Insider tradingForm 4
Atara Biotherapeutics, Inc. (ATRA) Insider Trading
2 open-market trades reported since Aug 26, 2026: 1 purchases worth $1000K and 1 sales worth $41K.
By insider
| Insider | Role | Buys | Bought | Sells | Sold |
|---|---|---|---|---|---|
| Brian N. Cherry | Director | 1 | $1000K | 0 | $0 |
| Anhco Nguyen | CEO | 0 | $0 | 1 | $41K |
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All trades
| Filed | Insider | Type | Value | 3 mo. after |
|---|---|---|---|---|
| Sep 4 | Brian N. CherryDirector | ▲ BUY | $1000K | |
| Aug 26 | Anhco NguyenCEO | ▼ SELL | $41K |
Source: SEC Form 4 filings, retrieved Oct 28, 2026. How we read filings