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 3 of 3

COMPLETED Phase 2

Vaccine Therapy Plus Radiation Therapy in Treating Patients With Non-small Cell Lung Cancer That Has Been Completely Removed in Surgery

NCT00006470

COMPLETED Phase 2

Radiation Therapy Followed by Carmustine in Treating Patients Who Have Supratentorial Glioblastoma Multiforme

NCT00006386

COMPLETED Phase 2

Radiation Therapy Plus Chemotherapy Followed by Surgery in Treating Patients With Locally Advanced Cancer of the Rectum

NCT00006366

COMPLETED Phase 1

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

NCT00006360

COMPLETED Phase 2

Radiation Therapy and Tamoxifen in Treating Adults With Newly Diagnosed Supratentorial Glioblastoma Multiforme

NCT00006388

COMPLETED Phase 2

External-Beam Radiation Therapy Plus Implanted Radiation Therapy in Treating Patients With Prostate Cancer

NCT00006365

COMPLETED NA

Evaluation of Memory Skills in Patients Receiving Radiation Therapy for Brain Metastases

NCT00007007

COMPLETED Phase 3

Biafine Cream to Reduce Side Effects of Radiation Therapy in Patients Receiving Treatment for Advanced Head and Neck Cancer

NCT00006481

COMPLETED Phase 3

Sargramostim in Decreasing Mucositis in Patients Receiving Radiation Therapy for Head and Neck Cancer

NCT00008398

COMPLETED Phase 3

Comparison of Radiation Therapy With or Without Combination Chemotherapy Following Surgery in Treating Patients With Stage I or Stage II Endometrial Cancer

NCT00006027

COMPLETED Phase 3

Radiation Therapy Combined With Chemotherapy in Treating Patients With Anaplastic Astrocytoma or Mixed Gliomas

NCT00004259

COMPLETED Phase 3

Radiation Therapy With or Without Epoetin Alfa in Treating Anemic Patients With Head and Neck Cancer

NCT00004917

COMPLETED Phase 2

Radiation Therapy and Cisplatin in Treating Patients With Advanced Head and Neck Cancer

NCT00005088

COMPLETED Phase 2

Paclitaxel, Cisplatin, and Filgrastim Combined With Radiation Therapy in Treating Patients With Locally Recurrent Head and Neck Cancer

NCT00005087

COMPLETED Phase 3

Hormone Therapy and Radiation Therapy in Treating Patients With Prostate Cancer

NCT00005044

COMPLETED Phase 3

Hormone Therapy Plus Radiation Therapy With or Without Combination Chemotherapy in Treating Patients With Prostate Cancer

NCT00004054

COMPLETED Phase 3

Radiation Therapy With or Without Optional Tamoxifen in Treating Women With Ductal Carcinoma in Situ

NCT00003857

COMPLETED Phase 2

Chemotherapy and Radiation Therapy in Treating Patients With Stomach Cancer

NCT00003862

COMPLETED Phase 1

Radiation Therapy and Combination Chemotherapy in Treating Patients With Stage II or Stage III Bladder Cancer

NCT00003930

COMPLETED Phase 3

Pentosan Polysulfate in Treating Patients With Gastrointestinal Disturbance Caused by Radiation Therapy

NCT00003825

COMPLETED Phase 2

Radiation Therapy Plus Paclitaxel in Treating Patients With Nonmetastatic, Unresectable Pancreatic Cancer

NCT00003591

COMPLETED Phase 3

Chemotherapy Plus Radiation Therapy in Treating Patients With Stage II or Stage III Anal Cancer

NCT00003596

COMPLETED Phase 1

Computer Planned Radiation Therapy Plus Chemotherapy in Treating Patients With Glioblastoma Multiforme

NCT00003417

COMPLETED Phase 3

Amifostine in Treating Patients With Stage II or Stage III Non-small Cell Lung Cancer

NCT00003313

COMPLETED Phase 2

Brachytherapy in Treating Patients With Prostate Cancer

NCT00003312

COMPLETED Phase 3

Fluorouracil, Gemcitabine, and Radiation Therapy in Treating Patients With Cancer of the Pancreas

NCT00003216

COMPLETED Phase 3

Pilocarpine in Preventing Mucositis and Dry Mouth in Patients Receiving Radiation Therapy for Head and Neck Cancer

NCT00003139

COMPLETED Phase 1

Radiation Therapy Plus Combination Chemotherapy in Treating Patients With Small Cell Lung Cancer

NCT00005022

COMPLETED Phase 3

Radiation Therapy in Treating Patients With Bone Metastases From Breast or Prostate Cancer

NCT00003162

COMPLETED Phase 3

Radiation Therapy With or Without Bicalutamide for Recurrent pT3N0 Prostate Cancer After Radical Prostatectomy

NCT00002874

COMPLETED Phase 2

Cisplatin and Radiation Therapy in Treating Patients With Stage IV Cancer of the Head and Neck

NCT00002932

COMPLETED Phase 1

Radiation Therapy in Treating Women With Stage I or Stage II Breast Cancer

NCT00002873

COMPLETED Phase 2

Chemotherapy Plus Radiation Therapy Followed by Surgery in Treating Patients With Soft Tissue Sarcoma

NCT00002791

COMPLETED Phase 3

Radiation Therapy in Treating Patients With Stage II Cancer of the Vocal Cord

NCT00002727

COMPLETED Phase 3

Radiation Therapy With or Without Radiosurgery in Treating Patients With Brain Metastases

NCT00002708

COMPLETED Phase 3

Radiation Therapy With or Without Chemotherapy in Treating Patients With Head and Neck Cancer That Has Been Removed During Surgery

NCT00002670

COMPLETED Phase 1

Radiation Therapy in Treating Patients With Non-small Cell Lung Cancer

NCT00002577

COMPLETED Phase 3

Combination Chemotherapy Plus Radiation Therapy in Treating Patients With Cancer of the Esophagus

NCT00002631

COMPLETED Phase 3

Radiation Therapy With or Without Antiandrogen Therapy in Treating Patients With Stage I or Stage II Prostate Cancer

NCT00002597

COMPLETED Phase 3

Radiation Therapy With or Without Chemotherapy in Treating Patients With Anaplastic Oligodendroglioma

NCT00002569

COMPLETED Phase 1

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

NCT00002602

COMPLETED Phase 3

Chemotherapy Plus Radiation Therapy With or Without Surgery in Treating Patients With Stage IIIA Non-small Cell Lung Cancer

NCT00002550

COMPLETED Phase 3

Radiation Therapy Plus Chemotherapy in Treating Patients With Supratentorial Glioblastoma Multiforme

NCT00002545

COMPLETED Phase 3

Radiation Therapy With or Without Chemotherapy in Treating Patients With Advanced Cancer of the Larynx

NCT00002496

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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)

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.