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 Q3 2015?

87 institutional investors reported ATRA - Atara Biotherapeutics, Inc. - Common Stock for Q3 2015. Use the holders table for investor-level position and value details.

Atara Biotherapeutics, Inc. - Common Stock (ATRA)

CUSIP: 046513107

Q3 2015 13F Holders as of 30 Sep 2015

Type / Class: Equity / Common Stock
Shares outstanding: 8,165,808
Total 13F shares: 19,482,171
Share change: +6,305,572
Total reported value: $612,517,952
Put/Call ratio: 86%
Price per share: $31.44
Number of holders: 87
Value change: +$196,917,062
Number of buys: 72
Number of sells: 16

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: Q4 2015
Previous quarter: Q2 2015

Recent filing periods for CUSIP 046513107:

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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	59%	4,809,632	$253,756,000	—	30 Jun 2015	13F
EcoR1 Capital, LLC	13F	Company	13%	1,063,189	$56,094,000	—	30 Jun 2015	13F
FMR LLC	13F	Company	12%	997,959	$52,652,000	—	30 Jun 2015	13F
Visium Asset Management, LP	13F	Company	11%	904,514	$47,722,000	—	30 Jun 2015	13F
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	13F	Company	7.6%	619,509	$32,685,000	—	30 Jun 2015	13F
JENNISON ASSOCIATES LLC	13F	Company	7.3%	599,485	$31,629,000	—	30 Jun 2015	13F
BRIDGER MANAGEMENT, LLC	13F	Company	6.1%	501,297	$26,448,000	—	30 Jun 2015	13F
Neuberger Berman Group LLC	13F	Company	5.5%	446,020	$23,532,000	—	30 Jun 2015	13F
Redmile Group, LLC	13F	Company	4.6%	372,642	$19,661,000	—	30 Jun 2015	13F
VANGUARD GROUP INC	13F	Company	4.3%	352,709	$18,609,000	—	30 Jun 2015	13F
BlackRock Fund Advisors	13F	Company	4.2%	346,203	$18,266,000	—	30 Jun 2015	13F
TIVERTON ASSET MANAGEMENT LLC	13F	Company	2.8%	225,113	$11,877,000	—	30 Jun 2015	13F
JPMORGAN CHASE & CO	13F	Company	2.5%	200,700	$10,589,000	—	30 Jun 2015	13F
STATE STREET CORP	13F	Company	2.3%	190,848	$10,070,000	—	30 Jun 2015	13F
BlackRock Institutional Trust Company, N.A.	13F	Company	2.2%	183,679	$9,691,000	—	30 Jun 2015	13F
12 West Capital Management LP	13F	Company	1.9%	155,447	$8,201,000	—	30 Jun 2015	13F
ArrowMark Colorado Holdings LLC	13F	Company	1.5%	123,668	$6,525,000	—	30 Jun 2015	13F
Ghost Tree Capital, LLC	13F	Company	1.2%	100,000	$5,276,000	—	30 Jun 2015	13F
TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY	13F	Company	1%	85,700	$4,522,000	—	30 Jun 2015	13F
NORTHERN TRUST CORP	13F	Company	1%	84,384	$4,452,000	—	30 Jun 2015	13F
Cupps Capital Management, LLC	13F	Company	0.96%	78,660	$4,150,000	—	30 Jun 2015	13F
Bank of New York Mellon Corp	13F	Company	0.93%	76,044	$4,012,000	—	30 Jun 2015	13F
TIAA CREF INVESTMENT MANAGEMENT LLC	13F	Company	0.8%	65,245	$3,442,000	—	30 Jun 2015	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	0.79%	64,431	$3,399,000	—	30 Jun 2015	13F
Cormorant Asset Management, LP	13F	Company	0.61%	50,000	$2,638,000	—	30 Jun 2015	13F
BlackRock Investment Management, LLC	13F	Company	0.6%	48,860	$2,578,000	—	30 Jun 2015	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.38%	30,796	$1,625,000	—	30 Jun 2015	13F
RUSSELL FRANK CO/	13F	Company	0.37%	30,457	$1,607,000	—	30 Jun 2015	13F
Absolute Return Capital, LLC	13F	Company	0.37%	29,945	$1,580,000	—	30 Jun 2015	13F
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	13F	Company	0.32%	26,464	$1,396,000	—	30 Jun 2015	13F
NORGES BANK	13F	Company	0.31%	25,010	$1,320,000	—	30 Jun 2015	13F
ALPS ADVISORS INC	13F	Company	0.3%	24,142	$1,274,000	—	30 Jun 2015	13F
ALLIANCEBERNSTEIN L.P.	13F	Company	0.26%	21,500	$1,134,000	—	30 Jun 2015	13F
TEACHERS ADVISORS, LLC	13F	Company	0.26%	21,108	$1,114,000	—	30 Jun 2015	13F
CADENCE CAPITAL MANAGEMENT LLC	13F	Company	0.22%	18,160	$958,000	—	30 Jun 2015	13F
Informed Momentum Co LLC	13F	Company	0.22%	17,932	$946,000	—	30 Jun 2015	13F
TWO SIGMA INVESTMENTS, LP	13F	Company	0.19%	15,473	$816,000	—	30 Jun 2015	13F
S.c.a. Candriam	13F	Individual	0.18%	15,000	$791,000	—	30 Jun 2015	13F
Swiss National Bank	13F	Company	0.17%	14,000	$739,000	—	30 Jun 2015	13F
SCHRODER INVESTMENT MANAGEMENT GROUP	13F	Company	0.17%	13,789	$711,000	—	30 Jun 2015	13F
RHUMBLINE ADVISERS	13F	Company	0.15%	12,400	$654,000	—	30 Jun 2015	13F
NEW YORK STATE COMMON RETIREMENT FUND	13F	Company	0.15%	12,078	$637,000	—	30 Jun 2015	13F
METROPOLITAN LIFE INSURANCE CO/NY	13F	Company	0.13%	10,256	$541,000	—	30 Jun 2015	13F
MANUFACTURERS LIFE INSURANCE COMPANY, THE	13F	Company	0.12%	9,583	$505,000	—	30 Jun 2015	13F
M&T BANK CORP	13F	Company	0.11%	9,380	$495,000	—	30 Jun 2015	13F
Nationwide Fund Advisors	13F	Company	0.11%	9,368	$494,000	—	30 Jun 2015	13F
AMERICAN INTERNATIONAL GROUP, INC.	13F	Company	0.11%	8,992	$474,418	—	30 Jun 2015	13F
BLACKROCK ADVISORS LLC	13F	Company	0.11%	8,747	$461,000	—	30 Jun 2015	13F
VOYA INVESTMENT MANAGEMENT LLC	13F	Company	0.09%	7,035	$371,000	—	30 Jun 2015	13F
BAMCO INC /NY/	13F	Company	0.09%	7,000	$369,000	—	30 Jun 2015	13F

Institutional Holders of Atara Biotherapeutics, Inc. - Common Stock (ATRA) as of Q3 2015

As of 30 Sep 2015, Atara Biotherapeutics, Inc. - Common Stock (ATRA) was held by 87 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 19,482,171 shares. The largest 10 holders included BAUPOST GROUP LLC/MA, FMR LLC, UBS GLOBAL ASSET MANAGEMENT AMERICAS INC, Redmile Group, LLC, JENNISON ASSOCIATES LLC, Visium Asset Management, LP, EcoR1 Capital, LLC, STATE STREET CORP, BAMCO INC /NY/, and BRIDGER MANAGEMENT, LLC. This page lists 87 institutional shareholders reporting positions in this security for the Q3 2015 filing period.

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

Compare Q3 2015 vs Q2 2015 Across Filers

Q2 2015 holders

Q3 2015 holders

Holder diff

Investor	Q2 2015 Shares	Q3 2015 Shares	Share Diff	Share Chg %	Q2 2015 Value $	Q3 2015 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.