Stocks · Health care · Biological Products, (No Diagnostic Substances)

Atara Biotherapeutics, Inc.

ATRA Clue Score62
United States Fiscal year ends December CIK 0001604464 Results filed 12 Aug 2026

What the insiders did No buying or selling

By person

16 insiders · 0 transactions
Insider
Role
Bought
Sold
Net
Holding
Worth
Change
EcoR1 Capital, LLC entity
10% owner
—
—
—
1,552,000
$14.90M
+48.6%
Adiumentum Capital Fund I LP entity
Director
—
—
—
1,209,395
$11.61M
+6.7%
Panacea Innovation Ltd entity
10% owner
—
—
—
1,011,000
$9.71M
−1.2%
Redmile Group, LLC entity
Director
—
—
—
636,852
$6.11M
+44.2%
Brian N Cherry
Director
—
—
—
166,486
$1.60M
+334.5%
AnhCo Nguyen
President and CEO
—
—
—
132,775
$1.27M
+67.8%
Pascal Touchon
Director
—
—
—
77,955
$748.37K
+11.2%
Eric J Hyllengren
Former EVP, CFO & COO
—
—
—
56,231
$539.82K
+127.1%
Yanina Grant-Huerta
Chief Accounting Officer
—
—
—
49,636
$476.51K
+25.1%
William K Heiden
Director
—
—
—
34,188
$328.20K
+138.1%
Carol Giltner Gallagher
Director
—
—
—
33,012
$316.92K
+31.1%
Matthew K Fust
Director
—
—
—
30,188
$289.80K
+191.4%
Jill Henrich
EVP, Chief Regulatory Officer
—
—
—
18,679
$179.32K
−9.9%
Maria Grazia Roncarolo
Director
—
—
—
17,368
$166.73K
+82.1%
Ameet Mallik
Director
—
—
—
16,928
$162.51K
+86.0%
Gregory Austin Ciongoli
Director
—
—
—
12,000
$115.20K
—

No percentages here. These insiders hold more than one class of share between them, and the share count on file covers one of them rather than all. Dividing the two would compare different things.