Atara Biotherapeutics, Inc.

ATRA

Exchange: Nasdaq
Industry: Biological Products, (No Diagnostic Substances)
SEC CIK: 0001604464

SEC filings (opens in a new tab)

In the last 90 days, Atara Biotherapeutics, Inc. insiders filed 1 open-market purchase and 1 sale; 36 institutions reported holding it in 13F filings for Q2 2026, worth $51.3M in total; no superinvestor holds it.

Q1 2022 vs. Q4 2021

How the institutions holding Atara Biotherapeutics, Inc. changed between Q4 2021 and Q1 2022.

All holders in Q1 2022 All holders in Q4 2021

13F holders of ATRA: Q4 2021 compared with Q1 2022
Measure	Q4 2021	Of which not filed for Q1 2022	Q1 2022	Change
Holders	139	1	145	+7
Shares	95.2M	685	97.9M	+2.70M (+2.8%)
Value	$1.50B	$11.0K	$909.5M	−$590.9M (−39.4%)

1 institution that held it in Q4 2021 haven't filed for Q1 2022 yet. Not filing isn't selling, so the changes leave them out.

New holders (24)

Institutions that held Atara Biotherapeutics, Inc. at the end of Q1 2022 but not at the end of Q4 2021.

Institutions new to ATRA in Q1 2022
Institution	Shares	Value	% of portfolio
Renaissance Technologies LLC	569,800	$5.29M	0.01%
Sector Gamma AS	123,713	$1.15M	0.25%
Creative Planning	60,728	$564.0K	0.00%
Tudor Investment Corp Et Al	48,041	$446.0K	0.01%
Arrowstreet Capital, Limited Partnership	42,793	$398.0K	0.00%
AQR Capital Management LLC	33,402	$310.0K	0.00%
Walleye Capital LLC	31,847	$296.0K	0.01%
Fox Run Management, L.L.C.	23,953	$223.0K	0.12%
Qube Research & Technologies Ltd	23,670	$220.0K	0.00%
XTX Topco Ltd	23,282	$216.0K	0.09%
E Fund Management Co., Ltd.	19,420	$180.0K	0.01%
Janus Henderson Group PLC	14,521	$135.0K	0.00%
Susquehanna Fundamental Investments, LLC	14,147	$131.0K	0.00%
Envestnet Asset Management Inc	12,045	$112.0K	0.00%
Amalgamated Financial Corp.	10,796	$100.0K	0.00%
Monashee Investment Management LLC	10,000	$93.0K	0.03%
Running Point Capital Advisors, LLC	10,000	$93.0K	0.05%
Group One Trading, L.P.	4,288	$40.0K	0.00%
High Net Worth Advisory Group LLC	1,000	$9.00K	0.00%
Nisa Investment Advisors, LLC	650	$6.00K	0.00%
CWM, LLC	111	$1.00K	0.00%
Northwestern Mutual Wealth Management Co	10	$0	0.00%
TCWP LLC	42	$0	0.00%
IFP Advisors, Inc	2,000	–	–

Sold out (17)

Institutions that held Atara Biotherapeutics, Inc. at the end of Q4 2021 and filed for Q1 2022 without it.

Institutions that sold out of ATRA in Q1 2022
Institution	Shares, Q4 2021	Value, Q4 2021
Deep Track Capital, LP	750,000	$11.8M
Bridger Management, LLC	616,488	$9.72M
Public Sector Pension Investment Board	201,000	$3.17M
Two Sigma Advisers, LP	117,300	$1.85M
Altrinsic Global Advisors LLC	100,000	$1.58M
Prelude Capital Management, LLC	40,029	$631.0K
Americana Partners, LLC	20,500	$323.0K
Natixis Advisors, L.P.	19,469	$307.0K
Corton Capital Inc.	19,408	$306.0K
Bradley Foster & Sargent Inc	16,581	$261.0K
Bailard, Inc.	15,047	$237.0K
Algert Global LLC	13,553	$214.0K
Jane Street Group, LLC	13,172	$208.0K
Virginia Retirement Systems Et Al	12,600	$199.0K
Principal Financial Group Inc	10,146	$160.0K
TCI Wealth Advisors, Inc.	359	$6.00K
Dark Forest Capital Management LP	304	$5.00K

Not filed for Q1 2022 yet (1)

Institutions that held Atara Biotherapeutics, Inc. at the end of Q4 2021 and haven't filed a 13F for Q1 2022. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding ATRA in Q4 2021 that haven't filed for Q1 2022
Institution	Shares, Q4 2021	Value, Q4 2021
NEXT Financial Group, Inc	685	$11.0K