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 5 of 7

COMPLETED Phase 2

Study to Assess the Efficacy, Safety, Tolerability, and Pharmacokinetics of BIIB033 in Participants With Relapsing Forms of Multiple Sclerosis When Used Concurrently With Avonex

NCT01864148

COMPLETED Phase 1

PeptoBismol® Use to Reduce Gastrointestinal Events in Healthy Volunteers Receiving DMF [Tecfidera®] Twice Daily

NCT01915901

COMPLETED

Effectiveness of DMF and Its Impact on PROs in Suboptimal GA Responders With RMS

NCT01903291

COMPLETED Phase 2

BG00010 (Neublastin) Phase 2 Multiple Dose Adaptive Design in Participants With Painful Lumbar Radiculopathy

NCT01873404

COMPLETED

Functional MRI in Lupus Nephritis

NCT01731054

COMPLETED Phase 2

A Study to Assess the Efficacy, Safety and Pharmacokinetics of Nusinersen (ISIS 396443) in Infants With Spinal Muscular Atrophy (SMA)

NCT01839656

COMPLETED Phase 4

Phase 4 Gastrointestinal Tolerability Study of Dimethyl Fumarate in Patients With Relapsing Forms of Multiple Sclerosis in the United States

NCT01873417

TERMINATED Phase 3

Long-Term Extension Study in Participants With Multiple Sclerosis Who Have Completed Study 205MS301 (NCT01064401) to Evaluate the Safety and Efficacy of BIIB019

NCT01797965

COMPLETED Phase 1

An Open-label Safety and Tolerability Study of Nusinersen (ISIS 396443) in Participants With Spinal Muscular Atrophy Who Previously Participated in ISIS 396443-CS1 (NCT01494701)

NCT01780246

COMPLETED Phase 1

A Study To Examine The Effects Of PF-04958242 On Ketamine-Induced Cognitive Impairment In Healthy Volunteers

NCT01749098

COMPLETED Phase 1

An Open-label Safety, Tolerability and Dose-Range Finding Study of Multiple Doses of Nusinersen (ISIS 396443) in Participants With Spinal Muscular Atrophy

NCT01703988

TERMINATED Phase 1

Multiple Dose Study of Aducanumab (BIIB037) (Recombinant, Fully Human Anti-Aβ IgG1 mAb) in Participants With Prodromal or Mild Alzheimer's Disease

NCT01677572

COMPLETED Phase 1

Multiple-Dose Study of Effect of Bardoxolone Methyl on QT/QTC Interval Volunteers

NCT01689116

COMPLETED Phase 2

STX-100 in Patients With Idiopathic Pulmonary Fibrosis (IPF)

NCT01371305

COMPLETED Phase 1

Study in Healthy Volunteers to Establish the Bioequivalence of Two Different Manufacturers.

NCT01632449

COMPLETED Phase 1

Study Of The PF-04958242 Blood Concentrations Of A Capsule Formulation Of PF-04958242 Compared To A Solution Formulation

NCT01646840

TERMINATED Phase 2

BIIB023 Proof-of-Concept Study in Participants With Lupus Nephritis

NCT01499355

COMPLETED Phase 1

An Open-Label Study of the Effect of Bardoxolone Methyl on the Single Dose Pharmacokinetics of Digoxin and Rosuvastatin in Healthy Volunteers

NCT01598363

COMPLETED Phase 1

Peginterferon Beta-1a (BIIB017) Autoinjector Pharmacokinetic Study in Healthy Volunteers

NCT01610310

COMPLETED Phase 1

Single-Dose, Open-Label Pharmacokinetic Study of Bardoxolone Methyl in Subjects With Mild, Moderate, and Severe Hepatic Impairment and Normal Hepatic Function

NCT01563562

COMPLETED Phase 3

Effect of Aspirin Pretreatment or Slow Dose Titration on Flushing and Gastrointestinal Events in Healthy Volunteers Receiving Delayed-release Dimethyl Fumarate

NCT01568112

COMPLETED

Observational Study of Tysabri in Early Relapsing-Remitting Multiple Sclerosis in Anti-JC Virus Antibody Negative Participants

NCT01485003

COMPLETED Phase 1

Demonstrate the Bioequivalence of Interferon Beta-1a (INFB) Manufactured by Two Different Processes in Healthy Volunteers

NCT01500408

COMPLETED Phase 1

A Phase I Study to Investigate the Absorption, Metabolism and Excretion in Healthy Male Subjects

NCT01503866

COMPLETED Phase 1

A Study Of The Effects Of PF-04958242 In Subjects With Age-Related Hearing Loss

NCT01518920

COMPLETED Phase 1

An Open-label Safety, Tolerability, and Dose-range Finding Study of Nusinersen (ISIS 396443) in Participants With Spinal Muscular Atrophy (SMA)

NCT01494701

COMPLETED Phase 3

An Open-Label Immunogenicity and Pharmacokinetics Study of Daclizumab High Yield Process Prefilled Syringe in Relapsing Remitting Multiple Sclerosis

NCT01462318

COMPLETED Phase 1

A Study To Examine The Safety, Tolerability And Pharmacokinetics Of PF-04958242 In Psychiatrically Stable Subjects With Schizophrenia

NCT01518894

COMPLETED Phase 1

A Single-Dose, Open-Label, Randomized, Food Effect and Blinded, Randomized, Dose Proportionality Study in Healthy Volunteers With Bardoxolone Methyl

NCT01461161

TERMINATED Phase 3

A Clinical Study of the Efficacy of Natalizumab on Reducing Disability Progression in Participants With Secondary Progressive Multiple Sclerosis

NCT01416181

COMPLETED Phase 1

Study in Healthy Volunteers to Establish the BioEquivalence of Two Formulations of BG00012

NCT01420458

COMPLETED Phase 1

A Study To Assess Effects Of PF-04958242 On Bold Functional Magnetic Resonance Imaging During Working Memory Activation And Arterial Spin Labeling At Rest In Healthy Subjects

NCT01365338

COMPLETED Phase 1

Single Ascending Dose Study of BIIB037 in Participants With Alzheimer's Disease

NCT01397539

COMPLETED Phase 1

Study to Evaluate the Safety, Tolerability and Pharmacokinetics of Repeated Doses of PF-04958242 in Healthy Volunteers

NCT01511510

COMPLETED Phase 3

Long-Term Safety and Efficacy Study of Peginterferon Beta-1a

NCT01332019

COMPLETED Phase 1

Alternate Dosing Regimens of BG00012 in Healthy Volunteers

NCT01281111

COMPLETED Phase 1

Safety Study of BIIB033 in Subjects With Multiple Sclerosis

NCT01244139

TERMINATED

Genetic Evaluation of Natalizumab-Treated Patients With Progressive Multifocal Leukoencephalopathy

NCT01211639

TERMINATED Phase 4

Corticosteroids for Immune Reconstitution Inflammatory Syndrome (IRIS)

NCT01211665

COMPLETED Phase 2

BG00012 Phase 2 Combination Study in Participants With Multiple Sclerosis

NCT01156311

COMPLETED

Biomarkers of Anti-TNF-α Therapy Efficacy in Rheumatoid Arthritis to Define Unresponsive Patients

NCT01211678

TERMINATED

Controlled High Risk AVONEX® Multiple Sclerosis Prevention Study In Ongoing Neurological Surveillance

NCT01156298

COMPLETED Phase 1

A Study of Avonex to Determine the Effects of Dose Titration on the Incidence of Flu Like Symptoms in Healthy Volunteers

NCT01119677

COMPLETED Phase 3

Efficacy and Safety of BIIB019 (Daclizumab High Yield Process) Versus Interferon β 1a in Participants With Relapsing-Remitting Multiple Sclerosis

NCT01064401

COMPLETED

JC Virus Antibody Study of Participants With Relapsing Forms of MS Receiving Treatment With Natalizumab

NCT01070836

COMPLETED

JC-Virus (JCV) Antibody Program

NCT01070823

COMPLETED Phase 2

Treatment Interruption of Natalizumab

NCT01071083

TERMINATED Phase 3

Study Evaluating Rebif, Copaxone, and Tysabri for Active Multiple Sclerosis

NCT01058005

COMPLETED Phase 2

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

NCT01053936

COMPLETED Phase 1

Safety Study of RP-1127 (Glyburide for Injection) in Healthy Volunteers

NCT01132703

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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.