Transaction · 0000905148-26-004085

Cherry Brian N

Cherry Brian N, DIR, reported an open-market or private purchase at Atara Biotherapeutics, Inc. involving 104166.000000 shares for an estimated $999993.60. Reported holdings after the transaction were 166486.000000 shares. A 10b5-1 reference was not detected in the stored filing text.

Open-market buySEC transaction code PDIR
ATRAAtara Biotherapeutics, Inc.
Filing timeSep 04
Trade dateSep 04, 2026
Filing · SECView on SEC
InsiderProfile

Price performance since filing

Close on the filing date, the pre-filing context, and the forward return at standard windows
Price at filing
$9.76
Pre-filing
1mo ago1w ago -5.8%1d ago -2.5%
Returns since
7d +0.0%30d +0.0%90d +0.0%180d +0.0%1y +0.0%

ATRA price since this filing

30 days of pre-filing context and vertical markers at the filing date plus 7d / 30d / 90d / 180d / 1y afterwards
ATRA since 2026-09-04Filed yesterday · 1 day of post-filing data
Loading…
Filing datePost-filing windows (7d, 30d, 90d, 180d, 1y)30 days of pre-filing context

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
Buy
Code P
Identifier
0000905148-26-004085
Common Stock
Transaction date
Sep 04, 2026
Filed Sep 04, 2026, 10:20 PM · 0d delay
Shares
104k sh
$960 per share
Estimated value
$99.9M
Computed from shares × price
Holdings after
166k sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $10.0MLarge $100M
Director Buy Direct Ownership Large Holdings Increase
+36score
Filing-only score

+36

Compact filing score computed from stored Form 4 facts. Version v1.

Strong filing signal

This filing has a high positive filing-only score. It may deserve closer research, but it is not an investment recommendation.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

No officer title

Officer NoDirector Yes10% NoOther No
Footnotes & amended
  1. F1

    Represents shares purchased by the Reporting Person from the Issuer, through its sales agent, pursuant to that certain Sales Agreement, dated November 1, 2023, by and between the Issuer and TD Securit…

Original filing · 0000905148-26-004085
Related transactions

0 other filings

Same reporting owner
Recent company activity

0 recent txs

ATRA