Atara Biotherapeutics

Closed portfolio with an early-phase archive tilt

According to ClinicalTrials.gov-derived indexes, Atara Biotherapeutics sits in the upper quartile of US sponsors by registered trial count (#2,411 of 15,742 sponsors by registered trial count).

5 total trials none currently recruiting 2 completed early-phase tilt upper quartile by trial count

Atara Biotherapeutics: 5 sponsored US clinical trials, none currently recruiting.

Atara Biotherapeutics sponsors 5 registered US clinical trials on ClinicalTrials.gov, none currently recruiting, and 2 completed. 0 of these trials are in Phase 3-4 (later-stage) and 5 in Phase 1-2 (earlier-stage). The most-studied condition in this pipeline is Transplant Patients With EBV Viremia at High Risk of Developing a Recurrent EBV Lymphoma, with 1 trials.

Upper-quartile sponsor footprint

Atara Biotherapeutics sits in the upper quartile of the sponsor corpus (#2,411 of 15,742 sponsors by registered trial count) - denser than most sponsors, still short of the top-decile hubs.

How the Atara Biotherapeutics early-phase archive is shaped

5 indexed studies, none listed as recruiting (0% open); 2 completed (40%).

Phase mix: 0 late (III/IV) vs 5 early (I/II) (early-phase heavy).

Top condition: Transplant Patients With EBV Viremia at High Risk of Developing a Recurrent EBV Lymphoma (1 trial), 2 others listed.

How to read a closed sponsor archive

When recruiting_count is zero, the indexed set is completed or otherwise not open. Phase tilt still describes where archived studies sat on the investigational pathway. Re-check ClinicalTrials.gov before acting.

Atara Biotherapeutics: archived-pipeline peers nationwide

Peers matched on 5 indexed studies with no current recruiting: volume and archive shape, not condition overlap.

Atara Biotherapeutics 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 051015 0%5%10%15%20%25% Total trials Recruiting share Atara Biotherapeutics4YouandMeAbbott Rapid DxAccess Business GroupAcera Surgical10xBio22nd Century Group23andMe3-C Institute for Social Development
Atara Biotherapeutics 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).

Atara Biotherapeutics 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 5 archived trials

Sponsors with similar archive density (± trial count)

What to do with this Atara Biotherapeutics page

5 registered trials is a research-attention snapshot, not an endorsement of Atara Biotherapeutics or any single study.

Trial and recruiting counts reflect ClinicalTrials.gov registry status as of the data vintage above; individual trial eligibility and enrollment status can change.

Atara Biotherapeutics pipeline card: 5 registered trials from official public datasets.Report a data error.