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Home/Companies/Atara Biotherapeutics, Inc.

Atara Biotherapeutics, Inc.

50 insider trades tracked

ATRA
Insider trades
50
Bought (open market)
$6.6M
Sold (open market)
$3.9M
Unique insiders
11

12-month activity

Monthly insider buy vs sell totals for Atara Biotherapeutics, Inc..

BuysSellsFilings with no price (gifts, grants)
Show data table
MonthBuysSellsFilings
October 2025$0$00
November 2025$0$62K7
December 2025$0$00
January 2026$0$489K1
February 2026$0$00
March 2026$0$26K12
April 2026$0$00
May 2026$4.7M$3.2M4
June 2026$0$04
July 2026$0$05
August 2026$0$41K1
September 2026$1000K$01

Recent insider trades

Most recent Form 4 filings for Atara Biotherapeutics, Inc..

  • Cherry Brian Nbought104,166 shares ofATRAat $9.6$1000KSep 4Details
  • Nguyen AnhCosold5,062 shares ofATRAat $8.076$41KAug 17 · filed Aug 26Details
  • Redmile Group, LLCexercised55,387 shares ofATRAat $0Jul 22 · filed Jul 24Details

Insiders at this company

Executives and directors who have filed Form 4s.

  • Nguyen AnhCo14 trades
  • Grant-Huerta Yanina12 trades
  • Panacea Innovation Ltd8 trades
  • Redmile Group, LLC5 trades
  • Hyllengren Eric J3 trades
  • Henrich Jill2 trades
  • Cherry Brian N2 trades
  • EcoR1 Capital, LLC1 trades

Explore insider screeners

Latest CEO & CFO PurchasesLatest CEO & CFO SalesDirector PurchasesOfficer PurchasesTop Purchases This WeekTop Sales This WeekTop Officer Buys (Month)10% Owner Filings10b5-1 Planned TradesDiscretionary TradesBuy/Sell RatiosPolitician-Insider Overlap
  • Redmile Group, LLCexercised38,735 shares ofATRAat $0Jul 22 · filed Jul 24Details
  • Redmile Group, LLCexercised101,089 shares ofATRAat $0Jul 22 · filed Jul 24Details
  • Redmile Group, LLCtax-withheld60 shares ofATRAJul 22 · filed Jul 24Details
  • Redmile Group, LLCexercised195,211 shares ofATRAJul 22 · filed Jul 24Details
  • Cherry Brian Ngranted24,000 shares ofATRAat $0Jun 11 · filed Jun 15Details
  • Ciongoli Gregory Austingranted12,000 shares ofATRAat $0Jun 9 · filed Jun 11Details
  • Fust Matthew Kgranted12,000 shares ofATRAat $0Jun 9 · filed Jun 11Details
  • HEIDEN WILLIAM Kgranted12,000 shares ofATRAat $0Jun 9 · filed Jun 11Details
  • Nguyen AnhCosold5,241 shares ofATRAat $9.129$48KMay 18 · filed May 20Details
  • Grant-Huerta Yaninasold2,414 shares ofATRAat $9.129$22KMay 18 · filed May 20Details
  • EcoR1 Capital, LLCbought507,407 shares ofATRAat $9.35$4.7MMay 7 · filed May 11Details
  • Panacea Innovation Ltdsold313,446 shares ofATRAat $10.098$3.2MMay 7 · filed May 11Details
  • Panacea Innovation Ltdtax-withheld5 shares ofATRAat $5.23$26Mar 17 · filed Mar 19Details
  • Panacea Innovation Ltdexercised259,163 shares ofATRAat $0$26Mar 17 · filed Mar 19Details
  • Nguyen AnhCogranted81,100 shares ofATRAat $0Mar 9 · filed Mar 11Details
  • Grant-Huerta Yaninagranted20,300 shares ofATRAat $0Mar 9 · filed Mar 11Details
  • Grant-Huerta Yaninasold100 shares ofATRAat $5.083$508Mar 2 · filed Mar 4Details
  • Grant-Huerta Yaninasold377 shares ofATRAat $5.082$2KMar 2 · filed Mar 4Details
  • Grant-Huerta Yaninasold1,603 shares ofATRAat $5.081$8KMar 2 · filed Mar 4Details
  • Grant-Huerta Yaninasold24 shares ofATRAat $5.077$122Mar 2 · filed Mar 4Details
  • Nguyen AnhCosold1,442 shares ofATRAat $5.087$7KMar 2 · filed Mar 4Details
  • Nguyen AnhCosold1,298 shares ofATRAat $5.086$7KMar 2 · filed Mar 4Details
  • Nguyen AnhCosold58 shares ofATRAat $5.08$295Mar 2 · filed Mar 4Details
  • Nguyen AnhCosold198 shares ofATRAat $5.079$1KMar 2 · filed Mar 4Details
  • Panacea Innovation Ltdsold80,554 shares ofATRAat $6.071$489KJan 12 · filed Jan 14Details
  • Panacea Innovation Ltdtax-withheld1 shares ofATRAat $14.03$14Nov 28, 2025 · filed Dec 1, 2025Details
  • Panacea Innovation Ltdexercised48,737 shares ofATRAat $0$5Nov 28, 2025 · filed Dec 1, 2025Details
  • View all trades for ATRA →
    HEIDEN WILLIAM K
    1 trades
  • Fust Matthew K1 trades
  • Ciongoli Gregory Austin1 trades