Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of ARV-471, an experimental PROTAC protein degrader, with abemaciclib (Verzenio®) CDK 4/6 inhibitor.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) estrogen receptor positive (ER+), HER2 negative (HER2-) breast cancer who have received treatment with a CDK 4/6 inhibitor and up to 2 lines of therapy for advanced/metastatic disease. View full eligibility criteria

Purpose: To study the anti-cancer activity and safety of giving the experimental anti-estrogen therapy giredestrant alone or with a CDK 4/6 inhibitor, an AKT inhibitor, a PI3K inhibitor, or chemotherapy.

Who is this for?: Women with advanced (some stage III) or metastatic (stage IV) estrogen-receptor positive (ER+), HER2-negative (HER2-) breast cancer whose disease progressed while taking anti-hormone therapy with a CDK 4/6 inhibitor and who have not received chemotherapy for metastatic disease. View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of niraparib PARP inhibitor with irinotecan chemotherapy.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) breast cancer with a BRCA1, BRCA2, ATM, and/or PALB2 mutation. View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of NBTXR3, an experimental nanoparticle, and stereotaxic ablative radiotherapy, with nivolumab (Opdivo®) or pembrolizumab (Keytruda®) PD-1 inhibitor.

Who is this for?: People with metastatic (stage IV) breast cancer that has spread to the soft tissues, lungs, or liver. View full eligibility criteria

Purpose: To study the safety, effects (good and bad), and anti-cancer activity of sacituzumab govitecan (Trodelvy®) antibody drug conjugate compared to standard of care chemotherapy.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) hormone receptor positive (ER+ and/or PR+), HER2 negative (HER2-) breast cancer who have received hormone therapy for advanced disease. You must have not yet received chemotherapy for advanced disease. View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of BLU-222, an experimental targeted therapy, with fulvestrant (Faslodex®) hormone therapy.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) estrogen receptor positive (ER+), HER2 negative (HER2-) breast cancer that progressed after treatment with a CDK 4/6 inhibitor. View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of P-MUC1C-ALLO1, an experimental CAR-T cell immunotherapy.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) breast cancer that has progressed on standard treatment. View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of GSK4381562 (SRF813), an experimental immunotherapy, alone and with dostarlimab (Jemperli®), a type of immunotherapy called a PD-1 inhibitor.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) breast cancer that has progressed on standard treatment. View full eligibility criteria

Purpose: To study the anti-cancer activity of the PARP inhibitor Talazoparib (Talzenna®) in breast cancer tumors that test positive for a tumor (not inherited) BRCA 1 or BRCA 2 mutation.

Who is this for?: Women with metastatic (stage IV) triple negative (ER-, PR-, HER2-) or hormone positive (ER+ and/or PR+), HER2 negative (HER2-) breast cancer. Your tumor must test positive for a BRCA 1 or a BRCA 2 tumor (not inherited) mutation. View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of ABM-168, an experimental MEK inhibitor.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) breast cancer with RAS, RAF, or NF-1 mutations who have no standard treatment options available. View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of LOXO-783, an experimental targeted therapy called a PI3Kα inhibitor, alone or with hormone therapy, targeted therapy, and/or chemotherapy.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) cancer (including breast cancer) with a PIK3CA mutation who have received up to 5 lines of treatment. If your cancer is estrogen receptor positive (ER+), you must be postmenopausal. View full eligibility criteria

Purpose: To look at the safety and effects (good and bad) of combining the immunotherapy drug avelumab (Bavencio®) with binimetinib, utomilumab, or PF-04518600.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) triple negative (ER-, PR- and HER2-) or ER Low (1%-10% ER) breast cancer who have not had more than three lines of chemotherapy and not more than one checkpoint inhibitor. View full eligibility criteria

Purpose: To study the safety, side effects, dose, and anti-cancer activity of giving PF-07248144 alone, in combination with fulvestrant, or with palbociclib and letrozole.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) estrogen-receptor positive (ER+), HER2-negative (HER2-) breast cancer whose disease progressed after receiving a CDK 4/6 inhibitor and anti-estrogen therapy. View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of MDNA11, an experimental immunotherapy, alone and with a checkpoint inhibitor.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) triple negative (ER-, PR-, HER2-) breast cancer. View full eligibility criteria

Purpose: To study the safety, effects (good and bad), and anti-cancer activity of using a tumor's genetic profile to select an FDA-approved targeted therapy.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) breast cancer with no standard treatment options. You must have results from a genomic or immunohistochemistry test approved by TAPUR. View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of ARV-471, an experimental hormone therapy, alone or with palbociclib (Ibrance®), a targeted therapy called a CDK 4/6 inhibitor.

Who is this for?: Postmenopausal women and men with locally advanced (some stage III) or metastatic (stage IV) estrogen receptor positive (ER+), HER2 negative (HER2-) breast cancer who have received hormone therapy for breast cancer and chemotherapy for advanced or metastatic disease. View full eligibility criteria

Purpose: To collect tumor samples that will be used to develop OncoPrism™, a test that helps providers predict response to immunotherapy.

Who is this for?: People with stage I, stage II, stage III, or stage IV (metastatic) triple negative (ER-, PR-, HER2-) breast cancer who have received or are planning to receive treatment with a PD-1/PD-L1 inhibitor. You must have received a biopsy before beginning treatment with a PD-1/PD-L1 inhibitor. View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of AZD9574, an experimental PARP inhibitor.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) HER2 negative (HER2-) breast cancer with a tumor or inherited BRCA1, BRCA2, PALB2, RAD51C, or RAD51D mutation. You must not have received treatment with a PARP inhibitor. You must have at least 1 tumor that has not been treated with radiation. View full eligibility criteria

Purpose: To study the safety, effects (good and bad), and best dose of DF1001 when it is given alone or with pembrolizumab (Keytruda®).

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) breast cancer that tests HER2 1+, 2+ or 3+ on the IHC (immunohistochemistry) tumor test and have not had more than three lines of chemotherapy. View full eligibility criteria

Purpose: To study the safety, effects (good and bad), and anti-cancer activity of datopotamab deruxtecan, an experimental antibody drug conjugate (ADC).

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) triple negative (ER-, PR-, HER2-) breast cancer who have not received chemotherapy or targeted therapy for advanced disease. You must not have received treatment with trastuzumab deruxtecan (Enhertu®) or sacituzumab govitecan (Trodelvy®). You must have at least 1 tumor that has not been treated with radiation. View full eligibility criteria

Purpose: To study the dose, safety, side effects, and anti-cancer activity of giving the targeted therapies capivasertib and palbociclib (Ibrance®) with the anti-estrogen therapy fulvestrant (Faslodex®).

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) estrogen receptor-positive (ER+), HER2-negative (HER2-) breast cancer. Your cancer must have progressed on anti-estrogen therapy. View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of elacestrant (Orserdu®) hormone therapy in combination with other anti-cancer therapies.

Who is this for?: People with metastatic (stage IV) estrogen receptor positive (ER+), HER2 negative (HER2-) breast cancer who have not received treatment with chemotherapy or elacestrant (Orserdu®) for advanced/metastatic disease. View full eligibility criteria

Purpose: To compare the safety and effects (good and bad) of giving immunotherapy along with chemotherapy versus giving chemotherapy alone to treat breast cancer that has spread to the chest wall.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) breast cancer that has spread to the chest wall and cannot be removed by surgery. View full eligibility criteria

Purpose: To study the safety, effects (good and bad), and anti-cancer activity of OP-1250, an experimental hormone therapy, with ribociclib (Kisqali®) CDK 4/6 inhibitor or alpelisib (Piqray®) PI3K inhibitor.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) hormone receptor positive (ER+ and/or PR+), HER2 negative (HER2-) breast cancer who have received 1-2 hormone therapies for advanced or metastatic disease. You must not have received more than 1 chemotherapy for advanced or metastatic disease. View full eligibility criteria

Purpose: To use genetic testing to match people to treatments and help doctors plan better treatments.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) breast cancer who have received at least 1 line of therapy for advanced disease or who have no standard treatment options available. View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of STX-478, an experimental PI3K inhibitor, alone or with fulvestrant (Faslodex®) hormone therapy.

Who is this for?: People with advanced (stage III) or metastatic (stage IV) hormone receptor positive (ER+ and/or PR+), HER2 negative (HER2-) breast cancer with a PI3K mutation. You must not have a PTEN, AKT, or mTOR mutation. View full eligibility criteria

Purpose: To study the safety, effects (good and bad), and anti-cancer activity of NX-1607, an experimental CBL-B inhibitor.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) triple negative (ER-, PR-, HER2-) breast cancer with no standard treatment options available. View full eligibility criteria

Purpose: To study the safety, effects (good and bad), and anti-cancer activity of IDE161, a PARG inhibitor.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) breast cancer with a BRCA1/2 mutation whose cancer has progressed on at least one previous therapy. View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of ARV-471, an experimental PROTAC protein degrader, with ribociclib (Kisqali®) CDK 4/6 inhibitor.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) estrogen receptor positive (ER+), HER2 negative (HER2-) breast cancer who have received treatment with a CDK 4/6 inhibitor and up to 2 lines of therapy for advanced/metastatic disease. View full eligibility criteria

Purpose: To create a registry to study metastatic lobular breast cancer, treatment patterns, and overall survival.

Who is this for?: People with stage IV (metastatic) lobular breast cancer. View full eligibility criteria

Purpose: To study if a mass response test can predict your cancer's response to potential treatments.

Who is this for?: People with stage I, stage II, stage III, or metastatic (stage IV) breast cancer that have malignant fluid. View full eligibility criteria

Purpose: To study the anti-cancer activity of choosing a targeted therapy for brain metastases based on the genetic mutations found in your tumors.

Who is this for?: People with metastatic (stage IV) breast cancer that has spread (metastasized) to your brain with a gene mutation or alteration in: NTRK, ROS1, CDK or PI3K. You must have already received at least one treatment for metastatic disease. View full eligibility criteria

Purpose: To study the safety, effects (good and bad), and anti-cancer activity of fulvestrant (Faslodex®) hormone therapy alone or with binimetinib (Mektovi®) MEK inhibitor.

Who is this for?: People with metastatic (stage IV) hormone receptor positive (ER+ and/or PR+), HER2 negative (HER2-) breast cancer with a NF1 mutation who have received treatment with a CDK 4/6 inhibitor. You must not have received more than 1 line of chemotherapy for metastatic disease. View full eligibility criteria

Purpose: To study if blood tests that look for tumor markers are as good as or better than imaging with PET and/or CT scans (the current standard of care) to determine if a tumor is growing.

Who is this for?: People with metastatic (stage IV) hormone positive (ER+ and/or PR+), HER2 negative (HER2-) breast cancer who are planning to have first line treatment for metastatic disease or have started treatment within the past month, and have at least one elevated tumor marker. View full eligibility criteria

Purpose: To study the anti-cancer activity, safety and side effects of giving the antibody-drug conjugate sacituzumab govitecan (Trodelvy®) to treat brain metastases (breast cancer that has spread to the brain).

Who is this for?: People with metastatic (stage IV) HER2 negative (HER2-) breast cancer that has spread to the brain. View full eligibility criteria

Purpose: To study the safety, effects (good and bad), and anti-cancer activity of giredestrant, an experimental hormone therapy, with targeted therapy compared to an aromatase inhibitor with targeted therapy.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) estrogen receptor positive (ER+), HER2 negative (HER2-) breast cancer who have received treatment with hormone therapy in combination with a CDK 4/6 inhibitor. You must not have received more than 2 lines of hormone therapy for advanced disease. View full eligibility criteria

Purpose: To study the safety, effects (good and bad), and anti-cancer activity of inavolisib, an experimental PI3K inhibitor, with fulvestrant (Faslodex®) hormone therapy compared to alpelisib (Piqray®) PI3K inhibitor with fulvestrant (Faslodex®).

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) hormone receptor positive (ER+ and/or PR+), HER2 negative (HER2-) breast cancer with a PIK3CA mutation. You must have received treatment with a CDK 4/6 inhibitor with hormone therapy as 1 of up to 2 lines of therapy for advanced/metastatic disease. View full eligibility criteria

Purpose: To study the safety, effects (good and bad), and anti-cancer activity of QBS72S, an experimental chemotherapy.

Who is this for?: People with metastatic (stage IV) breast cancer that has spread to the brain (brain metastases) or leptomeningeal metastasis visible on an MRI who have received chemotherapy. If you have brain metastasis, you must have at least 1 lesion that has not received treatment. View full eligibility criteria

Purpose: To study the safety, effects (good and bad), and anti-cancer activity of talazoparib (Talzenna®) PARP inhibitor.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) HER2 negative (HER2-) breast cancer with a PALB2 mutation who have received 0-3 treatments for advanced/metastatic disease. You must not have a BRCA1/2 mutation or received treatment with a PARP inhibitor. View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of E-602, an experimental immunotherapy, alone and with pembrolizumab (Keytruda®).

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) breast cancer that has progressed on standard treatment. View full eligibility criteria

Purpose: To study the safety, anti-cancer activity and side effects of giving an experimental immunotherapy made from cells from your own immune system.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) triple negative (ER-, PR-, HER2-) breast cancer. View full eligibility criteria

Purpose: To study the safety, anti-cancer activity and side effects of giving the experimental antibody-drug conjugate MORAb-202.

Who is this for?: Women with metastatic (stage IV) triple negative (ER-, PR-, HER2-) breast cancer who have already received a platinum-based chemotherapy and whose tumor tests positive for FRA. View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of HMBD-002, an experimental immunotherapy, alone or with pembrolizumab (Keytruda®) PD-L1 inhibitor.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) triple negative (ER-, PR-, HER2-) breast cancer with no standard treatment options available. View full eligibility criteria

Purpose: To conduct a test of your tumor to determine if there are approved therapies or clinical trials targeting the mutations or biomarkers found in your tumor.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) breast cancer. View full eligibility criteria

Purpose: To evaluate the safety and effects (good and bad) of eFT226 (Zotatifin), an experimental targeted therapy that blocks eIF4A1.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) breast cancer that has been treated with standard therapies and tests positive for a mutation in HER2 (ERRB2), ERBB3, FGFR1, FGFR2, or KRAS. View full eligibility criteria

Purpose: To compare the safety, effects (good and bad), and anti-cancer activity of stereotactic radiosurgery (radiation) before and after surgery.

Who is this for?: People with metastatic (stage IV) breast cancer that has spread to the brain (brain metastasis) who are planning to receive brain surgery. You must have at least 1 brain tumor that has not been treated with radiation. View full eligibility criteria

Purpose: To study the safety, effects (good and bad), and anti-cancer activity of gedatolisib, an experimental pan-PI3K and mTOR inhibitor, with fulvestrant (Faslodex®) hormone therapy, with or without palbociclib (Ibrance®) CDK 4/6 inhibitor.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) hormone receptor positive (ER+ and/or PR+), HER2 negative (HER2-) breast cancer with or without a PIK3CA mutation who have received treatment with a CDK 4/6 inhibitor with an aromatase inhibitor. You must not have received more than 1 chemotherapy for advanced disease or 2 lines of hormone therapy. View full eligibility criteria

Purpose: To compare the safety, effects (good and bad), and anti-cancer activity of ARV-471 (PF-07850327), an experimental hormone therapy, to fulvestrant (Faslodex®) hormone therapy.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) estrogen receptor positive (ER+), HER2 negative (HER2-) breast cancer who have received 1 line of treatment with a CDK inhibitor with hormone therapy and up to 1 additional line of hormone therapy for advanced disease. You must not have received chemotherapy for advanced disease. View full eligibility criteria

Purpose: To study whether a PET/CT scan with 18F FES helps your doctor choose your next treatment.

Who is this for?: Women with metastatic (stage IV) estrogen receptor positive (ER+), HER2 negative (HER2-) or HER2 low breast cancer that progressed after their first line of hormone therapy for metastatic disease. You must not have received more than 1 line of chemotherapy for metastatic disease. View full eligibility criteria

Purpose: To study the safety, effects (good and bad), and anti-cancer activity of lasofoxifene, an experimental hormone therapy, with abemaciclib (Verzenio®) CDK4/6 inhibitor.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) estrogen receptor positive (ER+), HER2 negative (HER2-) breast cancer with an ESR1 mutation. You must have received an aromatase inhibitor with palbociclib (Ibrance®) or ribociclib (Kisqali®) CDK4/6 inhibitor as your first line of hormone therapy for advanced disease. You must not have received more than 1 line of chemotherapy for advanced disease. View full eligibility criteria

Purpose: To study the safety, effects (good and bad), and anti-cancer activity of sacituzumab govitecan-hziy (Trodelvy®), a type of targeted therapy called an antibody drug conjugate (ADC), with pembrolizumab (Keytruda®), a type of immunotherapy called a PD-1 inhibitor, compared to chemotherapy with pembrolizumab (Keytruda®).

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) PD-L1 positive (PD-L1+), triple negative (ER-, PR-, HER2-) breast cancer who have not yet received treatment for advanced disease. View full eligibility criteria

Purpose: To determine the safety, side effects, dose, and anti-cancer activity of AZD8205, and antibody-drug conjugate (ADC).

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) triple negative (ER-, PR-, HER2-) breast cancer. You must not have received more than one line of therapy. View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of PRO1184, an experimental antibody drug conjugate (ADC).

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) HER2 negative (HER2-) breast cancer that expresses folate receptor alpha (FRA) who have received standard treatment. View full eligibility criteria

Purpose: To study the safety, effects (good and bad), and anti-cancer activity of single fraction stereotactic radiosurgery (SSRS) compared to fractionated stereotactic radiosurgery (FSRS).

Who is this for?: People with metastatic (stage IV) breast cancer that has spread to the brain (brain metastasis) who have received or are receiving treatment with a PD-1/PD-L1 inhibitor. You must have at least 1 brain tumor that has not been treated with radiation. View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of ASTX727, an experimental DNA methyltransferase (DNMT) inhibitor, with paclitaxel (Taxol®) chemotherapy and pembrolizumab (Keytruda®) PD-1 inhibitor.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) triple negative (ER-, PR-, HER2-) breast cancer. View full eligibility criteria

Purpose: To study the safety and anti-cancer activity of giving chemotherapy, the immunotherapy tremelimumab, and the PD-L1 inhibitor Durvalumab (Imfinzi®) together with or without a personalized synthetic long peptide (SLP) vaccine and Hiltonol® (poly-ICLC) .

Who is this for?: People with metastatic (stage IV) triple negative (ER-, PR-, HER2-) breast cancer that is PD-L1 negative and who have not yet received any treatment for metastatic disease. View full eligibility criteria

Purpose: To study the safety, effects (good and bad), and anti-cancer activity of adding radiation to metastatic breast cancer treatment.

Who is this for?: People with metastatic (stage IV) oligoprogressive breast cancer who have received at least 1 line of therapy for metastatic disease. View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of SGN-PDL1V, an experimental antibody drug conjugate (ADC).

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) triple negative (ER-, PR-, HER2-) breast cancer who have no standard treatment options available. View full eligibility criteria

Purpose: To compare the anti-cancer activity and side effects of giving stereotactic radiation therapy alone to giving it with an anti-dementia drug and whole-brain radiation therapy that avoids the hippocampus.

Who is this for?: People with metastatic (stage IV) breast cancer that has spread to their brain and who have already received stereotactic radiation therapy for brain mets. View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of BMS-986340, an experimental CCR8 inhibitor, alone or with nivolumab (Opdivo®) PD-1 inhibitor.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) breast cancer who have no standard treatment options available. You must have received at least 1 PD-1 inhibitor. View full eligibility criteria

Purpose: To collect tissue samples, blood samples, and medical information from people with breast cancer to study how cancer changes over time and during treatment.

Who is this for?: People with stage III or stage IV (metastatic) breast cancer who are receiving or planning to receive treatment. View full eligibility criteria

Purpose: To study the safety, effects (good and bad), and anti-cancer activity of sacituzumab govitecan-hziy (Trodelvy®), a type of targeted therapy called an antibody drug conjugate (ADC), compared to chemotherapy.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) triple negative (ER-, PR-, HER2-) breast cancer and have not received treatment with sacituzumab govitecan-hziy (Trodelvy®). If your cancer is PD-L1 positive, you must have previously received treatment with a PD-1/PD-L1 inhibitor. View full eligibility criteria

Purpose: To study the safety, effects (good and bad), and anti-cancer activity of giredestrant, an experimental hormone therapy, compared with fulvestrant (Faslodex®) hormone therapy in combination with a CDK4/6 inhibitor.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) estrogen receptor positive (ER+), HER2 negative (HER2-) breast cancer who not have received treatment (except for surgery or radiation) for advanced disease. View full eligibility criteria

Purpose: To compare the anti-cancer activity and side effects of stereotaxic radiation with memory-sparing, whole-brain radiation, To preserve memory, radiation will avoid the hippocampus, an area of the brain associated with memory, and be given with Memantine, a drug used to treat memory loss caused by dementia.

Who is this for?: People with metastatic (stage IV) breast cancer and 5-15 brain metastases. You must not have received prior radiation or surgery for brain metastases (mets). View full eligibility criteria

Purpose: To study the safety, best dose, side effects, and anti-cancer activity of PF-07220060/PF-07104091, a combination of experimental targeted therapies called CDK inhibitors, with hormone therapy.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) hormone receptor positive (ER+ and/or PR+), HER2 negative (HER2-) breast cancer that has progressed on at least 1 line of therapy. View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of XmAb808, an experimental bispecific antibody, with pembrolizumab (Keytruda®) PD-1 inhibitor.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) triple negative (ER-, PR-, HER2-) breast cancer who have no standard treatment options available. View full eligibility criteria

Purpose: To study where 68Ga-FAPi-46 and 68Ga-PSMA-11 accumulate in normal and cancer tissues and whether PET/CT scans with 68Ga-FAPi-46 and 68Ga-PSMA-11 can help locate cancer in the body.

Who is this for?: People with stage I, stage II, stage III, or stage IV (metastatic) breast cancer who are planning to receive surgery to remove the primary tumor and/or metastasis. View full eligibility criteria

Purpose: To study the safety, effects, and best dose of Ceralasertib when it is used alone or with the chemotherapy carboplatin or the PARP inhibitor olaparib (Lynparza®).

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) breast cancer. View full eligibility criteria

Purpose: To study the safety, best dose, and effects (good and bad) of DS-1062a.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) triple negative (ER-, PR-, HER2-) breast cancer who have no standard treatment options available. View full eligibility criteria

Purpose: To study the safety, effects (good and bad), and anti-cancer activity of NT-175, an experimental T cell receptor (TCR) immunotherapy.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) HLA positive breast cancer with the TP53 R175H mutation who have received at least 1 line of therapy. View full eligibility criteria

Purpose: To study the safety, effects (good and bad), and anti-cancer activity of BBI-355, an inhibitor of checkpoint kinase 1 (CHK1).

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) breast cancer that has advanced on all available treatments. Your tumor must show evidence of oncogene amplification. View full eligibility criteria

Purpose: To study the safety, effects (good and bad), and anti-cancer activity of GEN1047, an experimental immunotherapy.

Who is this for?: Women with advanced (some stage III) or metastatic (stage IV) breast cancer who have progressed after or during at least one prior therapy. View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of KVA12123, an experimental immunotherapy, alone or with pembrolizumab (Keytruda®) immune checkpoint inhibitor.

Who is this for?: Postmenopausal women and men with advanced (some stage III) or advanced (stage IV) breast cancer who have no standard treatment options available. View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of DB-1310, an experimental antibody drug conjugate (ADC).

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) breast cancer who have no standard treatment options available. View full eligibility criteria

Purpose: To study the safety, best dose and effects (good and bad) of NGM707 when given with and without Pembrolizumab (Keytruda®).

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) breast cancer who have no other treatment options available. View full eligibility criteria

Purpose: To study the safety, best dose, and effects (good and bad) of NGM831, an experimental immunotherapy, alone and with pembrolizumab (Keytruda®) immunotherapy.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) breast cancer that has progressed on standard treatment. View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of TNG260, an experimental targeted therapy, with pembrolizumab (Keytruda®) PD-1 inhibitor.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) breast cancer with STK11 mutations. View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of LYL797, an experimental type of immunotherapy called CAR T-cell therapy.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) triple negative (ER-, PR-, HER2-), ROR1 positive breast cancer that has progressed on standard treatment. You must not have received T-cell therapy. View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of XB002, an experimental therapy called an antibody drug conjugate (ADC).

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) hormone receptor positive (ER+ and/or PR+) or triple negative (ER-, PR-, HER2-) breast cancer that has progressed on standard treatment. View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of BMS-986449, an experimental cancer drug, with and without nivolumab (Opdivo®) PD-1 inhibitor.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) breast cancer who have no standard treatment options available. View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of XMT-1660, an experimental antibody drug conjugate (ADC).

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) breast cancer who have no standard treatment options available. View full eligibility criteria