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Disclosery

ATRA ATARA BIOTHERAPEUTICS INC

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COM NEW (common), issuer CIK 1604464

33 managers (33 13F filers) reported a position in ATRA shares at 2025-06-30, 1,803,350 shares in all. 4 filers opened a position and 9 filers sold out during the quarter.

Managers
33
13F filers
33
New
4
Added
5
Reduced
6
Sold out
9
Shares held by filers
1,803,350

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q2 2025

Filers in the available 13F reports with a share position at 2025-06-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
EcoR1 Capital, LLC573,183$4.42M0.26%013F-HRTimeline
Redmile Group, LLCin group Redmile Group, LLC441,701$3.41M0.36%013F-HRTimelineGroup
VANGUARD GROUP INCin group VANGUARD GROUP INC190,761$1.47M<0.01%013F-HRTimelineGroup
Vestal Point Capital, LP94,085$726K0.04%013F-HRTimeline
STALEY CAPITAL ADVISERS INC75,000$579K0.02%-5,00013F-HRTimeline
BlackRock, Inc.in group BlackRock, Inc.70,848$547K<0.01%+10,05013F-HRTimelineGroup
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC65,155$502K<0.01%-49,95613F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC60,136$464K<0.01%+1,45713F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP42,355$327K<0.01%new13F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP25,253$195K<0.01%013F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC23,003$178K<0.01%new13F-HRTimelineGroup
MACKENZIE FINANCIAL CORP22,514$174K<0.01%new13F-HRTimeline
GSA CAPITAL PARTNERS LLP19,591$151K0.01%+20613F-HRTimeline
FMR LLCin group FMR LLC17,156$132K<0.01%-113F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC16,936$131K<0.01%-50013F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY14,926$115K<0.01%+3,09813F-HRTimelineGroup
BRIDGEWAY CAPITAL MANAGEMENT, LLC14,000$108K<0.01%013F-HRTimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP11,170$86.2K<0.01%013F-HRTimelineGroup
UBS Group AGin group UBS Group AG8,385$64.7K<0.01%-15,94913F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/7,688$59.4K<0.01%-179,60913F-HRTimelineGroup
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC4,021$31K<0.01%new13F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA1,450$12K<0.01%+60013F-HR/ATimelineGroup
SBI Securities Co., Ltd.1,404$10.8K<0.01%013F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN951$7.34K<0.01%013F-HRTimelineGroup
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP703$5.6K<0.01%013F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO216$1.67K<0.01%013F-HRTimelineGroup
Raiffeisen Bank International AGin group Raiffeisen Bank International…200$1.54K<0.01%013F-HRTimelineGroup
Banque Transatlantique SAin group Banque Transatlantique SA176$1.37K<0.01%013F-HRTimelineGroup
RHUMBLINE ADVISERS175$1.35K<0.01%013F-HRTimeline
GROUP ONE TRADING LLC148$1.14K<0.01%013F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS50$386<0.01%013F-HRTimelineGroup
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.10$77<0.01%013F-HR/ATimelineGroup
CONCOURSE FINANCIAL GROUP SECURITIES, I…0$0013F-HRTimelineValue filed as zero, left out of ratios. Amount filed as zero, left out of ratios.