — having no tumour visible on a scan does not by itself rule you out.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
RECIST
The standard rules for measuring tumours on CT or MRI scans, to tell whether a cancer is shrinking, stable or growing during treatment.
“Measurable disease per RECIST 1.1” usually means at least one tumour 10 mm or more at its longest on a CT scan, or a lymph node 15 mm or more across its short axis.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ECOG performance status
A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.
Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Relapsed and refractory
Relapsed: the illness came back after treatment had worked. Refractory: it did not respond to treatment, or stopped responding while still on it.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Allogeneic and autologous transplant
Stem cell (bone marrow) transplants. Allogeneic uses cells from a donor; autologous uses your own cells, collected earlier and given back.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
CYP3A (CYP3A4) inhibitors and inducers
CYP3A is a group of enzymes, mainly CYP3A4, in the liver and gut that break down many medicines. Some medicines, supplements and foods (grapefruit, St John’s wort) slow them down or speed them up, which changes how much of a study drug stays in the body.
Studies list them so they can be avoided or switched; bring a list of everything you take, including supplements.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Brain metastases
Cancer deposits in the brain from a cancer that started elsewhere in the body (CNS metastases include the spinal cord).
Studies differ: some leave out any brain metastases, some accept ones treated and stable for some weeks. Check what this study allows.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Leptomeningeal disease
Cancer that has spread to the leptomeninges, the thin layers covering the brain and spinal cord, and the fluid between them. It is not the same as brain metastases.
Criteria often treat it separately, and many studies leave it out even where treated brain metastases are allowed.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
NYHA class (heart failure)
The New York Heart Association’s four classes of how much heart failure limits physical activity.
Studies set their own limit — many outside heart failure leave out class III–IV, while heart failure studies may ask for a particular class. Check the class this study names.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Clinically significant
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Childbearing potential
Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).
Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Cancer (malignancy)
Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.
Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Immunosuppression
A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.
Read whether the line is about a condition or about medicines, and which medicines and doses it means.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
HIV
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hepatitis B tests
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hepatitis C tests
Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.
After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Azenosertib 400mg administered once daily on a 5 days on, 2 days off intermittent schedule.
Drug: azenosertib
Azenosertib 400mg administered once daily on a 5 days on, 2 days off intermittent schedule
Drug: azenosertib
Azenosertib 300mg administered once daily on a 5 days on, 2 days off intermittent schedule
Drug: azenosertib
Azenosertib 400mg administered once daily on a 5 days on, 2 days off intermittent schedule
Drug: azenosertib
Azenosertib 400mg administered once daily on a 5 days on, 2 days off intermittent schedule
Drug: azenosertib
Azenosertib (ZN-c3) will be administered orally.
Also known as: ZN-c3
Objective Response Rate (ORR) defined by RECIST v1.1 [Part 2]
Participants who achieve partial response (PR) or complete response (CR) per RECIST v1.1 criteria.
Time frame: Up to approximately 12 months from the enrollment of the last subject
Duration of response (DOR) defined by RECIST v1.1 [Part 2]
Time from the date of first documented response (CR or PR that is subsequently confirmed per RECIST v1.1) until the date of progressive disease (PD) or death.
Time frame: Up to approximately 12 months from the enrollment of the last subject
Progression free survival (PFS) defined by RECIST v1.1 [Part 2]
Time from the date of first dose until the date of PD or death.
Time frame: Up to approximately 12 months from the enrollment of the last subject
Clinical Benefit Rate (CBR) defined by RECIST v1.1 [Part 2]
The percentage of participants who have at least 1 confirmed response of CR or PR, or stable disease for at least 16 weeks before any evidence of progression.
Time frame: Up to approximately 12 months from the enrollment of the last subject
CA-125 response by GCIG criteria [Part 2]
The GCIG CA-125 response was defined as at least 50% reduction in CA-125 levels from baseline.
Time frame: Up to approximately 12 months from the enrollment of the last subject
Number of Subjects experiencing treatment emergent adverse events (TEAEs) [Part 2]
Time frame: Up to approximately 12 months from the enrollment of the last subject
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Started Feb 2022 (actual). Primary completion is estimated for Dec 2026, 57 months after the start.
Of 116 industry-sponsored phase 2 interventional studies under Ovarian Neoplasms, half reached primary completion within 37 months of starting (the median), counting those still running; a quarter within 23 and three quarters within 51. This study's planned 57 months is above that.
Counting every sponsor, half of 344 studies reached it within 47 months; a quarter within 33 and three quarters within 72.
How these figures are worked out, and which studies are left out of them.
From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
Eligibility is decided by the study team. Share this record with your doctor or contact the team directly.
Contact study teamGet an email when the registry record changes — status, dates, results — or when someone posts here.
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Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.
Studies of the drug tested here: Azenosertib
K-Group, Beta, Inc., a wholly owned subsidiary of Zentalis Pharmaceuticals, Inc