Insider · CIK 0001290922

Cherry Brian N

Reports to the SEC for 3 companies · THOUSAND OAKS, CA

Transactions

Companies

Filings

CIK

0001290922

Forms 4 and 5

Insider transactions

4 trades

Date	Company	Role	Code	Shares	Price	Value	Shares after
2026-09-04	ATRAAtara Biotherapeutics, Inc.P Purchase	Director	PPurchase	+104K sh	$9.60	+$1M	166,486
2026-06-11	ATRAAtara Biotherapeutics, Inc.A Award	Director	AAward	+24K sh	—	—	62,320
2026-01-12	ZYMEZymeworks Inc. · Stock Option (Right to Buy)A Award	Director	AAward	+23K sh	—	—	23,000
2026-01-12	ZYMEZymeworks Inc. · Restricted Stock UnitA Award	Director	AAward	+15.4K sh	—	—	15,400

C/O ATARA BIOTHERAPEUTICS, INC. 1280 RANCHO CONEJO BOULEVARD

THOUSAND OAKS, CA, 91320