Eisai

Open enrollment with an early-phase pipeline tilt

According to ClinicalTrials.gov-derived indexes, Eisai sits in the top decile of US sponsors by registered trial count (#121 of 15,742 sponsors by registered trial count).

287 total trials 5 currently recruiting 243 completed early-phase tilt top decile by trial count

Eisai: 287 sponsored US clinical trials, 5 recruiting.

Eisai sponsors 287 registered US clinical trials on ClinicalTrials.gov, 5 of them currently recruiting, and 243 completed. 67 of these trials are in Phase 3-4 (later-stage) and 214 in Phase 1-2 (earlier-stage). The most-studied condition in this pipeline is Healthy Subjects, with 6 trials.

Top-decile sponsor footprint

Eisai ranks in the top decile of sponsors by registered trial count (#121 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

D 62/100

243 of 273 decided trials (Completed vs. Terminated on ClinicalTrials.gov) reached their planned completion (89.0%), 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.

Open and recent trials

287 total, page 6 of 6

COMPLETED Phase 2

Trial of Decitabine in Patients With Acute Myelogenous Leukemia or Myelodysplastic Syndrome

NCT00760084

COMPLETED Phase 1

An Open-Label Study of E7974 Administered on Days 1, 8, and 15 of a 28-Day Cycle and Days 1 and 8 of a 21-Day Cycle in Patients With Solid Malignancies

NCT00121732

COMPLETED Phase 2

Safety and Efficacy of APD356 in the Treatment of Obesity

NCT00116740

COMPLETED Phase 2

A Study of Decitabine Given to Adults With Advanced-Stage Myelodysplastic Syndromes

NCT00260065

COMPLETED Phase 1

Pharmacokinetic Trial of Decitabine (Dacogen) Administered as a 3-hour Infusion to Patients With Acute Myelogenous Leukemia or Myelodysplastic Syndrome

NCT01378416

COMPLETED Phase 2

Study of Irofulven Plus Capecitabine in Patients With Advanced Thyroid Cancer

NCT00124527

COMPLETED Phase 2

E2007 Given as Adjunctive Therapy in Patients With Refractory Partial Seizures

NCT00144690

COMPLETED Phase 2

A Study of ONTAK in Patients With Relapsed or Refractory, B-Cell Non Hodgkin's Lymphoma

NCT00211276

COMPLETED Phase 2

Study of Decitabine for Treatment of Older Patients With Acute Myeloid Leukemia (AML)

NCT00358644

COMPLETED Phase 2

Efficacy and Safety Study of E2007 in Migraine Prophylaxis

NCT00154063

COMPLETED Phase 2

Phase II Study Of E7389, Halichondrin B Analogue, In Patients With Advanced Non-Small Cell Lung Cancer, NSCLC, Who Progressed During Or After Platinum-Based Doublet Chemotherapy

NCT00100932

COMPLETED Phase 2

Safety and Efficacy of APD356 in the Treatment of Obesity

NCT00104507

COMPLETED Phase 2

Maintenance Intermittent Therapy for Symptomatic GERD Patients

NCT00165841

COMPLETED Phase 2

A Study of E7389 in Advanced/Metastatic Breast Cancer Patients

NCT00097721

COMPLETED Phase 2

Study of Irofulven in Patients With Hormone-refractory Prostate Cancer

NCT00124566

COMPLETED Phase 2

A Study of ONTAK and CHOP in Newly Diagnosed, Peripheral T-Cell Lymphoma

NCT00211185

COMPLETED Phase 2

Study to Evaluate the Efficacy, Safety, and Tolerability of E7070 in Metastatic Breast Cancer Patients

NCT00080197

COMPLETED Phase 1

Dosing and Safety Study of E7820 in Patients With a Malignant Solid Tumor or Lymphoma

NCT00078637

COMPLETED Phase 4

The Evaluation of the Efficacy and Safety of Donepezil Hydrochloride in Subjects With Mild Cognitive Impairment (MCI)

NCT00293176

COMPLETED Phase 2

Evaluate the Effects of GPI 1485 on Erectile Function Following Bilateral Nerve-Sparing Prostatectomy

NCT00090376

COMPLETED Phase 1

Study of E7389 in Patients With Advanced Solid Tumors

NCT00069264

COMPLETED Phase 1

Study of E7389 Administered Once Every 3 Weeks In Patients With Advanced Solid Tumors

NCT00069277

COMPLETED Phase 2

Study of ONTAK in Patients With B-Cell Chronic Lymphocytic Leukemia (CLL)

NCT00055146

COMPLETED Phase 3

Donepezil Hydrochloride (E2020) in Dementia Associated With Cerebrovascular Disease

NCT00165737

COMPLETED Phase 1

Dose-Finding Study of E7070 in Combination With Irinotecan

NCT00060567

COMPLETED Phase 2

An Evaluation Of The Efficacy And Safety Of Donepezil Hydrochloride (E2020) In Migraine Prophylaxis

NCT01146509

COMPLETED Phase 2

A Safety, Tolerability and Efficacy Study of E7070 in Patients With Renal Cell Carcinoma

NCT00059735

COMPLETED Phase 3

Evaluation of Efficacy, Safety and Tolerability of Targretin Capsules in Patients With Advanced or Metastatic Non-small Cell Lung Cancer

NCT00050960

COMPLETED Phase 3

Dose Response Study of Zonegran in Patients With Newly Diagnosed Epilepsy

NCT00056576

COMPLETED Phase 2

A Safety and Efficacy Study of Intravenous E5564 in Patients With Severe Sepsis

NCT00046072

COMPLETED Phase 4

Study of ONTAK® to Treat Cutaneous T-Cell Lymphoma (CTCL)

NCT00211198

COMPLETED Phase 3

Efficacy and Safety of Aricept in the Treatment of Severe Alzheimer's Disease

NCT00096473

COMPLETED Phase 2

Phase II Study of ONTAK in Previously Treated Patients With Low-grade Non-Hodgkin's Lymphoma (NHL)

NCT00051025

COMPLETED Phase 3

Irofulven Compared With Fluorouracil in Treating Patients With Pancreatic Cancer

NCT00033735

COMPLETED Phase 4

Study of ONTAK (Denileukin Diftitox) in Previously Treated Cutaneous T-Cell Lymphoma Patients

NCT00051012

COMPLETED Phase 4

Study of ONTAK (Denileukin Diftitox) in Cutaneous T-Cell Lymphoma (CTCL) Patients

NCT00050999

COMPLETED Phase 3

Evaluation of Efficacy, Safety and Tolerability of Targretin Capsules in Patients With Advanced or Metastatic Non-small Cell Lung Cancer

NCT00050973

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Phase Distribution

PhaseTrial count
Phase 1 122
Phase 2 92
Phase 3 52
Phase 4 15

What is open in the Eisai pipeline

5 recruiting of 287 indexed (2% open); 243 completed (85%).

Phase mix: 67 late (III/IV) vs 214 early (I/II) (early-phase heavy).

Top condition: Healthy Subjects (6 trials), 9 others listed.

How open-pipeline share is computed

Recruiting share is recruiting_count divided by trial_count for this sponsor in the public registry export. Status can change between pulls; treat the figure as a research-attention snapshot, not product availability.

Eisai: open-pipeline peers nationwide

Peers matched on 287 registered trials and 2% open enrollment, not the therapeutic-area sidebar.

Eisai sits at or above the median trial volume and below 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 0100200300400 0%5%10%15%20% Total trials Recruiting share EisaiUniversity of Missouri-ColumbiaThomas Jefferson UniversityUniversity of Michigan Rogel Cancer CenterKaiser PermanenteMedtronic Cardiac Rhythm and Heart FailureBausch & Lomb IncorporatedLexicon PharmaceuticalsAlcon Research
Eisai sits at or above the median trial volume and below the median recruiting share among these 9 nationwide peers -- the two do not always move together. Source: ClinicalTrials.gov (2026-08-08 snapshot).

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

Sponsors near 287 trials (± recruiting share)

Sponsors near 2% open enrollment (± trial volume)

What to do with this Eisai page

287 registered trials is a research-attention snapshot, not an endorsement of Eisai or any single study.

  • 5 of Eisai's trials are currently recruiting, check each one's own eligibility criteria before contacting a site. Browse recruiting trials
  • Healthy Subjects is the condition Eisai studies most, compare against other sponsors active in the same condition before evaluating a specific study. See Healthy Subjects 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.

Eisai pipeline card: 287 registered trials from official public datasets.Report a data error.