SEC Form 4 · accession 0001209191-15-044649
Atara Biotherapeutics, Inc. · ATRA
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Isaac E. Ciechanover
Officer — Chief Executive Officer · Director
Period of report
May 15, 2015
Accepted (ET)
May 19, 2015 · 6:50 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 | May 15, 2015 | M | 31,508 | $0.00 | A | 69,508 | D | |
| Common Stock | May 15, 2015 | F | 14,801 | $37.30 | D | 54,707 | D | |
| Common StockF2 | holding | — | — | — | 392,300 | I | See footnote | |
| Common StockF3 | holding | — | — | — | 488,653 | I | See footnote | |
| Common StockF4 | holding | — | — | — | 180,000 | I | See footnote |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Restricted Stock UnitsF5,F6,F7 | — | May 15, 2015 | M | 31,508 | D | — | — | Common Stock | 31,508 | 63,015 | D |
Explanation of responses
- F1Shares issued upon settlement of vested restricted stock units ("RSUs").
- F2Shares are held by the Isaac E. Ciechanover and Allison M. Ciechanover Family Trust dated 8/8/08, of which the Reporting Person is a trustee.
- F3Sheld are held by the Ciechanover Family GRAT, of which the Reporting Person is a trustee.
- F4Sheld are held by the The Ciechanover 2015 GRAT, of which the Reporting Person is a trustee.
- F5Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock or a cash settlement.
- F6The 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 1/48th of the total number of shares shall vest monthly from January 10, 2014, subject to the holder's continuous service through each such date.
- F7The earlier of (i) January 10, 2021 or (ii) the recipient's termination date.