Security key
046513107
Atara Biotherapeutics, Inc. - Common Stock, par value $0.0001 per share (ATRA)
CUSIP: 046513107
Q4 2022 13F Holders as of 31 Dec 2022
- Security type / class
- Equity / Common Stock, par value $0.0001 per share
- Total 13F shares
- 97,400,862
- Total 13F value
- $319,467,221
- Share change
- -196,458
- Put/Call ratio
- 0.82%
- SEC-reported price per share
- $3.28
- Number of holders
- 138
- Value change
- -$2,173,205
- Number of buys
- 64
- Number of sells
- 75
- Shares outstanding
- 9,606,000
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q4 2022
Institutions
138
Top holders
10
ATRA full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q3 2025
Atara Biotherapeutics, Inc. SEC filings
Atara Biotherapeutics, Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 046513107
Recent filing periods:
Ownership snapshot
Top reported holders of ATRA - Atara Biotherapeutics, Inc. - Common Stock, par value $0.0001 per share (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock Finance, Inc.
Disclosed value leader
BlackRock Finance, Inc.
Comparable rows
15/15
Latest evidence
30 Sep 2022
13F
Lead comparable stake: 93%
Showing 1-6 of 15 holder rows.
Quick read
BlackRock Finance, Inc. leads the comparable SEC ownership view at 93%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock Finance, Inc.'s linked filing trail.
Comparable ownership
Top 5
BlackRock Finance, Inc.
93%
JPMORGAN CHASE & CO
86%
WASATCH ADVISORS LP
85%
BAUPOST GROUP LLC/MA
85%
STATE STREET CORP
84%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock Finance, Inc. |
13F
Company
|
93%
|
$33,686,000
8,911,991 shares
|
— | 30 Sep 2022 |
| JPMORGAN CHASE & CO |
13F
Company
|
86%
|
$31,312,000
8,283,388 shares
|
— | 30 Sep 2022 |
| WASATCH ADVISORS LP |
13F
Company
|
85%
|
$30,755,000
8,136,363 shares
|
— | 30 Sep 2022 |
| BAUPOST GROUP LLC/MA |
13F
Company
|
85%
|
$30,707,000
8,123,616 shares
|
— | 30 Sep 2022 |
| STATE STREET CORP |
13F
Company
|
84%
|
$30,608,000
8,097,353 shares
|
— | 30 Sep 2022 |
| MAVERICK CAPITAL LTD |
13F
Company
|
82%
|
$29,695,000
7,855,824 shares
|
— | 30 Sep 2022 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q4 2022
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
138
Shares
97,400,862
Rows available
138
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q4 2022 vs Q4 2025 Across Filers
Q4 2025 holders
0
Q4 2022 holders
138
Holder diff
138
| Investor | Q4 2025 Shares | Q4 2022 Shares | Share Diff | Share Chg % | Q4 2025 value | Q4 2022 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend