ATRA
Ticker
Atara Biotherapeutics, Inc.
ATRA · Healthcare · Atara Biotherapeutics, Inc. engages in the development of transformative therapies for patients with cancer and autoimmune disease in the U…Atara Biotherapeutics, Inc. (ATRA), in the Healthcare sector, has 4 disclosed filings on Paydirt over the trailing twelve months from 3 corporate insiders: 2 purchases and 2 sales. Filers took a median of 3 days from execution to disclosure, and the most recent trade was executed Sep 4 and filed Sep 4. The most active filer was James Huang with 4 filings.
Add to watchlistFilings, ttm
4
2 buys · 2 sells
Traders, ttm
3
3 insiders
Volume, ttmiDollar value disclosed in the window
$9.4M
estimated for Congress, as filed for insiders
Median delay
3d
execution to disclosure
Last traded
Sep 4
Filed Sep 4
ADViAverage daily dollar volume
$642K
market data
Share price · 12M
$9.38 (-23.7%)
Adjusted for splits and dividends.
Volume by month
Buys $6.6M
Sells $3.7M
Estimated for Congress, as filed for insiders · by filing month · past 24 months
Who filed
JHRecent filings
Brian N CherryPURCHASE
Director
$1000K104,166 sh × $9.60
Exec Sep 4
Filed Sep 4 · 6:20 PM ET EcoR1 Capital, LLCPURCHASE 10% owner $4.7M
507,407 sh × $9.35
Exec May 7
Filed May 11 · 5:34 PM ET James HuangSALE Director $3.2M
313,446 sh × $10.10
Exec May 7
Filed May 11 · 5:30 PM ET James HuangSALE Director $489K
80,554 sh × $6.07
Exec Jan 12
Filed Jan 14 · 5:30 PM ET James HuangPURCHASE Director $670K
55,000 sh × $12.19
Exec Aug 15 2025
Filed Aug 19 2025 · 8:15 PM ET James HuangPURCHASE Director $186K
19,335 sh × $9.64
Exec Jul 17 2025
Filed Jul 21 2025 · 9:00 AM ET