Insider · CIK 0001205442

John McGrath

Period1M 3M 6M 1Y 2Y All datashares as filed — not split-adjusted

Open-market buys & salesbuys $0 · 0sales $5.2M · 17net −$5.2M

Reported trades — common stock

Trade	Reported (ET)	Company	Shares	Avg price	Total	Owned after	Δ stake	Flags
Mar 19, 2018 SForm 4 →	Mar 20, 6:30 pm EDT	Atara Biotherapeutics, Inc.ATRA	6,000	$40.41	$242,460	88,762	−6.33%	plan?
Feb 15, 2018 FMForm 4 →	Feb 20, 8:22 pm EST	Atara Biotherapeutics, Inc.ATRA	8,058	$47.05	$137,668	101,262	—	plan?
Feb 15, 2018 SForm 4 →	Feb 20, 8:22 pm EST	Atara Biotherapeutics, Inc.ATRA	13,000	$47.07	$611,925	94,762	−12.1%	plan?
Feb 9, 2018 FForm 4 →	Feb 12, 8:54 pm EST	Atara Biotherapeutics, Inc.ATRA	4,819	$41.70	$200,952	105,556	—	plan?
Feb 6, 2018 AFForm 4 →	Feb 8, 5:43 pm EST	Atara Biotherapeutics, Inc.ATRA	29,279	$35.80	$153,188	110,375	—	plan?
Jan 12, 2018 MForm 4 →	Jan 12, 7:56 pm EST	Atara Biotherapeutics, Inc.ATRA	30,000	$11.00	$330,000	123,154	—	plan?
Jan 11, 2018 SForm 4 →	Jan 12, 7:56 pm EST	Atara Biotherapeutics, Inc.ATRA	37,000	$24.35	$900,815	89,654	−29.2%	plan?
Dec 29, 2017 SForm 4 →	Jan 2, 2018, 7:14 pm EST	Atara Biotherapeutics, Inc.ATRA	32,000	$20.00	$640,000	96,654	−24.9%	plan?
Nov 15, 2017 MForm 4 →	Nov 17, 6:24 pm EST	Atara Biotherapeutics, Inc.ATRA	7,697	—	—	128,654	—	plan?
Aug 15, 2017 SForm 4 →	Aug 17, 5:36 pm EDT	Atara Biotherapeutics, Inc.ATRA	4,200	$14.31	$60,102	120,957	−3.36%	plan?
Aug 15, 2017 MForm 4 →	Aug 17, 5:36 pm EDT	Atara Biotherapeutics, Inc.ATRA	7,697	—	—	125,157	—	plan?
May 15, 2017 SForm 4 →	May 17, 5:01 pm EDT	Atara Biotherapeutics, Inc.ATRA	4,000	$15.11	$60,440	117,460	−3.29%	plan?
May 15, 2017 MForm 4 →	May 17, 5:01 pm EDT	Atara Biotherapeutics, Inc.ATRA	8,633	—	—	121,460	—	plan?
Mar 22, 2017 SForm 4 →	Mar 23, 8:06 pm EDT	Atara Biotherapeutics, Inc.ATRA	14,000	$20.65	$289,045	112,827	−11.0%	plan?
Mar 10, 2017 SForm 4 →	Mar 10, 7:57 pm EST	Atara Biotherapeutics, Inc.ATRA	24,000	$20.00	$480,000	126,827	−15.9%	plan?
Feb 21, 2017 SForm 4 →	Feb 22, 5:32 pm EST	Atara Biotherapeutics, Inc.ATRA	9,000	$15.14	$136,260	150,827	−5.63%	plan?
Feb 15, 2017 MForm 4 →	Feb 16, 8:11 pm EST	Atara Biotherapeutics, Inc.ATRA	10,501	—	—	159,827	—	plan?
Feb 6, 2017 AForm 4 →	Feb 8, 5:37 pm EST	Atara Biotherapeutics, Inc.ATRA	49,500	—	—	149,326	—	plan?
Nov 15, 2016 MForm 4 →	Nov 17, 4:53 pm EST	Atara Biotherapeutics, Inc.ATRA	10,503	—	—	99,826	—	plan?
Nov 10, 2016 SForm 4 →	Nov 14, 4:45 pm EST	Atara Biotherapeutics, Inc.ATRA	5,000	$19.84	$99,175	89,323	−5.30%	plan?
Oct 11, 2016 SForm 4 →	Oct 13, 5:22 pm EDT	Atara Biotherapeutics, Inc.ATRA	5,000	$17.47	$87,325	94,323	−5.03%	plan?
Aug 15, 2016 MForm 4 →	Aug 17, 7:46 pm EDT	Atara Biotherapeutics, Inc.ATRA	10,501	—	—	99,323	—	plan?
May 16, 2016 SForm 4 →	May 18, 7:06 pm EDT	Atara Biotherapeutics, Inc.ATRA	5,395	$15.77	$85,079	88,822	−5.73%	plan?
May 16, 2016 MForm 4 →	May 18, 7:06 pm EDT	Atara Biotherapeutics, Inc.ATRA	10,503	—	—	94,217	—	plan?
Feb 16, 2016 SForm 4 →	Feb 18, 8:11 pm EST	Atara Biotherapeutics, Inc.ATRA	6,000	$15.49	$92,940	83,714	−6.69%	plan?
Feb 16, 2016 MForm 4 →	Feb 18, 8:11 pm EST	Atara Biotherapeutics, Inc.ATRA	10,501	—	—	89,714	—	plan?
Feb 9, 2016 AForm 4 →	Feb 11, 8:49 pm EST	Atara Biotherapeutics, Inc.ATRA	42,857	—	—	79,213	—	plan?
Nov 30, 2015 SForm 4 →	Dec 1, 6:52 pm EST	Atara Biotherapeutics, Inc.ATRA	6,000	$40.00	$240,000	36,356	−14.2%	plan?
Nov 16, 2015 MForm 4 →	Nov 18, 6:58 pm EST	Atara Biotherapeutics, Inc.ATRA	10,502	—	—	42,356	—	plan?
Aug 18, 2015 SForm 4 →	Aug 19, 8:43 pm EDT	Atara Biotherapeutics, Inc.ATRA	6,000	$49.38	$296,280	31,854	−15.9%	plan?
Aug 17, 2015 MForm 4 →	Aug 19, 8:43 pm EDT	Atara Biotherapeutics, Inc.ATRA	10,502	—	—	37,854	—	plan?
Jun 15, 2015 SForm 4 →	Jun 16, 8:09 pm EDT	Atara Biotherapeutics, Inc.ATRA	10,000	$50.00	$500,000	27,352	−26.8%	plan?
May 29, 2015 SForm 4 →	Jun 1, 5:37 pm EDT	Atara Biotherapeutics, Inc.ATRA	10,000	$40.00	$400,000	37,352	−21.1%	plan?
May 15, 2015 FMForm 4 →	May 19, 6:55 pm EDT	Atara Biotherapeutics, Inc.ATRA	95,762	$37.30	$1,134,107	47,352	—	plan?
Jan 16, 2015 AForm 4 →	Jan 21, 4:42 pm EST	Atara Biotherapeutics, Inc.ATRA	12,400	—	—	12,400	—	plan?

Reported trades — derivatives (options, RSUs, warrants)

Trade	Reported (ET)	Company	Shares	Avg price	Total	Owned after	Δ stake
Feb 15, 2018 MForm 4 →	Feb 20, 8:22 pm EST	Atara Biotherapeutics, Inc.ATRA	5,132	—	—	0	—
Feb 6, 2018 AForm 4 →	Feb 8, 5:43 pm EST	Atara Biotherapeutics, Inc.ATRA	50,000	—	—	50,000	—
Jan 12, 2018 MForm 4 →	Jan 12, 7:56 pm EST	Atara Biotherapeutics, Inc.ATRA	30,000	—	—	10,000	—
Nov 15, 2017 MForm 4 →	Nov 17, 6:24 pm EST	Atara Biotherapeutics, Inc.ATRA	7,697	—	—	5,132	—
Aug 15, 2017 MForm 4 →	Aug 17, 5:36 pm EDT	Atara Biotherapeutics, Inc.ATRA	7,697	—	—	12,829	—
May 15, 2017 MForm 4 →	May 17, 5:01 pm EDT	Atara Biotherapeutics, Inc.ATRA	8,633	—	—	20,526	—
Feb 15, 2017 MForm 4 →	Feb 16, 8:11 pm EST	Atara Biotherapeutics, Inc.ATRA	10,501	—	—	28,224	—
Nov 15, 2016 MForm 4 →	Nov 17, 4:53 pm EST	Atara Biotherapeutics, Inc.ATRA	10,503	—	—	35,921	—
Aug 15, 2016 MForm 4 →	Aug 17, 7:46 pm EDT	Atara Biotherapeutics, Inc.ATRA	10,501	—	—	43,619	—
May 16, 2016 MForm 4 →	May 18, 7:06 pm EDT	Atara Biotherapeutics, Inc.ATRA	10,503	—	—	51,316	—
Feb 16, 2016 MForm 4 →	Feb 18, 8:11 pm EST	Atara Biotherapeutics, Inc.ATRA	10,501	—	—	59,014	—
Dec 17, 2015 AForm 4 →	Dec 21, 5:05 pm EST	Atara Biotherapeutics, Inc.ATRA	65,000	—	—	65,000	—
Nov 16, 2015 MForm 4 →	Nov 18, 6:58 pm EST	Atara Biotherapeutics, Inc.ATRA	10,502	—	—	66,711	—
Aug 17, 2015 MForm 4 →	Aug 19, 8:43 pm EDT	Atara Biotherapeutics, Inc.ATRA	10,502	—	—	74,408	—
May 15, 2015 AForm 4 →	May 19, 6:55 pm EDT	Atara Biotherapeutics, Inc.ATRA	65,357	—	—	82,106	—
Jan 16, 2015 MForm 4 →	Jan 21, 4:42 pm EST	Atara Biotherapeutics, Inc.ATRA	41,333	—	—	41,333	—