Biogen

Open enrollment with an early-phase pipeline tilt

According to ClinicalTrials.gov-derived indexes, Biogen sits in the top decile of US sponsors by registered trial count (#109 of 15,742 sponsors by registered trial count).

334 total trials 21 currently recruiting 237 completed early-phase tilt top decile by trial count

Biogen: 334 sponsored US clinical trials, 21 recruiting.

Biogen sponsors 334 registered US clinical trials on ClinicalTrials.gov, 21 of them currently recruiting, and 237 completed. 84 of these trials are in Phase 3-4 (later-stage) and 198 in Phase 1-2 (earlier-stage). The most-studied condition in this pipeline is Multiple Sclerosis, with 13 trials.

Top-decile sponsor footprint

Biogen ranks in the top decile of sponsors by registered trial count (#109 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

F 36/100

237 of 302 decided trials (Completed vs. Terminated on ClinicalTrials.gov) reached their planned completion (78.5%), 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

334 total, page 6 of 7

COMPLETED Phase 1

BIIB033 Single Ascending Dose Study in Healthy Volunteer Subjects

NCT01052506

COMPLETED Phase 1

BIIB014 Cardiovascular Monitoring Study

NCT01035515

COMPLETED Phase 2

Hormone Receptor Positive Metastatic Breast Cancer (HR+ mBC) BIIB021 Plus Aromasin Schedule Finding

NCT01004081

COMPLETED Phase 1

Effect of Food and Antacid on BIIB021 With Advanced Solid Tumors

NCT01017198

COMPLETED Phase 1

A Study of BIIB022 in Combination With Paclitaxel and Carboplatin in Subjects With Non-Small Cell Lung Cancer

NCT00970580

COMPLETED Phase 1

Sorafenib With BIIB022 in Hepatocellular Carcinoma (HCC)

NCT00956436

COMPLETED Phase 1

Study to Investigate the Effect of GSK1014802 on Ambulatory Blood Pressure

NCT00955396

COMPLETED Phase 3

Efficacy and Safety Study of Peginterferon Beta-1a in Participants With Relapsing Multiple Sclerosis

NCT00906399

COMPLETED Phase 2

Trial to Determine the Effects of Bardoxolone Methyl on eGFR in Patients With Type 2 Diabetes and Chronic Kidney Disease

NCT00811889

COMPLETED Phase 1

BG9928 in Subjects With Hepatic Impairment

NCT00858156

COMPLETED Phase 3

BG00012 Monotherapy Safety and Efficacy Extension Study in Multiple Sclerosis (MS)

NCT00835770

TERMINATED Phase 2

Oral Tonapofylline (BG9928) in Patients With Heart Failure and Renal Insufficiency

NCT00745316

COMPLETED Phase 3

Evaluate the Safe and Effective Use of the Avonex® Single-Use Autoinjector in Multiple Sclerosis Subjects

NCT00828204

TERMINATED Phase 1

Study to Explore the Effect of Mefloquine in Participants With Progressive Multifocal Leukoencephalopathy (PML)

NCT00746941

COMPLETED Phase 4

A Pharmacokinetic (PK) Study of Natalizumab (Tysabri) at Steady State

NCT00744679

COMPLETED Phase 1

BIIB023 (Anti-TWEAK) in Subjects With Rheumatoid Arthritis

NCT00771329

TERMINATED Phase 3

Immunogenicity and Safety of Subcutaneously-administered Avonex (Interferon Beta-1a) in Multiple Sclerosis (MS) Patients

NCT00784836

TERMINATED Phase 1

Study of Natalizumab in Relapsed/Refractory Multiple Myeloma

NCT00675428

TERMINATED Phase 1

Mechanism of Action of Galiximab in Subjects With Previously Untreated Follicular Non-Hodgkin's Lymphoma

NCT00651443

COMPLETED Phase 3

Study to Assess the Safety and Tolerability of IV Tonapofylline in Subjects With Acute Decompensated Heart Failure (ADHF) and Renal Insufficiency

NCT00709865

TERMINATED

CD INFORM: Investigating Natalizumab Through Further Observational Research and Monitoring

NCT00707512

COMPLETED Phase 1

Administration of BIIB028 to Subjects With Solid Tumors

NCT00725933

COMPLETED Phase 1

A Phase I Study of BIIB015 in Relapsed/Refractory Solid Tumors

NCT00674947

COMPLETED Phase 2

A Phase 2 Study of Interferon Beta-1a (Avonex®) in Ulcerative Colitis

NCT00616434

COMPLETED Phase 2

Phase IIa Trial to Determine the Effects of Bardoxolone Methyl on Renal Function in Patients With Diabetic Nephropathy

NCT00664027

COMPLETED Phase 1

A Multiple Dose Safety Study of PEG-IFN in Healthy Volunteers

NCT02125578

COMPLETED

ATP Expression in Lymphocytes of MS Patients by Means of "ImmuKnow®" Assay.

NCT00618267

COMPLETED Phase 2

An Open-Label, 18FDG-PET Pharmacodynamic Assessment of the Effect of BIIB021 in Subjects With Gastrointestinal Stromal Tumors (GIST)

NCT00618319

COMPLETED Phase 1

Once or Twice Daily Administration of BIIB021 to Subjects With Advanced Solid Tumors

NCT00618735

TERMINATED Phase 2

Evaluation of Safety and Efficacy of Fludarabine, Cyclophosphamide, and Rituximab (FCR) +/- Lumiliximab in Subjects With Previously Untreated Chronic Lymphocytic Leukemia (CLL)

NCT00801060

COMPLETED Phase 4

The Effects of Tysabri Treatment on Vaccination Response and Lymphocyte Subsets in Subjects With Relapsing Forms of Multiple Sclerosis

NCT00536120

COMPLETED Phase 1

Phase 1 Study of BIIB022 (Anti-IGF-1R Monoclonal Antibody) in Relapsed/Refractory Solid Tumors

NCT00555724

COMPLETED Phase 1

CNF2024 (BIIB021) HER2- (QD) HER2+ (BIW w/Herceptin) PK/PD Study

NCT00412412

TERMINATED Phase 2

RTA 744 in Breast Cancer Patients With Progression of Previously Irradiated Brain Metastases

NCT00538343

COMPLETED Phase 1

Safety Study of Natalizumab to Treat Multiple Sclerosis (MS)

NCT00559702

TERMINATED Phase 1

Study With Gemcitabine and RTA 402 for Patients With Unresectable Pancreatic Cancer

NCT00529113

COMPLETED

Evaluation of Natalizumab for thE Relief of MS Associated FatiGue

NCT00464074

TERMINATED Phase 2

BG9924 in Combination With Methotrexate Extension of Study 104RA203 (NCT 00458861)

NCT00523328

COMPLETED Phase 3

Efficacy and Safety Study of Oral BG00012 With Active Reference in Relapsing-Remitting Multiple Sclerosis

NCT00451451

TERMINATED Phase 1

Study to Assess the Safety, Tolerability, and Pharmacodynamics of RTA 402 in Patients With Hepatic Dysfunction

NCT00550849

COMPLETED

Avonex 15 Year Long Term Follow-up Study

NCT00525343

TERMINATED Phase 2

BG9924 in Combination With Methotrexate for Participants With Active Rheumatoid Arthritis

NCT00458861

COMPLETED Phase 3

Efficacy and Safety of Oral BG00012 in Relapsing-Remitting Multiple Sclerosis

NCT00420212

COMPLETED

Pregnancy Exposure Registry for Tysabri®

NCT00472992

COMPLETED

TYSABRI Global Observational Program in Safety

NCT00477113

COMPLETED Early Phase 1

A Multicenter Study to Assess the Effect of Plasma Exchange in Accelerating the Clearance of Natalizumab in Subjects With Multiple Sclerosis (MS)

NCT00424788

TERMINATED Phase 2

Lumiliximab With Fludarabine, Cyclophosphamide, and Rituximab (FCR) Versus FCR Alone in Subjects With Relapsed Chronic Lymphocytic Leukemia (CLL)

NCT00391066

TERMINATED Phase 1

A Safety Study of RTA 744 in Recurrent, Progressive or Refractory Neoplastic Meningitis

NCT00527410

COMPLETED Phase 2

Natalizumab High Titer Immunogenicity and Safety

NCT00516893

TERMINATED Phase 2

Safety and Tolerability of Rituxan With Methotrexate and Etanercept or Methotrexate and Adalimumab in Patients With Active Rheumatoid Arthritis

NCT00298272

← Previous Page 6 of 7 Next →

What is open in the Biogen pipeline

21 recruiting of 334 indexed (6% open); 237 completed (71%).

Phase mix: 84 late (III/IV) vs 198 early (I/II) (early-phase heavy).

Top condition: Multiple Sclerosis (13 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.

Biogen: open-pipeline peers nationwide

Peers matched on 334 registered trials and 6% open enrollment, not the therapeutic-area sidebar.

Biogen 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 0100200300400 0%5%10%15%20%25% Total trials Recruiting share BiogenNational Institute on Drug Abuse (NIDA)GenentechNational Institutes of Health Clinical Center (CC)Cedars-Sinai Medical CenterAlbert Einstein Healthcare NetworkAltimmuneBassett HealthcareDynavax Technologies Corporation
Biogen 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).

Biogen 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 334 trials (± recruiting share)

Sponsors near 6% open enrollment (± trial volume)

What to do with this Biogen page

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

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

Biogen pipeline card: 334 registered trials from official public datasets.Report a data error.