Ciechanover Isaac E. - Insider Trading Tracker

アタラ・バイオセラピューティクス社

US ˙ NasdaqGS

はじめに

このページでは、Ciechanover Isaac E.の既知の内部者取引履歴の包括的な分析を提供します。内部者取引を次のチャートに示します。内部者とは、会社の役員、取締役、または重要な投資家のことです。一般的に、内部者が重要な非公開情報に基づいて自社の取引を行うことは一般的に違法です。これは、彼らが自分の会社で取引をすることが違法であるという意味ではありません。ただし、すべての取引をフォーム4を通じてSECに報告しなければなりません。このような制約があるにもかかわらず、学術研究によると、内部者は一般的に、自分の会社の市場を上回るパフォーマンスを発揮する傾向があります。

平均取引収益性

平均取引収益性は、過去3年間に内部者が行ったすべての公開市場での購入の平均収益率です。このリストを生成するために、10b5-1取引計画の一部としてマークされたすべての取引を除いて、内部者が行ったすべての公開市場での計画外の購入を調べます。次に、3、6、および12か月にわたるこれらの取引の平均パフォーマンスを計算し、各期間を平均して、各取引の最終的なパフォーマンス指標を生成します。最後に、内部者のパフォーマンスメトリックを計算するために、すべてのパフォーマンスメトリックを平均します。このリストには、過去2年間に少なくとも3回の取引を行った内部者のみが含まれています。

この内部者取引の収益性が「N/A」の場合、インサイダーは過去3年間に公開市場での購入を行っていないか、または行った取引が最近すぎて信頼できるパフォーマンス指標を計算できません。

更新頻度: 1日

収益性の高い内部者トレーダーのリストを見る。

ランキングの高い内部者を見る

内部者ポジションの報告がある企業

SECへの提出書類によると、Ciechanover Isaac E.は以下の企業の保有または取引を報告しています：

証券	タイトル	最新の保有報告書
US:ATRA / Atara Biotherapeutics, Inc.	Chief Executive Officer, Director	290,687

チャートの見方

次のチャートは、Ciechanover Isaac E.が行った各公開市場の非計画取引後の証券の株価パフォーマンスを示しています。非計画取引とは、10b5-1取引計画の一部として行われなかった取引のことです。株価のパフォーマンスは、株価の累積変化率としてグラフ化されます。たとえば、2019年1月1日に内部者取引が行われた場合、チャートには現在までの証券の日割り変化が表示されます。この間に株価が10ドルから15ドルに上昇した場合、株価の累積変化率は50%となる。価格を10ドルから20ドルに変更すると100%、10ドルから5ドルに変更すると-50%になります。

最終的には、内部者が内部者情報から利益を得るために取引のタイミングを計っているかどうかを確認するために、内部者の取引が株価の超過リターン (プラスまたはマイナス) と、どの程度密接に関連しているかを判断しようとしています。内部者がこれを行っていた状況を考えてみましょう。この状況では、 (a) 購入後のプラスのリターン、または (b) 販売後のマイナスのリターンのいずれかが期待されます。(a) の場合、購入チャートは一連の上向きの曲線を示し、各購入トランザクションの後にプラスのリターンを示します。(b) の場合、販売チャートは一連の下向きの傾斜曲線を示し、各販売取引の後にマイナスのリターンを示します。

しかし、これだけでは結論を導き出すことはできません。例えば、その企業の株価が何年にもわたって非循環的に上昇していた場合、買収後のすべてのプロットは上昇傾向にあると予想されます。同様に、長年にわたる非循環的な下落は、貿易後のプロットを下方に傾斜させます。いずれのチャートもインサイダー取引を示唆するものでありません。

最も強力な指標は、株価が非常に循環的であり、購入チャートにプラスのシグナルがあり、販売チャートにマイナスのプロットがある状況です。この状況は、財務上の利点のために取引のタイミングを計っていた内部者を強く示唆するでしょう。

内部者購入ATRA / Atara Biotherapeutics, Inc. - 短期利益分析

このセクションでは、ATRA / Atara Biotherapeutics, Inc.で行われたすべての計画外の公開市場内部者購入の収益性を分析します。この分析は、内部者が一貫して異常なリターンを生成しているかどうかを理解するのに役立ちます。この分析は各取引後1年間のものであり、結果は理論的なものです。

次の表は、自動売買プランに含まれていない直近の公開市場買付を示しています。

取引日	ティッカー	内部者	レポート株式数	レポート価格	調整後株式数	調整後価格	費用基準	最大日数	最大価格	最大利益 ($)	最大リターン (%)
この内部者とセキュリティの組み合わせに、計画外のオープンマーケット取引は知られていません

調整後価格は、分割調整後価格です。調整後株式数は、分割調整後株式数です。

ATRA / Atara Biotherapeutics, Inc. Insider Trades

内部者売却ATRA / Atara Biotherapeutics, Inc.-短期損失分析

このセクションでは、ATRA / Atara Biotherapeutics, Inc.で行われたすべての予定外の公開市場の内部者取引の短期損失回避を分析します。損失回避の一貫したパターンは、将来の売却取引が価格の下落を予測する可能性を示唆しているかもしれません。この分析は各取引後1年間のものであり、結果は理論的なものです。

次の表は、自動取引プランに含まれていない直近の公開市場での売買を示しています。

取引日	ティッカー	内部者	レポート株式数	レポート価格	調整後株式数	調整後価格	費用基準	最小日数	最小価格	最大損失回避 ($)	最大損失回避 (%)
この内部者とセキュリティの組み合わせに、計画外のオープンマーケット取引は知られていません

調整後価格は、分割調整後価格です。調整後株式数は、分割調整後株式数です。

内部取引の履歴

この表は、証券取引委員会 (SEC) に開示されたCiechanover Isaac E.による内部者取引の完全なリストを示しています。

提出日	取引日	フォーム	ティッカー	証券	コード	10b5-1	株式数	残り株式数	変動率	株式価格	取引価格	残り価値
2019-05-31	2019-05-30	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,500	290,687	-0.51	23.70	-35,550	6,889,282
2019-05-31	2019-05-30	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,425	292,187	-0.49	22.72	-32,376	6,638,489
2019-05-31	2019-05-29	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-725	293,612	-0.25	23.30	-16,892	6,841,160
2019-05-31	2019-05-29	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,200	294,337	-0.74	22.85	-50,270	6,725,600
2019-05-15	2019-05-14	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,900	296,537	-1.30	24.92	-97,188	7,389,702
2019-05-15	2019-05-13	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-400	300,437	-0.13	24.95	-9,980	7,495,903
2019-05-15	2019-05-13	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,500	300,837	-1.15	24.23	-84,805	7,289,281
2019-04-29	2019-04-26	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,900	304,337	-1.27	33.47	-130,533	10,186,159
2019-04-29	2019-04-25	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-300	308,237	-0.10	33.99	-10,197	10,476,976
2019-04-29	2019-04-25	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,600	308,537	-1.15	33.57	-120,852	10,357,587
2019-04-12	2019-04-11	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,900	312,137	-1.23	36.27	-141,453	11,321,209
2019-04-12	2019-04-10	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,900	316,037	-1.22	37.04	-144,456	11,706,010
2019-04-01	2019-03-29	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-200	319,937	-0.06	41.70	-8,340	13,341,373
2019-04-01	2019-03-29	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,700	320,137	-1.14	39.81	-147,297	12,744,654
2019-04-01	2019-03-28	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-300	323,837	-0.09	38.59	-11,577	12,496,870
2019-04-01	2019-03-28	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,600	324,137	-0.49	38.02	-60,832	12,323,689
2019-04-01	2019-03-28	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,000	325,737	-0.61	36.75	-73,500	11,970,835
2019-03-18	2019-03-15	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,900	327,737	-1.18	38.73	-151,047	12,693,254
2019-03-18	2019-03-14	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,200	331,637	-0.96	40.48	-129,536	13,424,666
2019-03-18	2019-03-14	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-700	334,837	-0.21	39.10	-27,370	13,092,127
2019-03-01	2019-02-28	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,900	335,537	-1.15	36.13	-140,907	12,122,952
2019-03-01	2019-02-27	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,700	339,437	-1.08	36.20	-133,940	12,287,619
2019-03-01	2019-02-27	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-200	343,137	-0.06	35.22	-7,044	12,085,285
2019-02-19	2019-02-15	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	F - Taxes		-1,176	332,243	-0.35	40.45	-47,569	13,439,229
2019-02-12	2019-02-12	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,900	342,138	-1.13	39.01	-152,139	13,346,803
2019-02-12	2019-02-11	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,900	346,038	-1.11	38.52	-150,228	13,329,384
2019-02-12	2019-02-09	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	F - Taxes		-20,324	334,618	-5.73	38.49	-782,271	12,879,447
2019-02-12	2019-02-06	4/A	ATRA	Atara Biotherapeutics, Inc. Common Stock	F - Taxes		-24,683	375,611	-6.17	38.47	-949,555	14,449,755
2019-02-08	2019-02-06	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	F - Taxes		-24,683	375,611	-6.17
2019-01-25	2019-01-24	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-430	296,452	-0.14	35.82	-15,403	10,618,911
2019-01-25	2019-01-24	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,470	296,882	-1.16	34.98	-121,381	10,384,932
2019-01-25	2019-01-23	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-100	300,352	-0.03	36.58	-3,658	10,986,876
2019-01-25	2019-01-23	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-800	300,452	-0.27	35.59	-28,472	10,693,087
2019-01-25	2019-01-23	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,000	301,252	-0.99	34.84	-104,520	10,495,620
2019-01-10	2019-01-10	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,200	4,078	-35.04	34.50	-75,900	140,691
2019-01-10	2019-01-10	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,700	6,278	-21.31	33.93	-57,681	213,013
2019-01-10	2019-01-09	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,000	7,978	-20.04	35.16	-70,320	280,506
2019-01-10	2019-01-09	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,900	9,978	-16.00	34.51	-65,569	344,341
2018-12-28	2018-12-28	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-500	11,878	-4.04	35.40	-17,700	420,481
2018-12-28	2018-12-28	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,400	12,378	-21.55	34.60	-117,640	428,279
2018-12-28	2018-12-27	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-653	15,778	-3.97	34.19	-22,326	539,450
2018-12-28	2018-12-27	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,247	16,431	-16.50	32.82	-106,567	539,265
2018-12-13	2018-12-13	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,900	19,678	-16.54	42.75	-166,725	841,234
2018-12-13	2018-12-12	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,900	23,578	-14.19	42.56	-165,984	1,003,480
2018-11-29	2018-11-29	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,500	27,478	-8.34	42.26	-105,650	1,161,220
2018-11-29	2018-11-29	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,400	29,978	-4.46	41.13	-57,582	1,232,995
2018-11-29	2018-11-28	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,200	31,378	-3.68	39.54	-47,448	1,240,686
2018-11-29	2018-11-28	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,700	32,578	-7.65	38.65	-104,355	1,259,140
2018-11-15	2018-11-15	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,800	35,278	-7.35	35.49	-99,372	1,252,016
2018-11-15	2018-11-15	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,100	38,078	-2.81	34.67	-38,137	1,320,164
2018-11-15	2018-11-14	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-600	39,178	-1.51	34.51	-20,706	1,352,033
2018-11-15	2018-11-14	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,300	39,778	-7.66	33.89	-111,837	1,348,076
2018-10-23	2018-10-23	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-800	43,078	-1.82	35.18	-28,144	1,515,484
2018-10-23	2018-10-23	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,700	43,878	-3.73	34.39	-58,463	1,508,964
2018-10-23	2018-10-23	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,400	45,578	-2.98	33.17	-46,438	1,511,822
2018-10-23	2018-10-22	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-795	46,978	-1.66	34.26	-27,237	1,609,466
2018-10-23	2018-10-22	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,105	47,773	-6.10	33.66	-104,514	1,608,039
2018-10-05	2018-10-05	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-100	50,878	-0.20	41.00	-4,100	2,085,998
2018-10-05	2018-10-05	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,900	50,978	-3.59	40.25	-76,475	2,051,864
2018-10-05	2018-10-05	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,900	52,878	-3.47	39.58	-75,202	2,092,911
2018-10-05	2018-10-04	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,300	54,778	-2.32	41.34	-53,742	2,264,523
2018-10-05	2018-10-04	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,600	56,078	-4.43	40.09	-104,234	2,248,167
2018-09-25	2018-09-22	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	F - Taxes		-79,328	733,285	-9.76	39.85	-3,161,221	29,221,407
2018-09-20	2018-09-19	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,900	58,678	-6.23	39.99	-155,961	2,346,533
2018-09-20	2018-09-18	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,900	62,578	-5.87	39.62	-154,518	2,479,340
2018-09-10	2018-09-07	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,827	66,478	-2.67	40.23	-73,500	2,674,410
2018-09-10	2018-09-07	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,073	68,305	-2.95	39.74	-82,381	2,714,441
2018-09-10	2018-09-06	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,120	70,378	-1.57	39.42	-44,150	2,774,301
2018-09-10	2018-09-06	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,780	71,498	-3.74	38.45	-106,891	2,749,098
2018-08-22	2018-08-21	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,900	74,278	-4.99	36.69	-143,091	2,725,260
2018-08-22	2018-08-20	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,900	78,178	-4.75	36.04	-140,556	2,817,535
2018-08-07	2018-08-07	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-300	82,078	-0.36	37.75	-11,325	3,098,444
2018-08-07	2018-08-07	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,600	82,378	-4.19	37.35	-134,460	3,076,818
2018-08-07	2018-08-06	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,900	85,978	-4.34	37.48	-146,172	3,222,455
2018-07-30	2018-07-27	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,700	89,878	-1.86	37.53	-63,801	3,373,121
2018-07-30	2018-07-27	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,200	91,578	-2.35	36.55	-80,410	3,347,176
2018-07-30	2018-07-26	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-100	93,778	-0.11	39.45	-3,945	3,699,542
2018-07-30	2018-07-26	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,800	93,878	-3.89	39.02	-148,276	3,663,120
2018-07-11	2018-07-10	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-6,100	97,678	-5.88	40.54	-247,294	3,959,866
2018-07-11	2018-07-10	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-22,300	103,778	-17.69	39.93	-890,439	4,143,856
2018-07-11	2018-07-09	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,141	126,078	-1.67	40.63	-86,989	5,122,549
2018-07-11	2018-07-09	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-27,859	128,219	-17.85	39.88	-1,111,017	5,113,374
2018-06-27	2018-06-27	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-500	156,078	-0.32	39.40	-19,700	6,149,473
2018-06-27	2018-06-27	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,500	156,578	-0.95	37.57	-56,355	5,882,635
2018-06-27	2018-06-26	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,700	158,078	-1.06	40.79	-69,343	6,448,002
2018-06-27	2018-06-26	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,700	159,778	-1.66	40.01	-108,027	6,392,718
2018-06-06	2018-06-06	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,000	162,478	-0.61	48.59	-48,590	7,894,806
2018-06-06	2018-06-06	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,500	163,478	-0.91	47.69	-71,535	7,796,266
2018-06-06	2018-06-06	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,900	164,978	-1.14	46.53	-88,407	7,676,426
2018-06-06	2018-06-05	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,200	166,878	-0.71	50.27	-60,324	8,388,957
2018-06-06	2018-06-05	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,200	168,078	-1.87	49.51	-158,432	8,321,542
2018-05-22	2018-05-22	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-4,400	171,278	-2.50	50.88	-223,872	8,714,625
2018-05-22	2018-05-21	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-900	175,678	-0.51	53.64	-48,276	9,423,368
2018-05-22	2018-05-21	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,000	176,578	-1.12	52.83	-105,660	9,328,616
2018-05-22	2018-05-21	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,500	178,578	-0.83	51.67	-77,505	9,227,125
2018-05-10	2018-05-10	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,200	180,078	-1.21	40.98	-90,156	7,379,596
2018-05-10	2018-05-10	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,200	182,278	-1.19	40.08	-88,176	7,305,702
2018-05-10	2018-05-09	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,100	184,478	-1.65	39.50	-122,450	7,286,881
2018-05-10	2018-05-09	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,300	187,578	-0.69	38.35	-49,855	7,193,616
2018-04-30	2018-04-27	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-500	188,878	-0.26	43.95	-21,975	8,301,188
2018-04-30	2018-04-27	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,900	189,378	-2.02	42.63	-166,257	8,073,184
2018-04-30	2018-04-26	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,100	193,278	-0.57	42.60	-46,860	8,233,643
2018-04-30	2018-04-26	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,300	194,378	-1.67	41.99	-138,567	8,161,932
2018-04-12	2018-04-12	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,200	197,678	-0.60	43.69	-52,428	8,636,552
2018-04-12	2018-04-12	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,200	198,878	-1.58	42.63	-136,416	8,478,169
2018-04-12	2018-04-11	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-400	202,078	-0.20	41.37	-16,548	8,359,967
2018-04-12	2018-04-11	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-4,000	202,478	-1.94	40.77	-163,080	8,255,028
2018-04-03	2018-03-27	4/A	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-200	206,478	-0.10	38.40	-7,680	7,928,755
2018-03-27	2018-03-27	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-200	206,478	-0.10	38.40	-7,680	7,928,755
2018-03-27	2018-03-27	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,500	206,678	-0.72	37.68	-56,520	7,787,627
2018-03-27	2018-03-27	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,700	208,178	-1.28	36.63	-98,901	7,625,560
2018-03-27	2018-03-26	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,200	210,878	-0.57	41.12	-49,344	8,671,303
2018-03-27	2018-03-26	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,200	212,078	-1.49	39.72	-127,104	8,423,738
2018-03-19	2018-03-16	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,300	215,278	-0.60	42.59	-55,367	9,168,690
2018-03-19	2018-03-16	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,100	216,578	-1.41	41.75	-129,425	9,042,132
2018-03-19	2018-03-15	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,600	219,678	-0.72	42.95	-68,720	9,435,170
2018-03-19	2018-03-15	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,800	221,278	-1.25	41.87	-117,236	9,264,910
2018-03-14	2018-03-12	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-300	224,078	-0.13	46.65	-13,995	10,453,239
2018-03-14	2018-03-12	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-700	224,378	-0.31	46.17	-32,319	10,359,532
2018-02-22	2018-02-22	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,400	225,078	-0.62	45.00	-63,000	10,128,510
2018-02-22	2018-02-22	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,600	226,478	-0.70	44.03	-70,448	9,971,826
2018-02-22	2018-02-22	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,600	228,078	-0.70	42.74	-68,384	9,748,054
2018-02-22	2018-02-21	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,911	229,678	-1.25	44.55	-129,685	10,232,155
2018-02-22	2018-02-21	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,589	232,589	-0.68	43.60	-69,280	10,140,880
2018-02-22	2018-02-20	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-8,700	234,178	-3.58	45.28	-393,936	10,603,580
2018-02-20	2018-02-16	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-300	242,878	-0.12	48.43	-14,529	11,762,582
2018-02-20	2018-02-16	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-5,100	243,178	-2.05	47.91	-244,341	11,650,658
2018-02-20	2018-02-16	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,600	248,278	-0.64	46.55	-74,480	11,557,341
2018-02-20	2018-02-16	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,000	249,878	-1.19	45.44	-136,320	11,354,456
2018-02-20	2018-02-15	4	ATRA	Atara Biotherapeutics, Inc. Restricted Stock Units	M - Exercise		-3,938	0	-100.00
2018-02-20	2018-02-15	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	M - Exercise		3,938	812,613	0.49
2018-02-20	2018-02-15	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-300	252,878	-0.12	48.25	-14,475	12,201,364
2018-02-20	2018-02-15	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-4,767	253,178	-1.85	47.56	-226,719	12,041,146
2018-02-20	2018-02-15	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,433	257,945	-0.93	46.71	-113,645	12,048,611
2018-02-20	2018-02-15	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,500	260,378	-0.95	45.58	-113,950	11,868,029
2018-02-14	2018-02-14	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,100	262,878	-1.17	49.25	-152,675	12,946,742
2018-02-14	2018-02-14	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-5,800	265,978	-2.13	48.42	-280,836	12,878,655
2018-02-14	2018-02-14	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,000	271,778	-0.37	46.94	-46,940	12,757,259
2018-02-14	2018-02-14	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-100	272,778	-0.04	45.05	-4,505	12,288,649
2018-02-14	2018-02-13	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-10,000	272,878	-3.54	45.10	-451,000	12,306,798
2018-02-12	2018-02-09	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-300	282,878	-0.11	41.70	-12,510	11,796,013
2018-02-12	2018-02-09	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-400	283,178	-0.14	40.79	-16,316	11,550,831
2018-02-12	2018-02-09	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-400	283,578	-0.14	38.68	-15,472	10,968,797
2018-02-12	2018-02-09	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,100	283,978	-0.39	37.43	-41,173	10,629,297
2018-02-12	2018-02-09	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,200	285,078	-0.77	36.59	-80,498	10,431,004
2018-02-12	2018-02-08	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-4,400	287,278	-1.51	37.15	-163,460	10,672,378
2018-02-08	2018-02-06	4	ATRA	Atara Biotherapeutics, Inc. Employee Stock Option (Right to Buy)	A - Award		130,000	130,000
2018-02-08	2018-02-06	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	A - Award		65,000	808,675	8.74
2018-01-29	2018-01-26	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,100	291,678	-0.71	36.98	-77,658	10,786,252
2018-01-29	2018-01-26	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-6,100	293,778	-2.03	36.54	-222,894	10,734,648
2018-01-29	2018-01-26	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,100	299,878	-0.37	35.46	-39,006	10,633,674
2018-01-29	2018-01-25	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-200	300,978	-0.07	34.68	-6,936	10,437,917
2018-01-29	2018-01-25	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-8,400	301,178	-2.71	34.23	-287,532	10,309,323
2018-01-29	2018-01-25	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,400	309,578	-0.45	33.22	-46,508	10,284,181
2018-01-24	2018-01-24	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,200	310,978	-0.70	34.99	-76,978	10,881,120
2018-01-24	2018-01-24	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-4,100	313,178	-1.29	34.40	-141,040	10,773,323
2018-01-24	2018-01-24	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-8,100	317,278	-2.49	33.20	-268,920	10,533,630
2018-01-24	2018-01-23	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-8,516	325,378	-2.55	36.15	-307,853	11,762,415
2018-01-24	2018-01-23	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-15,084	333,894	-4.32	35.45	-534,728	11,836,542
2018-01-24	2018-01-23	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-500	348,978	-0.14	34.05	-17,025	11,882,701
2018-01-24	2018-01-22	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,000	349,478	-0.57	34.04	-68,080	11,896,231
2018-01-24	2018-01-22	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-6,500	351,478	-1.82	33.08	-215,020	11,626,892
2018-01-24	2018-01-22	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,000	357,978	-0.28	32.17	-32,170	11,516,152
2018-01-24	2018-01-22	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-500	358,978	-0.14	30.93	-15,465	11,103,190
2018-01-18	2018-01-16	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-600	359,478	-0.17	30.38	-18,228	10,920,942
2018-01-12	2018-01-12	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-100	360,078	-0.03	30.05	-3,005	10,820,344
2018-01-12	2018-01-11	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-17,500	360,178	-4.63	22.01	-385,175	7,927,518
2018-01-12	2018-01-11	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,500	377,678	-0.66	21.49	-53,725	8,116,300
2018-01-12	2018-01-10	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-4,100	380,178	-1.07	20.38	-83,558	7,748,028
2018-01-12	2018-01-10	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-4,500	384,278	-1.16	19.64	-88,380	7,547,220
2018-01-02	2017-12-29	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,700	388,778	-0.69	20.28	-54,756	7,884,418
2018-01-02	2017-12-29	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,900	391,478	-0.74	19.04	-55,216	7,453,741
2018-01-02	2017-12-29	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-14,400	394,378	-3.52	18.24	-262,656	7,193,455
2018-01-02	2017-12-28	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,200	408,778	-0.54	15.15	-33,330	6,192,987
2017-12-14	2017-12-13	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,200	410,978	-0.53	14.73	-32,406	6,053,706
2017-12-14	2017-12-12	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,200	413,178	-0.53	14.56	-32,032	6,015,872
2017-12-01	2017-11-30	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,200	415,378	-0.53	14.40	-31,680	5,981,443
2017-12-01	2017-11-29	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,200	417,578	-0.52	14.09	-30,998	5,883,674
2017-11-17	2017-11-15	4	ATRA	Atara Biotherapeutics, Inc. Restricted Stock Units	M - Exercise		-5,908	3,938	-60.00
2017-11-17	2017-11-15	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	M - Exercise		5,908	743,675	0.80
2017-11-14	2017-11-14	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,200	419,778	-0.52	13.41	-29,502	5,629,223
2017-11-14	2017-11-13	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,200	421,978	-0.52	13.53	-29,766	5,709,362
2017-10-30	2017-10-27	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,200	424,178	-0.52	13.60	-29,920	5,768,821
2017-10-30	2017-10-26	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,200	426,378	-0.51	13.57	-29,854	5,785,949
2017-10-12	2017-10-12	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,200	428,578	-0.51	14.78	-32,516	6,334,383
2017-10-12	2017-10-11	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,200	430,778	-0.51	15.25	-33,550	6,569,364
2017-09-21	2017-09-20	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,200	432,978	-0.51	15.56	-34,232	6,737,138
2017-09-21	2017-09-19	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,200	435,178	-0.50	15.51	-34,122	6,749,611
2017-09-08	2017-09-07	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,200	437,378	-0.50	14.98	-32,956	6,551,922
2017-09-08	2017-09-06	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,200	439,578	-0.50	15.05	-33,110	6,615,649
2017-08-24	2017-08-23	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,200	441,778	-0.50	13.51	-29,722	5,968,421
2017-08-24	2017-08-22	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,200	443,978	-0.49	13.56	-29,832	6,020,342
2017-08-17	2017-08-15	4	ATRA	Atara Biotherapeutics, Inc. Restricted Stock Units	M - Exercise		-5,908	9,846	-37.50
2017-08-17	2017-08-15	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	M - Exercise		5,908	737,767	0.81
2017-08-14	2017-08-11	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,200	446,178	-0.49	14.58	-32,076	6,505,275
2017-08-14	2017-08-10	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,200	448,378	-0.49	14.75	-32,450	6,613,576
2017-07-26	2017-07-25	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-200	450,578	-0.04	16.79	-3,358	7,565,205
2017-07-26	2017-07-25	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,500	450,778	-0.55	15.97	-39,925	7,198,925
2017-07-26	2017-07-24	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-300	453,278	-0.07	17.32	-5,196	7,850,775
2017-07-26	2017-07-24	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,500	453,578	-0.55	16.89	-42,225	7,660,932
2017-05-31	2017-05-31	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,450	456,078	-0.75	13.26	-45,747	6,047,594
2017-05-31	2017-05-30	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,450	459,528	-0.75	13.44	-46,368	6,176,056
2017-05-19	2017-05-18	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,400	462,978	-0.52	14.94	-35,856	6,916,891
2017-05-19	2017-05-17	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,400	465,378	-0.51	14.88	-35,712	6,924,825
2017-05-17	2017-05-15	4	ATRA	Atara Biotherapeutics, Inc. Restricted Stock Units	M - Exercise		-5,908	15,754	-27.27
2017-05-17	2017-05-15	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	M - Exercise		5,908	731,859	0.81
2017-04-26	2017-04-26	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,600	467,778	-0.76	17.78	-64,008	8,317,093
2017-04-26	2017-04-25	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,500	471,378	-0.32	17.70	-26,550	8,343,391
2017-04-26	2017-04-25	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,100	472,878	-0.44	17.07	-35,847	8,072,027
2017-04-12	2017-04-11	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-4,200	474,978	-0.88	16.99	-71,358	8,069,876
2017-04-12	2017-04-10	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,000	479,178	-0.62	17.08	-51,240	8,184,360
2017-03-28	2017-03-28	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-418	482,178	-0.09	19.86	-8,301	9,576,055
2017-03-28	2017-03-28	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,182	482,596	-0.66	18.99	-60,426	9,164,498
2017-03-28	2017-03-27	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-12,400	485,778	-2.49	20.34	-252,216	9,880,725
2017-03-20	2017-03-17	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-17,600	498,178	-3.41	20.01	-352,176	9,968,542
2017-03-20	2017-03-17	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,400	515,778	-0.46	18.50	-44,400	9,541,893
2017-03-20	2017-03-16	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-10,800	518,178	-2.04	18.54	-200,232	9,607,020
2017-02-16	2017-02-16	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,400	348,978	-0.68	15.57	-37,368	5,433,587
2017-02-16	2017-02-15	4	ATRA	Atara Biotherapeutics, Inc. Restricted Stock Units	M - Exercise		-5,907	21,662	-21.43
2017-02-16	2017-02-15	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,400	351,378	-0.68	15.54	-37,296	5,460,414
2017-02-16	2017-02-15	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	M - Exercise		5,907	725,951	0.82
2017-02-08	2017-02-06	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	A - Award		165,000	720,044	29.73
2017-02-06	2017-02-03	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,400	353,778	-0.67	13.87	-33,288	4,906,901
2017-02-06	2017-02-02	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,400	356,178	-0.67	13.45	-32,280	4,790,594
2017-01-19	2017-01-18	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,400	358,578	-0.66	14.47	-34,728	5,188,624
2017-01-19	2017-01-17	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,600	360,978	-0.99	14.08	-50,688	5,082,570
2017-01-09	2017-01-06	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-6,000	364,578	-1.62	17.10	-102,600	6,234,284
2017-01-09	2017-01-05	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,400	370,578	-0.64	16.36	-39,264	6,062,656
2016-12-23	2016-12-23	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,400	372,978	-0.64	15.25	-36,600	5,687,914
2016-12-23	2016-12-22	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-100	375,378	-0.03	15.82	-1,582	5,938,480
2016-12-23	2016-12-22	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,300	375,478	-0.61	15.17	-34,891	5,696,001
2016-12-08	2016-12-07	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,600	377,778	-0.94	17.30	-62,280	6,535,559
2016-12-08	2016-12-06	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,600	381,378	-0.94	18.55	-66,780	7,074,562
2016-11-23	2016-11-23	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,100	384,978	-0.28	19.22	-21,142	7,399,277
2016-11-23	2016-11-23	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,500	386,078	-0.64	18.40	-46,000	7,103,835
2016-11-23	2016-11-22	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-8,400	388,578	-2.12	18.21	-152,964	7,076,005
2016-11-17	2016-11-15	4	ATRA	Atara Biotherapeutics, Inc. Restricted Stock Units	M - Exercise		-5,908	27,569	-17.65
2016-11-17	2016-11-15	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	M - Exercise		5,908	555,044	1.08
2016-10-28	2016-10-27	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,400	396,978	-0.60	13.70	-32,880	5,438,599
2016-10-28	2016-10-26	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,400	399,378	-0.60	13.91	-33,384	5,555,348
2016-10-17	2016-10-14	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,400	401,778	-0.59	16.01	-38,424	6,432,466
2016-10-17	2016-10-13	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,400	404,178	-0.59	15.91	-38,184	6,430,472
2016-09-29	2016-09-28	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-300	406,578	-0.07	21.82	-6,546	8,871,532
2016-09-29	2016-09-28	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-4,500	406,878	-1.09	21.40	-96,300	8,707,189
2016-09-29	2016-09-27	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-7,200	411,378	-1.72	20.50	-147,600	8,433,249
2016-09-23	2016-09-22	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	A - Award		320,000	549,136	139.66
2016-09-19	2016-09-16	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,600	418,578	-0.85	19.32	-69,552	8,086,927
2016-09-19	2016-09-15	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,600	422,178	-0.85	19.39	-69,804	8,186,031
2016-08-23	2016-08-23	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-4,800	425,778	-1.11	22.08	-105,984	9,401,178
2016-08-23	2016-08-22	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-4,800	430,578	-1.10	22.58	-108,384	9,722,451
2016-08-17	2016-08-15	4	ATRA	Atara Biotherapeutics, Inc. Restricted Stock Units	M - Exercise		-5,908	33,477	-15.00
2016-08-17	2016-08-15	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	M - Exercise		5,908	229,136	2.65
2016-08-17	2016-07-13	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	G - Gift		-330,957	0	-100.00
2016-07-21	2016-07-21	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-4,800	315,511	-1.50	22.22	-106,656	7,010,654
2016-07-21	2016-07-20	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-4,800	320,311	-1.48	21.99	-105,552	7,043,639
2016-07-11	2016-07-08	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-4,800	325,111	-1.45	22.96	-110,208	7,464,549
2016-07-11	2016-07-07	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-4,800	329,911	-1.43	22.80	-109,440	7,521,971
2016-06-27	2016-06-24	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-4,800	334,711	-1.41	21.32	-102,336	7,136,039
2016-06-27	2016-06-23	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-4,800	339,511	-1.39	21.19	-101,712	7,194,238
2016-06-08	2016-06-08	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-4,800	344,311	-1.37	20.79	-99,792	7,158,226
2016-06-08	2016-06-07	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,200	349,111	-0.34	20.90	-25,080	7,296,420
2016-06-08	2016-06-07	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-6,000	350,311	-1.68	20.25	-121,500	7,093,798
2016-05-27	2016-05-26	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,600	356,311	-1.00	17.35	-62,460	6,181,996
2016-05-27	2016-05-25	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-3,600	359,911	-0.99	18.03	-64,908	6,489,195
2016-05-18	2016-05-16	4	ATRA	Atara Biotherapeutics, Inc. Restricted Stock Units	M - Exercise		-5,907	39,385	-13.04
2016-05-18	2016-05-16	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	M - Exercise		5,907	223,228	2.72
2016-04-26	2016-04-26	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-100	363,511	-0.03	20.15	-2,015	7,324,747
2016-04-26	2016-04-25	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,200	363,611	-0.33	20.12	-24,144	7,315,853
2016-04-13	2016-04-12	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,200	364,811	-0.33	20.20	-24,240	7,369,182
2016-04-13	2016-04-11	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-12,010	366,011	-3.18	20.42	-245,244	7,473,945
2016-04-04	2016-04-01	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-890	378,021	-0.23	20.04	-17,836	7,575,541
2016-04-04	2016-03-31	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-300	378,911	-0.08	20.01	-6,003	7,582,009
2016-02-18	2016-02-16	4	ATRA	Atara Biotherapeutics, Inc. Restricted Stock Units	M - Exercise		-5,908	45,292	-11.54
2016-02-18	2016-02-16	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	M - Exercise		5,908	217,321	2.79
2016-02-11	2016-02-09	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	A - Award		163,973	211,413	345.64
2016-01-15	2016-01-14	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,200	379,211	-0.32	20.07	-24,084	7,610,765
2016-01-15	2016-01-13	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,200	380,411	-0.31	20.32	-24,384	7,729,952
2016-01-04	2015-12-31	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-800	381,611	-0.21	27.17	-21,736	10,368,371
2016-01-04	2015-12-31	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-400	382,411	-0.10	26.00	-10,400	9,942,686
2016-01-04	2015-12-30	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,200	382,811	-0.31	25.21	-30,252	9,650,665
2015-12-21	2015-12-17	4	ATRA	Atara Biotherapeutics, Inc. Employee Stock Option (Right to Buy)	A - Award		220,000	220,000
2015-12-16	2015-12-15	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-200	384,011	-0.05	22.21	-4,442	8,528,884
2015-12-16	2015-12-15	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-700	384,211	-0.18	21.55	-15,085	8,279,747
2015-12-16	2015-12-15	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-300	384,911	-0.08	20.69	-6,207	7,963,809
2015-12-16	2015-12-14	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-100	385,211	-0.03	25.84	-2,584	9,953,852
2015-12-16	2015-12-14	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-400	385,311	-0.10	24.93	-9,972	9,605,803
2015-12-16	2015-12-14	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-300	385,711	-0.08	23.34	-7,002	9,002,495
2015-12-16	2015-12-14	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-400	386,011	-0.10	21.54	-8,616	8,314,677
2015-12-07	2015-12-04	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,200	386,411	-0.31	37.93	-45,516	14,656,569
2015-12-07	2015-12-04	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-800	387,611	-0.21	36.99	-29,592	14,337,731
2015-12-07	2015-12-03	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-600	388,411	-0.15	38.54	-23,124	14,969,360
2015-12-07	2015-12-03	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-700	389,011	-0.18	37.43	-26,201	14,560,682
2015-12-07	2015-12-03	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-700	389,711	-0.18	36.21	-25,347	14,111,435
2015-11-25	2015-11-24	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-200	390,411	-0.05	36.71	-7,342	14,331,988
2015-11-25	2015-11-24	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-900	390,611	-0.23	35.80	-32,220	13,983,874
2015-11-25	2015-11-24	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-900	391,511	-0.23	34.81	-31,329	13,628,498
2015-11-25	2015-11-23	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,800	392,411	-0.71	34.74	-97,272	13,632,358
2015-11-18	2015-11-16	4	ATRA	Atara Biotherapeutics, Inc. Restricted Stock Units	M - Exercise		-5,908	51,200	-10.35
2015-11-18	2015-11-16	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	M - Exercise		5,908	47,440	14.23
2015-10-23	2015-10-22	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-200	395,211	-0.05	25.36	-5,072	10,022,551
2015-10-23	2015-10-22	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,000	395,411	-0.25	24.36	-24,360	9,632,212
2015-10-23	2015-10-21	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-600	396,411	-0.15	28.11	-16,866	11,143,113
2015-10-23	2015-10-21	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-300	397,011	-0.08	27.67	-8,301	10,985,294
2015-10-23	2015-10-21	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,100	397,311	-0.28	25.57	-28,127	10,159,242
2015-10-08	2015-10-07	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-200	398,411	-0.05	36.00	-7,200	14,342,796
2015-10-08	2015-10-07	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,100	398,611	-0.28	35.26	-38,786	14,055,024
2015-10-08	2015-10-07	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-700	399,711	-0.17	33.71	-23,597	13,474,258
2015-10-08	2015-10-06	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-500	400,411	-0.12	32.49	-16,245	13,009,353
2015-10-08	2015-10-06	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-800	400,911	-0.20	31.64	-25,312	12,684,824
2015-10-08	2015-10-06	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-700	401,711	-0.17	30.28	-21,196	12,163,809
2015-09-25	2015-09-24	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,500	402,411	-0.37	43.06	-64,590	17,327,818
2015-09-25	2015-09-24	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,100	403,911	-0.27	42.17	-46,387	17,032,927
2015-09-25	2015-09-23	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,600	405,011	-0.64	43.29	-112,554	17,532,926
2015-09-14	2015-09-11	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-100	407,611	-0.02	47.74	-4,774	19,459,349
2015-09-14	2015-09-11	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,700	407,711	-0.42	46.83	-79,611	19,093,106
2015-09-14	2015-09-11	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-800	409,411	-0.20	45.42	-36,336	18,595,448
2015-09-14	2015-09-10	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-400	410,211	-0.10	46.73	-18,692	19,169,160
2015-09-14	2015-09-10	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,800	410,611	-0.44	45.98	-82,764	18,879,894
2015-09-14	2015-09-10	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-400	412,411	-0.10	44.67	-17,868	18,422,399
2015-08-31	2015-08-28	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,100	374,982	-0.29	40.07	-44,077	15,025,529
2015-08-31	2015-08-28	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,500	376,082	-0.40	39.20	-58,800	14,742,414
2015-08-31	2015-08-27	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-600	377,582	-0.16	40.44	-24,264	15,269,416
2015-08-31	2015-08-27	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-500	378,182	-0.13	39.44	-19,720	14,915,498
2015-08-31	2015-08-27	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,500	378,682	-0.39	38.15	-57,225	14,446,718
2015-08-19	2015-08-17	4	ATRA	Atara Biotherapeutics, Inc. Restricted Stock Units	M - Exercise		-5,907	57,108	-9.37
2015-08-19	2015-08-17	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	M - Exercise		5,907	41,532	16.58
2015-08-03	2015-07-31	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-600	380,182	-0.16	57.45	-34,470	21,841,456
2015-08-03	2015-07-31	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,100	380,782	-0.29	56.25	-61,875	21,418,988
2015-08-03	2015-07-31	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-900	381,882	-0.24	55.41	-49,869	21,160,082
2015-08-03	2015-07-30	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-200	382,782	-0.05	57.13	-11,426	21,868,336
2015-08-03	2015-07-30	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,400	382,982	-0.62	56.05	-134,520	21,466,141
2015-07-20	2015-07-17	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-800	385,382	-0.21	60.71	-48,568	23,396,541
2015-07-20	2015-07-17	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,800	386,182	-0.46	59.90	-107,820	23,132,302
2015-07-20	2015-07-16	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-200	387,982	-0.05	62.90	-12,580	24,404,068
2015-07-20	2015-07-16	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-690	388,182	-0.18	61.70	-42,573	23,950,829
2015-07-20	2015-07-16	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,710	388,872	-0.44	60.90	-104,139	23,682,305
2015-07-02	2015-07-01	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-100	390,582	-0.03	50.65	-5,065	19,782,978
2015-07-02	2015-07-01	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-900	390,682	-0.23	49.86	-44,874	19,479,405
2015-07-02	2015-07-01	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-700	391,582	-0.18	48.40	-33,880	18,952,569
2015-07-02	2015-07-01	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-900	392,282	-0.23	45.25	-40,725	17,750,760
2015-07-02	2015-06-30	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-500	393,182	-0.13	53.61	-26,805	21,078,487
2015-07-02	2015-06-30	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,700	393,682	-0.43	53.03	-90,151	20,876,956
2015-07-02	2015-06-30	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-400	395,382	-0.10	51.65	-20,660	20,421,480
2015-06-19	2015-06-18	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-300	395,782	-0.08	57.15	-17,145	22,618,941
2015-06-19	2015-06-18	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-700	396,082	-0.18	55.77	-39,039	22,089,493
2015-06-19	2015-06-18	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-900	396,782	-0.23	53.83	-48,447	21,358,775
2015-06-19	2015-06-18	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-700	397,682	-0.18	52.62	-36,834	20,926,027
2015-06-19	2015-06-17	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-600	398,382	-0.15	55.60	-33,360	22,150,039
2015-06-19	2015-06-17	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,000	398,982	-0.50	54.86	-109,720	21,888,153
2015-06-08	2015-06-05	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-100	400,982	-0.02	45.25	-4,525	18,144,436
2015-06-08	2015-06-05	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-900	401,082	-0.22	44.64	-40,176	17,904,300
2015-06-08	2015-06-05	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,600	401,982	-0.40	43.74	-69,984	17,582,693
2015-06-08	2015-06-04	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-500	403,582	-0.12	43.15	-21,575	17,414,563
2015-06-08	2015-06-04	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,500	404,082	-0.37	42.76	-64,140	17,278,546
2015-06-08	2015-06-04	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,800	405,582	-0.44	41.22	-74,196	16,718,090
2015-05-26	2015-05-22	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-600	407,382	-0.15	38.16	-22,896	15,545,697
2015-05-26	2015-05-22	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,400	407,982	-0.34	37.40	-52,360	15,258,527
2015-05-26	2015-05-21	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-600	409,382	-0.15	38.47	-23,082	15,748,926
2015-05-26	2015-05-21	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-1,400	409,982	-0.34	37.06	-51,884	15,193,933
2015-05-26	2015-05-15	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	G - Gift		19,082	411,382	4.86
2015-05-26	2015-05-15	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	G - Gift		-19,082	35,625	-34.88
2015-05-19	2015-05-15	4	ATRA	Atara Biotherapeutics, Inc. Restricted Stock Units	M - Exercise		-31,508	63,015	-33.33
2015-05-19	2015-05-15	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	F - Taxes		-14,801	54,707	-21.29	37.30	-552,077	2,040,571
2015-05-19	2015-05-15	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	M - Exercise		31,508	69,508	82.92
2015-04-24	2015-04-23	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,600	392,300	-0.66	62.70	-163,020	24,597,210
2015-04-24	2015-04-22	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	S - Sale	X	-2,600	394,900	-0.65	60.01	-156,026	23,697,949
2015-01-21	2015-01-16	4	ATRA	Atara Biotherapeutics, Inc. Employee Stock Option (Right to Buy)	A - Award		126,667	126,667
2015-01-21	2015-01-16	4	ATRA	Atara Biotherapeutics, Inc. Common Stock	A - Award		38,000	38,000
2014-10-23	2014-10-21	4	ATRA	Atara Biotherapeutics, Inc. Restricted Stock Unit	A - Award		94,523	94,523
2014-10-16	2014-10-15	4	ATRA	Atara Biotherapeutics, Inc. Employee Stock Option (Right to Buy)	M - Exercise		155,000	155,000
2014-10-15		3	ATRA	Atara Biotherapeutics, Inc. Common Stock				2,132,306
2014-10-15		3	ATRA	Atara Biotherapeutics, Inc. Common Stock				2,132,306

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