Ciechanover Isaac E.

Insider CIK 1612096 · ATRA Chief Executive Officer, Director

Track record PRO

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Track record

See how this insider's past purchases performed 30 and 90 days later, and a conviction score on each buy.

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Trades across companies

Ticker	Code	Trade	Filed	Shares	Price	Value	Owned after
ATRA Atara Biotherapeutics, Inc	S Sale	2019-05-30	2019-05-31	1,500	$23.70	$35.5K	290,687	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-05-30	2019-05-31	1,425	$22.72	$32.4K	292,187	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-05-29	2019-05-31	725	$23.30	$16.9K	293,612	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-05-29	2019-05-31	2,200	$22.85	$50.3K	294,337	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-05-14	2019-05-15	3,900	$24.92	$97.2K	296,537	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-05-13	2019-05-15	3,500	$24.23	$84.8K	300,837	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-05-13	2019-05-15	400	$24.95	$10.0K	300,437	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-04-26	2019-04-29	3,900	$33.47	$130.5K	304,337	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-04-25	2019-04-29	3,600	$33.57	$120.9K	308,537	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-04-25	2019-04-29	300	$33.99	$10.2K	308,237	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-04-11	2019-04-12	3,900	$36.27	$141.5K	312,137	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-04-10	2019-04-12	3,900	$37.04	$144.5K	316,037	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-03-29	2019-04-01	3,700	$39.81	$147.3K	320,137	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-03-29	2019-04-01	200	$41.70	$8.3K	319,937	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-03-28	2019-04-01	1,600	$38.02	$60.8K	324,137	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-03-28	2019-04-01	2,000	$36.75	$73.5K	325,737	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-03-28	2019-04-01	300	$38.59	$11.6K	323,837	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-03-15	2019-03-18	3,900	$38.73	$151.0K	327,737	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-03-14	2019-03-18	700	$39.10	$27.4K	334,837	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-03-14	2019-03-18	3,200	$40.48	$129.5K	331,637	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-02-28	2019-03-01	3,900	$36.13	$140.9K	335,537	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-02-27	2019-03-01	3,700	$36.20	$133.9K	339,437	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-02-27	2019-03-01	200	$35.22	$7.0K	343,137	SEC↗
ATRA Atara Biotherapeutics, Inc	F Tax w/h	2019-02-15	2019-02-19	1,176	$40.45	$47.6K	332,243	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-02-12	2019-02-12	3,900	$39.01	$152.1K	342,138	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-02-11	2019-02-12	3,900	$38.52	$150.2K	346,038	SEC↗
ATRA Atara Biotherapeutics, Inc	F Tax w/h	2019-02-09	2019-02-12	20,324	$38.49	$782.3K	334,618	SEC↗
ATRA Atara Biotherapeutics, Inc	F Tax w/h	2019-02-06	2019-02-08	24,683	—	$0	375,611	SEC↗
ATRA Atara Biotherapeutics, Inc	F Tax w/h	2019-02-06	2019-02-12	24,683	$38.47	$949.6K	375,611	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-01-24	2019-01-25	430	$35.82	$15.4K	296,452	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-01-24	2019-01-25	3,470	$34.98	$121.4K	296,882	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-01-23	2019-01-25	3,000	$34.84	$104.5K	301,252	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-01-23	2019-01-25	800	$35.59	$28.5K	300,452	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-01-23	2019-01-25	100	$36.58	$3.7K	300,352	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-01-10	2019-01-10	2,200	$34.50	$75.9K	4,078	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-01-10	2019-01-10	1,700	$33.93	$57.7K	6,278	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-01-09	2019-01-10	2,000	$35.16	$70.3K	7,978	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2019-01-09	2019-01-10	1,900	$34.51	$65.6K	9,978	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-12-28	2018-12-28	500	$35.40	$17.7K	11,878	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-12-28	2018-12-28	3,400	$34.60	$117.6K	12,378	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-12-27	2018-12-28	3,247	$32.82	$106.6K	16,431	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-12-27	2018-12-28	653	$34.19	$22.3K	15,778	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-12-13	2018-12-13	3,900	$42.75	$166.7K	19,678	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-12-12	2018-12-13	3,900	$42.56	$166.0K	23,578	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-11-29	2018-11-29	1,400	$41.13	$57.6K	29,978	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-11-29	2018-11-29	2,500	$42.26	$105.7K	27,478	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-11-28	2018-11-29	1,200	$39.54	$47.4K	31,378	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-11-28	2018-11-29	2,700	$38.65	$104.4K	32,578	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-11-15	2018-11-15	1,100	$34.67	$38.1K	38,078	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-11-15	2018-11-15	2,800	$35.49	$99.4K	35,278	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-11-14	2018-11-15	600	$34.51	$20.7K	39,178	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-11-14	2018-11-15	3,300	$33.89	$111.8K	39,778	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-10-23	2018-10-23	1,400	$33.17	$46.4K	45,578	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-10-23	2018-10-23	1,700	$34.39	$58.5K	43,878	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-10-23	2018-10-23	800	$35.18	$28.1K	43,078	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-10-22	2018-10-23	3,105	$33.66	$104.5K	47,773	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-10-22	2018-10-23	795	$34.26	$27.2K	46,978	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-10-05	2018-10-05	1,900	$39.58	$75.2K	52,878	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-10-05	2018-10-05	100	$41.00	$4.1K	50,878	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-10-05	2018-10-05	1,900	$40.25	$76.5K	50,978	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-10-04	2018-10-05	1,300	$41.34	$53.7K	54,778	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-10-04	2018-10-05	2,600	$40.09	$104.2K	56,078	SEC↗
ATRA Atara Biotherapeutics, Inc	F Tax w/h	2018-09-22	2018-09-25	79,328	$39.85	$3.16M	733,285	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-09-19	2018-09-20	3,900	$39.99	$156.0K	58,678	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-09-18	2018-09-20	3,900	$39.62	$154.5K	62,578	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-09-07	2018-09-10	2,073	$39.74	$82.4K	68,305	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-09-07	2018-09-10	1,827	$40.23	$73.5K	66,478	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-09-06	2018-09-10	1,120	$39.42	$44.2K	70,378	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-09-06	2018-09-10	2,780	$38.45	$106.9K	71,498	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-08-21	2018-08-22	3,900	$36.69	$143.1K	74,278	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-08-20	2018-08-22	3,900	$36.04	$140.6K	78,178	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-08-07	2018-08-07	300	$37.75	$11.3K	82,078	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-08-07	2018-08-07	3,600	$37.35	$134.5K	82,378	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-08-06	2018-08-07	3,900	$37.48	$146.2K	85,978	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-07-27	2018-07-30	1,700	$37.53	$63.8K	89,878	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-07-27	2018-07-30	2,200	$36.55	$80.4K	91,578	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-07-26	2018-07-30	100	$39.45	$3.9K	93,778	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-07-26	2018-07-30	3,800	$39.02	$148.3K	93,878	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-07-10	2018-07-11	22,300	$39.93	$890.4K	103,778	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-07-10	2018-07-11	6,100	$40.54	$247.3K	97,678	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-07-09	2018-07-11	2,141	$40.63	$87.0K	126,078	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-07-09	2018-07-11	27,859	$39.88	$1.11M	128,219	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-06-27	2018-06-27	1,500	$37.57	$56.4K	156,578	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-06-27	2018-06-27	500	$39.40	$19.7K	156,078	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-06-26	2018-06-27	2,700	$40.01	$108.0K	159,778	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-06-26	2018-06-27	1,700	$40.79	$69.3K	158,078	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-06-06	2018-06-06	1,500	$47.69	$71.5K	163,478	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-06-06	2018-06-06	1,900	$46.53	$88.4K	164,978	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-06-06	2018-06-06	1,000	$48.59	$48.6K	162,478	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-06-05	2018-06-06	1,200	$50.27	$60.3K	166,878	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-06-05	2018-06-06	3,200	$49.51	$158.4K	168,078	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-05-22	2018-05-22	4,400	$50.88	$223.9K	171,278	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-05-21	2018-05-22	2,000	$52.83	$105.7K	176,578	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-05-21	2018-05-22	900	$53.64	$48.3K	175,678	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-05-21	2018-05-22	1,500	$51.67	$77.5K	178,578	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-05-10	2018-05-10	2,200	$40.98	$90.2K	180,078	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-05-10	2018-05-10	2,200	$40.08	$88.2K	182,278	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-05-09	2018-05-10	1,300	$38.35	$49.9K	187,578	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-05-09	2018-05-10	3,100	$39.50	$122.5K	184,478	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-04-27	2018-04-30	500	$43.95	$22.0K	188,878	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-04-27	2018-04-30	3,900	$42.63	$166.3K	189,378	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-04-26	2018-04-30	1,100	$42.60	$46.9K	193,278	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-04-26	2018-04-30	3,300	$41.99	$138.6K	194,378	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-04-12	2018-04-12	3,200	$42.63	$136.4K	198,878	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-04-12	2018-04-12	1,200	$43.69	$52.4K	197,678	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-04-11	2018-04-12	4,000	$40.77	$163.1K	202,478	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-04-11	2018-04-12	400	$41.37	$16.5K	202,078	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-03-27	2018-04-03	200	$38.40	$7.7K	206,478	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-03-27	2018-03-27	2,700	$36.63	$98.9K	208,178	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-03-27	2018-03-27	200	$38.40	$7.7K	206,478	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-03-27	2018-03-27	1,500	$37.68	$56.5K	206,678	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-03-26	2018-03-27	3,200	$39.72	$127.1K	212,078	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-03-26	2018-03-27	1,200	$41.12	$49.3K	210,878	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-03-16	2018-03-19	1,300	$42.59	$55.4K	215,278	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-03-16	2018-03-19	3,100	$41.75	$129.4K	216,578	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-03-15	2018-03-19	2,800	$41.87	$117.2K	221,278	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-03-15	2018-03-19	1,600	$42.95	$68.7K	219,678	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-03-12	2018-03-14	700	$46.17	$32.3K	224,378	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-03-12	2018-03-14	300	$46.65	$14.0K	224,078	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-02-22	2018-02-22	1,600	$44.03	$70.4K	226,478	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-02-22	2018-02-22	1,400	$45.00	$63.0K	225,078	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-02-22	2018-02-22	1,600	$42.74	$68.4K	228,078	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-02-21	2018-02-22	1,589	$43.60	$69.3K	232,589	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-02-21	2018-02-22	2,911	$44.55	$129.7K	229,678	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-02-20	2018-02-22	8,700	$45.28	$393.9K	234,178	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-02-16	2018-02-20	5,100	$47.91	$244.3K	243,178	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-02-16	2018-02-20	1,600	$46.55	$74.5K	248,278	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-02-16	2018-02-20	3,000	$45.44	$136.3K	249,878	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-02-16	2018-02-20	300	$48.43	$14.5K	242,878	SEC↗
ATRA Atara Biotherapeutics, Inc	M Exercise deriv	2018-02-15	2018-02-20	3,938	—	$0	0	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-02-15	2018-02-20	4,767	$47.56	$226.7K	253,178	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-02-15	2018-02-20	2,433	$46.71	$113.6K	257,945	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-02-15	2018-02-20	2,500	$45.58	$114.0K	260,378	SEC↗
ATRA Atara Biotherapeutics, Inc	M Exercise	2018-02-15	2018-02-20	3,938	—	$0	812,613	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-02-15	2018-02-20	300	$48.25	$14.5K	252,878	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-02-14	2018-02-14	1,000	$46.94	$46.9K	271,778	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-02-14	2018-02-14	100	$45.05	$4.5K	272,778	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-02-14	2018-02-14	5,800	$48.42	$280.8K	265,978	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-02-14	2018-02-14	3,100	$49.25	$152.7K	262,878	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-02-13	2018-02-14	10,000	$45.10	$451.0K	272,878	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-02-09	2018-02-12	1,100	$37.43	$41.2K	283,978	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-02-09	2018-02-12	400	$38.68	$15.5K	283,578	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-02-09	2018-02-12	400	$40.79	$16.3K	283,178	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-02-09	2018-02-12	300	$41.70	$12.5K	282,878	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-02-09	2018-02-12	2,200	$36.59	$80.5K	285,078	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-02-08	2018-02-12	4,400	$37.15	$163.5K	287,278	SEC↗
ATRA Atara Biotherapeutics, Inc	A Award deriv	2018-02-06	2018-02-08	130,000	—	$0	130,000	SEC↗
ATRA Atara Biotherapeutics, Inc	A Award	2018-02-06	2018-02-08	65,000	—	$0	808,675	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-01-26	2018-01-29	2,100	$36.98	$77.7K	291,678	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-01-26	2018-01-29	6,100	$36.54	$222.9K	293,778	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-01-26	2018-01-29	1,100	$35.46	$39.0K	299,878	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-01-25	2018-01-29	200	$34.68	$6.9K	300,978	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-01-25	2018-01-29	8,400	$34.23	$287.5K	301,178	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-01-25	2018-01-29	1,400	$33.22	$46.5K	309,578	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-01-24	2018-01-24	4,100	$34.40	$141.0K	313,178	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-01-24	2018-01-24	2,200	$34.99	$77.0K	310,978	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-01-24	2018-01-24	8,100	$33.20	$268.9K	317,278	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-01-23	2018-01-24	8,516	$36.15	$307.9K	325,378	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-01-23	2018-01-24	15,084	$35.45	$534.7K	333,894	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-01-23	2018-01-24	500	$34.05	$17.0K	348,978	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-01-22	2018-01-24	1,000	$32.17	$32.2K	357,978	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-01-22	2018-01-24	6,500	$33.08	$215.0K	351,478	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-01-22	2018-01-24	2,000	$34.04	$68.1K	349,478	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-01-22	2018-01-24	500	$30.93	$15.5K	358,978	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-01-16	2018-01-18	600	$30.38	$18.2K	359,478	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-01-12	2018-01-12	100	$30.05	$3.0K	360,078	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-01-11	2018-01-12	2,500	$21.49	$53.7K	377,678	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-01-11	2018-01-12	17,500	$22.01	$385.2K	360,178	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-01-10	2018-01-12	4,500	$19.64	$88.4K	384,278	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2018-01-10	2018-01-12	4,100	$20.38	$83.6K	380,178	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-12-29	2018-01-02	2,900	$19.04	$55.2K	391,478	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-12-29	2018-01-02	2,700	$20.28	$54.8K	388,778	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-12-29	2018-01-02	14,400	$18.24	$262.7K	394,378	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-12-28	2018-01-02	2,200	$15.15	$33.3K	408,778	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-12-13	2017-12-14	2,200	$14.73	$32.4K	410,978	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-12-12	2017-12-14	2,200	$14.56	$32.0K	413,178	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-11-30	2017-12-01	2,200	$14.40	$31.7K	415,378	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-11-29	2017-12-01	2,200	$14.09	$31.0K	417,578	SEC↗
ATRA Atara Biotherapeutics, Inc	M Exercise deriv	2017-11-15	2017-11-17	5,908	—	$0	3,938	SEC↗
ATRA Atara Biotherapeutics, Inc	M Exercise	2017-11-15	2017-11-17	5,908	—	$0	743,675	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-11-14	2017-11-14	2,200	$13.41	$29.5K	419,778	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-11-13	2017-11-14	2,200	$13.53	$29.8K	421,978	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-10-27	2017-10-30	2,200	$13.60	$29.9K	424,178	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-10-26	2017-10-30	2,200	$13.57	$29.9K	426,378	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-10-12	2017-10-12	2,200	$14.78	$32.5K	428,578	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-10-11	2017-10-12	2,200	$15.25	$33.5K	430,778	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-09-20	2017-09-21	2,200	$15.56	$34.2K	432,978	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-09-19	2017-09-21	2,200	$15.51	$34.1K	435,178	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-09-07	2017-09-08	2,200	$14.98	$33.0K	437,378	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-09-06	2017-09-08	2,200	$15.05	$33.1K	439,578	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-08-23	2017-08-24	2,200	$13.51	$29.7K	441,778	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-08-22	2017-08-24	2,200	$13.56	$29.8K	443,978	SEC↗
ATRA Atara Biotherapeutics, Inc	M Exercise deriv	2017-08-15	2017-08-17	5,908	—	$0	9,846	SEC↗
ATRA Atara Biotherapeutics, Inc	M Exercise	2017-08-15	2017-08-17	5,908	—	$0	737,767	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-08-11	2017-08-14	2,200	$14.58	$32.1K	446,178	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-08-10	2017-08-14	2,200	$14.75	$32.5K	448,378	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-07-25	2017-07-26	2,500	$15.97	$39.9K	450,778	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-07-25	2017-07-26	200	$16.79	$3.4K	450,578	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-07-24	2017-07-26	300	$17.32	$5.2K	453,278	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-07-24	2017-07-26	2,500	$16.89	$42.2K	453,578	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-05-31	2017-05-31	3,450	$13.26	$45.7K	456,078	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-05-30	2017-05-31	3,450	$13.44	$46.4K	459,528	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-05-18	2017-05-19	2,400	$14.94	$35.9K	462,978	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-05-17	2017-05-19	2,400	$14.88	$35.7K	465,378	SEC↗
ATRA Atara Biotherapeutics, Inc	M Exercise deriv	2017-05-15	2017-05-17	5,908	—	$0	15,754	SEC↗
ATRA Atara Biotherapeutics, Inc	M Exercise	2017-05-15	2017-05-17	5,908	—	$0	731,859	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-04-26	2017-04-26	3,600	$17.78	$64.0K	467,778	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-04-25	2017-04-26	1,500	$17.70	$26.6K	471,378	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-04-25	2017-04-26	2,100	$17.07	$35.8K	472,878	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-04-11	2017-04-12	4,200	$16.99	$71.4K	474,978	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-04-10	2017-04-12	3,000	$17.08	$51.2K	479,178	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-03-28	2017-03-28	3,182	$18.99	$60.4K	482,596	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-03-28	2017-03-28	418	$19.86	$8.3K	482,178	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-03-27	2017-03-28	12,400	$20.34	$252.2K	485,778	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-03-17	2017-03-20	2,400	$18.50	$44.4K	515,778	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-03-17	2017-03-20	17,600	$20.01	$352.2K	498,178	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-03-16	2017-03-20	10,800	$18.54	$200.2K	518,178	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-02-16	2017-02-16	2,400	$15.57	$37.4K	348,978	SEC↗
ATRA Atara Biotherapeutics, Inc	M Exercise deriv	2017-02-15	2017-02-16	5,907	—	$0	21,662	SEC↗
ATRA Atara Biotherapeutics, Inc	M Exercise	2017-02-15	2017-02-16	5,907	—	$0	725,951	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-02-15	2017-02-16	2,400	$15.54	$37.3K	351,378	SEC↗
ATRA Atara Biotherapeutics, Inc	A Award	2017-02-06	2017-02-08	165,000	—	$0	720,044	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-02-03	2017-02-06	2,400	$13.87	$33.3K	353,778	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-02-02	2017-02-06	2,400	$13.45	$32.3K	356,178	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-01-18	2017-01-19	2,400	$14.47	$34.7K	358,578	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-01-17	2017-01-19	3,600	$14.08	$50.7K	360,978	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-01-06	2017-01-09	6,000	$17.10	$102.6K	364,578	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2017-01-05	2017-01-09	2,400	$16.36	$39.3K	370,578	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-12-23	2016-12-23	2,400	$15.25	$36.6K	372,978	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-12-22	2016-12-23	2,300	$15.17	$34.9K	375,478	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-12-22	2016-12-23	100	$15.82	$1.6K	375,378	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-12-07	2016-12-08	3,600	$17.30	$62.3K	377,778	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-12-06	2016-12-08	3,600	$18.55	$66.8K	381,378	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-11-23	2016-11-23	2,500	$18.40	$46.0K	386,078	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-11-23	2016-11-23	1,100	$19.22	$21.1K	384,978	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-11-22	2016-11-23	8,400	$18.21	$153.0K	388,578	SEC↗
ATRA Atara Biotherapeutics, Inc	M Exercise deriv	2016-11-15	2016-11-17	5,908	—	$0	27,569	SEC↗
ATRA Atara Biotherapeutics, Inc	M Exercise	2016-11-15	2016-11-17	5,908	—	$0	555,044	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-10-27	2016-10-28	2,400	$13.70	$32.9K	396,978	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-10-26	2016-10-28	2,400	$13.91	$33.4K	399,378	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-10-14	2016-10-17	2,400	$16.01	$38.4K	401,778	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-10-13	2016-10-17	2,400	$15.91	$38.2K	404,178	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-09-28	2016-09-29	4,500	$21.40	$96.3K	406,878	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-09-28	2016-09-29	300	$21.82	$6.5K	406,578	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-09-27	2016-09-29	7,200	$20.50	$147.6K	411,378	SEC↗
ATRA Atara Biotherapeutics, Inc	A Award	2016-09-22	2016-09-23	320,000	—	$0	549,136	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-09-16	2016-09-19	3,600	$19.32	$69.6K	418,578	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-09-15	2016-09-19	3,600	$19.39	$69.8K	422,178	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-08-23	2016-08-23	4,800	$22.08	$106.0K	425,778	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-08-22	2016-08-23	4,800	$22.58	$108.4K	430,578	SEC↗
ATRA Atara Biotherapeutics, Inc	M Exercise deriv	2016-08-15	2016-08-17	5,908	—	$0	33,477	SEC↗
ATRA Atara Biotherapeutics, Inc	M Exercise	2016-08-15	2016-08-17	5,908	—	$0	229,136	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-07-21	2016-07-21	4,800	$22.22	$106.7K	315,511	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-07-20	2016-07-21	4,800	$21.99	$105.6K	320,311	SEC↗
ATRA Atara Biotherapeutics, Inc	G Gift	2016-07-13	2016-08-17	330,957	—	$0	0	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-07-08	2016-07-11	4,800	$22.96	$110.2K	325,111	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-07-07	2016-07-11	4,800	$22.80	$109.4K	329,911	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-06-24	2016-06-27	4,800	$21.32	$102.3K	334,711	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-06-23	2016-06-27	4,800	$21.19	$101.7K	339,511	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-06-08	2016-06-08	4,800	$20.79	$99.8K	344,311	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-06-07	2016-06-08	1,200	$20.90	$25.1K	349,111	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-06-07	2016-06-08	6,000	$20.25	$121.5K	350,311	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-05-26	2016-05-27	3,600	$17.35	$62.5K	356,311	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-05-25	2016-05-27	3,600	$18.03	$64.9K	359,911	SEC↗
ATRA Atara Biotherapeutics, Inc	M Exercise deriv	2016-05-16	2016-05-18	5,907	—	$0	39,385	SEC↗
ATRA Atara Biotherapeutics, Inc	M Exercise	2016-05-16	2016-05-18	5,907	—	$0	223,228	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-04-26	2016-04-26	100	$20.15	$2.0K	363,511	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-04-25	2016-04-26	1,200	$20.12	$24.1K	363,611	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-04-12	2016-04-13	1,200	$20.20	$24.2K	364,811	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-04-11	2016-04-13	12,010	$20.42	$245.2K	366,011	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-04-01	2016-04-04	890	$20.04	$17.8K	378,021	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-03-31	2016-04-04	300	$20.01	$6.0K	378,911	SEC↗
ATRA Atara Biotherapeutics, Inc	M Exercise deriv	2016-02-16	2016-02-18	5,908	—	$0	45,292	SEC↗
ATRA Atara Biotherapeutics, Inc	M Exercise	2016-02-16	2016-02-18	5,908	—	$0	217,321	SEC↗
ATRA Atara Biotherapeutics, Inc	A Award	2016-02-09	2016-02-11	163,973	—	$0	211,413	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-01-14	2016-01-15	1,200	$20.07	$24.1K	379,211	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2016-01-13	2016-01-15	1,200	$20.32	$24.4K	380,411	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2015-12-31	2016-01-04	800	$27.17	$21.7K	381,611	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2015-12-31	2016-01-04	400	$26.00	$10.4K	382,411	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2015-12-30	2016-01-04	1,200	$25.21	$30.3K	382,811	SEC↗
ATRA Atara Biotherapeutics, Inc	A Award deriv	2015-12-17	2015-12-21	220,000	—	$0	220,000	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2015-12-15	2015-12-16	700	$21.55	$15.1K	384,211	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2015-12-15	2015-12-16	300	$20.69	$6.2K	384,911	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2015-12-15	2015-12-16	200	$22.21	$4.4K	384,011	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2015-12-14	2015-12-16	400	$24.93	$10.0K	385,311	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2015-12-14	2015-12-16	300	$23.34	$7.0K	385,711	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2015-12-14	2015-12-16	400	$21.54	$8.6K	386,011	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2015-12-14	2015-12-16	100	$25.84	$2.6K	385,211	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2015-12-04	2015-12-07	1,200	$37.93	$45.5K	386,411	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2015-12-04	2015-12-07	800	$36.99	$29.6K	387,611	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2015-12-03	2015-12-07	700	$36.21	$25.3K	389,711	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2015-12-03	2015-12-07	600	$38.54	$23.1K	388,411	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2015-12-03	2015-12-07	700	$37.43	$26.2K	389,011	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2015-11-24	2015-11-25	200	$36.71	$7.3K	390,411	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2015-11-24	2015-11-25	900	$34.81	$31.3K	391,511	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2015-11-24	2015-11-25	900	$35.80	$32.2K	390,611	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2015-11-23	2015-11-25	2,800	$34.74	$97.3K	392,411	SEC↗
ATRA Atara Biotherapeutics, Inc	M Exercise deriv	2015-11-16	2015-11-18	5,908	—	$0	51,200	SEC↗
ATRA Atara Biotherapeutics, Inc	M Exercise	2015-11-16	2015-11-18	5,908	—	$0	47,440	SEC↗
ATRA Atara Biotherapeutics, Inc	S Sale	2015-10-22	2015-10-23	1,000	$24.36	$24.4K	395,411	SEC↗