A leader in the discovery of oral direct-acting antiviral therapies.

Derived from Atea’s nucleos(t)ide prodrug platform, bemnifosbuvir (AT-527) is an oral direct-acting antiviral, which is in Phase 2 development for the treatment of COVID-19. Its unique mechanism of action, with dual targets including chain termination (RdRp) and NiRAN inhibition, has the potential to create a high barrier to resistance with broad antiviral coverage to different variants of SARS-CoV-2.

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Innovative discovery and efficient development of potentially transformative therapies for patients with life-threatening viral diseases.

Atea is a clinical stage biopharmaceutical company working to address unmet medical needs with innovative oral antiviral therapies.


The power of our purine nucleotide prodrug platform.

Leveraging our platform, we have discovered and are rapidly advancing novel oral direct-acting antiviral drug candidates. Utilizing unique chemical modifications, these product candidates are designed to have the potential for enhanced antiviral activity and selectivity.

A network of hubs and spokes is suspended, representing the idea of a modular platform.


Bemnifosbuvir addresses the key challenges of the COVID-19 pandemic and beyond.

For the treatment of COVID-19, we need transformational solutions, and we believe that oral, safe, direct-acting antivirals can play an essential role worldwide. The value and global health impact of a direct-acting antiviral is to rapidly inhibit viral replication in the early phase of infection, which has the effect of reducing disease progression and curtailing the spread of infection.

While vaccines will play an important role in mitigating the COVID-19 pandemic, we will need treatment options to stay ahead of the virus.

Bemnifosbuvir is an oral, direct-acting antiviral drug candidate that is being evaluated for COVID-19.

Similar to Tamiflu®

Complementary medical intervention to vaccination

Significant advantages vs antibodies

Oral administration has significant advantages:

  • convenient for patients and healthcare workers
  • global reach
  • manufacture
  • scale-up
  • cost
Effective vs. mutations

Highly-conserved target has potential to enable antiviral activity in the presence of multiple variants

anticipated to be effective again st future coronaviruses

Antiviral activity against potential future coronaviruses beyond SARS-CoV-2 anticipated


Follow our progress.

See updates on bemnifosbuvir, other Atea product candidates and company news.

Atea Pharmaceuticals to Present at the 2022 Jefferies Healthcare Conference

BOSTON, June 01, 2022 (GLOBE NEWSWIRE) -- Atea Pharmaceuticals, Inc. (Nasdaq: AVIR) (“Atea”), a clinical-stage biopharmaceutical company, today announced that Jean-Pierre Sommadossi, PhD, Chief Executive Officer and Founder of Atea Pharmaceuticals, will present a corporate overview and update at

Atea Pharmaceuticals Reports First Quarter 2022 Financial Results and Provides Business Update

New clinical results from MORNINGSKY trial shows 71% reduction in hospitalization (secondary endpoint) in broad patient population with COVID-19 treated with bemnifosbuvir (AT-527) versus placebo (p=0.047, unadjusted, exploratory) New clinical results from final analysis of Phase 2 hospitalized

Atea Pharmaceuticals to Host First Quarter 2022 Financial Results Conference Call on May 10, 2022

BOSTON, May 03, 2022 (GLOBE NEWSWIRE) -- Atea Pharmaceuticals, Inc. (Nasdaq: AVIR) (“Atea”), a clinical-stage biopharmaceutical company, today announced that it will host a live conference call and audio webcast on Tuesday, May 10, 2022, at 8:00 a.m. ET to report financial results for the first