Security key
046513206
Atara Biotherapeutics, Inc. - Common Stock (ATRA)
CUSIP: 046513206
Q2 2025 13F Holders as of 30 Jun 2025
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 1,803,350
- Total 13F value
- $13,921,685
- Share change
- -283,443
- SEC-reported price per share
- $7.72
- Number of holders
- 32
- Value change
- -$1,938,164
- Number of buys
- 9
- Number of sells
- 14
- Shares outstanding
- 8,191,888
Holder snapshot
6 facts
Security identity
1 fact
Report period
Q2 2025
Institutions
32
Top holders
10
ATRA full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q3 2025
Previous quarter: Q1 2025
Atara Biotherapeutics, Inc. SEC filings
Atara Biotherapeutics, Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 046513206
Recent filing periods:
Ownership snapshot
Top reported holders of ATRA - Atara Biotherapeutics, Inc. - Common Stock (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.
Largest current holder
Adiumentum Capital Fund I LP
13D/G signal
Adiumentum Capital Fund I LP
Evidence rows
15
Latest as of
10 Jun 2025
3/4/5
13D/G
13F
Lead comparable stake: 20%
13D/G row: Adiumentum Capital Fund I LP
Showing 1-6 of 15 holder rows.
Quick read
Adiumentum Capital Fund I LP leads the comparable SEC ownership view at 20%.
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.
Comparable ownership
Top 5
Adiumentum Capital Fund I LP
20%
Redmile Group, LLC
5.4%
Pascal Touchon
0.95%
Carol Giltner Gallagher
0.4%
William K. Heiden
0.27%
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 |
|---|---|---|---|---|---|
| Adiumentum Capital Fund I LP |
3/4/5
13D/G
Director, Other*, 10%+ Owner
|
20%
from 13D/G
|
$10,487,308
1,586,588 shares
mixed-class rows
|
— | 16 May 2025 |
| Redmile Group, LLC |
3/4/5
13F
Director · Company
|
5.4%
|
$3,356,927
441,701 shares
|
— | 16 May 2025 |
| Pascal Touchon |
3/4/5
Director
|
0.95%
|
$589,339
77,955 shares
|
— | 10 Jun 2025 |
| Carol Giltner Gallagher |
3/4/5
Director
|
0.4%
|
$249,570
33,012 shares
|
— | 10 Jun 2025 |
| William K. Heiden |
3/4/5
Director
|
0.27%
|
$167,741
22,188 shares
|
— | 10 Jun 2025 |
| Matthew K. Fust |
3/4/5
Director
|
0.22%
|
$137,501
18,188 shares
|
— | 10 Jun 2025 |
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 Q2 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
32
Shares
1,803,350
Rows available
32
| Investor | Option | Weight % | Change % | Reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* 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 failed the local validity check.
Compare Q2 2025 vs Q1 2025 Across Filers
Q1 2025 holders
36
Q2 2025 holders
32
Holder diff
-4
| Investor | Q1 2025 Shares | Q2 2025 Shares | Share Diff | Share Chg % | Q1 2025 value | Q2 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend