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 7 of 7

COMPLETED Phase 1

RTA 402 in Patients With Advanced Solid Tumors or Lymphoid Malignancies

NCT00529438

COMPLETED Phase 3

Natalizumab Re-Initiation of Dosing

NCT00306592

COMPLETED Phase 1

Study of Oral CNF2024 (BIIB021) in Advanced Solid Tumors

NCT00345189

TERMINATED Phase 1

Phase 1, Dose-Escalation Study of Oral CNF2024(BIIB021) in CLL

NCT00344786

COMPLETED

A Serologic Study to Correlate Beta-IFN NAb Titers to Beta-IFN Induced Biomarker Response in Patients With Multiple Sclerosis

NCT00288990

COMPLETED Phase 1

A Safety Study of RTA 744 in Patients With Recurrent High-Grade Gliomas

NCT00526812

COMPLETED Phase 2

Dose-Escalating Study of BG9924 in Combination With Methotrexate in Active Rheumatoid Arthritis

NCT00292422

COMPLETED Phase 1

Interferon-Beta Gene Transfer (Ad.hIFN-β) as Treatment for Refractory Colorectal Carcinoma With Liver Metastases

NCT00107861

TERMINATED Phase 1

Phase 1, Dose-Escalation, Pharmacodynamic Study of IV CNF1010 in ZAP-70 Positive CLL

NCT00319930

TERMINATED Phase 1

Safety and Tolerability of hCBE-11 in Subjects With Advanced Solid Tumors

NCT00105170

TERMINATED Phase 1

Safety and Activity of 90Y-Labeled IDEC-159 in Subjects With Metastatic Colorectal Adenocarcinoma

NCT00102024

TERMINATED Phase 2

Natalizumab in the Treatment of Rheumatoid Arthritis in Subjects Receiving Methotrexate

NCT00083759

COMPLETED Phase 3

A Clinical Trial of Natalizumab in Individuals With Moderately to Severely Active Crohn's Disease

NCT00078611

COMPLETED Phase 1

Lumiliximab in Combination With FCR in Subjects With Relapsed Chronic Lymphocytic Leukemia (CLL)

NCT00103558

COMPLETED Phase 2

Safety and Efficacy of Avonex in Subjects With Chronic Inflammatory Demyelinating Polyradiculoneuropathy (CIDP)

NCT00099489

COMPLETED

Pregnancy Exposure Registry for Avonex (Interferon Beta-1a)

NCT00168714

COMPLETED Phase 3

Open-Label Natalizumab Safety Extension Study

NCT00276172

COMPLETED Phase 4

Effect of Rituximab on Immunological Recall Response to Specific Antigens in the Treatment of Non-Hodgkin's Lymphoma

NCT00090038

COMPLETED Phase 4

Zevalin® Followed by Rituxan® Maintenance in Previously Treated Low Grade Non-Hodgkin's Lymphoma

NCT00168727

COMPLETED Phase 4

AVONEX® Combination Trial - "ACT"

NCT00112034

TERMINATED Phase 3

Safety and Efficacy of Zevalin in the Treatment of Non-Hodgkin's Lymphoma

NCT00057343

COMPLETED Phase 3

Safety and Tolerability of Repeat Courses of IM Alefacept

NCT00233662

COMPLETED Phase 1

Safety and Efficacy of IDEC-114 in Combination With Rituxan in the Treatment of Non-Hodgkin's Lymphoma

NCT00048555

COMPLETED Phase 1

Safety and Efficacy of IDEC-152 in the Treatment of Chronic Lymphocytic Leukemia (CLL)

NCT00046488

COMPLETED

Study to Determine if Avonex and Rebif Work Comparably Well in Subjects With Relapsing Multiple Sclerosis

NCT00599274

COMPLETED Phase 4

Open Label Natalizumab Safety Extension Study for Subjects With Crohn's Disease

NCT00280956

COMPLETED Phase 1

Dose Escalation Study to Determine the Safety of IFN-Beta Gene Transfer in the Treatment of Grade III & Grade IV Gliomas

NCT00031083

COMPLETED Phase 2

Safety and Efficacy of Natalizumab in Combination With Remicade in the Treatment of Crohn's Disease

NCT00055536

COMPLETED Phase 2

Safety, Tolerability and Effectiveness of Natalizumab in Adolescents With Active Crohn's Disease

NCT00055367

COMPLETED Phase 3

Safety and Efficacy of Natalizumab in Combination With Avonex in the Treatment of Multiple Sclerosis

NCT00030966

COMPLETED Phase 1

Safety and Efficacy of IDEC-114 in the Treatment of Non-Hodgkin's Lymphoma

NCT00575068

COMPLETED Phase 3

Safety and Efficacy of Natalizumab in the Treatment of Crohn's Disease

NCT00032799

COMPLETED Phase 3

Safety and Efficacy of Natalizumab in the Treatment of Multiple Sclerosis

NCT00027300

COMPLETED Phase 3

Treatment of Relapsed Low-Grade or Follicular Lymphoma With Rituximab (Also Known as Rituxan, IDEC-C2B8, IDEC-102)

NCT00168740

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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.