Atara Biotherapeutics, Inc. Insider Trading for December 2015

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General | Insiders | Insider Transactions | Monthly Overview | Weekly Overview

Overview of insider trading in Atara Biotherapeutics, Inc. for December 2015.

Date	Ticker	Company	Owner	Relationship	Transaction	Code	Cost ($)	Shares	Transaction Value ($)	Total Shares	% Holdings
Dec 21 2015	ATRA	Atara Biotherapeut ...	Soffer Gad	Chief Operating Off ...	Option Exercise	A	22.72	65,000	1,476,800	65,000
Dec 21 2015	ATRA	Atara Biotherapeut ...	Turner Heather D	VP, General Counsel ...	Option Exercise	A	22.72	65,000	1,476,800	65,000
Dec 21 2015	ATRA	Atara Biotherapeut ...	Ciechanover Isaac E.	Chief Executive Off ...	Option Exercise	A	22.72	220,000	4,998,400	220,000
Dec 21 2015	ATRA	Atara Biotherapeut ...	Haqq Christopher	Chief Medical Offic ...	Option Exercise	A	22.72	75,000	1,704,000	75,000
Dec 21 2015	ATRA	Atara Biotherapeut ...	MCGRATH JOHN	Chief Financial Off ...	Option Exercise	A	22.72	65,000	1,476,800	65,000
Dec 21 2015	ATRA	Atara Biotherapeut ...	Clark Mitchall G.	Chief R & QA Office ...	Option Exercise	A	22.72	65,000	1,476,800	65,000
Dec 17 2015	ATRA	Atara Biotherapeut ...	DOBMEIER ERIC	Director	Buy	P	22.00	2,500	55,000	2,500	0 to 2.5 K
Dec 17 2015	ATRA	Atara Biotherapeut ...	SEIDENBERG BETH C	Director	Buy	J	0.00	2,996	0	6,689	3.7 K to 6.7 K (+81.13 %)
Dec 17 2015	ATRA	Atara Biotherapeut ...	SEIDENBERG BETH C	Director	Sell	J	0.00	4,716	0	4,716	9.4 K to 4.7 K (-50.00 %)
Dec 16 2015	ATRA	Atara Biotherapeut ...	Ciechanover Isaac E.	Chief Executive Off ...	Sell	S	22.21	200	4,442	384,011	384.2 K to 384 K (-0.05 %)
Dec 16 2015	ATRA	Atara Biotherapeut ...	Ciechanover Isaac E.	Chief Executive Off ...	Sell	S	21.55	700	15,085	384,211	384.9 K to 384.2 K (-0.18 %)
Dec 16 2015	ATRA	Atara Biotherapeut ...	Ciechanover Isaac E.	Chief Executive Off ...	Sell	S	20.69	300	6,207	384,911	385.2 K to 384.9 K (-0.08 %)
Dec 16 2015	ATRA	Atara Biotherapeut ...	Ciechanover Isaac E.	Chief Executive Off ...	Sell	S	25.84	100	2,584	385,211	385.3 K to 385.2 K (-0.03 %)
Dec 16 2015	ATRA	Atara Biotherapeut ...	Ciechanover Isaac E.	Chief Executive Off ...	Sell	S	24.93	400	9,972	385,311	385.7 K to 385.3 K (-0.10 %)
Dec 16 2015	ATRA	Atara Biotherapeut ...	Ciechanover Isaac E.	Chief Executive Off ...	Sell	S	23.34	300	7,002	385,711	386 K to 385.7 K (-0.08 %)
Dec 16 2015	ATRA	Atara Biotherapeut ...	Ciechanover Isaac E.	Chief Executive Off ...	Sell	S	21.54	400	8,616	386,011	386.4 K to 386 K (-0.10 %)
Dec 07 2015	ATRA	Atara Biotherapeut ...	Ciechanover Isaac E.	Chief Executive Off ...	Sell	S	37.93	1,200	45,516	386,411	387.6 K to 386.4 K (-0.31 %)
Dec 07 2015	ATRA	Atara Biotherapeut ...	Ciechanover Isaac E.	Chief Executive Off ...	Sell	S	36.99	800	29,592	387,611	388.4 K to 387.6 K (-0.21 %)
Dec 07 2015	ATRA	Atara Biotherapeut ...	Ciechanover Isaac E.	Chief Executive Off ...	Sell	S	38.54	600	23,124	388,411	389 K to 388.4 K (-0.15 %)
Dec 07 2015	ATRA	Atara Biotherapeut ...	Ciechanover Isaac E.	Chief Executive Off ...	Sell	S	37.43	700	26,201	389,011	389.7 K to 389 K (-0.18 %)
Dec 07 2015	ATRA	Atara Biotherapeut ...	Ciechanover Isaac E.	Chief Executive Off ...	Sell	S	36.21	700	25,347	389,711	390.4 K to 389.7 K (-0.18 %)
Dec 01 2015	ATRA	Atara Biotherapeut ...	MCGRATH JOHN	Chief Financial Off ...	Sell	S	40.00	6,000	240,000	36,356	42.4 K to 36.4 K (-14.17 %)