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sellModerate cluster of 3

AnhCo Nguyen sold $23k of ATRA

President and CEO at Atara Biotherapeutics, Inc.. 3,331 shares at an average of $7.00, traded Mar 3, 2025, filed Mar 5, 2025.

Warning score
40
Value
$23k
3,331 shares
Holdings after
74,123
-4% from before
From 52-week low
-
no price yet
From 52-week high
-
no price yet

Score components

  • Role
    CEO
    +25
  • Trade size
    $23k at market
    0
  • Share of holdings sold
    Sold 4.3% of holdings
    0
  • Cluster
    3 insiders selling within 14 days
    +15

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 Mar 5, 2025: +29.7%SPY +36.2% · excess -6.5%

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 0000905148-25-000865, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Mar 3, 2025SOpen-market sale
Common Stock
-3,331$7.00$23k74,123Mar 5, 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%
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%
23Weak
ATRAsell 2
Atara Biotherapeutics, Inc.
Yanina Grant-Huerta
Chief Accounting Officer
$21k
1,809 shares
-5%
39Weak
ATRAsell 2
Atara Biotherapeutics, Inc.
AnhCo Nguyen
President and CEO
$34k
2,958 shares
-4%
48Moderate
ATRAbuy
Atara Biotherapeutics, Inc.
James Huang
director, owner
$670k
55,000 shares
+4%
35Weak
ATRAbuy
Atara Biotherapeutics, Inc.
James Huang
director, owner
$186k
19,335 shares
+1%

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.

AnhCo Nguyen sold $23k of ATRA | InsiderTell