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sellWeak cluster of 2

Yanina Grant-Huerta sold $21k of ATRA

Chief Accounting Officer at Atara Biotherapeutics, Inc.. 1,809 shares at an average of $11.61, traded Aug 18, 2025, filed Aug 20, 2025.

Warning score
23
Value
$21k
1,809 shares
Holdings after
35,258
-5% from before
From 52-week low
+117%
low $5.30, close $11.48
From 52-week high
-36%
high $18.00, as of Aug 18, 2025

Score components

  • Role
    Officer
    +15
  • Trade size
    $21k at market
    0
  • Share of holdings sold
    Sold 4.9% of holdings
    0
  • Cluster
    2 insiders selling within 14 days
    +8

What happened after comparable sells

Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.

Price around the trade, and since

From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.

ATRAOct 9, 2026 · close 9.48
Since filing Aug 20, 2025: -19.4%SPY +23.7% · excess -43.1%

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™

Rows in this filing

Every transaction in Form 4 0000905148-25-003069, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Aug 18, 2025SOpen-market sale
Common Stock
-55$11.61$63937,012Aug 20, 2025
Aug 18, 2025SOpen-market sale
Common Stock
-86$11.61$99936,926Aug 20, 2025
Aug 18, 2025SOpen-market sale
Common Stock
-1,668$11.61$19k35,258Aug 20, 2025

Related signals

Other insiders at Atara Biotherapeutics, Inc. and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
50Moderate
ATRAbuy
Atara Biotherapeutics, Inc.
Brian N Cherry
director
$1000k
104,166 shares
+167%
30Weak
ATRAsell 3
Atara Biotherapeutics, Inc.
Yanina Grant-Huerta
Chief Accounting Officer
$22k
2,414 shares
-5%
47Moderate
ATRAsell 3
Atara Biotherapeutics, Inc.
AnhCo Nguyen
President and CEO
$48k
5,241 shares
-4%
46Moderate
ATRAbuy
Atara Biotherapeutics, Inc.
EcoR1 Capital, LLC
owner
$4.7M
507,407 shares
+49%
60Notable
ATRAsell 3
Atara Biotherapeutics, Inc.
James Huang
director, owner
$3.2M
313,446 shares
-24%
33Weak
ATRAsell 2
Atara Biotherapeutics, Inc.
AnhCo Nguyen
President and CEO
$15k
2,996 shares
-5%
23Weak
ATRAsell 2
Atara Biotherapeutics, Inc.
Yanina Grant-Huerta
Chief Accounting Officer
$11k
2,104 shares
-6%
33Weak
ATRAsell
Atara Biotherapeutics, Inc.
James Huang
director, owner
$489k
80,554 shares
-6%
23Weak
ATRAsell 2
Atara Biotherapeutics, Inc.
Yanina Grant-Huerta
Chief Accounting Officer
$24k
1,804 shares
-5%
39Weak
ATRAsell 2
Atara Biotherapeutics, Inc.
AnhCo Nguyen
President and CEO
$38k
2,915 shares
-4%

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.

Yanina Grant-Huerta sold $21k of ATRA | InsiderTell