SEC Form 4 · accession 0001209191-15-005460
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
Jan 16, 2015
Accepted (ET)
Jan 21, 2015 · 4:39 pm EST
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 Stock | Jan 16, 2015 | A | 38,000 | $0.00 | A | 38,000 | D | |
| Common StockF1 | holding | — | — | — | 1,066,153 | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Employee Stock Option (Right to Buy)F2 | $25.15 | Jan 16, 2015 | A | 126,667 | A | — | Jan 16, 2022 | Common Stock | 126,667 | 126,667 | D |
Explanation of responses
- F1Includes 577,500 shares held by the Isaac E. Ciechanover and Allison M. Ciechanover Family Trust dated 8/8/08, of which the Reporting Person is a trustee, and 488,653 shares held by the Ciechanover Family GRAT, of which the Reporting Person is a trustee.
- F21/48th of the shares subject to the stock option vest and become exercisable each month following January 16, 2015.