Home > Insider Trading > Filing (0001209191-18-030727)

Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1604464	Atara Biotherapeutics Inc.	ATRA	Biological Products, (No Disgnostic Substances) (2836)	460920988

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1706400	Derrell Porter	C/O Atara Biotherapeutics, Inc. 611 Gateway Boulevard, Suite 900 South San Francisco CA 94080	Svp, Head Of Global Commercial	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2018-05-15	16,334	$14.30	28,834	No	4	M	Direct
Common Stock	Disposition	2018-05-15	16,334	$45.02	12,500	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Employee Stock Option (Right to Buy)	Disposition	2018-05-15	16,334	$0.00	16,334	$14.30

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
113,666		2024-05-10	No	4	M	Direct

Footnotes

Transaction pursuant to Rule 10b5-1 Plan adopted March 9, 2018.
The price in Column 4 is a weighted average sale price. The prices actually received ranged from $45.00 to $45.05. The reporting person will provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, information regarding the number of shares sold at each price within the range
25% of the shares subject to the option vest and become exercisable on May 10, 2018 and 1/48th of the shares subject to the stock option vest and become exercisable each full month thereafter.