Atara Biotherapeutics Ownership

Who are the major shareholders and have insiders been buying or selling?

Recent Insider Transactions

NasdaqGS:ATRA Recent Insider Transactions by Companies or Individuals
Date	Value	Name	Entity	Shares	Max Price
04 Mar 24	SellUS$2,793	Jill Henrich	Individual	3,879	US$0.72
04 Mar 24	SellUS$17,888	Pascal Touchon	Individual	24,844	US$0.72
04 Mar 24	SellUS$4,810	Eric Hyllengren	Individual	6,679	US$0.72
04 Mar 24	SellUS$7,232	K. Murugan	Individual	10,044	US$0.72
04 Mar 24	SellUS$7,737	Anhco Nguyen	Individual	10,746	US$0.72
16 Nov 23	SellUS$1,271	Jill Henrich	Individual	3,267	US$0.39
16 Nov 23	SellUS$4,652	Eric Hyllengren	Individual	11,958	US$0.39
16 Nov 23	SellUS$3,231	K. Murugan	Individual	8,307	US$0.39
16 Nov 23	SellUS$7,939	Pascal Touchon	Individual	20,409	US$0.39
16 Nov 23	SellUS$4,780	Manher Joshi	Individual	12,287	US$0.39
16 Nov 23	SellUS$3,445	Anhco Nguyen	Individual	8,856	US$0.39
14 Nov 23	BuyUS$68,214	Carol Gallagher	Individual	270,000	US$0.31
10 Nov 23	BuyUS$25,330	William Heiden	Individual	100,000	US$0.25
10 Nov 23	BuyUS$101,340	Eric Dobmeier	Individual	446,825	US$0.23
16 Aug 23	SellUS$5,531	Jill Henrich	Individual	3,346	US$1.65
16 Aug 23	SellUS$11,526	Manher Joshi	Individual	6,975	US$1.65
16 Aug 23	SellUS$14,330	K. Murugan	Individual	8,672	US$1.65
16 Aug 23	SellUS$24,997	Anhco Nguyen	Individual	15,126	US$1.65
16 Aug 23	SellUS$50,835	Pascal Touchon	Individual	30,766	US$1.65
16 Aug 23	SellUS$13,527	Eric Hyllengren	Individual	8,186	US$1.65
27 Jun 23	SellUS$23,723	Pascal Touchon	Individual	14,291	US$1.66
16 May 23	SellUS$17,089	K. Murugan	Individual	8,389	US$2.04
16 May 23	SellUS$38,784	Charlene Banard	Individual	19,040	US$2.04
16 May 23	SellUS$16,131	Eric Hyllengren	Individual	7,918	US$2.04
16 May 23	SellUS$60,633	Pascal Touchon	Individual	29,766	US$2.04

Insider Trading Volume

Insider Buying: ATRA insiders have only sold shares in the past 3 months.

Ownership Breakdown

What is the ownership structure of ATRA?
Owner Type	Number of Shares	Ownership Percentage
Private Companies	20,300	0.017%
Individual Insiders	1,868,392	1.57%
Hedge Funds	26,901,571	22.5%
General Public	40,767,129	34.2%
Institutions	49,801,838	41.7%

Dilution of Shares: Shareholders have been diluted in the past year, with total shares outstanding growing by 23.5%.

Top Shareholders

Top 25 shareholders own 59.96% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
8.63%	Redmile Group, LLC	10,301,409	US$7.4m	64%	0.31%
8.43%	EcoR1 Capital, LLC	10,067,043	US$7.2m	0%	0.23%
5.94%	BlackRock, Inc.	7,087,213	US$5.1m	-7.91%	no data
5.6%	The Vanguard Group, Inc.	6,686,043	US$4.8m	1.21%	no data
5.47%	Citadel Advisors LLC	6,533,119	US$4.7m	2,380%	no data
3.09%	UBS Asset Management AG	3,693,225	US$2.6m	6,210%	no data
2.46%	AQR Capital Management, LLC	2,930,283	US$2.1m	247%	no data
2.45%	Millennium Management LLC	2,920,980	US$2.1m	793%	no data
2.33%	State Street Global Advisors, Inc.	2,784,200	US$2.0m	10.4%	no data
1.8%	Geode Capital Management, LLC	2,150,150	US$1.5m	3.54%	no data
1.7%	JP Morgan Asset Management	2,026,116	US$1.4m	-75.9%	no data
1.57%	Kleiner Perkins Caufield & Byers	1,876,650	US$1.3m	0%	0.26%
1.49%	Morgan Stanley, Investment Banking and Brokerage Investments	1,779,960	US$1.3m	-12.2%	no data
1.48%	Acadian Asset Management LLC	1,765,554	US$1.3m	230%	no data
0.92%	Medical Strategy GmbH, Asset Management Arm	1,097,247	US$784.2k	-1.79%	0.05%
0.87%	D. E. Shaw & Co., L.P.	1,033,992	US$739.0k	-73.6%	no data
0.84%	Antipodean Advisors LLC	1,000,000	US$714.7k	0%	3.4%
0.84%	Staley Capital Advisers, Inc.	1,000,000	US$714.7k	0%	0.03%
0.71%	Northern Trust Global Investments	845,427	US$604.2k	5.82%	no data
0.66%	GSA Capital Partners LLP	784,367	US$560.6k	0%	0.05%
0.65%	Jacobs Levy Equity Management Inc	780,986	US$558.2k	37.8%	no data
0.62%	Charles Schwab Investment Management, Inc.	745,145	US$532.6k	0%	no data
0.52%	Renaissance Technologies LLC	622,911	US$445.2k	-24.9%	no data
0.45%	Goldman Sachs Group, Investment Banking and Securities Investments	536,269	US$383.3k	-86.8%	no data
0.44%	Pacific Heights Asset Management, LLC	525,000	US$375.2k	0%	0.03%