Atara Biotherapeutics Ownership

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

Recent Insider Transactions

DB:AT20 Recent Insider Transactions by Companies or Individuals
Date	Value	Name	Entity	Shares	Max Price
16 Aug 24	Sell€5,808	Jill Henrich	Individual	963	€6.03
16 Aug 24	Sell€6,984	K. Murugan	Individual	1,158	€6.03
16 Aug 24	Sell€6,453	Eric Hyllengren	Individual	1,070	€6.03
16 Aug 24	Sell€10,983	Anhco Nguyen	Individual	1,821	€6.03
16 Aug 24	Sell€18,323	Pascal Touchon	Individual	3,038	€6.03
22 May 24	Buy€5,880,792	Adiumentum Capital Management	Company	322,636.92	€18.23
16 May 24	Sell€14,617	Jill Henrich	Individual	1,030	€14.19
16 May 24	Sell€16,262	Eric Hyllengren	Individual	1,145.92	€14.19
16 May 24	Sell€24,351	Anhco Nguyen	Individual	1,715.96	€14.19
16 May 24	Sell€18,392	K. Murugan	Individual	1,296.04	€14.19
16 May 24	Sell€46,266	Pascal Touchon	Individual	3,260.24	€14.19
04 Mar 24	Sell€2,571	Jill Henrich	Individual	155.16	€16.57
04 Mar 24	Sell€16,469	Pascal Touchon	Individual	993.76	€16.57
04 Mar 24	Sell€4,429	Eric Hyllengren	Individual	267.16	€16.60
04 Mar 24	Sell€6,658	K. Murugan	Individual	401.76	€16.57
04 Mar 24	Sell€7,124	Anhco Nguyen	Individual	429.84	€16.57
16 Nov 23	Sell€1,170	Jill Henrich	Individual	130.68	€8.95
16 Nov 23	Sell€4,282	Eric Hyllengren	Individual	478.32	€8.95
16 Nov 23	Sell€2,975	K. Murugan	Individual	332.28	€8.95
16 Nov 23	Sell€7,309	Pascal Touchon	Individual	816.36	€8.95
16 Nov 23	Sell€4,400	Manher Joshi	Individual	491.48	€8.95
16 Nov 23	Sell€3,171	Anhco Nguyen	Individual	354.24	€8.95
14 Nov 23	Buy€62,853	Carol Gallagher	Individual	10,800	€7.14
10 Nov 23	Buy€23,739	William Heiden	Individual	4,000	€5.93
10 Nov 23	Buy€94,976	Eric Dobmeier	Individual	17,873	€5.31

Insider Buying: AT20 insiders have only sold shares in the past 3 months.

Dilution of Shares: Shareholders have been diluted in the past year, with total shares outstanding growing by 21.5%.

Top 25 shareholders own 80.79% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
23.1%	Adiumentum Capital Management	1,133,823	€9.9m	251%	no data
9.2%	Redmile Group, LLC	452,270	€4.0m	22.1%	0.17%
8.27%	EcoR1 Capital, LLC	406,679	€3.6m	0%	0.1%
5.3%	Citadel Advisors LLC	260,480	€2.3m	0%	no data
3.78%	Bank of America Corporation, Asset Management Arm	186,001	€1.6m	-29.3%	no data
3.45%	The Vanguard Group, Inc.	169,336	€1.5m	-15.6%	no data
3.38%	Tavistock Life Sciences	166,000	€1.5m	0%	0.07%
2.85%	Centiva Capital, LP	140,250	€1.2m	0%	0.06%
2.43%	Acadian Asset Management LLC	119,370	€1.0m	13.1%	no data
2.37%	Millennium Management LLC	116,671	€1.0m	707%	no data
2.28%	Vestal Point Capital, LP	112,000	€982.7k	0%	0.06%
2.09%	Qube Research & Technologies Ltd	102,663	€900.8k	0%	no data
1.53%	Tang Capital Management, LLC	75,196	€659.8k	0%	0.06%
1.53%	Kleiner Perkins Caufield & Byers	75,066	€658.6k	0%	0.14%
1.44%	Woodline Partners LP	70,889	€622.0k	-0.15%	0.01%
1.24%	BlackRock, Inc.	61,145	€536.5k	-77.6%	no data
0.94%	Renaissance Technologies LLC	46,064	€404.2k	17.5%	no data
0.87%	Geode Capital Management, LLC	42,677	€374.5k	-50.6%	no data
0.81%	Staley Capital Advisers, Inc.	40,000	€351.0k	0%	0.02%
0.75%	BNP Paribas Arbitrage Sa, Asset Management Arm	36,724	€322.2k	140%	no data
0.74%	PGIM, Inc.	36,340	€318.9k	0%	no data
0.71%	Medical Strategy GmbH, Asset Management Arm	35,046	€307.5k	-20.1%	0.02%
0.64%	Northern Trust Global Investments	31,492	€276.3k	-7.46%	no data
0.58%	Pascal Touchon	28,339	€248.7k	22.4%	no data
0.53%	Charles Schwab Investment Management, Inc.	26,155	€229.5k	-14.1%	no data