SEC Form 4 · accession 0001209191-15-067016
Atara Biotherapeutics, Inc. · ATRA
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Mitchall G. Clark
Officer — Chief R & QA Officer
Period of report
Aug 17, 2015
Accepted (ET)
Aug 19, 2015 · 8:35 pm EDT
Rule 10b5-1 plan
unknown — predates the checkbox
Issuer CIK
0001604464
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common StockF1 | Aug 17, 2015 | M | 9,615 | $0.00 | A | 40,199 | D | |
| Common Stock | Aug 17, 2015 | M | 1,291 | $25.15 | A | 41,490 | D | |
| Common Stock | Aug 17, 2015 | M | 469 | $11.00 | A | 41,959 | D | |
| Common Stock | Aug 17, 2015 | S | 7,829 | $46.19 | D | 34,130 | D |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Restricted Stock UnitsF3,F4,F5 | — | Aug 17, 2015 | M | 9,615 | D | — | — | Common Stock | 9,615 | 74,519 | D |
| Employee Stock Option (Right to Buy)F6 | $25.15 | Aug 17, 2015 | M | 1,291 | D | — | Jan 16, 2022 | Common Stock | 1,291 | 40,042 | D |
| Employee Stock Option (Right to Buy)F7 | $11.00 | Aug 17, 2015 | M | 469 | D | — | Oct 14, 2021 | Common Stock | 469 | 14,531 | D |
Explanation of responses
- F1Shares issued upon settlement of vested restricted stock units ("RSUs").
- F2Transaction pursuant to Rule 10b5-1 Plan adopted May 15, 2015.
- F3Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock or a cash settlement.
- F4The 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.
- F5The earlier of (i) March 27, 2021 or (ii) the recepient's termination date.
- F61/48th of the shares subject to the stock option vest and become exercisable each month following January 16, 2015.
- F71/48th of the shares subject to the stock option vest and become exercisable each month following October 15, 2014.