Brian N Cherry bought $1000k of ATRA
director at Atara Biotherapeutics, Inc.. 104,166 shares at an average of $9.60, traded Sep 4, 2026, filed Sep 4, 2026.
Score components
- +15RoleDirector
- +25Trade size$1000k at market
- +10Relative to holdingsHoldings up 167%
- 0Price contextNo price history yet
- 0ClusterNo other insider buying within 14 days
- 0Repeat buyingFirst buy in 90 days
- 0Track recordToo few past buys to judge (0 with prices)
What happened after comparable buys
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.
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 0000905148-26-004085, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Sep 4, 2026 | POpen-market purchase Common Stock | +104,166 | $9.60 | $1000k | 166,486 | 38 d ago |
Related signals
Other insiders at Atara Biotherapeutics, Inc. and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 23Weak | Atara Biotherapeutics, Inc. | Yanina Grant-Huerta Chief Accounting Officer | $24k 1,804 shares | -5% | |
| 39Weak | Atara Biotherapeutics, Inc. | AnhCo Nguyen President and CEO | $38k 2,915 shares | -4% | |
| 23Weak | Atara Biotherapeutics, Inc. | Yanina Grant-Huerta Chief Accounting Officer | $21k 1,809 shares | -5% | |
| 39Weak | 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% | |
| 33Weak | Atara Biotherapeutics, Inc. | AnhCo Nguyen President and CEO | $22k 3,276 shares | -4% | |
| 23Weak | Atara Biotherapeutics, Inc. | Yanina Grant-Huerta Chief Accounting Officer | $15k 2,218 shares | -6% | |
| 30Weak | Atara Biotherapeutics, Inc. | Jill Henrich EVP, Chief Regulatory Officer | $7,410 1,059 shares | -5% | |
| 37Weak | Atara Biotherapeutics, Inc. | Eric J Hyllengren EVP, CFO and COO | $8,473 1,211 shares | -2% |
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.