Cherry Brian N
SEC insider (Form 3/4/5 filer). CIK 0001290922. Director at Atara Biotherapeutics, Inc. (ATRA) and 1 other issuer. 4 reported Form 4/5 transactions since Sep 2024; latest on Sep 4, 2026. Located in THOUSAND OAKS, CA.
Companies Cherry Brian N has filed insider reports for
- Atara Biotherapeutics, Inc. (ATRA): Director
- Zymeworks Inc. (ZYME): Director
Cherry Brian N
CIK: 0001290922
Transaction Breakdown
Open Market Buys (P)1 (25.0%)
High conviction signal
Open Market Sales (S)0 (0.0%)
Position reduction
Option Exercises (M)0 (0.0%)
Derivative conversions
Awards (A)3 (75.0%)
Compensation grants
Other (G, F, J, C, D, …)0 (0.0%)
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Discretionary Trading P&L
Holdings
Transaction History (4 total)
- Sep 4, 2026ATRA
Atara Biotherapeutics, Inc.
PurchaseDirect104.2K shares at avg. $9.60$1000K - Jun 11, 2026ATRA
Atara Biotherapeutics, Inc.
AwardDirect24K shares- - Jan 12, 2026ZYME
Zymeworks Inc.
AwardDirectStock Option (Right to Buy)
23K shares- - Jan 12, 2026ZYME
Zymeworks Inc.
AwardDirectRestricted Stock Unit
15.4K shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Sep 4, 2026 |  ATRA Atara Biotherapeutics, Inc. | Purchase | 104,166 | $9.60 | $999,994 | Direct |
| Jun 11, 2026 | ATRA Atara Biotherapeutics, Inc. | Award | 24,000 | - | $0 | Direct |
| Jan 12, 2026 |  ZYME Zymeworks Inc. | Award Stock Option (Right to Buy) | 23,000 | - | - | Direct |
| Jan 12, 2026 | ZYME Zymeworks Inc. | Award Restricted Stock Unit | 15,400 | - | - | Direct |
1-4 of 4 transactions