What does CUSIP 046513107 represent in this 13F holders report?

CUSIP 046513107 is the security identifier for ATRA - Atara Biotherapeutics, Inc. - Common Stock used to aggregate holder disclosures.

How many institutions held ATRA - Atara Biotherapeutics, Inc. - Common Stock in Q1 2017?

82 institutional investors reported ATRA - Atara Biotherapeutics, Inc. - Common Stock for Q1 2017. Use the holders table for investor-level position and value details.

Atara Biotherapeutics, Inc. - Common Stock (ATRA)

CUSIP: 046513107

Q1 2017 13F Holders as of 31 Mar 2017

Type / Class: Equity / Common Stock
Shares outstanding: 8,165,808
Total 13F shares: 23,968,978
Share change: +2,463,148
Total reported value: $492,552,713
Put/Call ratio: 48%
Price per share: $20.55
Number of holders: 82
Value change: +$57,013,769
Number of buys: 43
Number of sells: 29

Quarterly Holders Quick Answers

What is CUSIP 046513107?
CUSIP 046513107 identifies ATRA - Atara Biotherapeutics, Inc. - Common Stock in SEC institutional holdings data.

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Jump to adjacent filing periods for faster comparison and easier crawl discovery.

Newer quarter: Q2 2017
Previous quarter: Q4 2016

Recent filing periods for CUSIP 046513107:

Q4 2025 Q3 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024 Q1 2024 Q4 2023

Top shareholders of ATRA - Atara Biotherapeutics, Inc. - Common Stock (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
BAUPOST GROUP LLC/MA	13F	Company	66%	5,359,632	$76,107,000	—	31 Dec 2016	13F
FMR LLC	13F	Company	34%	2,782,447	$39,512,000	—	31 Dec 2016	13F
Redmile Group, LLC	13F	Company	33%	2,670,942	$37,927,000	—	31 Dec 2016	13F
ArrowMark Colorado Holdings LLC	13F	Company	19%	1,560,612	$22,161,000	—	31 Dec 2016	13F
BlackRock Fund Advisors	13F	Company	14%	1,111,507	$15,783,000	—	31 Dec 2016	13F
EAGLE ASSET MANAGEMENT INC	13F	Company	14%	1,110,698	$15,771,000	—	31 Dec 2016	13F
BRIDGER MANAGEMENT, LLC	13F	Company	9.8%	798,321	$11,336,000	—	31 Dec 2016	13F
VANGUARD GROUP INC	13F	Company	9.2%	750,291	$10,653,000	—	31 Dec 2016	13F
Neuberger Berman Group LLC	13F	Company	9.2%	750,140	$10,652,000	—	31 Dec 2016	13F
STATE STREET CORP	13F	Company	7.4%	600,521	$8,526,000	—	31 Dec 2016	13F
BlackRock Institutional Trust Company, N.A.	13F	Company	6.2%	506,378	$7,191,000	—	31 Dec 2016	13F
Artal Group S.A.	13F	Company	6.1%	500,000	$7,100,000	—	31 Dec 2016	13F
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	13F	Company	5.8%	475,172	$6,747,000	—	31 Dec 2016	13F
Slate Path Capital LP	13F	Company	5.8%	475,000	$6,745,000	—	31 Dec 2016	13F
Alyeska Investment Group, L.P.	13F	Company	5%	408,200	$5,796,000	—	31 Dec 2016	13F
12 West Capital Management LP	13F	Company	4.9%	398,700	$5,662,000	—	31 Dec 2016	13F
RTW INVESTMENTS, LP	13F	Company	4.6%	372,624	$5,291,000	—	31 Dec 2016	13F
NORGES BANK	13F	Company	3.5%	283,882	$4,031,000	—	31 Dec 2016	13F
NORTHERN TRUST CORP	13F	Company	3.2%	259,895	$3,690,000	—	31 Dec 2016	13F
EcoR1 Capital, LLC	13F	Company	2.6%	215,812	$3,065,000	—	31 Dec 2016	13F
ADAGE CAPITAL PARTNERS GP, L.L.C.	13F	Company	2.2%	179,000	$2,542,000	—	31 Dec 2016	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	2%	166,408	$2,362,000	—	31 Dec 2016	13F
TEACHERS ADVISORS, LLC	13F	Company	1.7%	137,416	$1,951,000	—	31 Dec 2016	13F
BANK OF AMERICA CORP /DE/	13F	Company	1.4%	117,973	$1,675,000	—	31 Dec 2016	13F
Bank of New York Mellon Corp	13F	Company	1.4%	114,023	$1,620,000	—	31 Dec 2016	13F
BlackRock Investment Management, LLC	13F	Company	1.1%	92,922	$1,319,000	—	31 Dec 2016	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.92%	75,134	$1,067,000	—	31 Dec 2016	13F
MORGAN STANLEY	13F	Company	0.87%	70,689	$1,004,000	—	31 Dec 2016	13F
TIAA CREF INVESTMENT MANAGEMENT LLC	13F	Company	0.83%	68,179	$968,000	—	31 Dec 2016	13F
WELLS FARGO & COMPANY/MN	13F	Company	0.65%	53,461	$759,000	—	31 Dec 2016	13F
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	13F	Company	0.59%	47,904	$680,000	—	31 Dec 2016	13F
Vident Investment Advisory, LLC	13F	Company	0.57%	46,389	$659,000	—	31 Dec 2016	13F
CITIGROUP INC	13F	Company	0.54%	44,153	$627,000	—	31 Dec 2016	13F
TIVERTON ASSET MANAGEMENT LLC	13F	Company	0.52%	42,298	$600,000	—	31 Dec 2016	13F
CREDIT SUISSE AG/	13F	Company	0.47%	38,350	$544,000	—	31 Dec 2016	13F
GOLDMAN SACHS GROUP INC	13F	Company	0.34%	28,030	$398,000	—	31 Dec 2016	13F
ALPS ADVISORS INC	13F	Company	0.34%	27,736	$394,000	—	31 Dec 2016	13F
RHUMBLINE ADVISERS	13F	Company	0.33%	27,350	$388,000	—	31 Dec 2016	13F
MILLENNIUM MANAGEMENT LLC	13F	Company	0.32%	26,335	$374,000	—	31 Dec 2016	13F
Swiss National Bank	13F	Company	0.32%	26,100	$371,000	—	31 Dec 2016	13F
NEW YORK STATE COMMON RETIREMENT FUND	13F	Company	0.3%	24,700	$351,000	—	31 Dec 2016	13F
ProShare Advisors LLC	13F	Company	0.28%	22,796	$324,000	—	31 Dec 2016	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	0.27%	21,797	$310,000	—	31 Dec 2016	13F
ALLIANCEBERNSTEIN L.P.	13F	Company	0.26%	21,040	$299,000	—	31 Dec 2016	13F
SUSQUEHANNA INTERNATIONAL GROUP, LLP	13F	Company	0.23%	18,415	$261,000	—	31 Dec 2016	13F
RAYMOND JAMES & ASSOCIATES	13F	Company	0.22%	18,021	$256,000	—	31 Dec 2016	13F
METROPOLITAN LIFE INSURANCE CO/NY	13F	Company	0.22%	17,716	$252,000	—	31 Dec 2016	13F
MANUFACTURERS LIFE INSURANCE COMPANY, THE	13F	Company	0.2%	16,456	$234,000	—	31 Dec 2016	13F
PARAMETRIC PORTFOLIO ASSOCIATES LLC	13F	Company	0.19%	15,615	$222,000	—	31 Dec 2016	13F
Nationwide Fund Advisors	13F	Company	0.17%	14,285	$203,000	—	31 Dec 2016	13F

Institutional Holders of Atara Biotherapeutics, Inc. - Common Stock (ATRA) as of Q1 2017

As of 31 Mar 2017, Atara Biotherapeutics, Inc. - Common Stock (ATRA) was held by 82 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 23,968,978 shares. The largest 10 holders included BAUPOST GROUP LLC/MA, Redmile Group, LLC, FMR LLC, ArrowMark Colorado Holdings LLC, BlackRock Inc., BRIDGER MANAGEMENT, LLC, EAGLE ASSET MANAGEMENT INC, RTW INVESTMENTS, LP, Neuberger Berman Group LLC, and VANGUARD GROUP INC. This page lists 82 institutional shareholders reporting positions in this security for the Q1 2017 filing period.

Investor	Option	Weight %	Change %	Value $	* Price	Shares	Share Change	Activity	Report Period

Compare Q1 2017 vs Q4 2016 Across Filers

Q4 2016 holders

Q1 2017 holders

Holder diff

-1

Investor	Q4 2016 Shares	Q1 2017 Shares	Share Diff	Share Chg %	Q4 2016 Value $	Q1 2017 Value $	Value Diff $	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.