Search | Clinical Trials Finder

These results were retrieved from the live ClinicalTrials.gov registry. Filters and sort order apply to this result list.

ClinicalTrials.gov public records Last synced Nov 15, 2026, 8:48 AM EST

All trial information on this site comes from the official ClinicalTrials.gov public API (clinicaltrials.gov/api/v2), run by the U.S. National Library of Medicine. We only display that public information; we do not add opinions, endorsements, or any other intent. Always review the official ClinicalTrials.gov record for the latest information.

Showing 1–24 of 164 matching trials from the live ClinicalTrials.gov search.

Filters: Condition: HR-positive Breast Cancer Clear all

Conditions: Breast Cancer Metastatic
Interventions: Avasopasem; Drug
Lead sponsor: The University of Texas Health Science Center at San Antonio; Other
Eligibility: 18 Years and older
Enrollment: 35 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2025 – 2028
U.S. locations: 1
States / cities: San Antonio, Texas

Conditions: Breast Cancer
Interventions: Not listed
Lead sponsor: Pfizer; Industry
Eligibility: 18 Years and older · Female only
Enrollment: 195 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2019
U.S. locations: 1
States / cities: New York, New York

Conditions: PIK3CA Mutations, Advanced Solid Tumors, Adult, Endometrial Cancer, HR Positive/HER-2 Negative Breast Cancer, HER2-low Breast Cancer
Interventions: CGT6297; Drug
Lead sponsor: Cogent Biosciences, Inc.; Industry
Eligibility: 18 Years and older
Enrollment: 90 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2026 – 2029
U.S. locations: 12
States / cities: Scottsdale, Arizona • Los Angeles, California • Palo Alto, California + 9 more

Conditions: Breast Neoplasms
Interventions: Abemaciclib, Tersolisib, Letrozole, Anastrozole, Exemestane; Drug
Lead sponsor: Eli Lilly and Company; Industry
Eligibility: 18 Years and older
Enrollment: 120 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2026 – 2028
U.S. locations: 9
States / cities: Los Alamitos, California • Lakewood, Colorado • Atlanta, Georgia + 6 more

Conditions: Solid Tumor, Adult, Metastatic Breast Cancer, Advanced Breast Cancer, HER2 Mutation-Related Tumors, HER2-positive Metastatic Breast Cancer, KRAS Mutant Metastatic Colorectal Cancer, Metastatic Lung Cancer, Metastatic Colorectal Cancer, Advanced Lung Cancer, HR-positive, HER2-negative Advanced Breast Cancer, HER2-positive Advanced Breast Cancer
Interventions: BBO-10203, Trastuzumab, Fulvestrant, Ribociclib, FOLFOX, Bevacizumab; Drug
Lead sponsor: TheRas, Inc., d/b/a BBOT (BridgeBio Oncology Therapeutics); Industry
Eligibility: 18 Years and older
Enrollment: 392 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2024 – 2028
U.S. locations: 19
States / cities: Duarte, California • Los Angeles, California • San Diego, California + 13 more

Conditions: HR+ Breast Cancer, Triple Negative Breast Cancer (TNBC), CCNE1 Amplified Advanced Solid Tumors, HR+ HER2- Breast Cancer
Interventions: NKT5097 CDK2/CDK4 dual degrader, Fulvestrant, Letrozole; Drug
Lead sponsor: NiKang Therapeutics, Inc.; Industry
Eligibility: 18 Years and older
Enrollment: 361 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2025 – 2027
U.S. locations: 19
States / cities: Duarte, California • La Jolla, California • Denver, Colorado + 16 more

Conditions: ER-Positive HER2-Negative Breast Cancer
Interventions: AZD9833, AZD9833 Placebo, Anastrozole, Anastrozole placebo, Letrozole, Letrozole placebo, Palbociclib, Abemaciclib, Luteinizing hormone-releasing hormone (LHRH) agonist, Ribociclib; Drug
Lead sponsor: AstraZeneca; Industry
Eligibility: 18 Years to 130 Years
Enrollment: 315 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2021 – 2028
U.S. locations: 64
States / cities: Phoenix, Arizona • Hot Springs, Arkansas • Little Rock, Arkansas + 56 more

Conditions: Breast Cancer, Ovarian Cancer, Endometrial Cancer, PIK3CA Mutation, HER2- Negative Breast Cancer, Advanced Breast Cancer, Unresectable Solid Tumor, Hormone Receptor Positive Tumor, Cervical Cancer
Interventions: RGT-490; Drug
Lead sponsor: Regor Pharmaceuticals Inc.; Industry
Eligibility: 18 Years and older
Enrollment: 63 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2026 – 2028
U.S. locations: 6
States / cities: Los Angeles, California • Pittsburgh, Pennsylvania • Houston, Texas + 2 more

Conditions: HR+ HER2- Metastatic Breast Cancer, Ovarian Cancer, Fallopian Tube Cancer, Primary Peritoneal Cancer, Triple Negative Breast Cancer, Male Breast Cancer
Interventions: PF-06873600, Endocrine Therapy 1, Endocrine Therapy 2; Drug
Lead sponsor: Pfizer; Industry
Eligibility: 18 Years and older
Enrollment: 155 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2018 – 2024
U.S. locations: 39
States / cities: Birmingham, Alabama • Scottsdale, Arizona • Fayetteville, Arkansas + 22 more

Conditions: Metastatic Breast Cancer, Locally Advanced Breast Cancer, Breast Cancer
Interventions: Samuraciclib, Fulvestrant; Drug
Lead sponsor: Carrick Therapeutics Limited; Industry
Eligibility: 18 Years and older
Enrollment: 60 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2023 – 2025
U.S. locations: 5
States / cities: Ocala, Florida • Baltimore, Maryland • Kansas City, Missouri + 2 more

Conditions: Hormone Receptor Positive, HER2-low or HER2-ultralow, Unresectable or Metastatic Breast Cancer
Interventions: Patritumab deruxtecan, Trastuzumab deruxtecan; Drug
Lead sponsor: Daiichi Sankyo; Industry
Eligibility: 18 Years and older
Enrollment: 220 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2026 – 2032
U.S. locations: 12
States / cities: Los Angeles, California • Stanford, California • Aurora, Colorado + 8 more

Conditions: Estrogen Receptor Positive, Progesterone Receptor Positive, Recurrent Breast Carcinoma, Stage IIIB Breast Cancer, Stage IIIC Breast Cancer, Stage IV Breast Cancer
Interventions: Alisertib, Fulvestrant, Laboratory Biomarker Analysis; Drug · Other
Lead sponsor: Mayo Clinic; Other
Eligibility: 18 Years and older · Female only
Enrollment: 10 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2014 – 2018
U.S. locations: 1
States / cities: Rochester, Minnesota

Conditions: Hormone Receptor Positive Breast Carcinoma, HER2-negative Breast Cancer
Interventions: OP-1250; Drug
Lead sponsor: Olema Pharmaceuticals, Inc.; Industry
Eligibility: 18 Years and older
Enrollment: 153 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2020 – 2024
U.S. locations: 15
States / cities: Los Angeles, California • Aurora, Colorado • Deerfield Beach, Florida + 11 more

Conditions: Neoplasms, Breast Neoplasms, Breast Neoplasms, Triple-Negative, Breast Cancer, Breast Neoplasms, Hormone Receptor Positive/HER2 Negative
Interventions: CX-2009, CX-072; Drug
Lead sponsor: CytomX Therapeutics; Industry
Eligibility: 18 Years and older
Enrollment: 125 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2020 – 2023
U.S. locations: 27
States / cities: La Jolla, California • Los Angeles, California • Santa Monica, California + 22 more

Conditions: Breast Cancer, Solid Tumors
Interventions: PF-07220060 + PF-07104091 combination dose escalation, PF-07104091 + PF-07220060 + fulvestrant dose expansion, PF-07104091 + PF-07220060 + letrozole dose expansion; Drug
Lead sponsor: Pfizer; Industry
Eligibility: 18 Years and older
Enrollment: 235 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2022 – 2027
U.S. locations: 12
States / cities: Los Angeles, California • Santa Monica, California • Boston, Massachusetts + 5 more

Conditions: Metastatic Breast Cancer, Stage IV Breast Cancer, Breast Cancer, Breast Cancer Stage IV, Breast Cancer Metastatic, HER2-negative Breast Cancer, HER2 Negative Breast Carcinoma, Hormone-receptor-positive Breast Cancer
Interventions: Abemaciclib, Radiation Therapy; Drug · Radiation
Lead sponsor: Memorial Sloan Kettering Cancer Center; Other
Eligibility: 18 Years and older
Enrollment: 28 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2024 – 2028
U.S. locations: 7
States / cities: Basking Ridge, New Jersey • Middletown, New Jersey • Montvale, New Jersey + 4 more

Conditions: HR-positive Breast Cancer
Interventions: Vitamin B12, Blood collection, Brief Pain Inventory - Short Form survey, FACT-ES Trial Outcome Index (Version 4), Questionnaire to Assess Adherence to Aromatase Inhibitors, Demographics Questionnaire; Dietary Supplement · Other
Lead sponsor: Case Comprehensive Cancer Center; Other
Eligibility: 19 Years and older
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2021 – 2025
U.S. locations: 1
States / cities: Cleveland, Ohio

Conditions: Breast Cancer
Interventions: A CDK4/6 inhibitor different from the first that the participant had received, plus fulvestrant., Treatment of physician's choice; Drug
Lead sponsor: University of California, San Diego; Other
Eligibility: 18 Years and older
Enrollment: 105 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2026 – 2028
U.S. locations: 1
States / cities: La Jolla, California

Conditions: Brain Metastases, HR+ Metastatic Breast Cancer
Interventions: Stereotactic Radiosurgery (SRS), Abemaciclib, Endocrine therapy; Radiation · Drug
Lead sponsor: H. Lee Moffitt Cancer Center and Research Institute; Other
Eligibility: 18 Years and older
Enrollment: 31 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2021 – 2027
U.S. locations: 2
States / cities: Tampa, Florida • Columbus, Ohio

Conditions: Advanced/Metastatic HER2-negative Breast Cancer
Interventions: No drug; Other
Lead sponsor: Daiichi Sankyo; Industry
Eligibility: 18 Years and older
Enrollment: 1,415 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2025
U.S. locations: 1
States / cities: New York, New York

Conditions: Advanced Solid Tumor, Advanced Breast Cancer, Metastatic Breast Cancer, Hormone-receptor-positive Breast Cancer, Hormone Receptor Positive Breast Carcinoma, Hormone Receptor Positive Malignant Neoplasm of Breast, HER2-negative Breast Cancer, Hormone Receptor Positive HER-2 Negative Breast Cancer
Interventions: BGB-43395, Fulvestrant, Letrozole, Elacestrant, Anti-Diarrheal Agent; Drug
Lead sponsor: BeOne Medicines; Industry
Eligibility: 18 Years and older
Enrollment: 433 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2023 – 2029
U.S. locations: 9
States / cities: Denver, Colorado • Lake Mary, Florida • Detroit, Michigan + 6 more

Conditions: Hormone Receptor Positive Breast Cancer, HER-2 Positive Breast Cancer
Interventions: Abemaciclib, Trastuzumab, Fulvestrant, Standard of Care Single Agent Chemotherapy; Drug
Lead sponsor: Eli Lilly and Company; Industry
Eligibility: 18 Years and older · Female only
Enrollment: 237 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2016 – 2023
U.S. locations: 32
States / cities: Bakersfield, California • Fullerton, California • Los Angeles, California + 22 more

Conditions: Breast Cancer, Metastatic Breast Cancer, HR+/HER- Metastatic Breast Cancer
Interventions: FoundationOne® Liquid CDx (F1LCDx), Reflex tissue biopsy; Diagnostic Test
Lead sponsor: Yale University; Other
Eligibility: 18 Years and older
Enrollment: 155 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2026 – 2031
U.S. locations: 1
States / cities: New Haven, Connecticut

Conditions: Metastatic Breast Cancer, HER2-negative Breast Cancer
Interventions: Dapagliflozin 10Mg Tab; Drug
Lead sponsor: Saint Luke's Health System; Other
Eligibility: 18 Years to 65 Years
Enrollment: 25 participants
Healthy volunteers: Healthy volunteers not accepted
Timeline: 2021 – 2023
U.S. locations: 1
States / cities: Kansas City, Missouri

Search by objective public record fields.

Clinical Trial of Avasopasem in Patients With Metastatic Hormone Receptor Positive Breast Cancer With Progression on a CDK 4/6 Inhibitor and Hormonal Therapy

RW Treatment Patterns and Outcomes in Postmenopausal HR+/HER2- mBC Patients Treated With Palbociclib Plus Letrozole as Initial Endocrine Therapy at Community Oncology Practices in the U.S.

A Study of Mutant Selective-Inhibitor (CGT6297), in Patients With Advanced Solid Tumors

A Study of Tersolisib (LY4064809) and Abemaciclib With Hormone Therapies in Participants With PIK3CA-Mutated Early Breast Cancer

Open-Label Study of BBO-10203 in Subjects With Advanced Solid Tumors

A Study With NKT5097 for Adults With Advanced/Metastatic Solid Tumors

Phase III Study to Assess AZD9833+ CDK4/6 Inhibitor in HR+/HER2-MBC With Detectable ESR1m Before Progression (SERENA-6)

Study of RGT-490 in Patients With PIK3CA-Mutated Advanced Solid Tumors

A Study of PF-06873600 in People With Cancer

A Study of Samuraciclib in Combination With Fulvestrant in Metastatic or Locally Advanced Breast Cancer in Adult Participants

A Study of Patritumab Deruxtecan (HER3-DXd) in Combination With Trastuzumab Deruxtecan (T-DXd) in Participants With HR-Positive, HER2-Low or HER2-Ultralow Unresectable or Metastatic Breast Cancer

Alisertib and Fulvestrant in Treating Patients With Hormone Receptor Positive Breast Cancer That is Metastatic or Locally Advanced and Cannot Be Removed by Surgery

A Dose Escalation/Expansion Study of Oral OP-1250 in Subjects With Advanced and/or Metastatic HR+, HER2- Breast Cancer

Study to Evaluate the Safety and Antitumor Activity of CX-2009 Monotherapy and in Combination With CX-072 in Advanced Breast Cancer

A Study to Learn About the Study Medicine (Called PF-07220060 in Combination With PF-07104091) In Participants With Breast Cancer and Solid Tumors

A Study of Abemaciclib and Radiation Therapy in People With Metastatic Breast Cancer

Vitamin B12 for Aromatase Inhibitors Associated Musculoskeletal Symptoms in Breast Cancer

Artificial Intelligence and Machine Learning to Guide CDK4/6 Inhibitor Rechallenge in Breast Cancer.

SRS & Abemaciclib w/wo Imlunestrant in the Management of HR+/HER2- Breast CA Brain Metastases

Real-World Outcomes of Patients With Metastatic Breast Cancer After Treatment With First-Line ET+CDK4/6i

BGB-43395 Alone or as Part of Combination Therapies in Participants With Breast Cancer and Other Advanced Solid Tumors

A Study of Abemaciclib (LY2835219) in Women With HR+, HER2+ Locally Advanced or Metastatic Breast Cancer

Prospective Study to Evaluate the Clinical Utility of ctDNA Tumor Fraction (TF) for Detection of Estrogen Receptor 1 (ESR1) Mutations in (Human Epidermal Growth Factor Receptor) HR+/HER2- Metastatic Breast Cancer (MBC)

Alpelisib, Fulvestrant and Dapagliflozin for the Treatment of HR+, HER2 -, PIK3CA Mutant Metastatic Breast Cancer