$ATRA Atara Biotherapeutics, Inc. Insider Trading Week 20/2015

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

Overview of insider trading in Atara Biotherapeutics, Inc. in week 20/2015.

Date	Ticker	Company	Owner	Relationship	Transaction	Code	Cost ($)	Shares	Transaction Value ($)	Total Shares	% Holdings
May 21 2015	ATRA	Atara Biotherapeut ...	SEIDENBERG BETH C	Director	Sell	J	0.00	8,700	0	63,122	71.8 K to 63.1 K (-12.11 %)
May 21 2015	ATRA	Atara Biotherapeut ...	SEIDENBERG BETH C	Director	Sell	J	0.00	291,300	0	2,113,528	2.4 M to 2.1 M (-12.11 %)
May 21 2015	ATRA	Atara Biotherapeut ...	Kleiner Perkins Caufield & Bye ...	10% Owner	Sell	J	0.00	8,700	0	63,122	71.8 K to 63.1 K (-12.11 %)
May 21 2015	ATRA	Atara Biotherapeut ...	Kleiner Perkins Caufield & Bye ...	10% Owner	Sell	J	0.00	291,300	0	2,113,528	2.4 M to 2.1 M (-12.11 %)
May 19 2015	ATRA	Atara Biotherapeut ...	Fust Matthew K	Director	Option Exercise	M	0.00	7,478	0	18,162
May 19 2015	ATRA	Atara Biotherapeut ...	Fust Matthew K	Director	Buy	M	0.00	7,478	0	7,478	0 to 7.5 K
May 19 2015	ATRA	Atara Biotherapeut ...	Haqq Christopher	Chief Medical Offic ...	Option Exercise	M	0.00	4,422	0	8,844
May 19 2015	ATRA	Atara Biotherapeut ...	Haqq Christopher	Chief Medical Offic ...	Payment of Exercise	F	37.30	1,887	70,385	264,165	266.1 K to 264.2 K (-0.71 %)
May 19 2015	ATRA	Atara Biotherapeut ...	Haqq Christopher	Chief Medical Offic ...	Buy	M	0.00	4,422	0	266,052	261.6 K to 266.1 K (+1.69 %)
May 19 2015	ATRA	Atara Biotherapeut ...	MCGRATH JOHN	Chief Financial Off ...	Option Exercise	A	0.00	41,052	0	82,106
May 19 2015	ATRA	Atara Biotherapeut ...	MCGRATH JOHN	Chief Financial Off ...	Option Exercise	A	0.00	24,305	0	20,566
May 19 2015	ATRA	Atara Biotherapeut ...	MCGRATH JOHN	Chief Financial Off ...	Payment of Exercise	F	37.30	30,405	1,134,107	47,352	77.8 K to 47.4 K (-39.10 %)
May 19 2015	ATRA	Atara Biotherapeut ...	MCGRATH JOHN	Chief Financial Off ...	Buy	M	0.00	41,052	0	77,757	36.7 K to 77.8 K (+111.84 %)
May 19 2015	ATRA	Atara Biotherapeut ...	MCGRATH JOHN	Chief Financial Off ...	Buy	M	0.00	24,305	0	36,705	12.4 K to 36.7 K (+196.01 %)
May 19 2015	ATRA	Atara Biotherapeut ...	Soffer Gad	Chief Operating Off ...	Option Exercise	A	0.00	22,111	0	44,221
May 19 2015	ATRA	Atara Biotherapeut ...	Soffer Gad	Chief Operating Off ...	Option Exercise	A	0.00	80,128	0	73,718
May 19 2015	ATRA	Atara Biotherapeut ...	Soffer Gad	Chief Operating Off ...	Payment of Exercise	F	37.30	48,851	1,822,142	65,788	114.6 K to 65.8 K (-42.61 %)
May 19 2015	ATRA	Atara Biotherapeut ...	Soffer Gad	Chief Operating Off ...	Buy	M	0.00	80,128	0	114,639	34.5 K to 114.6 K (+232.18 %)
May 19 2015	ATRA	Atara Biotherapeut ...	Soffer Gad	Chief Operating Off ...	Buy	M	0.00	22,111	0	34,511	12.4 K to 34.5 K (+178.31 %)
May 19 2015	ATRA	Atara Biotherapeut ...	Clark Mitchall G.	Chief R & QA Office ...	Option Exercise	M	0.00	31,250	0	84,134
May 19 2015	ATRA	Atara Biotherapeut ...	Clark Mitchall G.	Chief R & QA Office ...	Payment of Exercise	F	37.30	13,066	487,362	30,584	43.7 K to 30.6 K (-29.93 %)
May 19 2015	ATRA	Atara Biotherapeut ...	Clark Mitchall G.	Chief R & QA Office ...	Buy	M	0.00	31,250	0	43,650	12.4 K to 43.7 K (+252.02 %)
May 19 2015	ATRA	Atara Biotherapeut ...	Ciechanover Isaac E.	Chief Executive Off ...	Option Exercise	M	0.00	31,508	0	63,015
May 19 2015	ATRA	Atara Biotherapeut ...	Ciechanover Isaac E.	Chief Executive Off ...	Payment of Exercise	F	37.30	14,801	552,077	54,707	69.5 K to 54.7 K (-21.29 %)
May 19 2015	ATRA	Atara Biotherapeut ...	Ciechanover Isaac E.	Chief Executive Off ...	Buy	M	0.00	31,508	0	69,508	38 K to 69.5 K (+82.92 %)
May 18 2015	ATRA	Atara Biotherapeut ...	SEIDENBERG BETH C	Director	Sell	J	0.00	71,822	0	71,822	143.6 K to 71.8 K (-50.00 %)
May 18 2015	ATRA	Atara Biotherapeut ...	SEIDENBERG BETH C	Director	Sell	J	0.00	194,200	0	2,404,828	2.6 M to 2.4 M (-7.47 %)
May 18 2015	ATRA	Atara Biotherapeut ...	Kleiner Perkins Caufield & Bye ...	10% Owner	Sell	J	0.00	5,800	0	71,822	77.6 K to 71.8 K (-7.47 %)
May 18 2015	ATRA	Atara Biotherapeut ...	Kleiner Perkins Caufield & Bye ...	10% Owner	Sell	J	0.00	194,200	0	2,404,828	2.6 M to 2.4 M (-7.47 %)