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ATRA

INSIDER BUYINSIDER SELL

Atara Biotherapeutics, Inc.

Research: Finviz ↗·Perplexity ↗

No convergence signal this quarter — shown because tracked funds have filed 13D/G on this stock.

Days to cover (short int.)
8.1d↓-20.4%
as of 2026-09-30

News Summary

Negative

Atara faced a second FDA Complete Response Letter for tabelecleucel in 2026 due to unresolved GMP compliance issues, triggering a BLA resubmission in September 2026 via Pierre Fabre and resetting the regulatory timeline. The company is burning through minimal cash (~$9.9M, sufficient only to mid-2027), faces active securities fraud litigation tied to alleged misleading statements about the drug and manufacturing defects, and has seen analyst downgrades with price targets cut by over 50% amid deteriorating share price momentum.

Red flags

  • •Second FDA Complete Response Letter for lead candidate (manufacturing/GMP compliance unresolved)
  • •Revenue collapsed 97% YoY ($0.6M vs $17.6M) despite cost cuts
  • •Cash position of $9.9M funds operations only to mid-2027 with no approved product revenue
  • •Securities fraud class action ongoing (May 2024–Jan 2026 class period) alleging misstatements on approval likelihood and manufacturing issues
  • •Additional shareholder litigation investigations announced (October 2026)
  • •Analyst downgrades and 50%+ price target cuts
  • •Stock trading below 50-day moving average ($8.82 vs $9.12 MA) in early October 2026
  • •Board refresh focused on 'capital allocation and strategic acquisitions' signals potential M&A/restructuring necessity

Insider Activity

NameTitleTypeSharesPriceValueFiledSrc
Cherry Brian N—BUY104K$9.60$1.00M2026-09-04↗
Nguyen AnhCoPresident and CEOSELL5K$8.08$0.04M2026-08-17↗

Fund 13D/13G Filings (2)

Tracked funds' beneficial-ownership filings on this stock — disclosed within days of a position change, fresher than the quarterly 13F. Since Filing compares the stock to SPY from the filing date (shown for filings within the last 90 days).

FundForm∆ Shares% of ClassSince FilingFiledSrc
Point72SC 13G/A+161K7.6%
+15.5% vs SPY
+15.9% abs
2026-08-14↗
Point72SC 13GNEW6.2%
-5.5% vs SPY
-1.1% abs
2026-05-08↗