Insider Trading activities of Atara Biotherapeutics, Inc. insiders.

Monthly summaries of insider trading activities (stock purchases, sales, and option exercises) reported by insiders of Atara Biotherapeutics, Inc. since 2005 are illustrated in Table 1 and Table 2. Table 1 shows the monthly insider trading data of Atara Biotherapeutics, Inc. since year 2005. Table 2 shows the detailed insider transactions of Atara Biotherapeutics, Inc. since 2005. The reporting company's ticker symbol is ATRA. The reporting company's CIK number is 1604464.
The total value of stock buying since 2005 is $5,106,692.
The total value of stock sales since 2005 is $46,924,548.
The total value of stock option exercises since 2005 is $2,759,736.


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Table 1. Monthly summaries of insider stock purchases, sales, and option exercises for Atara Biotherapeutics, Inc. (ATRA).
Trading Period Insider Buying Insider Sales Option Exercises
year-month Shares Value Shares Value Shares Value
2018-10 0 $0 9,300 $378,125 1,500 $30,599
2018-09 0 $0 62,100 $2,531,733 1,500 $30,599
2018-08 0 $0 17,875 $663,179 1,500 $30,599
2018-07 2,000 $73,600 76,200 $3,007,846 10,000 $204,000
2018-06 0 $0 17,700 $796,161 0 $0
2018-05 0 $0 104,319 $4,824,581 47,221 $508,576
2018-04 0 $0 8,800 $370,611 0 $0
2018-03 0 $0 165,530 $6,522,958 72,754 $1,427,651
2018-02 0 $0 92,997 $4,141,152 23,566 $0
2018-01 0 $0 134,100 $3,838,610 30,000 $330,000
2017-12 0 $0 58,600 $1,121,508 0 $0
2017-11 0 $0 21,878 $311,905 29,760 $0
2017-10 0 $0 14,800 $211,940 0 $0
2017-09 0 $0 14,800 $226,220 0 $0
2017-08 0 $0 34,273 $497,363 29,759 $0
2017-07 0 $0 11,500 $181,640 0 $0
2017-06 0 $0 7,000 $89,050 0 $0
2017-05 0 $0 41,035 $607,323 37,106 $0
2017-04 0 $0 20,400 $352,871 0 $0
2017-03 0 $0 93,300 $1,844,123 0 $0
2017-02 0 $0 77,183 $1,191,897 42,178 $0
2017-01 0 $0 20,400 $312,900 0 $0
2016-12 0 $0 18,000 $295,248 0 $0
2016-11 0 $0 48,049 $921,085 42,181 $0
2016-10 0 $0 14,600 $230,197 0 $0
2016-09 0 $0 19,200 $390,684 0 $0
2016-08 0 $0 16,302 $360,364 42,179 $0
2016-07 0 $0 19,200 $431,855 0 $0
2016-06 0 $0 21,600 $451,980 0 $0
2016-05 0 $0 24,964 $405,592 42,181 $0
2016-04 0 $0 15,400 $313,477 0 $0
2016-03 3,000 $41,565 300 $6,003 0 $0
2016-02 0 $0 20,255 $320,271 42,178 $0
2016-01 0 $0 2,400 $48,468 0 $0
2015-12 2,500 $55,000 8,800 $266,334 0 $0
2015-11 0 $0 23,723 $815,304 39,777 $0
2015-10 0 $0 7,200 $216,986 0 $0
2015-09 0 $0 10,400 $463,737 0 $0
2015-08 0 $0 71,383 $3,280,083 105,275 $197,712
2015-07 0 $0 20,500 $1,162,808 0 $0
2015-06 0 $0 34,200 $1,650,240 0 $0
2015-05 0 $0 14,000 $551,090 242,254 $0
2015-04 0 $0 5,200 $319,046 0 $0
2015-03 4,000 $118,285 0 $0 0 $0
2015-02 11,000 $198,000 0 $0 0 $0
2014-10 420,022 $4,620,242 0 $0 0 $0

Table 2. Detailed insider stock purchases, sales, and option exercises of Atara Biotherapeutics, Inc. insiders (ATRA)
  Trade Date   Insider Name Trade Type     Shares       Price ($)   Value ($)
2018-10-05 Ciechanover Isaac E. (Chief Executive Officer) Sale 3,900 40.28 157,080
2018-10-04 Ciechanover Isaac E. (Chief Executive Officer) Sale 3,900 40.72 158,788
2018-10-01 Newell Joe (Chief Tech. Operations Officer) Sale 1,500 41.51 62,257
2018-10-01 Newell Joe (Chief Tech. Operations Officer) Option Ex 1,500 20.40 30,599
2018-09-26 Haqq Christopher (EVP, R&D & Chief Scientific Of) Sale 13,500 43.08 581,580
2018-09-25 Haqq Christopher (EVP, R&D & Chief Scientific Of) Sale 13,500 40.74 550,057
2018-09-24 Haqq Christopher (EVP, R&D & Chief Scientific Of) Sale 18,000 40.13 722,430
2018-09-19 Ciechanover Isaac E. (Chief Executive Officer) Sale 3,900 39.99 155,961
2018-09-18 Ciechanover Isaac E. (Chief Executive Officer) Sale 3,900 39.62 154,518
2018-09-07 Ciechanover Isaac E. (Chief Executive Officer) Sale 3,900 39.98 155,941
2018-09-06 Ciechanover Isaac E. (Chief Executive Officer) Sale 3,900 38.94 151,846
2018-09-04 Newell Joe (Chief Tech. Operations Officer) Sale 1,500 39.60 59,400
2018-09-04 Newell Joe (Chief Tech. Operations Officer) Option Ex 1,500 20.40 30,599
2018-08-21 Ciechanover Isaac E. (Chief Executive Officer) Sale 3,900 36.69 143,091
2018-08-20 Ciechanover Isaac E. (Chief Executive Officer) Sale 3,900 36.04 140,556
2018-08-15 Haqq Christopher (EVP, R&D & Chief Scientific Of) Sale 775 37.54 29,093
2018-08-07 Ciechanover Isaac E. (Chief Executive Officer) Sale 3,900 37.55 146,445
2018-08-06 Ciechanover Isaac E. (Chief Executive Officer) Sale 3,900 37.48 146,172
2018-08-01 Newell Joe (Chief Tech. Operations Officer) Sale 1,500 38.55 57,822
2018-08-01 Newell Joe (Chief Tech. Operations Officer) Option Ex 1,500 20.40 30,599
2018-07-30 Newell Joe (Chief Tech. Operations Officer) Sale 10,000 36.01 360,050
2018-07-30 Newell Joe (Chief Tech. Operations Officer) Option Ex 10,000 20.40 204,000
2018-07-27 Koppikar Utpal (Chief Financial Officer) Buy 2,000 36.80 73,600
2018-07-27 Ciechanover Isaac E. (Chief Executive Officer) Sale 3,900 37.04 144,456
2018-07-26 Ciechanover Isaac E. (Chief Executive Officer) Sale 3,900 39.23 153,016
2018-07-10 Ciechanover Isaac E. (Chief Executive Officer) Sale 28,400 40.23 1,142,674
2018-07-09 Ciechanover Isaac E. (Chief Executive Officer) Sale 30,000 40.26 1,207,650
2018-06-27 Ciechanover Isaac E. (Chief Executive Officer) Sale 2,000 38.48 76,970
2018-06-26 Ciechanover Isaac E. (Chief Executive Officer) Sale 4,400 40.40 177,760
2018-06-18 Gallagher Carol Giltner (Director) Sale 2,500 44.98 112,462
2018-06-06 Ciechanover Isaac E. (Chief Executive Officer) Sale 4,400 47.60 209,453
2018-06-05 Ciechanover Isaac E. (Chief Executive Officer) Sale 4,400 49.89 219,516
2018-05-22 Ciechanover Isaac E. (Chief Executive Officer) Sale 4,400 50.88 223,872
2018-05-21 Ciechanover Isaac E. (Chief Executive Officer) Sale 4,400 52.71 231,937
2018-05-18 Clark Mitchall G. (EVP & Chief R & QA Officer) Sale 25,860 50.03 1,293,775
2018-05-16 Clark Mitchall G. (EVP & Chief R & QA Officer) Sale 4,647 46.17 214,551
2018-05-16 Gallagher Carol Giltner (Director) Sale 273 46.06 12,574
2018-05-15 Porter Derrell (SVP, Head of Global Commercial) Sale 16,334 45.02 735,356
2018-05-15 Porter Derrell (SVP, Head of Global Commercial) Option Ex 16,334 14.30 233,576
2018-05-15 Haqq Christopher (EVP, R&D & Chief Scientific Of) Sale 25,775 45.22 1,165,622
2018-05-15 Haqq Christopher (EVP, R&D & Chief Scientific Of) Option Ex 25,000 11.00 275,000
2018-05-15 Clark Mitchall G. (EVP & Chief R & QA Officer) Option Ex 4,808 .00 0
2018-05-15 Fust Matthew K (Director) Option Ex 534 .00 0
2018-05-15 Gallagher Carol Giltner (Director) Option Ex 545 .00 0
2018-05-14 Fust Matthew K (Director) Sale 12,286 43.57 535,301
2018-05-10 Ciechanover Isaac E. (Chief Executive Officer) Sale 4,400 40.53 178,332
2018-05-09 Ciechanover Isaac E. (Chief Executive Officer) Sale 4,400 38.92 171,270
2018-05-08 Porter Derrell (SVP, Head of Global Commercial) Sale 1,544 40.15 61,991
2018-04-12 Ciechanover Isaac E. (Chief Executive Officer) Sale 4,400 43.16 189,903
2018-04-11 Ciechanover Isaac E. (Chief Executive Officer) Sale 4,400 41.07 180,708
2018-03-29 Clark Mitchall G. (EVP & Chief R & QA Officer) Sale 22,400 40.07 897,568
2018-03-27 Ciechanover Isaac E. (Chief Executive Officer) Sale 4,400 37.57 165,308
2018-03-27 Clark Mitchall G. (EVP & Chief R & QA Officer) Sale 100,203 38.80 3,887,675
2018-03-27 Clark Mitchall G. (EVP & Chief R & QA Officer) Option Ex 72,754 19.62 1,427,651
2018-03-26 Ciechanover Isaac E. (Chief Executive Officer) Sale 4,400 40.42 177,848
2018-03-26 Haqq Christopher (EVP, R&D & Chief Scientific Of) Sale 18,327 40.02 733,538
2018-03-20 Mcgrath John (EVP & Chief Financial Officer) Sale 3,000 38.83 116,490
2018-03-19 Mcgrath John (EVP & Chief Financial Officer) Sale 3,000 41.99 125,970
2018-03-16 Ciechanover Isaac E. (Chief Executive Officer) Sale 4,400 42.17 185,548
2018-03-15 Ciechanover Isaac E. (Chief Executive Officer) Sale 4,400 42.41 186,603
2018-03-12 Ciechanover Isaac E. (Chief Executive Officer) Sale 1,000 46.41 46,410
2018-02-22 Ciechanover Isaac E. (Chief Executive Officer) Sale 4,600 43.92 202,045
2018-02-21 Ciechanover Isaac E. (Chief Executive Officer) Sale 4,500 44.08 198,337
2018-02-20 Ciechanover Isaac E. (Chief Executive Officer) Sale 8,700 45.28 393,936
2018-02-16 Ciechanover Isaac E. (Chief Executive Officer) Sale 10,000 47.08 470,820
2018-02-16 Gallagher Carol Giltner (Director) Sale 1,183 46.50 55,009
2018-02-16 Mcgrath John (EVP & Chief Financial Officer) Sale 6,500 47.51 308,782
2018-02-15 Ciechanover Isaac E. (Chief Executive Officer) Sale 10,000 47.02 470,250
2018-02-15 Ciechanover Isaac E. (Chief Executive Officer) Option Ex 3,938 .00 0
2018-02-15 Haqq Christopher (EVP, R&D & Chief Scientific Of) Option Ex 553 .00 0
2018-02-15 Clark Mitchall G. (EVP & Chief R & QA Officer) Option Ex 7,211 .00 0
2018-02-15 Soffer Gad (EVP & Chief Strategy Officer) Option Ex 2,764 .00 0
2018-02-15 Fust Matthew K (Director) Option Ex 1,603 .00 0
2018-02-15 Gallagher Carol Giltner (Director) Option Ex 2,365 .00 0
2018-02-15 Mcgrath John (EVP & Chief Financial Officer) Sale 6,500 46.77 304,005
2018-02-15 Mcgrath John (EVP & Chief Financial Officer) Option Ex 5,132 .00 0
2018-02-14 Ciechanover Isaac E. (Chief Executive Officer) Sale 10,000 47.41 474,150
2018-02-13 Ciechanover Isaac E. (Chief Executive Officer) Sale 10,000 45.10 451,000
2018-02-09 Ciechanover Isaac E. (Chief Executive Officer) Sale 4,400 39.04 171,767
2018-02-09 Turner Heather D (Former EVP, GC & Sec.) Sale 12,214 39.10 477,591
2018-02-08 Ciechanover Isaac E. (Chief Executive Officer) Sale 4,400 37.15 163,460
2018-01-26 Ciechanover Isaac E. (Chief Executive Officer) Sale 9,300 36.33 337,841
2018-01-25 Ciechanover Isaac E. (Chief Executive Officer) Sale 10,000 34.04 340,430
2018-01-24 Ciechanover Isaac E. (Chief Executive Officer) Sale 14,400 34.20 492,436
2018-01-23 Ciechanover Isaac E. (Chief Executive Officer) Sale 24,100 35.22 848,729
2018-01-22 Ciechanover Isaac E. (Chief Executive Officer) Sale 10,000 32.55 325,550
2018-01-16 Ciechanover Isaac E. (Chief Executive Officer) Sale 600 30.38 18,228
2018-01-12 Ciechanover Isaac E. (Chief Executive Officer) Sale 100 30.05 3,005
2018-01-12 Mcgrath John (EVP & Chief Financial Officer) Sale 33,500 23.66 792,610
2018-01-12 Mcgrath John (EVP & Chief Financial Officer) Option Ex 30,000 11.00 330,000
2018-01-11 Ciechanover Isaac E. (Chief Executive Officer) Sale 20,000 21.75 435,000
2018-01-11 Mcgrath John (EVP & Chief Financial Officer) Sale 3,500 20.77 72,695
2018-01-10 Ciechanover Isaac E. (Chief Executive Officer) Sale 8,600 20.01 172,086
2017-12-29 Ciechanover Isaac E. (Chief Executive Officer) Sale 20,000 19.19 383,740
2017-12-29 Mcgrath John (EVP & Chief Financial Officer) Sale 32,000 20.00 640,000
2017-12-28 Ciechanover Isaac E. (Chief Executive Officer) Sale 2,200 15.15 33,330
2017-12-13 Ciechanover Isaac E. (Chief Executive Officer) Sale 2,200 14.73 32,406
2017-12-12 Ciechanover Isaac E. (Chief Executive Officer) Sale 2,200 14.56 32,032
2017-11-30 Ciechanover Isaac E. (Chief Executive Officer) Sale 2,200 14.40 31,680
2017-11-29 Ciechanover Isaac E. (Chief Executive Officer) Sale 2,200 14.09 30,998
2017-11-17 Soffer Gad (EVP & Chief Strategy Officer) Sale 7,000 15.00 105,000
2017-11-16 Clark Mitchall G. (EVP & Chief R & QA Officer) Sale 3,290 14.20 46,718
2017-11-16 Gallagher Carol Giltner (Director) Sale 1,184 14.20 16,812
2017-11-15 Ciechanover Isaac E. (Chief Executive Officer) Option Ex 5,908 .00 0
2017-11-15 Haqq Christopher (EVP, R&D & Chief Scientific Of) Sale 1,604 13.36 21,429
2017-11-15 Haqq Christopher (EVP, R&D & Chief Scientific Of) Option Ex 829 .00 0
2017-11-15 Clark Mitchall G. (EVP & Chief R & QA Officer) Option Ex 7,212 .00 0
2017-11-15 Soffer Gad (EVP & Chief Strategy Officer) Option Ex 4,146 .00 0
2017-11-15 Fust Matthew K (Director) Option Ex 1,602 .00 0
2017-11-15 Gallagher Carol Giltner (Director) Option Ex 2,366 .00 0
2017-11-15 Mcgrath John (EVP & Chief Financial Officer) Option Ex 7,697 .00 0
2017-11-14 Ciechanover Isaac E. (Chief Executive Officer) Sale 2,200 13.41 29,502
2017-11-13 Ciechanover Isaac E. (Chief Executive Officer) Sale 2,200 13.53 29,766
2017-10-27 Ciechanover Isaac E. (Chief Executive Officer) Sale 2,200 13.60 29,920
2017-10-26 Ciechanover Isaac E. (Chief Executive Officer) Sale 2,200 13.57 29,854
2017-10-16 Haqq Christopher (EVP, R&D & Chief Scientific Of) Sale 6,000 14.35 86,100
2017-10-12 Ciechanover Isaac E. (Chief Executive Officer) Sale 2,200 14.78 32,516
2017-10-11 Ciechanover Isaac E. (Chief Executive Officer) Sale 2,200 15.25 33,550
2017-09-20 Ciechanover Isaac E. (Chief Executive Officer) Sale 2,200 15.56 34,232
2017-09-19 Ciechanover Isaac E. (Chief Executive Officer) Sale 2,200 15.51 34,122
2017-09-15 Haqq Christopher (EVP, R&D & Chief Scientific Of) Sale 6,000 15.30 91,800
2017-09-07 Ciechanover Isaac E. (Chief Executive Officer) Sale 2,200 14.98 32,956
2017-09-06 Ciechanover Isaac E. (Chief Executive Officer) Sale 2,200 15.05 33,110
2017-08-23 Ciechanover Isaac E. (Chief Executive Officer) Sale 2,200 13.51 29,722
2017-08-22 Ciechanover Isaac E. (Chief Executive Officer) Sale 2,200 13.56 29,832
2017-08-16 Clark Mitchall G. (EVP & Chief R & QA Officer) Sale 3,021 14.33 43,290
2017-08-16 Soffer Gad (EVP & Chief Strategy Officer) Sale 2,464 14.53 35,801
2017-08-16 Gallagher Carol Giltner (Director) Sale 1,184 14.30 16,931
2017-08-16 Mcgrath John (EVP & Chief Financial Officer) Sale 2,100 14.39 30,219
2017-08-15 Ciechanover Isaac E. (Chief Executive Officer) Option Ex 5,908 .00 0
2017-08-15 Haqq Christopher (EVP, R&D & Chief Scientific Of) Sale 7,604 14.75 112,159
2017-08-15 Haqq Christopher (EVP, R&D & Chief Scientific Of) Option Ex 829 .00 0
2017-08-15 Clark Mitchall G. (EVP & Chief R & QA Officer) Option Ex 7,211 .00 0
2017-08-15 Soffer Gad (EVP & Chief Strategy Officer) Sale 7,000 15.00 105,000
2017-08-15 Soffer Gad (EVP & Chief Strategy Officer) Option Ex 4,145 .00 0
2017-08-15 Fust Matthew K (Director) Option Ex 1,603 .00 0
2017-08-15 Gallagher Carol Giltner (Director) Option Ex 2,366 .00 0
2017-08-15 Mcgrath John (EVP & Chief Financial Officer) Sale 2,100 14.23 29,883
2017-08-15 Mcgrath John (EVP & Chief Financial Officer) Option Ex 7,697 .00 0
2017-08-11 Ciechanover Isaac E. (Chief Executive Officer) Sale 2,200 14.58 32,076
2017-08-10 Ciechanover Isaac E. (Chief Executive Officer) Sale 2,200 14.75 32,450
2017-07-25 Ciechanover Isaac E. (Chief Executive Officer) Sale 2,700 16.38 44,226
2017-07-24 Ciechanover Isaac E. (Chief Executive Officer) Sale 2,800 17.11 47,894
2017-07-17 Haqq Christopher (EVP, R&D & Chief Scientific Of) Sale 6,000 14.92 89,520
2017-06-15 Haqq Christopher (EVP, R&D & Chief Scientific Of) Sale 6,000 12.65 75,900
2017-06-09 Gallagher Carol Giltner (Director) Sale 1,000 13.15 13,150
2017-05-31 Ciechanover Isaac E. (Chief Executive Officer) Sale 3,450 13.26 45,747
2017-05-30 Ciechanover Isaac E. (Chief Executive Officer) Sale 3,450 13.44 46,368
2017-05-18 Ciechanover Isaac E. (Chief Executive Officer) Sale 2,400 14.94 35,856
2017-05-17 Ciechanover Isaac E. (Chief Executive Officer) Sale 2,400 14.88 35,712
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Insider trading activities including stock purchases, stock sales, and option exercises of ATRA listed in the above tables cannot be completely guaranteed as to their accuracy. For more insider trading information of Atara Biotherapeutics, Inc. (symbol ATRA, CIK number 1604464) see the Securities and Exchange Commission (SEC) website.