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 2018?

113 institutional investors reported ATRA - Atara Biotherapeutics, Inc. - Common Stock, par value $0.0001 per share for Q1 2018. Use the holders table for investor-level position and value details.

CUSIP: 046513107

Q1 2018 13F Holders as of 31 Mar 2018

Type / Class: Equity / Common Stock, par value $0.0001 per share
Shares outstanding: 9,606,000
Total 13F shares: 43,618,390
Share change: +13,796,026
Total reported value: $1,698,364,623
Put/Call ratio: 16%
Price per share: $39.00
Number of holders: 113
Value change: +$561,989,584
Number of buys: 90
Number of sells: 22

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 2018
Previous quarter: Q4 2017

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	56%	5,359,632	$97,009,000	—	31 Dec 2017	13F
ArrowMark Colorado Holdings LLC	13F	Company	33%	3,146,820	$56,957,000	—	31 Dec 2017	13F
Redmile Group, LLC	13F	Company	29%	2,815,988	$50,969,000	—	31 Dec 2017	13F
BRIDGER MANAGEMENT, LLC	13F	Company	27%	2,598,599	$47,035,000	—	31 Dec 2017	13F
BlackRock Finance, Inc.	13F	Company	20%	1,962,261	$35,517,000	—	31 Dec 2017	13F
FMR LLC	13F	Company	19%	1,833,868	$33,193,000	—	31 Dec 2017	13F
MORGAN STANLEY	13F	Company	18%	1,736,804	$31,436,000	—	31 Dec 2017	13F
EAGLE ASSET MANAGEMENT INC	13F	Company	15%	1,486,844	$28,712,000	—	31 Dec 2017	13F
CARILLON TOWER ADVISERS, INC.	13F	Company	13%	1,286,445	$23,284,000	—	31 Dec 2017	13F
Neuberger Berman Group LLC	13F	Company	11%	1,012,196	$18,321,000	—	31 Dec 2017	13F
Artal Group S.A.	13F	Company	10%	1,000,000	$18,100,000	—	31 Dec 2017	13F
VANGUARD GROUP INC	13F	Company	9.8%	937,492	$16,967,000	—	31 Dec 2017	13F
RTW INVESTMENTS, LP	13F	Company	5.8%	556,118	$10,066,000	—	31 Dec 2017	13F
Camber Capital Management LP	13F	Company	5.6%	535,500	$9,693,000	—	31 Dec 2017	13F
STATE STREET CORP	13F	Company	4.6%	443,821	$8,032,000	—	31 Dec 2017	13F
12 West Capital Management LP	13F	Company	4.2%	398,700	$7,216,000	—	31 Dec 2017	13F
NORGES BANK	13F	Company	3.6%	347,442	$6,289,000	—	31 Dec 2017	13F
NORTHERN TRUST CORP	13F	Company	3%	288,773	$5,227,000	—	31 Dec 2017	13F
NEXTHERA CAPITAL LP	13F	Company	3%	286,647	$5,188,000	—	31 Dec 2017	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	2%	196,841	$3,562,000	—	31 Dec 2017	13F
Alyeska Investment Group, L.P.	13F	Company	1.8%	174,868	$3,165,000	—	31 Dec 2017	13F
Bank of New York Mellon Corp	13F	Company	1.3%	129,237	$2,339,000	—	31 Dec 2017	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	1.1%	104,612	$1,894,000	—	31 Dec 2017	13F
BANK OF AMERICA CORP /DE/	13F	Company	1%	100,742	$1,823,000	—	31 Dec 2017	13F
Vident Investment Advisory, LLC	13F	Company	0.89%	85,810	$1,553,000	—	31 Dec 2017	13F
DEUTSCHE BANK AG\	13F	Company	0.74%	71,080	$1,285,000	—	31 Dec 2017	13F
IndexIQ Advisors LLC	13F	Company	0.71%	68,560	$1,241,000	—	31 Dec 2017	13F
TIAA CREF INVESTMENT MANAGEMENT LLC	13F	Company	0.65%	61,978	$1,122,000	—	31 Dec 2017	13F
TEACHERS ADVISORS, LLC	13F	Company	0.5%	47,715	$864,000	—	31 Dec 2017	13F
WELLS FARGO & COMPANY/MN	13F	Company	0.47%	45,606	$825,000	—	31 Dec 2017	13F
PARAMETRIC PORTFOLIO ASSOCIATES LLC	13F	Company	0.45%	42,808	$775,000	—	31 Dec 2017	13F
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	13F	Company	0.44%	42,159	$763,000	—	31 Dec 2017	13F
Alberta Investment Management Corp	13F	Company	0.41%	39,330	$712,000	—	31 Dec 2017	13F
ALPS ADVISORS INC	13F	Company	0.35%	33,904	$614,000	—	31 Dec 2017	13F
NEW YORK STATE COMMON RETIREMENT FUND	13F	Company	0.31%	30,000	$543,000	—	31 Dec 2017	13F
Swiss National Bank	13F	Company	0.3%	28,600	$518,000	—	31 Dec 2017	13F
ALLIANCEBERNSTEIN L.P.	13F	Company	0.29%	27,740	$502,000	—	31 Dec 2017	13F
RHUMBLINE ADVISERS	13F	Company	0.28%	27,202	$492,000	—	31 Dec 2017	13F
RAYMOND JAMES & ASSOCIATES	13F	Company	0.26%	25,325	$458,000	—	31 Dec 2017	13F
Hudson Bay Capital Management LP	13F	Company	0.26%	25,000	$453,000	—	31 Dec 2017	13F
PACIFIC HEIGHTS ASSET MANAGEMENT LLC	13F	Company	0.26%	25,000	$453,000	—	31 Dec 2017	13F
VIRTUS CAPITAL ADVISERS, LLC	13F	Company	0.25%	23,957	$434,000	—	31 Dec 2017	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	0.24%	22,771	$412,000	—	31 Dec 2017	13F
MANUFACTURERS LIFE INSURANCE COMPANY, THE	13F	Company	0.23%	21,624	$391,000	—	31 Dec 2017	13F
Squarepoint Ops LLC	13F	Company	0.21%	20,460	$370,000	—	31 Dec 2017	13F
ProShare Advisors LLC	13F	Company	0.21%	20,454	$370,000	—	31 Dec 2017	13F
GOLDMAN SACHS GROUP INC	13F	Company	0.21%	20,266	$367,000	—	31 Dec 2017	13F
Invesco Ltd.	13F	Company	0.2%	19,088	$345,000	—	31 Dec 2017	13F
CREDIT SUISSE AG/	13F	Company	0.2%	19,067	$345,000	—	31 Dec 2017	13F
Old West Investment Management, LLC	13F	Company	0.2%	19,010	$344,000	—	31 Dec 2017	13F

Institutional Holders of Atara Biotherapeutics, Inc. - Common Stock, par value $0.0001 per share (ATRA) as of Q1 2018

As of 31 Mar 2018, Atara Biotherapeutics, Inc. - Common Stock, par value $0.0001 per share (ATRA) was held by 113 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 43,618,390 shares. The largest 10 holders included BAUPOST GROUP LLC/MA, FMR LLC, Redmile Group, LLC, BlackRock Inc., BRIDGER MANAGEMENT, LLC, MORGAN STANLEY, STATE STREET CORP, PRICE T ROWE ASSOCIATES INC /MD/, Camber Capital Management LP, and VANGUARD GROUP INC. This page lists 113 institutional shareholders reporting positions in this security for the Q1 2018 filing period.

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

Compare Q1 2018 vs Q4 2017 Across Filers

Q4 2017 holders

Q1 2018 holders

113

Holder diff

Investor	Q4 2017 Shares	Q1 2018 Shares	Share Diff	Share Chg %	Q4 2017 Value $	Q1 2018 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.