Atara Biotherapeutics, Inc. - Common Stock, par value $0.0001 per share (ATRA)

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

CUSIP 046513107 is the security identifier for ATRA - Atara Biotherapeutics, Inc. - Common Stock, par value $0.0001 per share used to aggregate holder disclosures.

Q: How many institutions held ATRA - Atara Biotherapeutics, Inc. - Common Stock, par value $0.0001 per share in Q1 2016?

69 institutional investors reported ATRA - Atara Biotherapeutics, Inc. - Common Stock, par value $0.0001 per share for Q1 2016. Use the holders table for investor-level position and value details.

CUSIP: 046513107

Q1 2016 13F Holders as of 31 Mar 2016

Type / Class: Equity / Common Stock, par value $0.0001 per share
Shares outstanding: 8,177,570
Total 13F shares: 19,799,648
Share change: +535,808
Total reported value: $376,755,000
Price per share: $19.03
Number of holders: 69
Value change: +$7,120,067
Number of buys: 37
Number of sells: 34

Quarterly Holders Quick Answers

What is CUSIP 046513107?
CUSIP 046513107 identifies ATRA - Atara Biotherapeutics, Inc. - Common Stock, par value $0.0001 per share in SEC institutional holdings data.

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Newer quarter: Q2 2016
Previous quarter: Q4 2015

Recent filing periods for CUSIP 046513107:

Q1 2026 Q4 2025 Q3 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024 Q1 2024

Top shareholders of ATRA - Atara Biotherapeutics, Inc. - Common Stock, par value $0.0001 per share (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	$141,548,000	—	31 Dec 2015	13F
FMR LLC	13F	Company	26%	2,085,790	$55,086,000	—	31 Dec 2015	13F
Redmile Group, LLC	13F	Company	19%	1,534,962	$40,538,000	—	31 Dec 2015	13F
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	13F	Company	15%	1,235,435	$32,628,000	—	31 Dec 2015	13F
EAGLE ASSET MANAGEMENT INC	13F	Company	10%	853,400	$22,538,000	—	31 Dec 2015	13F
BlackRock Fund Advisors	13F	Company	9.2%	748,592	$19,770,000	—	31 Dec 2015	13F
ArrowMark Colorado Holdings LLC	13F	Company	9%	736,520	$19,451,000	—	31 Dec 2015	13F
Visium Asset Management, LP	13F	Company	8.8%	722,626	$19,085,000	—	31 Dec 2015	13F
BRIDGER MANAGEMENT, LLC	13F	Company	8.6%	706,848	$18,668,000	—	31 Dec 2015	13F
STATE STREET CORP	13F	Company	7.4%	601,687	$15,889,000	—	31 Dec 2015	13F
VANGUARD GROUP INC	13F	Company	7.1%	583,135	$15,401,000	—	31 Dec 2015	13F
Neuberger Berman Group LLC	13F	Company	6%	493,915	$13,044,000	—	31 Dec 2015	13F
RTW INVESTMENTS, LP	13F	Company	5.3%	433,923	$11,460,000	—	31 Dec 2015	13F
12 West Capital Management LP	13F	Company	4.8%	393,700	$10,398,000	—	31 Dec 2015	13F
BlackRock Institutional Trust Company, N.A.	13F	Company	4.8%	390,388	$10,310,000	—	31 Dec 2015	13F
NORTHERN TRUST CORP	13F	Company	2.3%	187,073	$4,940,000	—	31 Dec 2015	13F
TIVERTON ASSET MANAGEMENT LLC	13F	Company	2.3%	185,113	$4,889,000	—	31 Dec 2015	13F
Cormorant Asset Management, LP	13F	Company	1.8%	150,000	$3,962,000	—	31 Dec 2015	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	1.6%	132,254	$3,492,000	—	31 Dec 2015	13F
TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY	13F	Company	1.5%	126,400	$3,338,000	—	31 Dec 2015	13F
MORGAN STANLEY	13F	Company	1.5%	125,960	$3,326,000	—	31 Dec 2015	13F
Invesco Ltd.	13F	Company	1.3%	110,173	$2,910,000	—	31 Dec 2015	13F
OXFORD ASSET MANAGEMENT LLP	13F	Company	1.2%	100,632	$2,538,000	—	31 Dec 2015	13F
ACUTA CAPITAL PARTNERS, LLC	13F	Company	1.2%	95,000	$2,509,000	—	31 Dec 2015	13F
TEACHERS ADVISORS, LLC	13F	Company	1.1%	90,153	$2,381,000	—	31 Dec 2015	13F
Bank of New York Mellon Corp	13F	Company	1.1%	87,401	$2,308,000	—	31 Dec 2015	13F
BANK OF AMERICA CORP /DE/	13F	Company	0.93%	75,985	$2,007,000	—	31 Dec 2015	13F
Cupps Capital Management, LLC	13F	Company	0.91%	74,727	$1,973,000	—	31 Dec 2015	13F
TIAA CREF INVESTMENT MANAGEMENT LLC	13F	Company	0.9%	73,782	$1,949,000	—	31 Dec 2015	13F
JPMORGAN CHASE & CO	13F	Company	0.74%	60,700	$1,603,000	—	31 Dec 2015	13F
BlackRock Investment Management, LLC	13F	Company	0.68%	55,993	$1,479,000	—	31 Dec 2015	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.64%	52,121	$1,377,000	—	31 Dec 2015	13F
NORGES BANK	13F	Company	0.49%	40,010	$1,057,000	—	31 Dec 2015	13F
ALPS ADVISORS INC	13F	Company	0.46%	37,718	$996,000	—	31 Dec 2015	13F
A.R.T. Advisors, LLC	13F	Company	0.44%	35,611	$940,000	—	31 Dec 2015	13F
UBS Group AG	13F	Company	0.43%	35,046	$925,000	—	31 Dec 2015	13F
WELLS FARGO & COMPANY/MN	13F	Company	0.39%	31,501	$832,000	—	31 Dec 2015	13F
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	13F	Company	0.38%	31,200	$824,000	—	31 Dec 2015	13F
CREDIT SUISSE AG/	13F	Company	0.32%	25,930	$685,000	—	31 Dec 2015	13F
ProShare Advisors LLC	13F	Company	0.31%	25,478	$673,000	—	31 Dec 2015	13F
Casdin Capital, LLC	13F	Company	0.31%	25,000	$660,000	—	31 Dec 2015	13F
Vident Investment Advisory, LLC	13F	Company	0.28%	22,497	$594,000	—	31 Dec 2015	13F
ALLIANCEBERNSTEIN L.P.	13F	Company	0.26%	21,440	$566,000	—	31 Dec 2015	13F
Swiss National Bank	13F	Company	0.26%	20,900	$552,000	—	31 Dec 2015	13F
TUDOR INVESTMENT CORP ET AL	13F	Company	0.23%	19,100	$504,000	—	31 Dec 2015	13F
NEW YORK STATE COMMON RETIREMENT FUND	13F	Company	0.22%	18,100	$478,000	—	31 Dec 2015	13F
RHUMBLINE ADVISERS	13F	Company	0.21%	17,370	$459,000	—	31 Dec 2015	13F
LANDSCAPE CAPITAL MANAGEMENT, L.L.C.	13F	Company	0.16%	12,715	$336,000	—	31 Dec 2015	13F
SECOR Capital Advisors, LP	13F	Company	0.15%	12,273	$324,000	—	31 Dec 2015	13F
VIRTUS ADVISERS, LLC	13F	Company	0.15%	12,137	$321,000	—	31 Dec 2015	13F

Institutional Holders of Atara Biotherapeutics, Inc. - Common Stock, par value $0.0001 per share (ATRA) as of Q1 2016

As of 31 Mar 2016, Atara Biotherapeutics, Inc. - Common Stock, par value $0.0001 per share (ATRA) was held by 69 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 19,799,648 shares. The largest 10 holders included BAUPOST GROUP LLC/MA, FMR LLC, Redmile Group, LLC, UBS ASSET MANAGEMENT AMERICAS INC, EAGLE ASSET MANAGEMENT INC, Arrowpoint Asset Management, LLC, BlackRock Fund Advisors, BRIDGER MANAGEMENT, LLC, Visium Asset Management, LP, and VANGUARD GROUP INC. This page lists 69 institutional shareholders reporting positions in this security for the Q1 2016 filing period.

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

Compare Q1 2016 vs Q4 2015 Across Filers

Q4 2015 holders

Q1 2016 holders

Holder diff

-14

Investor	Q4 2015 Shares	Q1 2016 Shares	Share Diff	Share Chg %	Q4 2015 Value $	Q1 2016 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.