Skip to content
Disclosery

ATRA ATARA BIOTHERAPEUTICS INC

Follow

COM NEW (common), issuer CIK 1604464

36 managers (36 13F filers) reported a position in ATRA shares at 2025-09-30, 1,883,136 shares in all. 7 filers opened a position and 4 filers sold out during the quarter.

Managers
36
13F filers
36
New
7
Added
8
Reduced
7
Sold out
4
Shares held by filers
1,883,136

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, Q3 2025

Filers in the available 13F reports with a share position at 2025-09-30, 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$8.21M0.39%013F-HRTimeline
Redmile Group, LLCin group Redmile Group, LLC441,701$6.33M0.62%013F-HRTimelineGroup
VANGUARD GROUP INCin group VANGUARD GROUP INC203,438$2.92M<0.01%+12,67713F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP115,796$1.66M<0.01%+73,44113F-HRTimelineGroup
BlackRock, Inc.in group BlackRock, Inc.69,833$1M<0.01%-1,01513F-HRTimelineGroup
MACKENZIE FINANCIAL CORP63,816$914K<0.01%+41,30213F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC60,526$867K<0.01%+39013F-HRTimelineGroup
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC56,416$807K<0.01%-8,73913F-HRTimelineGroup
STALEY CAPITAL ADVISERS INC50,000$716K0.03%-25,00013F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY35,938$515K<0.01%+21,01213F-HR/ATimelineGroup
GSA CAPITAL PARTNERS LLP26,213$376K0.03%+6,62213F-HRTimeline
STATE STREET CORPin group STATE STREET CORP25,253$362K<0.01%013F-HRTimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC22,060$316K<0.01%new13F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC18,936$271K<0.01%+2,00013F-HRTimeline
UBS Group AGin group UBS Group AG17,268$247K<0.01%+8,88313F-HRTimelineGroup
FMR LLCin group FMR LLC17,156$246K<0.01%013F-HRTimelineGroup
Cambridge Investment Research Advisors,…17,109$245K<0.01%new13F-HRTimeline
Quadrature Capital Ltdin group Quadrature Capital Ltd16,542$237K<0.01%new13F-HRTimelineGroup
GLOBEFLEX CAPITAL L P15,458$222K0.03%new13F-HRTimeline
BRIDGEWAY CAPITAL MANAGEMENT, LLC14,000$201K<0.01%013F-HRTimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP11,033$158K<0.01%-13713F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/5,845$83.8K<0.01%-1,84313F-HR/ATimelineGroup
SBI Securities Co., Ltd.1,404$20.1K<0.01%013F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA1,209$17K<0.01%-24113F-HRTimelineGroup
Private Wealth Asset Management, LLC900$12.9K<0.01%new13F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP703$9.66K<0.01%013F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…342$4.9K<0.01%new13F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN251$3.6K<0.01%-70013F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO216$3.1K<0.01%013F-HR/ATimelineGroup
Banque Transatlantique SAin group Banque Transatlantique SA176$2.52K<0.01%013F-HRTimelineGroup
RHUMBLINE ADVISERS175$2.51K<0.01%013F-HRTimeline
GROUP ONE TRADING LLC148$2.12K<0.01%013F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS50$716<0.01%013F-HRTimelineGroup
KERR FINANCIAL PLANNING Corp24$322<0.01%13F-HR/ATimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.10$138<0.01%013F-HRTimelineGroup
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…8$115<0.01%new13F-HRTimelineGroup