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 Net selling

Insider
Date
Role
Action
Shares
Price
Amount
Panacea Innovation Ltd
17 Mar 2026
10% owner
Exercised, kept indirect
259,163
$0.00
$25.92
Panacea Innovation Ltd
28 Nov 2025
10% owner
Exercised, kept indirect
48,737
$0.00
$4.87
Joel S Marcus
27 Feb 2019
Director
Exercised, kept
21,500
$13.20
$283.80K
Joel S Marcus
27 Feb 2019
Director
Exercised, kept
5,500
$15.08
$82.94K
Joel S Marcus
27 Feb 2019
Director
Exercised, kept
10,500
$24.05
$252.53K
Joel S Marcus
27 Feb 2019
Director
Exercised, kept
25,000
$25.15
$628.75K
Showing 250 of 531 transactions. The figures above use every one of them.

What was left out

Form 4 filings counted 450
Amendments (4/A) skipped 6
Filings about a different issuer 0
Unreadable filings 0
Joint filings 8
Sales on a Rule 10b5-1 plan 0
Sales straight out of an exercise 60
Sales at will 452
Transactions with no price 0
Shares from compensation/vesting 9,481,638
Sales filed before the plan box existed 372
History held since 16 Oct 2014