Study to Evaluate the Safety and Efficacy of Teropavimab and Zinlirvimab in Combination With Lenacapavir in Virologically Suppressed Adults With HIV-1 Infection

Key Inclusion Criteria

• On first-line antiretroviral therapy (ART) for ≥ 2 years prior to screening. A change in ART regimen ≥ 28 days prior to screening for reasons other than virologic failure (VF) (eg, tolerability, simplification, drug-drug interaction profile) is allowed
• No documented historical resistance to the current ART regimen
• Plasma HIV-1 RNA < 50 copies/mL at screening
• Documented plasma HIV-1 RNA < 50 copies/mL for ≥ 18 months preceding the screening visit (or undetectable HIV-1 RNA level according to the local assay being used if the limit of detection is ≥ 50 copies/mL). Unconfirmed virologic elevations of ≥ 50 copies/mL (transient detectable viremia, or "blip") prior to screening are acceptable.
• Proviral phenotypic sensitivity to both teropavimab and zinlirvimab at screening by the PhenoSense mAb Assay (Monogram Biosciences) for inclusion in the Primary Cohort; sensitivity at screening by the PhenoSense mAb Assay (Monogram Biosciences) to 1 mAb, either teropavimab or zinlirvimab, within 18 months prior to enrollment for inclusion in the optional Pilot Cohort

-- In both cohorts, teropavimab sensitivity is defined as 90% inhibitory concentration (IC90) ≤ 2 μg/mL; zinlirvimab sensitivity is defined as IC90 ≤ 2 μg/mL;

• Cluster determinant 4+ (CD4+) count nadir ≥ 350 cells/μL
• Screening CD4+ count ≥ 500 cells/μL
• Availability of a fully active alternative ART regimen, in the opinion of the investigator, in the event of discontinuation of the current ART regimen with development of resistance

Key Exclusion Criteria

• Comorbid condition requiring ongoing immunosuppression
• Evidence of current hepatitis B virus (HBV) infection
• Evidence of current hepatitis C virus (HCV) infection (prior infection cleared spontaneously or with treatment is acceptable)
• History of opportunistic infection or illness indicative of Stage 3 HIV disease

Note: Other protocol defined Inclusion/Exclusion criteria may apply.