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Filgotinib

Phase 3

Rheumatoid Arthritis | Small molecule | Immunology |Gilead Sciences, Inc.|Last Updated: May 22, 2026

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Trial Design
RandomizedDouble-BlindCONTROLLEDDMCBiomarker
Total Trials6
Total Enrollment6,238
FDA Designations
No designations recorded
Clinical trial landscape

Filgotinib · 11 trials · 5 indications

Phase 3 6Phase 2 3Phase 1 2
NCT03025308Long Term Extension Study to Assess the Safety and Efficacy of Filgotinib in Adults With Rheumatoid ArthritisRheumatoid Arthritis
COMPLETED2,731 Analytics
NCT02914535Filgotinib in Long-Term Extension Study of Adults With Ulcerative ColitisUlcerative Colitis
ACTIVE NOT_RECRUITING1,173 Analytics
NCT02914522Study to Evaluate the Efficacy and Safety of Filgotinib in the Induction and Maintenance of Remission in Adults With Moderately to Severely Active Ulcerative ColitisUlcerative Colitis
COMPLETED1,351 Analytics
NCT02889796Filgotinib in Combination With Methotrexate in Adults With Moderately to Severely Active Rheumatoid Arthritis Who Have an Inadequate Response to MethotrexateRheumatoid Arthritis
COMPLETED1,759 Analytics
NCT02886728Filgotinib Alone and in Combination With Methotrexate (MTX) in Adults With Moderately to Severely Active Rheumatoid Arthritis Who Are Naive to MTX TherapyRheumatoid Arthritis
COMPLETED1,252 Analytics
NCT02873936Filgotinib Versus Placebo in Adults With Active Rheumatoid Arthritis (RA) Who Have an Inadequate Response to Biologic Disease-modifying Anti-rheumatic Drug(s) (DMARDs) TreatmentRheumatoid Arthritis
COMPLETED449 Analytics
PHASE3COMPLETED
Long Term Extension Study to Assess the Safety and Efficacy of Filgotinib in Adults With Rheumatoid Arthritis
Rheumatoid ArthritisUnlock trial analytics
PHASE3ACTIVE NOT_RECRUITING
Filgotinib in Long-Term Extension Study of Adults With Ulcerative Colitis
Ulcerative ColitisUnlock trial analytics
PHASE3COMPLETED
Study to Evaluate the Efficacy and Safety of Filgotinib in the Induction and Maintenance of Remission in Adults With Moderately to Severely Active Ulcerative Colitis
Ulcerative ColitisUnlock trial analytics
PHASE3COMPLETED
Filgotinib in Combination With Methotrexate in Adults With Moderately to Severely Active Rheumatoid Arthritis Who Have an Inadequate Response to Methotrexate
Rheumatoid ArthritisUnlock trial analytics
PHASE3COMPLETED
Filgotinib Alone and in Combination With Methotrexate (MTX) in Adults With Moderately to Severely Active Rheumatoid Arthritis Who Are Naive to MTX Therapy
Rheumatoid ArthritisUnlock trial analytics
PHASE3COMPLETED
Filgotinib Versus Placebo in Adults With Active Rheumatoid Arthritis (RA) Who Have an Inadequate Response to Biologic Disease-modifying Anti-rheumatic Drug(s) (DMARDs) Treatment
Rheumatoid ArthritisUnlock trial analytics
Study Endpoints
Primary Endpoints
Proportion of Participants Experiencing Adverse Events (AEs)
Up to 6 years
Proportion of Participants Experiencing Clinically Significant Laboratory Abnormalities
Up to 6 years
Overall Safety Profile of Filgotinib Evaluated by Proportion of Participants Experiencing Adverse Events and Abnormal Clinical Laboratory Tests
Up to 336 weeks plus 30 days
Induction Study: Percentage of Participants Who Achieved Endoscopy/Bleeding/Stool Frequency (EBS) Remission at Week 10
Week 10

EBS remission was defined as an endoscopic subscore of 0 or 1; rectal bleeding subscore of 0; and at least a 1-point decrease in stool frequency from baseline to achieve a subscore of 0 or 1. Endoscopic subscore range: 0 to 3, where 0 = normal or inactive disease and 3 = severe disease (spontaneous bleeding, ulceration); rectal bleeding subscore range: 0 to 3, where 0 = no blood seen and 3 = blood alone passes; stool frequency subscore range: 0 to 3, where 0 = normal number of stools and 3 = at least 5 stools more than normal. Total score for EBS ranged from 0 to 9 (sum of all subscores), with higher scores indicating more severe disease.

Maintenance Study: Percentage of Participants Who Achieved EBS Remission at Week 58
Week 58

EBS remission was defined as an endoscopic subscore of 0 or 1; rectal bleeding subscore of 0; and at least a 1-point decrease in stool frequency from baseline to achieve a subscore of 0 or 1. Endoscopic subscore range: 0 to 3, where 0 = normal or inactive disease and 3 = severe disease (spontaneous bleeding, ulceration); rectal bleeding subscore range: 0 to 3, where 0 = no blood seen and 3 = blood alone passes; stool frequency subscore range: 0 to 3, where 0 = normal number of stools and 3 = at least 5 stools more than normal. Total score for EBS ranged from 0 to 9 (sum of all subscores), with higher scores indicating more severe disease.

Percentage of Participants Who Achieved an American College of Rheumatology (ACR) 20% Improvement (ACR20) Response at Week 12
Week 12

ACR20 response is achieved when the participant has: ≥20% improvement (reduction) from baseline in tender joint count based on 68 joints (TJC68), swollen joint count based on 66 joints (SJC66) and in at least 3 of the following 5 items: physician's global assessment of disease activity (PGA) and subject's global assessment of disease activity (SGA) assessed using visual analog scale (VAS) on a scale of 0-100 (0 and 100 indicating no disease activity and maximum disease activity)participant's pain assessment using VAS on a scale of 0-100 (0 and 100 indicating no pain and unbearable pain) health assessment questionnaire-disability index (HAQ-DI) score contains 20 questions,8 components: dressing/ grooming, arising, eating, walking, hygiene, reach, grip and activities and scored on a scale of 0-3 (0 and 3 indicating without difficulty and unable to do); high-sensitivity C-reactive protein (hsCRP). Participants with missing outcomes were set as non-responders.

Percentage of Participants Who Achieved an American College of Rheumatology (ACR) 20% Improvement (ACR20) Response at Week 24
Week 24

ACR20 response is achieved when the participant has: ≥ 20% improvement (reduction) from baseline in tender joint count based on 68 joints (TJC68), swollen joint count based on 66 joints (SJC66) and in at least 3 of the following 5 items: physician's global assessment of disease activity (PGA) and subject's global assessment of disease activity (SGA) assessed using visual analog scale (VAS) on a scale of 0-100 (0 and 100 indicating no disease activity and maximum disease activity); subject's pain assessment using VAS on a scale of 0-100 (0 and 100 indicating no pain and unbearable pain); health assessment questionnaire-disability index (HAQ-DI) score contains 20 questions, 8 components: dressing/grooming, arising, eating, walking, hygiene, reach, grip and activities and scored on a scale of 0-3 (0 and 3 indicating without difficulty and unable to do); high-sensitivity C-reactive protein (hsCRP). Participants with missing outcomes were set as non-responders.

Percent Change in Urine Protein From Baseline (Day 1) to Week 16
Baseline; Week 16

Urine protein was assessed by urinary protein excretion during a 24-hour urine collection.

Percentage of Participants Who Achieved Clinical Remission at Week 24
Week 24

The CDAI score is used to quantify the symptoms of participants with Crohn's Disease (CD). The score ranges from 0 to 600. Clinical remission by CDAI was defined as a score of \< 150. A higher score indicates more severe disease.

Percentage of Participants Who Achieved Combined Fistula Response at Week 24
Week 24

Combined fistula response at Week 24 was defined as reduction of greater than or equal to (≥) 1 from baseline in the number of draining external perianal fistula openings that were present at baseline, and absence of fluid collections \> 1 centimeter (cm) on magnetic resonance imaging (MRI) pelvis at Week 24, among participants with at least 1 draining external perianal fistula opening at baseline.

Pharmacokinetic (PK) Parameter: AUClast of ATV, PRA, and ROS
AB (Days 1,3,12,14) and BA (Days 6,8,18,20): Predose, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48 postdose; AB (Days 1,12) and BA (Days 6,18): 5,10,36 hours post dose; AB (Days 3,14) and BA (Days 8,20): 72 hours postdose

AUClast is defined as the concentration of drug from time zero to the last observable concentration.

PK Parameter: AUCinf of ATV, PRA, and ROS
AB (Days 1,3,12,14) and BA (Days 6,8,18,20): Predose, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48 postdose; AB (Days 1,12) and BA (Days 6,18): 5,10,36 hours post dose; AB (Days 3,14) and BA (Days 8,20): 72 hours postdose

AUCinf is defined as the concentration of drug extrapolated to infinite time.

PK Parameter: Cmax of ATV, PRA, and ROS
AB (Days 1,3,12,14) and BA (Days 6,8,18,20): Predose, 0.5, 1, 1.5, 2, 3, 4, 6, 8, 12, 16, 24, 48 postdose; AB (Days 1,12) and BA (Days 6,18): 5,10,36 hours post dose; AB (Days 3,14) and BA (Days 8,20): 72 hours postdose

Cmax is defined as the maximum observed concentration of drug.

Pharmacokinetic (PK) Parameter: AUClast of Filgotinib
Predose and 0.5, 1, 2, 3, 4, 5, 6, 8, 12, 18, 24, 36, 48, 72, 96, and 120 hours postdose on Day 1

AUClast is defined as the concentration of drug from time zero to the last observable concentration.

PK Parameter: AUClast of GS-829845
Predose and 0.5, 1, 2, 3, 4, 5, 6, 8, 12, 18, 24, 36, 48, 72, 96, and 120 hours postdose on Day 1

AUClast is defined as the concentration of drug from time zero to the last observable concentration. GS-829845 is the primary metabolite of filgotinib.

PK Parameter: AUCinf of Filgotinib
Predose and 0.5, 1, 2, 3, 4, 5, 6, 8, 12, 18, 24, 36, 48, 72, 96, and 120 hours postdose on Day 1

AUCinf is defined as the concentration of drug extrapolated to infinite time.

PK Parameter: AUCinf of GS-829845
Predose and 0.5, 1, 2, 3, 4, 5, 6, 8, 12, 18, 24, 36, 48, 72, 96, and 120 hours postdose on Day 1

AUCinf is defined as the concentration of drug extrapolated to infinite time. GS-829845 is the primary metabolite of filgotinib.

PK Parameter: Cmax of Filgotinib
Predose and 0.5, 1, 2, 3, 4, 5, 6, 8, 12, 18, 24, 36, 48, 72, 96, and 120 hours postdose on Day 1

Cmax is defined as the maximum observed concentration of drug.

PK Parameter: Cmax of GS-829845
Predose and 0.5, 1, 2, 3, 4, 5, 6, 8, 12, 18, 24, 36, 48, 72, 96, and 120 hours postdose on Day 1

Cmax is defined as the maximum observed concentration of drug. GS-829845 is the primary metabolite of filgotinib.

Secondary Endpoints
Proportion of Participants Achieving American College of Rheumatology- N (ACR-N) Response in Each Arm
Up to 6 years
Change From Baseline in Components of Mayo Clinic Score (MCS)
Baseline and up to 336 weeks
Induction Study: Percentage of Participants Who Achieved MCS Remission at Week 10
Week 10
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Study Design & Arms
AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Blinded Phase: Filgotinib 200 mgEXPERIMENTALFilgotinib 200 mg plus placebo to match (PTM) filgotinib 100 mg for up to 6 years
Blinded Phase: Filgotinib 100 mgEXPERIMENTALFilgotinib 100 mg plus PTM filgotinib 200 mg for up to 6 years
Open Label Phase: Filgotinib 200 mgEXPERIMENTALFilgotinib 200 mg for up to 6 years
Open Label Phase: Filgotinib 100 mgEXPERIMENTALFilgotinib 100 mg for up to 6 years
Filgotinib 200 mg (blinded dosing)EXPERIMENTALFilgotinib 200 mg + placebo to match filgotinib 100 mg for up to 336 weeks
Filgotinib 100 mg (blinded dosing)EXPERIMENTALFilgotinib 100 mg + placebo to match filgotinib 200 mg for up to 336 weeks
Placebo (blinded dosing)PLACEBO_COMPARATORPlacebo to match filgotinib 200 mg + placebo to match filgotinib 100 mg for up to 336 weeks
Filgotinib 200 mg (open-label)EXPERIMENTALFilgotinib 200 mg for up to 336 weeks
Filgotinib 100 mg (open-label)EXPERIMENTALFilgotinib 100 mg for up to 336 weeks
Induction Study (Cohort A): Filgotinib 200 mgEXPERIMENTALParticipants in Cohort A (biologic-naive) received filgotinib 200 milligrams (mg) and placebo-to-match (PTM) filgotinib 100 mg orally once daily for 10 weeks.
Induction Study (Cohort A): Filgotinib 100 mgEXPERIMENTALParticipants in Cohort A (biologic-naive) received filgotinib 100 mg and PTM filgotinib 200 mg orally once daily for 10 weeks.
Induction Study (Cohort A): PlaceboPLACEBO_COMPARATORParticipants in Cohort A (biologic-naive) received PTM filgotinib 200 mg and PTM filgotinib 100 mg orally once daily for 10 weeks.
Induction Study (Cohort B): Filgotinib 200 mgEXPERIMENTALParticipants in Cohort B (biologic-experienced) received filgotinib 200 mg and PTM filgotinib 100 mg orally once daily for 10 weeks.
Induction Study (Cohort B): Filgotinib 100 mgEXPERIMENTALParticipants in Cohort B (biologic-experienced) received filgotinib 100 mg and PTM filgotinib 200 mg orally once daily for 10 weeks.
Induction Study (Cohort B): PlaceboPLACEBO_COMPARATORParticipants in Cohort B (biologic-experienced) received PTM filgotinib 200 mg and PTM filgotinib 100 mg orally once daily for 10 weeks.
Maintenance Study: Filgotinib 200 mg From Induction Filgotinib 200 mgEXPERIMENTALParticipants in the Filgotinib 200 mg arm who completed the Induction Study and achieved either Endoscopy/Bleeding/Stool Frequency (EBS) remission or Mayo Clinic Score (MCS) response at Week 10 were re-randomized at Week 11 into the Maintenance Study to receive filgotinib 200 mg and PTM filgotinib 100 mg for an additional 47 weeks (up to Week 58).
Maintenance Study: Placebo From Induction Filgotinib 200 mgPLACEBO_COMPARATORParticipants in the Filgotinib 200 mg arm who completed the Induction Study and achieved either EBS remission or MCS response at Week 10 were re-randomized at Week 11 into the Maintenance Study to receive PTM filgotinib orally once daily for an additional 47 weeks (up to Week 58).
Maintenance Study: Filgotinib 100 mg From Induction Filgotinib 100 mgEXPERIMENTALParticipants in the Filgotinib 100 mg arm who completed the Induction Study and achieved either EBS remission or MCS response at Week 10 were re-randomized at Week 11 into the Maintenance Study to receive filgotinib 100 mg and PTM filgotinib 200 mg for an additional 47 weeks (up to Week 58).
Maintenance Study: Placebo From Induction Filgotinib 100 mgPLACEBO_COMPARATORParticipants in the Filgotinib 100 mg arm who completed the Induction Study and achieved either EBS remission or MCS response at Week 10 were rerandomized at Week 11 into the Maintenance Study to receive PTM filgotinib orally once daily for an additional 47 weeks (up to Week 58).
Maintenance Study: Placebo From Induction PlaceboPLACEBO_COMPARATORParticipants in the Placebo arm who completed the Induction Study and achieved either EBS remission or MCS response at Week 10 were re-randomized at Week 11 into the Maintenance Study to receive PTM filgotinib for an additional 47 weeks (up to Week 58).
Filgotinib 200 mgEXPERIMENTALFilgotinib 200 mg + placebo to match filgotinib 100 mg + placebo to match adalimumab 40 mg in addition to a stable dose of methotrexate (MTX)
Filgotinib 100 mgEXPERIMENTALFilgotinib 100 mg + placebo to match filgotinib 200 mg + placebo to match adalimumab 40 mg in addition to a stable dose of MTX
AdalimumabACTIVE_COMPARATORPlacebo to match filgotinib 200 mg + placebo to match filgotinib 100 mg + adalimumab 40 mg in addition to a stable dose of MTX
Placebo to Filgotinib 200 mgEXPERIMENTALPlacebo to match filgotinib 200 mg + placebo to match filgotinib 100 mg + placebo to match adalimumab 40 mg in addition to a stable dose of MTX for up to 24 weeks. After 24 weeks, participants will be rerandomized to filgotinib 200 mg to receive filgotinib 200 mg + placebo to match filgotinib 100 mg + placebo to match adalimumab 40 mg in addition to a stable dose of MTX.
Placebo to Filgotinib 100 mgEXPERIMENTALPlacebo to match filgotinib 200 mg + placebo to match filgotinib 100 mg + placebo to match adalimumab 40 mg in addition to a stable dose of MTX for up to 24 weeks. After 24 weeks, participants will be rerandomized to filgotinib 100 mg to receive filgotinib 100 mg + placebo to match filgotinib 200 mg + placebo to match adalimumab 40 mg in addition to a stable dose of MTX.
Placebo Never Received FilgotinibPLACEBO_COMPARATORPlacebo to match filgotinib 200 mg + placebo to match filgotinib 100 mg + placebo to match adalimumab 40 mg in addition to a stable dose of MTX for up to 24 weeks.
Filgotinib 200 mg + MTXEXPERIMENTALFilgotinib 200 mg + placebo to match filgotinib 100 mg + MTX up to 20 mg
Filgotinib 100 mg + MTXEXPERIMENTALFilgotinib 100 mg + placebo to match filgotinib 200 mg + MTX up to 20 mg
Filgotinib 200 mg MonotherapyEXPERIMENTALFilgotinib 200 mg + placebo to match filgotinib 100 mg + placebo to match MTX
MTX MonotherapyACTIVE_COMPARATORPlacebo to match filgotinib 200 mg + placebo to match filgotinib 100 mg + MTX up to 20 mg
PlaceboPLACEBO_COMPARATORPlacebo to match filgotinib 200 mg + placebo to match filgotinib 100 mg + stable dose of permitted csDMARD(s)
Lanraplenib 30 mgEXPERIMENTALParticipants receive lanraplenib 30 mg tablet + filgotinib placebo tablet orally once daily for 16 weeks in Blinded Treatment Phase. Participants who achieve ≥ 35% reduction in urinary protein excretion from baseline continue to receive same blinded study treatment for additional 16 weeks. Participants who did not achieve a ≥ 35% reduction in urinary protein excretion will switch treatment. After 32 weeks of blinded treatment, participants who have ≥ 35% reduction in urinary protein excretion from baseline continue their assigned blinded treatment for additional 20 weeks in Extended Blinded Treatment Phase.
Lanraplenib 30 mg to Filgotinib 200 mgEXPERIMENTALAt Week 16, participants who do not achieve a ≥ 35% reduction in urinary protein excretion from baseline to Week 16 switch treatment and receive filgotinib 200 mg + lanraplenib placebo for additional 16 weeks. At Week 32, participants who do not achieve a ≥ 35% reduction in urinary protein excretion from Week 16 to Week 32 can continue whichever treatment that lead to the greatest reduction in urinary protein excretion, or either treatment per investigator's discretion for additional 20 weeks in Extended Blinded Treatment Phase.
Filgotinib 200 mg to Lanraplenib 30 mgEXPERIMENTALAt Week 16, participants who do not achieve a ≥ 35% reduction in urinary protein excretion from baseline to Week 16 switch treatment and receive lanraplenib 30 mg + filgotinib placebo for additional 16 weeks. At Week 32, participants who do not achieve a ≥ 35% reduction in urinary protein excretion from Week 16 to Week 32 can continue whichever treatment that lead to the greatest reduction in urinary protein excretion, or either treatment per investigator's discretion for additional 20 weeks in Extended Blinded Treatment Phase.
Sequence ABEXPERIMENTALParticipants will receive atorvastatin (ATV) 40 mg tablet on Day 1, followed by a washout period of 1 day, and then pravastatin (PRA) 40 mg + rosuvastatin (ROS) 10 mg tablets on Day 3 in Treatment A, Period 1. In Treatment B, Period 2 participants will receive filgotinib 200 mg tablet once daily for 11 days, with ATV 40 mg on Day 12 and PRA 40 mg + ROS 10 mg tablets on Day 14. Period 1 and Period 2 will be separated by a washout period of 3 days.
Sequence BAEXPERIMENTALParticipants will receive filgotinib 200 mg tablet once daily for 11 days, with ATV 40 mg on Day 6 and PRA 40 mg + ROS 10 mg tablets on Day 8 in Treatment B, Period 1. In Treatment A, Period 2 participants will receive ATV 40 mg tablet on Day 18, followed by a washout period of 1 day and PRA 40 mg + ROS 10 mg tablets on Day 20. Period 1 and Period 2 will be separated by a washout period of 6 days.
Moderate Hepatic ImpairmentEXPERIMENTALParticipants with moderate hepatic impairment and matched healthy controls will receive a single dose of filgotinib on Day 1.
Severe Hepatic ImpairmentEXPERIMENTALParticipants with severe hepatic impairment and matched healthy controls will receive a single dose of filgotinib on Day 1.
Mild Hepatic ImpairmentEXPERIMENTALParticipants with mild hepatic impairment and matched healthy controls will receive a single dose of filgotinib on Day 1.
Interventions
NameTypeDescription
FilgotinibDRUGTablet(s) administered orally once daily
Placebo to match filgotinibDRUGTablet(s) administered orally once daily
PlaceboDRUGTablet(s) administered orally once daily
PTM filgotinibDRUGTablet(s) administered orally once daily
AdalimumabDRUG40 mg administered via subcutaneous injection once every two weeks
Placebo to match adalimumabDRUGAdministered via subcutaneous injection once every two weeks
MTXDRUGCommercially sourced tablet(s) administered orally
Placebo to match MTXDRUGCapsule(s) administered orally once weekly
csDMARDsDRUGcsDMARDs may include one or two of the following: methotrexate (MTX), hydroxychloroquine or chloroquine, sulfasalazine, and/or leflunomide (combination of leflunomide and MTX is not allowed)
LanraplenibDRUG30 mg tablet administered orally once daily
Filgotinib placeboDRUGTablet administered orally once daily
Lanraplenib placeboDRUGTablet administered orally once daily
AtorvastatinDRUGAdministered as single dose tablet orally.
PravastatinDRUGAdministered as single dose tablet orally.
RosuvastatinDRUGAdministered as single dose tablet orally.
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Eligibility Criteria
Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites345

Key Inclusion Criteria: * Males or females who may benefit from filgotinib as judged by the investigator AND who completed a Gilead sponsored filgotinib parent study for RA as outlined below: * Have completed GS-US-417-0301, GS-US-417-0302 or GS-US-417-0303 on study drug * OR * Have compl...

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Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT02914535primaryCompletionDate: changed
LOWMay 24, 2026NCT02914535studyFirstPostDate: changed