AnhCo Nguyen insider trades: Atara Biotherapeutics (ATRA) stock sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where AnhCo reports to the SEC
Open-market buys and sales
13 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Aug 17, 2026 | ATRA | ↓ Sell | 5,062 | $8.08 | $41K | Direct | Aug 26, 2026 (9d) |
| May 18, 2026 | ATRA | ↓ Sell | 5,241 | $9.13 | $48K | Direct | May 20, 2026 (2d) |
| Mar 2, 2026 | ATRA | ↓ Sell | 2,996 | $5.09 | $15K | Direct | Mar 4, 2026 (2d) |
| Nov 17, 2025 | ATRA | ↓ Sell | 2,915 | $13.19 | $38K | Direct | Nov 19, 2025 (2d) |
| Aug 18, 2025 | ATRA | ↓ Sell | 2,958 | $11.62 | $34K | Direct | Aug 20, 2025 (2d) |
| May 16, 2025 | ATRA | ↓ Sell | 3,276 | $6.76 | $22K | Direct | May 20, 2025 (4d) |
| Mar 3, 2025 | ATRA | ↓ Sell | 3,331 | $7.00 | $23K | Direct | Mar 5, 2025 (2d) |
| Nov 18, 2024 | ATRA | ↓ Sell | 1,664 | $11.20 | $19K | Direct | Nov 20, 2024 (2d) |
| Aug 16, 2024 | ATRA | ↓ Sell | 1,821 | $6.63 | $12K | Direct | Aug 20, 2024 (4d) |
| May 16, 2024 | ATRA | ↓ Sell | 42,899 | $0.62 | $26K | Direct | May 20, 2024 (4d) |
| Mar 4, 2024 | ATRA | ↓ Sell | 10,746 | $0.72 | $8K | Direct | Mar 6, 2024 (2d) |
| Nov 16, 2023 | ATRA | ↓ Sell | 8,856 | $0.39 | $3K | Direct | Nov 20, 2023 (4d) |
| Aug 16, 2023 | ATRA | ↓ Sell | 15,126 | $1.65 | $25K | Direct | Aug 18, 2023 (2d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other ATRA insiders
Open-market trades in the last 12 months
About AnhCo Nguyen's insider trades
AnhCo Nguyen is President and CEO at Atara Biotherapeutics (ATRA). Since Aug 16, 2023, AnhCo has reported no open-market purchases and 13 sales worth $316K on SEC Form 4. In the last 12 months: 4 sales ($142K).
Their filings also include grants and awards (3 filings). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every ATRA insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.