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
22 May 24	BuyUS$6,372,079	Adamantem Capital	Company	322,636.92	US$19.75
16 May 24	SellUS$15,888	Jill Henrich	Individual	1,030	US$15.43
16 May 24	SellUS$17,676	Eric Hyllengren	Individual	1,145.92	US$15.43
16 May 24	SellUS$26,469	Anhco Nguyen	Individual	1,715.96	US$15.43
16 May 24	SellUS$19,991	K. Murugan	Individual	1,296.04	US$15.43
16 May 24	SellUS$50,289	Pascal Touchon	Individual	3,260.24	US$15.43
04 Mar 24	SellUS$2,793	Jill Henrich	Individual	155.16	US$18.00
04 Mar 24	SellUS$17,888	Pascal Touchon	Individual	993.76	US$18.00
04 Mar 24	SellUS$4,810	Eric Hyllengren	Individual	267.16	US$18.03
04 Mar 24	SellUS$7,232	K. Murugan	Individual	401.76	US$18.00
04 Mar 24	SellUS$7,737	Anhco Nguyen	Individual	429.84	US$18.00
16 Nov 23	SellUS$1,271	Jill Henrich	Individual	130.68	US$9.73
16 Nov 23	SellUS$4,652	Eric Hyllengren	Individual	478.32	US$9.73
16 Nov 23	SellUS$3,231	K. Murugan	Individual	332.28	US$9.73
16 Nov 23	SellUS$7,939	Pascal Touchon	Individual	816.36	US$9.73
16 Nov 23	SellUS$4,780	Manher Joshi	Individual	491.48	US$9.73
16 Nov 23	SellUS$3,445	Anhco Nguyen	Individual	354.24	US$9.73
14 Nov 23	BuyUS$68,214	Carol Gallagher	Individual	10,800	US$7.75
10 Nov 23	BuyUS$25,330	William Heiden	Individual	4,000	US$6.33
10 Nov 23	BuyUS$101,340	Eric Dobmeier	Individual	17,873	US$5.67
16 Aug 23	SellUS$5,531	Jill Henrich	Individual	133.84	US$41.35
16 Aug 23	SellUS$11,526	Manher Joshi	Individual	279	US$41.33
16 Aug 23	SellUS$14,330	K. Murugan	Individual	346.88	US$41.33
16 Aug 23	SellUS$24,997	Anhco Nguyen	Individual	605.04	US$41.33
16 Aug 23	SellUS$50,835	Pascal Touchon	Individual	1,230.64	US$41.33
16 Aug 23	SellUS$13,527	Eric Hyllengren	Individual	327.44	US$41.35

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	236	0.0049%
Individual Insiders	104,361	2.17%
VC/PE Firms	322,637	6.7%
General Public	870,095	18.1%
Hedge Funds	1,037,695	21.5%
Institutions	2,481,621	51.5%

Dilution of Shares: Shareholders have been diluted in the past year, with total shares outstanding growing by 22.9%.

Top Shareholders

Top 25 shareholders own 73.33% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
8.44%	EcoR1 Capital, LLC	406,681	US$3.4m	0.99%	0.1%
7.69%	Redmile Group, LLC	370,532	US$3.1m	-10.1%	0.14%
6.7%	Adamantem Capital	322,637	US$2.7m	0%	no data
5.67%	BlackRock, Inc.	273,259	US$2.3m	-3.61%	no data
5.46%	Bank of America Corporation, Asset Management Arm	263,212	US$2.2m	3,380%	no data
5.41%	Citadel Advisors LLC	260,482	US$2.2m	2,380%	no data
4.16%	The Vanguard Group, Inc.	200,517	US$1.7m	-25%	no data
4.12%	T. Rowe Price Group, Inc.	198,326	US$1.6m	8,920%	no data
3.45%	Tavistock Life Sciences	166,000	US$1.4m	0%	0.07%
2.33%	Vestal Point Capital, LP	112,000	US$925.1k	0%	0.08%
2.19%	Acadian Asset Management LLC	105,547	US$871.8k	49.5%	no data
2.18%	AQR Capital Management, LLC	104,904	US$866.5k	-10.5%	no data
2.07%	State Street Global Advisors, Inc.	99,561	US$822.4k	-10.6%	no data
1.79%	Geode Capital Management, LLC	86,343	US$713.2k	0.39%	no data
1.56%	Tang Capital Management, LLC	75,196	US$621.1k	0%	0.08%
1.56%	Kleiner Perkins Caufield & Byers	75,066	US$620.0k	0%	0.13%
1.47%	Woodline Partners LP	70,992	US$586.4k	0%	0.01%
1.12%	Morgan Stanley, Investment Banking and Brokerage Investments	53,730	US$443.8k	-24.5%	no data
1.01%	JP Morgan Asset Management	48,547	US$401.0k	-40.1%	no data
0.91%	Medical Strategy GmbH, Asset Management Arm	43,888	US$362.5k	0%	0.02%
0.83%	Staley Capital Advisers, Inc.	40,000	US$330.4k	0%	0.02%
0.83%	Antipodean Advisors LLC	40,000	US$330.4k	0%	1.59%
0.82%	J. Goldman & Co., L.P.	39,466	US$326.0k	0%	0.01%
0.81%	Renaissance Technologies LLC	39,215	US$323.9k	57.4%	no data
0.74%	Checkpoint Capital, LLC, Asset Management Arm	35,714	US$295.0k	0%	0.21%