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Atara Biotherapeutics, Inc.

ATRA Net buying
CIK 0001604464 #4357 in the set updated 17 Sep 2026
Bought (1 mo)
$999.99K
out of their own pocket, the only kind of buying there is
Sold (1 mo)
$40.88K
$0.00 on a plan · $0.00 straight out of an exercise
Sold at will
$40.88K
1 of 1 sales
Net
+$959.11K
+$959.11K against sales at will

By person

16 insiders · 2 transactions
Insider
Role
Bought
Sold
Net
Holding
Of company
Worth
Change
Cherry Brian N
Director
$999.99K (1)
—
+$999.99K
166,486
1.66%
$1.60M
+334.5%
Nguyen AnhCo
President and CEO
—
$40.88K (1)
−$40.88K
132,775
1.32%
$1.27M
+67.8%
EcoR1 Capital, LLC entity
10% owner
—
—
—
1,552,000
15.46%
$14.90M
+48.6%
Adiumentum Capital Fund I LP entity
Director
—
—
—
1,209,395
12.05%
$11.61M
+6.7%
Panacea Innovation Ltd entity
10% owner
—
—
—
1,011,000
10.07%
$9.71M
−1.2%
Redmile Group, LLC entity
Director
—
—
—
636,852
6.34%
$6.11M
+44.2%
Touchon Pascal
Director
—
—
—
77,955
0.7766%
$748.37K
+11.2%
Hyllengren Eric J
Former EVP, CFO & COO
—
—
—
56,231
0.5602%
$539.82K
+127.1%
Grant-Huerta Yanina
Chief Accounting Officer
—
—
—
49,636
0.4945%
$476.51K
+25.1%
HEIDEN WILLIAM K
Director
—
—
—
34,188
0.3406%
$328.20K
+138.1%
Gallagher Carol Giltner
Director
—
—
—
33,012
0.3289%
$316.92K
+31.1%
Fust Matthew K
Director
—
—
—
30,188
0.3007%
$289.80K
+191.4%
Henrich Jill
EVP, Chief Regulatory Officer
—
—
—
18,679
0.1861%
$179.32K
−9.9%
Roncarolo Maria Grazia
Director
—
—
—
17,368
0.1730%
$166.73K
+82.1%
MALLIK AMEET
Director
—
—
—
16,928
0.1686%
$162.51K
+86.0%
Ciongoli Gregory Austin
Director
—
—
—
12,000
0.1195%
$115.20K
—

Individual transactions

0

Nothing of that kind in this period.

What was left out

Form 4 filings counted 2
Amendments (4/A) skipped 0
Filings about a different issuer 0
Unreadable filings 0
Joint filings 0
Sales on a Rule 10b5-1 plan 0
Sales straight out of an exercise 0
Sales at will 1
Transactions with no price 0
Shares from compensation/vesting 0
History held since 19 Sep 2016