Filing Details

Accession Number:
0001209191-15-067016
Form Type:
4
Zero Holdings:
No
Publication Time:
2015-08-19 20:35:42
Reporting Period:
2015-08-17
Filing Date:
2015-08-19
Accepted Time:
2015-08-19 20:35:42
SEC Url:
Form 4 Filing
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
1612094 G. Mitchall Clark 701 Gateway Boulevard
Suite 200
South San Francisco CA 94080
Chief R & Qa Officer 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 2015-08-17 9,615 $0.00 40,199 No 4 M Direct
Common Stock Acquisiton 2015-08-17 1,291 $25.15 41,490 No 4 M Direct
Common Stock Acquisiton 2015-08-17 469 $11.00 41,959 No 4 M Direct
Common Stock Disposition 2015-08-17 7,829 $46.19 34,130 No 4 S Direct
Equity Swap Involved Form Type Code Nature of Ownership Explanation
No 4 M Direct
No 4 M Direct
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 Restricted Stock Units Disposition 2015-08-17 9,615 $0.00 9,615 $0.00
Common Stock Employee Stock Option (Right to Buy) Disposition 2015-08-17 1,291 $0.00 1,291 $25.15
Common Stock Employee Stock Option (Right to Buy) Disposition 2015-08-17 469 $0.00 469 $11.00
Remaning Holdings Exercise Date Expiration Date Equity Swap Involved Transaction Form Type Transaction Code Nature of Ownership
74,519 No 4 M Direct
40,042 2022-01-16 No 4 M Direct
14,531 2021-10-14 No 4 M Direct
Footnotes
  1. Shares issued upon settlement of vested restricted stock units ("RSUs").
  2. Transaction pursuant to Rule 10b5-1 Plan adopted May 15, 2015.
  3. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock or a cash settlement.
  4. The RSUs were granted with both (a) a liquidity event-based vesting condition and (b) a service-based vesting condition, both of which conditions must be satisfied in order for the RSUs to vest. The liquidity event-based condition was satisfied upon the closing of the Issuer's initial public offering (the "IPO"). The shares that vested on the closing date of the IPO, and the shares that vested thereafter through May 15, 2015, were settled on May 15, 2015. The service-based vesting condition provides that 25% of the total number of shares on March 17, 2015 and 1/48th of the total number of shares monthly thereafter, subject to the holder's continuous service through each such date.
  5. The earlier of (i) March 27, 2021 or (ii) the recepient's termination date.
  6. 1/48th of the shares subject to the stock option vest and become exercisable each month following January 16, 2015.
  7. 1/48th of the shares subject to the stock option vest and become exercisable each month following October 15, 2014.