13F

Stock

Atara Biotherapeutics, Inc.

ATRA · held by 34 managers

Reported value

$11.5M

Holders

34

+4 new · −14 exited

Holders’ est. mark

−$12.2M

Price effect on 26 books still in the name

Largest holder

$3.31M

ADAGE CAPITAL PARTNERS GP, L.L.C.

Notable conviction

Share of each notable manager’s 13F book.

Holder count by quarter

Who holds it

Notable only
InvestorSharesValueEst. markChange
ADAGE CAPITAL PARTNERS GP, L.L.C.700K$3.31MNew
Redmile Group, LLC441.7K$2.09M−$5.9MCut−$5.9M
MACKENZIE FINANCIAL CORP313.6K$1.48M−$769.4KAdded$436.5K
VANGUARD CAPITAL MANAGEMENT LLC217.9K$1.03MHeld
Point72 Asset Management, L.P.194.3K$918.9K−$244.4KAdded$587.9K
EcoR1 Capital, LLC99.6K$471.1K−$1.33MCut−$9.9M
BlackRock, Inc.79K$373.8K−$896.6KCut−$840.2K
GEODE CAPITAL MANAGEMENT, LLC66.1K$313K−$833.9KCut−$816.1K
UBS Group AG50.1K$236.8K−$18.7KAdded$211.6K
STALEY CAPITAL ADVISERS INC50K$236.5K−$668KCut−$668K
MILLENNIUM MANAGEMENT LLC47.7K$225.6KNew
JANE STREET GROUP, LLC33.9K$160.2K−$186.9KCut−$92.9K
VANGUARD FIDUCIARY TRUST CO33.6K$159KHeld
BRIDGEWAY CAPITAL MANAGEMENT, LLC32.7K$154.6K−$436.8KCut−$436.8K
State Street26.5K$125.1K−$353.4KCut−$353.4K
Fidelity16.2K$76.8K−$216.9KCut−$233.5K
NORTHERN TRUST CORP12.3K$58.4K−$164.9KCut−$164.9K
MORGAN STANLEY9.17K$43.4K−$122.5KCut−$245.9K
ROYAL BANK OF CANADA4.32K$20K−$11.1KAdded$5K
SBI Securities Co., Ltd.1.57K$7.45K−$18.8KCut−$18K
Vanguard Global Advisers, LLC1.46K$6.89KHeld
JONES FINANCIAL COMPANIES LLLP703$3.23K−$9.49KCut−$9.49K
WELLS FARGO & COMPANY/MN251$1.19K−$3.35KCut−$3.35K
JPMORGAN CHASE & CO216$933−$2.97KCut−$2.97K
Banque Transatlantique SA176$906−$2.28KCut−$2.28K
RHUMBLINE ADVISERS175$827−$2.34KCut−$2.34K
ACADIAN ASSET MANAGEMENT LLC130.9K$617−$721Cut−$359
BNP PARIBAS FINANCIAL MARKETS58$274−$615Cut−$558
PlanVest Financial, Inc28$132Held
KERR FINANCIAL PLANNING Corp24$116$4Added$4
OSAIC HOLDINGS, INC.10$47−$133Cut−$133
Rockefeller Capital Management L.P.8$38−$107Cut−$107
Western Wealth Management, LLC1$5New
CITIGROUP INC1$5New

Who left

Positions as of Q1 2026. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.