{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?sponsor=Atara+Biotherapeutics",
    "query": {
      "sponsor": "Atara Biotherapeutics"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 9,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-10-01T18:28:40.827Z",
  "attribution": "Data derived from public ClinicalTrials.gov records. The official record at https://clinicaltrials.gov/ remains the source of truth for current availability, contacts, and full study details.",
  "notes": [
    "This endpoint exposes only public summary fields — no participant contact emails, phone numbers, or scraped investigator contact details.",
    "For contact information and full protocol detail, follow each trial's `official_url` to the ClinicalTrials.gov record.",
    "This API is a navigational aid. It does not provide medical advice, eligibility determinations, or compensation guarantees."
  ],
  "trials": [
    {
      "nct_id": "NCT00002663",
      "title": "Biological Therapy in Treating Patients at High-Risk or With Lymphoma, Lymphoproliferative Disease, or Malignancies",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "EBV-induced Lymphomas",
        "EBV-associated Malignancies",
        "Transplant Patients With EBV Viremia at High Risk of Developing a Recurrent EBV Lymphoma"
      ],
      "interventions": [
        {
          "name": "Epstein-Barr virus-specific cytotoxic T lymphocytes (EBV-CTLs)",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Atara Biotherapeutics",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 58,
      "start_date": "1995-03",
      "completion_date": "2019-07",
      "has_results": true,
      "last_update_posted_date": "2023-02-13",
      "last_synced_at": "2026-10-01T18:28:40.827Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00002663"
    },
    {
      "nct_id": "NCT03283826",
      "title": "Phase 1/2 Study to Evaluate the Safety and Efficacy of ATA188 in Subjects With Progressive Multiple Sclerosis",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Primary Progressive Multiple Sclerosis",
        "Secondary Progressive Multiple Sclerosis"
      ],
      "interventions": [
        {
          "name": "ATA188",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "DRUG"
      ],
      "sponsor": "Atara Biotherapeutics",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "18 Years to 60 Years"
      },
      "enrollment_count": 134,
      "start_date": "2017-10-19",
      "completion_date": "2024-01-17",
      "has_results": false,
      "last_update_posted_date": "2024-02-23",
      "last_synced_at": "2026-10-01T18:28:40.827Z",
      "location_count": 25,
      "location_summary": "La Jolla, California • Los Angeles, California • Palo Alto, California + 22 more",
      "locations": [
        {
          "city": "La Jolla",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Palo Alto",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03283826"
    },
    {
      "nct_id": "NCT06256484",
      "title": "A Study to Evaluate the Safety and Preliminary Efficacy of ATA3219 in Participants With Relapsed/Refractory B-cell Non-Hodgkin Lymphoma",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Relapsed/Refractory B-cell Non-Hodgkin Lymphoma"
      ],
      "interventions": [
        {
          "name": "ATA3219",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Atara Biotherapeutics",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "120 Years",
        "sex": "ALL",
        "summary": "18 Years to 120 Years"
      },
      "enrollment_count": 1,
      "start_date": "2024-09-06",
      "completion_date": "2025-03-30",
      "has_results": false,
      "last_update_posted_date": "2026-03-11",
      "last_synced_at": "2026-10-01T18:28:40.827Z",
      "location_count": 4,
      "location_summary": "Orlando, Florida • Louisville, Kentucky • Philadelphia, Pennsylvania + 1 more",
      "locations": [
        {
          "city": "Orlando",
          "state": "Florida"
        },
        {
          "city": "Louisville",
          "state": "Kentucky"
        },
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        },
        {
          "city": "Charlottesville",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06256484"
    },
    {
      "nct_id": "NCT04577326",
      "title": "Mesothelin-targeted CAR T-cell Therapy in Patients With Mesothelioma",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Malignant Pleural Mesothelioma (MPM)"
      ],
      "interventions": [
        {
          "name": "cyclophosphamide",
          "type": "DRUG"
        },
        {
          "name": "CAR T cells",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "DRUG",
        "BIOLOGICAL"
      ],
      "sponsor": "Memorial Sloan Kettering Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 14,
      "start_date": "2020-09-30",
      "completion_date": "2026-09-30",
      "has_results": false,
      "last_update_posted_date": "2026-07-27",
      "last_synced_at": "2026-10-01T18:28:40.827Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04577326"
    },
    {
      "nct_id": "NCT03769467",
      "title": "Tabelecleucel in Combination With Pembrolizumab in Subjects With Epstein-Barr Virus-associated Nasopharyngeal Carcinoma (EBV+ NPC)",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Nasopharyngeal Carcinoma",
        "Nasopharyngeal Neoplasms",
        "Epstein-Barr Virus Infections",
        "Epstein-Barr Viraemia",
        "Epstein-Barr Virus-associated Nasopharyngeal Carcinoma (EBV+ NPC)"
      ],
      "interventions": [
        {
          "name": "Tabelecleucel",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Pembrolizumab",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Atara Biotherapeutics",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "12 Years and older"
      },
      "enrollment_count": 12,
      "start_date": "2019-02-19",
      "completion_date": "2021-08-19",
      "has_results": true,
      "last_update_posted_date": "2024-11-14",
      "last_synced_at": "2026-10-01T18:28:40.827Z",
      "location_count": 7,
      "location_summary": "Duarte, California • Palo Alto, California • Boston, Massachusetts + 3 more",
      "locations": [
        {
          "city": "Duarte",
          "state": "California"
        },
        {
          "city": "Palo Alto",
          "state": "California"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Morristown",
          "state": "New Jersey"
        },
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03769467"
    },
    {
      "nct_id": "NCT06429800",
      "title": "A Study to Evaluate the Safety and Preliminary Efficacy of ATA3219 in Participants With Systemic Lupus Erythematosus",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Lupus Nephritis",
        "Systemic Lupus Erythematosus"
      ],
      "interventions": [
        {
          "name": "ATA3219",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Atara Biotherapeutics",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "55 Years",
        "sex": "ALL",
        "summary": "18 Years to 55 Years"
      },
      "enrollment_count": 0,
      "start_date": "2025-04-16",
      "completion_date": "2025-04-16",
      "has_results": false,
      "last_update_posted_date": "2025-04-24",
      "last_synced_at": "2026-10-01T18:28:40.827Z",
      "location_count": 1,
      "location_summary": "Thousand Oaks, California",
      "locations": [
        {
          "city": "Thousand Oaks",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06429800"
    },
    {
      "nct_id": "NCT01498484",
      "title": "Therapeutic Effects of Epstein-Barr Virus Immune T-Lymphocytes Derived From a Normal HLA-Compatible Or Partially-Matched Third-Party Donor in the Treatment of EBV Lymphoproliferative Disorders and EBV-Associated Malignancies",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "EBV-induced Lymphomas",
        "EBV-associated Malignancies",
        "Transplant Patients With EBV Viremia at High Risk for Developing a Recurrent EBV Lymphoma"
      ],
      "interventions": [
        {
          "name": "EBV-specific T cells (EBV-CTLs)",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Atara Biotherapeutics",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 87,
      "start_date": "2011-12",
      "completion_date": "2019-07",
      "has_results": true,
      "last_update_posted_date": "2022-10-21",
      "last_synced_at": "2026-10-01T18:28:40.827Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01498484"
    },
    {
      "nct_id": "NCT01646645",
      "title": "Primary Transplant Donor Derived CMVpp65 Specific T-cells for The Treatment of CMV Infection or Persistent CMV Viremia After Allogeneic Hematopoietic Stem Cell Transplantation",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Cytomegalovirus"
      ],
      "interventions": [
        {
          "name": "CMV-pp65 CTLs",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Memorial Sloan Kettering Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 58,
      "start_date": "2012-07-13",
      "completion_date": "2019-12-11",
      "has_results": true,
      "last_update_posted_date": "2020-12-16",
      "last_synced_at": "2026-10-01T18:28:40.827Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01646645"
    },
    {
      "nct_id": "NCT00620633",
      "title": "Dose Escalation Trial of WT1-Sensitized T Cells for Residual or Relapsed Leukemia After Allogeneic Hematopoietic Progenitor Cell Transplantation",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Leukemia",
        "Myelodysplastic Syndrome"
      ],
      "interventions": [
        {
          "name": "WT1-sensitized T cells",
          "type": "BIOLOGICAL"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL"
      ],
      "sponsor": "Memorial Sloan Kettering Cancer Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 22,
      "start_date": "2008-02-08",
      "completion_date": "2021-02-26",
      "has_results": false,
      "last_update_posted_date": "2021-03-02",
      "last_synced_at": "2026-10-01T18:28:40.827Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00620633"
    }
  ]
}