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 3 of 7

COMPLETED Phase 2

Phase 2 Efficacy, Safety, and Tolerability Study of Natalizumab in Focal Epilepsy

NCT03283371

COMPLETED

Cognitive, Behavioral, and Functional Change in Behavioral Variant Frontotemporal Dementia (bvFTD)

NCT03088956

TERMINATED Phase 2

Evaluating the Efficacy, Safety, Pharmacokinetics, and Pharmacodynamics of BIIB054 in Participants With Parkinson's Disease

NCT03318523

COMPLETED Phase 2

A Phase 2 Trial of the Safety and Efficacy of Bardoxolone Methyl in Patients With Rare Chronic Kidney Diseases - PHOENIX

NCT03366337

COMPLETED

MS PATHS Normative Sub-Study

NCT02996084

COMPLETED Phase 3

Efficacy and Safety of BIIB111 for the Treatment of Choroideremia

NCT03496012

COMPLETED Phase 2

A Safety Study of Retinal Gene Therapy for Choroideremia With Administration of BIIB111

NCT03507686

TERMINATED Phase 2

Efficacy and Safety of BIIB033 (Opicinumab) as an Add-on Therapy to Disease-Modifying Therapies (DMTs) in Relapsing Multiple Sclerosis (MS)

NCT03222973

COMPLETED Phase 1

A Drug Interaction Study of BIIB074 and an Oral Contraceptive Regimen

NCT03324685

COMPLETED Phase 1

Effect of Itraconazole on the Pharmacokinetics of Bardoxolone Methyl in Healthy Adults

NCT03264079

COMPLETED Phase 1

Safety, Tolerability, and Pharmacokinetics of Single Doses of BIIB059 in Healthy Japanese Subjects.

NCT03224793

COMPLETED Phase 1

A Study to Assess the Pharmacodynamic Effects of SAGE-217 in Healthy Adults Using an Insomnia Model

NCT03284931

COMPLETED Phase 1

Study to Evaluate the Effect of UGT Inhibition by Valproic Acid on the Pharmacokinetics of BIIB074

NCT03385525

COMPLETED

Tysabri Observational Cohort Study - Multiple Sclerosis (MS) Registries

NCT03399981

TERMINATED Phase 2

Study of BIIB092 in Participants With Progressive Supranuclear Palsy

NCT03068468

TERMINATED Phase 3

Efficacy and Safety of Daclizumab in Participants With RRMS Switching From Natalizumab

NCT02881567

TERMINATED Phase 3

Extended Access Program to Assess Long-term Safety of Bardoxolone Methyl in Patients With Pulmonary Hypertension RANGER

NCT03068130

COMPLETED Phase 2

A Study to Evaluate SAGE-217 in Participants With Essential Tremor

NCT02978781

COMPLETED Phase 3

A Tolerability Study of ALKS 8700 in Subjects With Relapsing Remitting Multiple Sclerosis (RRMS) EVOLVE-MS-2

NCT03093324

COMPLETED Phase 1

A Clinical Trial of Retinal Gene Therapy for X-linked Retinitis Pigmentosa Using BIIB112

NCT03116113

COMPLETED Phase 3

Long-Term Evaluation of BIIB067 (Tofersen)

NCT03070119

COMPLETED Phase 2

A Phase 2/3 Trial of the Efficacy and Safety of Bardoxolone Methyl in Patients With Alport Syndrome - CARDINAL

NCT03019185

COMPLETED Phase 1

Single-Ascending-Dose Study of BIIB076 in Healthy Volunteers and Participants With Alzheimer's Disease

NCT03056729

COMPLETED

Scan-Rescan Sub-Study of MS PATHS

NCT04123353

COMPLETED Phase 3

A Study to Evaluate SAGE-217 in Participants With Severe Postpartum Depression

NCT02978326

COMPLETED Phase 1

A Study of the Safety, Tolerability, and Pharmacokinetics of Single and Multiple Doses of RTA 901 in Healthy Adults

NCT02666963

COMPLETED Phase 2

A Study to Evaluate SAGE-217 in Participants With Moderate to Severe Major Depressive Disorder

NCT03000530

COMPLETED Phase 1

New Formulation and Food Effect Study of BIIB074

NCT02951221

COMPLETED Phase 2

A Study to Evaluate SAGE-217 in Participants With Parkinson's Disease

NCT03000569

COMPLETED Phase 2

Study to Evaluate BIIB059 (Litifilimab) in Cutaneous Lupus Erythematosus (CLE) With or Without Systemic Lupus Erythematosus (SLE)

NCT02847598

TERMINATED Phase 3

Bardoxolone Methyl in Patients With Connective Tissue Disease-associated Pulmonary Arterial Hypertension - CATALYST

NCT02657356

COMPLETED Phase 2

A Phase 2a Study of BIIB074 in the Treatment of Erythromelalgia

NCT02917187

TERMINATED Phase 2

A Study To Evaluate The Safety And Efficacy Of PF-04958242 In Subjects With Cognitive Impairment Associated With Schizophrenia (CIAS)

NCT02855411

COMPLETED Phase 1

A Phase 1, Single-Ascending-Dose, Safety, Tolerability, Pharmacokinetic(PK), and Pharmacodynamic(PD) Study of BIIB068 in Healthy Participants

NCT02829541

COMPLETED Phase 2

Safety and Efficacy of Intravenous Natalizumab in Acute Ischemic Stroke

NCT02730455

COMPLETED Phase 1

Pharmacokinetics, Safety and Tolerability of Single Doses of BIIB033 (Opicinumab) Produced by 2 Manufacturing Processes

NCT02833142

COMPLETED Phase 1

Absolute Bioavailability of a Single, Fixed Subcutaneous Dose of Aducanumab in Healthy Participants

NCT02782975

COMPLETED

Observational Study to Characterize Real-world Clinical Outcomes With Relapsing-remitting Multiple Sclerosis (RRMS)

NCT02776072

COMPLETED Phase 1

Absorption, Metabolism, and Excretion Study of BIIB074

NCT02751905

COMPLETED Phase 1

Multiple Dose Study Of BIIB118 (PF-05251749) In Healthy Volunteers

NCT02691702

COMPLETED

MSPT Device Usability Study

NCT02664324

COMPLETED Phase 3

Extension Study of BG00012 in Pediatric Subjects With Relapsing Remitting Multiple Sclerosis (RRMS)

NCT02555215

TERMINATED Phase 1

Extension Study of BIIB092 in Participants With Progressive Supranuclear Palsy (PSP) Who Participated in CN002003

NCT02658916

COMPLETED Phase 3

An Efficacy, Safety, Tolerability, Pharmacokinetics and Pharmacodynamics Study of BIIB067 (Tofersen) in Adults With Inherited Amyotrophic Lateral Sclerosis (ALS)

NCT02623699

COMPLETED

Methodology Study of Novel Outcome Measures to Assess Progression of ALS

NCT02611674

COMPLETED Phase 3

A Study of ALKS 8700 in Adults With Relapsing Remitting Multiple Sclerosis (MS) EVOLVE-MS-1

NCT02634307

COMPLETED Phase 3

A Study for Participants With Spinal Muscular Atrophy (SMA) Who Previously Participated in Nusinersen (ISIS 396443) Investigational Studies

NCT02594124

COMPLETED Phase 1

Multiple Ascending Dose Study of Intravenously Administered BMS-986168 (BIIB092) in Patients With Progressive Supranuclear Palsy

NCT02460094

COMPLETED Phase 2

Study of the Effect of BG00012 on MRI Lesions and Pharmacokinetics in Pediatric Subjects With RRMS

NCT02410200

TERMINATED Phase 3

221AD302 Phase 3 Study of Aducanumab (BIIB037) in Early Alzheimer's Disease

NCT02484547

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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.