Atara Biotherapeutics, Inc. (ATRA) — Insider Trading
Insider trading activity for Atara Biotherapeutics, Inc. sourced from SEC EDGAR Form 4 filings.
Overview
- Total insider trades: 13
- Last trade date: Aug 17, 2026
- Ticker: ATRA
Top Insiders
- HEIDEN WILLIAM K — 1 trades, buy: $0, sell: $0
- Ciongoli Gregory Austin — 1 trades, buy: $0, sell: $0
- Cherry Brian N — 1 trades, buy: $0, sell: $0
- Fust Matthew K — 1 trades, buy: $0, sell: $0
- Panacea Innovation Ltd — 4 trades, buy: $0, sell: $3.2M
Recent Trades
| Date | Insider | Ticker / Company |
Type | Shares | Value |
| Aug 17, 2026 |
Nguyen AnhCo |
AATRA AATRA |
SELL |
5,062 |
$41K |
| Aug 17, 2026 |
Nguyen AnhCo |
AATRA AATRA |
SELL |
5,062 |
$42K |
| Jun 11, 2026 |
Cherry Brian N |
ATRA Atara Biotherapeutics, Inc. |
OTHER |
24,000 |
N/A |
| Jun 9, 2026 |
Ciongoli Gregory Austin |
ATRA Atara Biotherapeutics, Inc. |
OTHER |
12,000 |
N/A |
| Jun 9, 2026 |
Fust Matthew K |
ATRA Atara Biotherapeutics, Inc. |
OTHER |
12,000 |
N/A |
| Jun 9, 2026 |
HEIDEN WILLIAM K |
ATRA Atara Biotherapeutics, Inc. |
OTHER |
12,000 |
N/A |
| May 18, 2026 |
Grant-Huerta Yanina |
ATRA Atara Biotherapeutics, Inc. |
SELL |
2,414 |
$22K |
| May 18, 2026 |
Nguyen AnhCo |
ATRA Atara Biotherapeutics, Inc. |
SELL |
5,241 |
$48K |
| May 7, 2026 |
EcoR1 Capital, LLC |
ATRA Atara Biotherapeutics, Inc. |
BUY |
507,407 |
$4.7M |
| May 7, 2026 |
Panacea Innovation Ltd |
ATRA Atara Biotherapeutics, Inc. |
SELL |
313,446 |
$3.2M |
| Mar 17, 2026 |
Panacea Innovation Ltd |
ATRA Atara Biotherapeutics, Inc. |
OTHER |
259,163 |
$1.7M |
| Mar 17, 2026 |
Panacea Innovation Ltd |
ATRA Atara Biotherapeutics, Inc. |
OTHER |
5 |
$26 |
| Mar 17, 2026 |
Panacea Innovation Ltd |
ATRA Atara Biotherapeutics, Inc. |
OTHER |
259,163 |
$26 |
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