Insider · CIK 0001214939
William K Heiden
Files at: ATRA, AMAG. On EDGAR ↗
Reported trades — common stock
| Trade | Reported (ET) | Company | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Jun 9, 2026 AForm 4 → | Jun 11, 4:37 pm EDT | Atara Biotherapeutics, Inc.ATRA | 12,000 | — | — | 34,188 | — |
Reported trades — derivatives (options, RSUs, warrants)
No reported derivative activity in this period.