InsiderTrades

Cherry Brian N

SEC CIK 1290922 · EDGAR

Buying vs selling by month open-market trades, last 24 months, ATRA
BoughtSold

Companies

TickerCompanyTitleHoldingBoughtSoldTradesFirstLast
ATRAAtara Biotherapeutics, Inc.Dir 166.5K $1000.0K — 22026-06-112026-09-04

Most active insiders at ATRA, 12 months

#InsiderTitleBoughtSold
1 EcoR1 Capital, LLC10% $4.74M—
2 Panacea Innovation Ltd10% —$3.17M
3 Cherry Brian NDir $1000.0K—
4 Huang JamesDir, 10% —$489.0K
5 Nguyen AnhCoPres, CEO, Dir —$142.4K
6 Grant-Huerta YaninaCAO —$56.5K
7 Ciongoli Gregory AustinDir, 10%, See Remarks ——
8 Redmile Group, LLCDir ——
9 Fust Matthew KDir ——
10 HEIDEN WILLIAM KDir ——

Transactions 2

Type
Reset
X Filed Traded Ticker Company Insider Title Type Price Qty Owned ΔOwn Value
2026-09-04 18:20 2026-09-04 ATRA Atara Biotherapeutics, Inc. Cherry Brian N Dir P - Purchase $9.60 +104.2K 166.5K +167% +$1000.0K
2026-06-15 18:51 2026-06-11 ATRA Atara Biotherapeutics, Inc. Cherry Brian N Dir A - Grant $0.00 +24.0K 62.3K +63% $0

Purchase Sale Sale after option exercise All abbreviations