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 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 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, 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 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 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 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, 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, anti-cancer activity, and side effects of the investigational antibody-drug conjugate ARX788.

Who is this for?: People with metastatic (stage IV) HER2 positive (HER2+) breast cancer who have already received tucatinib (Tukysa®), T-DM1 (Kadcyla®), or trastuzumab deruxtecan (Enhertu®) in the metastatic setting. 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, effects (good and bad), and anti-cancer activity of ABBV-400, 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-) or hormone receptor positive (ER+ and/or PR), HER2 negative (HER2-) breast cancer. 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 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 disitamab vedotin, an experimental antibody drug conjugate (ADC).

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) HER2 low or HER2 positive (HER2+) breast cancer who have received trastuzumab deruxtecan (Enhertu®) or sacituzumab govitecan (Trodelvy®). View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of IMP1734, an experimental PARP inhibitor.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) breast cancer who have received chemotherapy and 0-1 lines of a PARP inhibitor. You must have a BRCA1, BRCA2, PALB2, ATM, ATR, CHEK2, FANCA, MLH1, MRE11A, NBN, RAD51C, CDK12, or other homologous recombination repair (HRR) mutation. 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, best dose, and effects (good and bad) of MOMA-313, an experimental DNA polymerase theta inhibitor, alone or with olaparib (Lynparza®) PARP inhibitor.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) breast cancer with a BRCA1, BRCA2, PALB2, ATM, or CHEK2 mutation. View full eligibility criteria

Purpose: To study the safety, best dose, and effects (good and bad) of alisertib, an experimental AURKA inhibitor, with standard of care 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 who have received at least two hormone therapies including a CDK4/6 inhibitor with hormone therapy for advanced disease. You must not have received chemotherapy for advanced disease. 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 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, effects (good and bad), and anti-cancer activity of adding tucatinib (Tukysa®) tyrosine kinase inhibitor to standard of care trastuzumab (Herceptin®) or pertuzumab (Perjeta®) anti-HER2 targeted therapy or trastuzumab emtansine (Kadcyla®, T-DM1) antibody drug conjugate.

Who is this for?: People with metastatic (stage IV) HER2 positive (HER2+) breast cancer that has spread to the brain (brain metastasis) who are receiving their first line of metastatic treatment with trastuzumab (Herceptin®) or pertuzumab (Perjeta®) or second line of metastatic treatment with trastuzumab emtansine (Kadcyla®, T-DM1). You must not have received whole brain radiation therapy. 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 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 ORIC-114, an experimental x, alone or with chemotherapy.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) HER2 positive (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 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 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, 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 XMT-2056, an experimental antibody drug conjugate (ADC).

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) HER2 positive (HER2+) breast cancer or breast cancer with a HER2 mutation who have received standard treatment. 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 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 study the safety, effects (good and bad), and anti-cancer activity of datopotamab deruxtecan (Dato-DXd), an experimental antibody drug conjugate (ADC), with or without durvalumab immunotherapy compared to standard of care chemotherapy with pembrolizumab immunotherapy.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) triple negative (ER-, PR-, HER2-), PD-L1 positive 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 AB598, an experimental CD39 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, 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 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, 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, 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, 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 study the safety, effects (good and bad), and anti-cancer activity of DB-1303/BNT323, an experimental antibody drug conjugate (ADC).

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) hormone receptor positive (ER+ or ER low and/or PR+ or PR low), HER2 low breast cancer who have received 1-2 lines of therapy for advanced disease. You must not have received chemotherapy for advanced disease or any anti-HER2 targeted therapy. 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 study the safety, effects (good and bad), and anti-cancer activity of inavolisib, an experimental PI3K inhibitor, with Phesgo anti-HER2 targeted therapy.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) HER2 positive (HER2+) breast cancer with a PIK3CA mutation who have not received treatment for advanced disease (except for hormone therapy if HR+). View full eligibility criteria

Purpose: To study the safety, effects (good and bad), and anti-cancer activity of sacituzumab tirumotecan, an experimental antibody drug conjugate (ADC), alone or with pembrolizumab (Keytruda®) immunotherapy compared to standard of care chemotherapy.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) triple negative (ER-, PR-, HER2-) breast cancer who have not yet received treatment for advanced disease. Your cancer must express PD-L1 at a combined positive score (CPS) of less than 10. View full eligibility criteria

Purpose: To study the safety, effects (good and bad), and anti-cancer activity of belzutifan (MK-6482), an experimental targeted therapy, with hormone therapy compared to standard of care targeted therapy and 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 at least 1 line of hormone therapy for advanced disease. You must not have received chemotherapy or a PARP inhibitor for advanced disease. View full eligibility criteria

Purpose: To study the safety, effects (good and bad), and anti-cancer activity of PF-07220060, an experimental CDK4 inhibitor, with letrozole (Femara®) hormone therapy compared to standard of care treatment.

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

Purpose: To study the safety, best dose, and effects (good and bad) of RLY-2608 alone and in combination 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. View full eligibility criteria

Purpose: To study the safety, effects (good and bad), and anti-cancer activity of the Bria-IMT regimen, an experimental cell therapy, alone and with retifanlimab (Zynyz®) 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, effects (good and bad), and anti-cancer activity of eniluracil (PCS6422), an experimental DPD inhibitor, with capecitabine (Xeloda®) compared to capecitabine (Xeloda®) alone.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) HER2 negative (HER2-) breast cancer who have received chemotherapy for advanced disease. 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, side-effects, anti-cancer activity, and best dose of the antibody-drug conjugate SGN-B6A.

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 PMD-026, an experimental targeted therapy, with fulvestrant (Faslodex®) 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-), RSK2 positive (RSK2+) breast cancer who have received a CDK4/6 inhibitor with hormone therapy for advanced disease. View full eligibility criteria

Purpose: To study the safety, effects (good and bad), and anti-cancer activity of IAM1363, an experimental anti-HER2 targeted therapy.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) HER2 positive (HER2+) or HER2 mutated breast cancer who have received at least 1 line of therapy for advanced disease. View full eligibility criteria

Purpose: To study the safety, best dose, and effects (good and bad) of ALTA2618, an experimental AKT1 E17K inhibitor.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) breast cancer with AKT1 E17K mutations who have no standard treatment options available. You must not have a KRAS, NRAS, HRAS, or BRAF mutation. View full eligibility criteria

Purpose: To study the safety, best dose, and effects (good and bad) of BBO-10203, an experimental targeted therapy, with trastuzumab (Herceptin®) anti-HER2 targeted therapy.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) HER2 positive (HER2+) breast cancer who have received at least 2 lines of anti-HER2 targeted therapy or hormone receptor positive (ER+ and/or PR+), HER2 negative (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 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, best dose, effects (good and bad), and anti-cancer activity of ribociclib (Kisqali®), trastuzumab (Herceptin®), and tucatinib (Tukysa®) targeted therapies alone or with fulvestrant (Faslodex®) hormone therapy.

Who is this for?: People with stage II, stage III, or stage IV (metastatic) HER2 positive (HER2+) or HER2 low breast cancer. If you have stage II or some stage III breast cancer, you must not have received treatment or surgery. If you have advanced (some stage III) or metastatic (stage IV) breast cancer, you must have received at least 1 line of anti-HER2 targeted therapy for metastatic disease. View full eligibility criteria

Purpose: To compare the safety, effects (good and bad), and anti-cancer activity of saruparib, an experimental PARP1 inhibitor, with camizestrant, an experimental hormone therapy, to standard of care CDK4/6 inhibitor 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-) or HER2 low (IHC 1+ or IHC 2+/ISH-) breast cancer with BRCA1, BRCA2, or PALB2 mutations. View full eligibility criteria

Purpose: To study the safety, anti-cancer activity and effects (good and bad) of SNS-101, an experimental immunotherapy, with or without cemiplimab, an experimental immunotherapy, in people with advanced breast cancer.

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, 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

Purpose: To study the safety, effects (good and bad), and anti-cancer activity of afuresertib (LAE002), an experimental AKT inhibitor, with fulvestrant (Faslodex®) hormone therapy.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) hormone positive (ER+ and/or PR+), HER2 negative (HER2-) breast cancer with PIK3CA, AKT1, or PTEN mutations that has progressed after 1 -2 lines of therapy. View full eligibility criteria

Purpose: To determine the safety and best dose of CX-5461, an experimental targeted therapy.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) breast cancer who have a BRCA2 or PALB2 germline (genetic) mutation. View full eligibility criteria

Purpose: To study the safety, effects (good and bad), and anti-cancer activity of RYZ101, an experimental radioactive drug, with pembrolizumab (Keytruda®) immunotherapy.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) estrogen receptor (ER+) or ER low, HER2 negative (HER2-) or HER2 low breast cancer that expresses somatostatin receptors (SSTRs) 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 OKI-219, an experimental PI3Kα inhibitor, with fulvestrant (Faslodex®) hormone therapy or trastuzumab (Herceptin®) anti-HER2 targeted 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-) or HER2 positive (HER2+) breast cancer with a PI3KαH1047R mutation. View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of RGT-419B, an experimental type of targeted therapy called a CDK 2/4/6 inhibitor, alone and 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 after treatment with a CDK 4/6 inhibitor and hormone therapy. You must not have received more than 1 line of chemotherapy. View full eligibility criteria

Purpose: To study the safety, best dose, and effects (good and bad) of ADRX-0706, an experimental antibody drug conjugate.

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. You must have received at least 1 line of therapy for advanced disease. 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 best dose, safety, and anti-cancer activity of AMXI-5001--an experimental PARP 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, and effects (good and bad) of MBQ-167, an experimental targeted therapy.

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 STX-001, an experimental mRNA drug, 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 received chemotherapy and pembrolizumab (Keytruda®) or dostarlimab (Jemperli®) for advanced disease. You must have at least 1 tumor that has not received radiation. View full eligibility criteria

Purpose: To study the safety, best dose, and effects (good and bad) of TransCon IL-2 β/γ, an experimental immunotherapy, alone or with other anti-cancer therapies.

Who is this for?: People with metastatic (stage IV) HER2 positive (HER2+) breast cancer who have received at least 2 lines of therapy for metastatic disease. View full eligibility criteria

Purpose: To find a dose of zongertinib, an experimental targeted therapy, that people with advanced HER2+ breast cancer can tolerate best when taken with trastuzumab deruxtecan (T-DXd, Enhertu®) or trastuzumab emtansine (T-DM1, Kadcyla®) antibody drug conjugates.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) HER2 positive (HER2+) breast cancer. View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of ivermectin (Stromectol®), an experimental anti-cancer drug, with balstilimab, an experimental immunotherapy.

Who is this for?: People with metastatic (stage IV) triple negative (ER- or ER low, PR- or PR low, HER2-) breast cancer who have received 1-2 lines of chemotherapy or antibody-drug conjugate (ADC) for metastatic disease. You must not have received treatment with pembrolizumab (Keytruda®) or dostarlimab (Jemperli®) for metastatic disease. View full eligibility criteria

Purpose: To evaluate the safety and effects (good and bad) of using Minnelide™ along with the chemotherapy protein-bound paclitaxel (Abraxane®).

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

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of LCB84, an experimental antibody drug conjugate (ADC), with or without a PD-1 inhibitor.

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

Purpose: To study the safety, anti-cancer activity and other effects (good and bad) of the experimental targeted therapy PF-07220060.

Who is this for?: People with advanced (some stage III) or metastatic (stage IV) hormone positive (ER+ and/or PR+) breast cancer who have no standard of care therapies available. View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of elacestrant, an experimental hormone therapy, alone or with abemaciclib (Verzenio®) CDK 4/6 inhibitor.

Who is this for?: People with metastatic (stage IV) estrogen receptor positive (ER+), HER2 negative (HER2-) or HER2 low breast cancer that has spread to the brain (brain metastasis) who have received at least 1 hormone therapy, up to 2 chemotherapies, and up to 2 CDK 4/6 inhibitors for metastatic disease. View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of DB-1303, an experimental antibody-drug conjugate.

Who is this for?: People who have advanced (some stage III) or metastatic (stage IV) HER2 positive (HER2+) or HER2 low breast cancer who have progressed on standard treatment and have not received treatment with trastuzumab deruxtecan (Enhertu®). View full eligibility criteria

Purpose: To study the safety, best dose, effects (good and bad), and anti-cancer activity of ONM-501, an experimental STING inhibitor, alone and with cemiplimab (Libtayo®) 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 ZEN003694, an experimental BET bromodomain Inhibitor, with abemaciclib (Verzenio®) CDK4/6 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, effects (good and bad), and anti-cancer activity of a different dose and schedule of sacituzumab govitecan (Trodelvy), an 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 yet received treatment for advanced disease. Your tumors must be PD-L1 negative, or you must have received treatment with pembrolizumab (Keytruda) or atezolizumab (Tecentriq®) immunotherapy for early stage disease. You must not have received treatment with trastuzumab deruxtecan (Enhertu®) or sacituzumab govitecan (Trodelvy®) ADCs or irinotecan (Camptosar®) chemotherapy. View full eligibility criteria