Radiation Therapy Oncology Group

Closed portfolio snapshot

According to ClinicalTrials.gov-derived indexes, Radiation Therapy Oncology Group sits in the top decile of US sponsors by registered trial count (#196 of 15,742 sponsors by registered trial count).

144 total trials none currently recruiting 131 completed top decile by trial count

Radiation Therapy Oncology Group: 144 sponsored US clinical trials, none currently recruiting.

Radiation Therapy Oncology Group sponsors 144 registered US clinical trials on ClinicalTrials.gov, none currently recruiting, and 131 completed. 55 of these trials are in Phase 3-4 (later-stage) and 82 in Phase 1-2 (earlier-stage). The most-studied condition in this pipeline is Prostate Cancer, with 10 trials.

Top-decile sponsor footprint

Radiation Therapy Oncology Group ranks in the top decile of sponsors by registered trial count (#196 of 15,742 sponsors by registered trial count). Volume at this scale usually reflects a long institutional pipeline, read phase tilt and therapeutic areas below before treating it as current-year activity.

Trial completion reliability score

C 77/100

131 of 138 decided trials (Completed vs. Terminated on ClinicalTrials.gov) reached their planned completion (94.9%), vs. national p10 68.4% / p90 100% among 1,234 sponsors with at least 10 decided trials. Still-open trials (Recruiting, Active-not-recruiting, Not-yet-recruiting) are excluded since they have not reached an outcome yet.

Indexed trials (enrollment closed)

144 total, page 2 of 3

COMPLETED Phase 3

Radiation Therapy in Treating Patients With Stage II Prostate Cancer

NCT00331773
COMPLETED Phase 2

Intensity-Modulated Radiation Therapy to the Pelvis With or Without Chemotherapy in Treating Patients With Endometrial Cancer or Cervical Cancer That Has Been Removed By Surgery

NCT00331760
COMPLETED Phase 3

Zoledronate in Preventing Osteoporosis and Bone Fractures in Patients With Locally Advanced Nonmetastatic Prostate Cancer Undergoing Radiation Therapy and Hormone Therapy

NCT00329797
COMPLETED NA

Positron Emission Tomography Scan and CT Scan in Planning Radiation Therapy for Patients With Stage II or Stage III Non-Small Cell Lung Cancer

NCT00310219
COMPLETED Phase 3

Radiation Therapy (RT) and Temozolomide (TMZ) in Treating Patients With Newly Diagnosed Glioblastoma or Gliosarcoma

NCT00304031
COMPLETED Phase 3

Hormone Therapy and Radiation Therapy or Hormone Therapy and Radiation Therapy Followed by Docetaxel and Prednisone in Treating Patients With Localized Prostate Cancer

NCT00288080
COMPLETED Phase 1

Radiation Therapy in Treating Patients With Liver Metastases

NCT00255814
COMPLETED Phase 3

Radiation Therapy and Cisplatin With or Without Cetuximab in Treating Patients With Stage III or Stage IV Head and Neck Cancer

NCT00265941
COMPLETED

Collecting and Storing Tissue Samples From Patients With Head and Neck Cancer

NCT00898300
TERMINATED Phase 3

Combination Chemotherapy With or Without Radiation Therapy in Treating Patients With Recurrent Head and Neck Cancer That Cannot Be Removed By Surgery

NCT00113399
TERMINATED Phase 3

Cisplatin and Docetaxel With or Without Radiation Therapy in Treating Patients Who Are Undergoing Surgery for Newly Diagnosed Stage III Non-Small Cell Lung Cancer

NCT00113386
COMPLETED Phase 2

Temozolomide and Radiation Therapy in Treating Patients With Gliomas

NCT00114140
COMPLETED Phase 2

Radiation Therapy, Temozolomide, and Irinotecan in Treating Patients With Newly Diagnosed Glioblastoma Multiforme

NCT00099125
COMPLETED Phase 2

Paclitaxel, Carboplatin, and Radiation Therapy in Treating Patients Who Are Undergoing Surgery for Stage III Non-Small Cell Lung Cancer

NCT00096226
COMPLETED Phase 2

Radiation Therapy in Treating Patients With Stage II or Stage III Prostate Cancer

NCT00091390
COMPLETED Phase 2

Stereotactic Body Radiation Therapy in Treating Patients With Inoperable Stage I or Stage II Non-Small Cell Lung Cancer

NCT00087438
COMPLETED Phase 2

Adjuvant Cetuximab and Chemoradiotherapy Using Either Cisplatin or Docetaxel in Treating Patients With Resected Stage III or Stage IV Squamous Cell Carcinoma or Lymphoepithelioma of the Head and Neck

NCT00084318
COMPLETED Phase 2

Cetuximab, Paclitaxel, Carboplatin, and Radiation Therapy in Treating Patients With Unresectable Stage IIIA or Stage IIIB Non-Small Cell Lung Cancer

NCT00081302
COMPLETED Phase 2

Neoadjuvant Chemoradiotherapy and Adjuvant Chemotherapy in Treating Patients Who Are Undergoing Surgical Resection for Locally Advanced Rectal Cancer

NCT00081289
COMPLETED Phase 3

Octreotide in Preventing or Reducing Diarrhea in Patients Receiving Chemoradiotherapy for Anal or Rectal Cancer

NCT00075868
COMPLETED Phase 2

Combination Chemotherapy Followed By Chemoradiotherapy, With or Without Surgery, in Treating Patients With Resectable Locally Advanced Cancer of the Esophagus or Gastroesophageal Junction

NCT00069953
COMPLETED Phase 2

Salivary Gland Surgery Before Radiation Therapy in Preventing Radiation-Caused Xerostomia in Patients With Head and Neck Cancer

NCT00068237
COMPLETED Phase 1

3-Dimensional Conformal Radiation Therapy In Treating Women With Stage I or Stage II Breast Cancer Previously Treated With Lumpectomy and Axillary Node Dissection

NCT00068263
COMPLETED Phase 1

Combination Chemotherapy, Monoclonal Antibody, and Radiation Therapy in Treating Patients With Primary Central Nervous System Lymphoma

NCT00068250
COMPLETED Phase 3

Interstitial Brachytherapy With or Without External-Beam Radiation Therapy in Treating Patients With Prostate Cancer

NCT00063882
COMPLETED Phase 2

Cisplatin, Etoposide, and Radiation Therapy in Treating Patients With Limited-Stage Small Cell Lung Cancer

NCT00066222
TERMINATED Phase 2

Captopril in Treating Patients With Non-Small Cell Lung Cancer or Limited-Stage Small Cell Lung Cancer That Has Been Previously Treated With Radiation Therapy With or Without Chemotherapy

NCT00077064
COMPLETED Phase 1

Chemotherapy Combined With Radiation Therapy in Treating Patients With Limited-Stage Small Cell Lung Cancer

NCT00059761
COMPLETED Phase 2

Brain Irradiation in Treating Patients With Limited-Stage Small Cell Lung Cancer

NCT00057746
COMPLETED Phase 2

Radiation Therapy With or Without Chemotherapy in Reducing Mouth Dryness in Patients With Nasopharyngeal Cancer

NCT00057785
COMPLETED NA

Sildenafil in Treating Erectile Dysfunction in Patients With Prostate Cancer

NCT00057759
COMPLETED Phase 3

Comparison of Nutritional Supplements in Preventing Weight Loss in Patients With Cancer

NCT00053053
COMPLETED Phase 2

Combination Chemotherapy and Radiation Therapy With/Without Surgery In Patients With Stage II/III Bladder Cancer

NCT00055601
COMPLETED Phase 3

Hormone Therapy Plus Chemotherapy in Treating Patients With Prostate Cancer

NCT00030654
COMPLETED Phase 3

Radiation Therapy in Preventing Central Nervous System (CNS) Metastases in Patients With Non-Small Cell Lung Cancer

NCT00048997
COMPLETED Phase 3

Chemotherapy and Radiation Therapy With or Without Surgery in Treating Patients With Head and Neck Cancer

NCT00047008
COMPLETED Phase 1

Celecoxib and Radiation Therapy in Treating Patients With Locally Advanced Non-Small Cell Lung Cancer

NCT00046839
COMPLETED Phase 2

Temozolomide Plus Radiation Therapy in Treating Patients With Newly Diagnosed Anaplastic Oligodendrogliomas or Mixed Anaplastic Oligoastrocytomas

NCT00033280
COMPLETED Phase 2

Melatonin and Radiation Therapy in Treating Patients With Brain Metastases

NCT00031967
COMPLETED Phase 3

Radiation Therapy in Treating Patients With Stage II Prostate Cancer

NCT00033631
COMPLETED Phase 1

Radiation Therapy With or Without SU5416 in Treating Patients With Soft Tissue Sarcoma

NCT00023725
COMPLETED Phase 1

Radiation Therapy and Cisplatin With or Without Amifostine for Patients With Stage IIIB or IVA Cervical Cancer

NCT00012012
COMPLETED Phase 1

Radiation Therapy Plus Celecoxib, Fluorouracil, and Cisplatin in Patients With Locally Advanced Cervical Cancer

NCT00023660
COMPLETED Phase 1

Chemotherapy, SU5416, Radiation Therapy, and Surgery in Treating Patients With Soft Tissue Sarcoma

NCT00023738
COMPLETED Phase 1

Radiation Therapy Combined With Paclitaxel and Carboplatin in Treating Patients With Stage III Non-Small Cell Lung Cancer

NCT00023673
TERMINATED Phase 2

Radiation Therapy Followed by Bleomycin in Treating Adult Patients With Newly Diagnosed Supratentorial Glioblastoma Multiforme

NCT00006916
COMPLETED Phase 1

Gemcitabine, Carboplatin or Paclitaxel Plus Radiation Therapy in Treating Patients With Stage IIIA or IIIB Non-Small Cell Lung Cancer

NCT00016315
COMPLETED Phase 2

Chemotherapy and Radiation Therapy With or Without Fluorouracil in Treating Patients With Cancer of the Stomach Who Have Undergone Surgery

NCT00011960
COMPLETED Phase 2

Combination Chemotherapy Plus Radiation Therapy With or Without Fluorouracil in Treating Patients With Cancer of the Esophagus or Stomach

NCT00009880
COMPLETED Phase 2

Chemotherapy and Radiation Therapy Following Surgery in Treating Patients With Head and Neck Cancer

NCT00011999
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Phase Distribution

PhaseTrial count
Phase 1 22
Phase 2 60
Phase 3 55

Therapeutic Areas

Prostate Cancer 10
Head and Neck Cancer 7
Lung Cancer 5
Brain and Central Nervous System Tumors 3
Cognitive/Functional Effects 2
Radiation Toxicity 2
Metastatic Cancer 2
Breast Cancer 2
Skin Reactions Secondary to Radiation Therapy 1
Adult Oligodendroglioma 1

How the Radiation Therapy Oncology Group archive is shaped

144 indexed studies, none listed as recruiting (0% open); 131 completed (91%).

Phase mix: 55 late (III/IV) vs 82 early (I/II) (balanced across stages).

Top condition: Prostate Cancer (10 trials), 9 others listed.

How to read a closed sponsor archive

When recruiting_count is zero, the indexed set is completed or otherwise not open. Phase tilt still describes where archived studies sat on the investigational pathway. Re-check ClinicalTrials.gov before acting.

Radiation Therapy Oncology Group: archived-pipeline peers nationwide

Peers matched on 144 indexed studies with no current recruiting: volume and archive shape, not condition overlap.

Radiation Therapy Oncology Group sits at or above the median trial volume and at or above the median recruiting share among these 9 nationwide peers -- the two do not always move together. Source: ClinicalTrials.gov (2026-08-08 snapshot). 2×2 strategic matrix plotting 9 entities by Total trials (X) and Recruiting share (Y), with a crosshair dividing the plot into four quadrants. Higher volume & more openFocused & more openHigher volume, mostly closedSmaller & mostly closed 050100150200 0%5%10%15% Total trials Recruiting share Radiation Therapy Oncology GroupForest LaboratoriesNational Institute of Environmental Health Sciences (NIEHS)HealthPartners InstituteMylan Pharmaceuticals10xBio22nd Century Group23andMe3-C Institute for Social Development
Radiation Therapy Oncology Group sits at or above the median trial volume and at or above the median recruiting share among these 9 nationwide peers -- the two do not always move together. Source: ClinicalTrials.gov (2026-08-08 snapshot).

Radiation Therapy Oncology Group sits at or above the median trial volume and at or above the median recruiting share among these 9 nationwide peers -- the two do not always move together.

Sponsors near 144 archived trials

Sponsors with similar archive density (± trial count)

Related

Read our methodology - how this data is sourced, computed, and verified.

What to do with this Radiation Therapy Oncology Group page

144 registered trials is a research-attention snapshot, not an endorsement of Radiation Therapy Oncology Group or any single study.

  • None of Radiation Therapy Oncology Group's trials are currently recruiting in this registry; that can change as new trials post, or check the broader research index. Browse research indexes
  • Prostate Cancer is the condition Radiation Therapy Oncology Group studies most, compare against other sponsors active in the same condition before evaluating a specific study. See Prostate Cancer trials
  • Bring the specific trial ID (NCT number) to your own doctor before enrolling, this page is a directory, not medical guidance. Read the trial-finding guide

Trial and recruiting counts reflect ClinicalTrials.gov registry status as of the data vintage above; individual trial eligibility and enrollment status can change.

Every figure on PlainTrial is rendered directly from the ClinicalTrials.gov registry, no number is typed in by an editor. Radiation Therapy Oncology Group pipeline card: 144 registered trials from official public datasets. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error.