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ATV

Phase 2

Acquired Immune Deficiency Syndrome (AIDS) | Small molecule | Infectious Disease |Gilead Sciences, Inc.|Last Updated: Apr 21, 2026

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment133
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT02016924Study of Cobicistat-Boosted Atazanavir (ATV/co), Cobicistat-Boosted Darunavir (DRV/co) and Emtricitabine/Tenofovir Alafenamide (F/TAF) in Children With HIVPHASE2 ACTIVE NOT_RECRUITING 133Jan 16, 2014Mar 1, 2027Apr 21, 202623 United States, Argentina +5
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Study Endpoints
Primary Endpoints
Pharmacokinetic (PK) Parameter: AUCtau of ATV, DRV, TAF, and TFV
Predose on Day 1, and postdose up to Week 48

AUCtau is defined as concentration of drug over time (the area under the concentration verses time curve over the dosing interval). AUCtau for ATV (Cohorts 1 Part A, 2, 3, and 4 \[Groups 2 to 4\]); DRV (Cohorts 1 Part A, 2, and 3); TAF (Cohorts 2, 3, 4 \[Groups 1 to 4\] and 5 \[Groups 1 to 3\] taking F/TAF); and TFV (Cohorts 2, 3, 4 \[Groups 1 to 4\] and 5 \[Groups 1 to 3\] taking F/TAF) will be reported.

Percentage of Participants Experiencing Treatment Emergent Adverse Events (AEs) Through Week 24
First dose date up to Week 24 plus 30 days (Cumulative data through Week 24)
Percentage of Participants Experiencing Treatment Emergent Laboratory Abnormalities Through Week 24
First dose date up to Week 24 plus 30 days (Cumulative data through Week 24)
Secondary Endpoints
PK Parameter: Ctau of ATV, DRV, COBI, FTC and TFV
Predose on Day 1, and postdose up to Week 48
PK Parameter: Cmax of ATV, DRV, COBI, TAF, FTC and TFV
Predose on Day 1, and postdose up to Week 48
PK Parameter: CL/F of ATV, DRV, COBI, TAF, FTC and TFV
Predose on Day 1, and postdose up to Week 48
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Study Design & Arms
AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Cohort 1: Part A and Part BEXPERIMENTALParticipants ages 12 to \<18 years old will receive cobicistat 150 mg with either ATV or DRV plus background regimen (BR). The BR may contain additional antiretroviral agents except for the following disallowed agents: saquinavir, indinavir, nelfinavir, double protease inhibitor (PI) regimens, raltegravir, elvitegravir, efavirenz, nevirapine, delavirdine, maraviroc, etravirine, rilpivirine, dolutegravir, and investigational antiretroviral agents.
Cohort 2EXPERIMENTALParticipants aged 6 to \<12 years old and ≥25 to \<40kg will receive cobicistat 150 mg and F/TAF 200/25 mg with either ATV or DRV.
Cohort 3EXPERIMENTALParticipants age ≥ 2 years old will receive cobicistat 90 mg and F/TAF 120/15 mg with either ATV or DRV.
Cohort 4 (Group 1)EXPERIMENTALParticipants age ≥ 4 weeks old weighing 14 to \< 25 kg will receive cobicistat tablet for oral suspension (TOS) 90 mg, once daily and F/TAF TOS 120/15 mg, once daily with either ATV or DRV or lopinavir boosted by ritonavir (LPV/r). Minimum age and weight for ATV is ≥ 3 months and ≥ 5 kg, minimum age and weight for DRV is ≥ 3 years and ≥ 15 kg; participants receiving LPV/r will not receive cobicistat TOS.
Cohort 4 (Group 2)EXPERIMENTALParticipants age ≥ 4 weeks old weighing 10 to \< 14 kg will receive cobicistat TOS 30 mg (twice daily) and F/TAF TOS 60/7.5 mg, once daily with either ATV or LPV/r. Minimum age and weight for ATV is ≥ 3 months and ≥ 5 kg, respectively; participants receiving LPV/r will not receive cobicistat TOS.
Cohort 4 (Group 3)EXPERIMENTALParticipants age ≥ 4 weeks old weighing 6 to \< 10 kg will receive cobicistat TOS 30 mg (twice daily) and F/TAF TOS 30/3.75 mg, once daily with either ATV or LPV/r. Minimum age and weight for ATV is ≥ 3 months and ≥ 5 kg, respectively; participants receiving LPV/r will not receive cobicistat TOS.
Cohort 4 (Group 4)EXPERIMENTALParticipants age ≥ 4 weeks old weighing 3 to \< 6 kg will receive cobicistat TOS 30 mg (twice daily) and F/TAF TOS 15/1.88 mg, once daily with either ATV or LPV/r. Minimum age and weight for ATV is ≥ 3 months and ≥ 5 kg, respectively; participants receiving LPV/r will not receive cobicistat TOS.
Cohort 5 (Group 1)EXPERIMENTALParticipants ages ≥ 4 weeks old weighing ≥ 10 to \< 14 kg will receive F/TAF TOS 60/7.5 mg, once daily with the third unboosted drug.
Cohort 5 (Group 2)EXPERIMENTALParticipants ages ≥ 4 weeks old weighing ≥ 6 to \< 10 kg will receive F/TAF TOS 30/3.75 mg, once daily with the third unboosted drug.
Cohort 5 (Group 3)EXPERIMENTALParticipants ages ≥ 4 weeks old weighing ≥ 3 to \< 6 kg will receive F/TAF TOS 15/1.88 mg, once daily with the third unboosted drug.
Interventions
NameTypeDescription
ATVDRUGCapsules administered once daily according to dosing recommendations per product monograph
DRVDRUGTablets administered once daily according to dosing recommendations per product monograph
CobicistatDRUGTablets administered orally once daily with food
BRDRUGBackground Regimen (BR) include Food and Drug Administration (FDA)-approved nucleos(t)ide reverse transcriptase inhibitors (NRTIs) including zidovudine (ZDV), stavudine (d4T), didanosine (ddI), abacavir (ABC), tenofovir disoproxil fumarate (TDF), tenofovir alafenamide (TAF), lamivudine (3TC), and emtricitabine (FTC).
F/TAFDRUGTablets administered orally once daily
LPV/rDRUGSolution administered orally
Third Unboosted DrugDRUGATV (administered orally), DRV (administered orally), and LPV/r (administered orally) would be general list but unspecified for sites.
Cobicistat TOSDRUGTablets for oral suspension
F/TAF TOSDRUGTablets for oral suspension
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Eligibility Criteria
Age Range4 Weeks — 17 Years
SexALL
Healthy VolunteersNo
Study Sites23

Key Inclusion Criteria: * HIV-1 infected, virologically suppressed males and females age ≥ 4 weeks to \< 18 years (according to requirements of enrolling Cohort). * Body weight at screening ≥ 25 to \< 40 kg (Cohort 2); ≥ 14 to \< 25 kg (Cohort 3); ≥ 3 to \< 25 kg (Cohort 4); ≥ 3 to \< 14 kg (Cohort...

Countries:United StatesArgentinaSouth AfricaThailandUgandaUnited KingdomZimbabwe
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Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT02016924primaryCompletionDate: changed
LOWMay 24, 2026NCT02016924studyFirstPostDate: changed