Atara Biotherapeutics, Inc. — insider transactions
7 transactions on record · ATRA · CIK 1604464
Aggregates
computed from the filings belowPurchases, 12m
1
count of open-market buys
Sales, 12m
6
count of open-market sales
Buy / sell ratio, 12m
0.17
purchases per sale
Distinct insiders, 12m
3
Bought, 3m
$1M
Sold, 3m
$40.9K
Median disclosure lag
2.0 d
trade date to filing date
Largest single trade, 24m
$1M
2026-09-04
Director share, 12m
100.0%
of transactions where role is stated
Current run
1 buys
consecutive same-direction transactions
Net 3m flow
$959.1K
purchases minus sales
Total on record
7
Transactions
7 most recent shown| Disclosed | Traded | Lag, d | Insider | Role | Transaction | Shares | Price | Value | Source |
|---|---|---|---|---|---|---|---|---|---|
| 2026-09-04 | 2026-09-04 | 0 | Cherry Brian N | Director | Open market purchase | 104,166 | $9.60 | $1M | filing |
| 2026-08-26 | 2026-08-17 | 9 | Nguyen AnhCo | Director, President and CEO | Open market sale | 5,062 | $8.08 | $40.9K | filing |
| 2026-07-24 | 2026-07-22 | 2 | Green Jeremy | Director | Exercise of derivative | 195,211 | — | — | filing |
| 2026-07-24 | 2026-07-22 | 2 | Green Jeremy | Director | Exercise of derivative | 101,089 | $0.00 | — | filing |
| 2026-07-24 | 2026-07-22 | 2 | Green Jeremy | Director | Exercise of derivative | 55,387 | $0.00 | — | filing |
| 2026-07-24 | 2026-07-22 | 2 | Green Jeremy | Director | Shares withheld for tax | 60 | — | — | filing |
| 2026-07-24 | 2026-07-22 | 2 | Green Jeremy | Director | Exercise of derivative | 38,735 | $0.00 | — | filing |