| Date | Name | Title | Type | Security | Shares | Price | Value | Ownership | Reported |
| 05/21/2013 | STANGER GREGORY S | Director | Disposition | Restricted Stock Units | 3.4k | $0.00 | $0 | | 05/21/2013 |
| 05/21/2013 | STANGER GREGORY S | Director | Disposition | Class A Common Stock | 6.6k | $0.00 | $0 | | 05/21/2013 |
| 05/21/2013 | JONES TERRELL B | Director | Disposition | Class A Common Stock | 318.1k | $0.00 | $0 | | 05/21/2013 |
| 05/21/2013 | JONES TERRELL B | Director | Disposition | Restricted Stock Units | 3.4k | $0.00 | $0 | | 05/21/2013 |
| 05/21/2013 | MORITZ MICHAEL J | 10% Owner | Disposition | Class A Common Stock | 69.9k | $0.00 | $0 | By Sequoia Capital Growth Fund III, LP | 05/21/2013 |
| 05/21/2013 | MORITZ MICHAEL J | 10% Owner | Disposition | Class A Common Stock | 765 | $0.00 | $0 | By Sequoia Capital Growth Partners III, LP | 05/21/2013 |
| 05/21/2013 | MORITZ MICHAEL J | 10% Owner | Disposition | Class A Common Stock | 3.6k | $0.00 | $0 | By Sequoia Capital Growth III Principals Fund, LLC | 05/21/2013 |
| 05/21/2013 | MORITZ MICHAEL J | 10% Owner | Disposition | Class B Common Stock | 99.7k | $0.00 | $0 | By Sequoia Technology Partners XI, LP | 05/21/2013 |
| 05/21/2013 | MORITZ MICHAEL J | 10% Owner | Disposition | Class B Common Stock | 343.2k | $0.00 | $0 | By Sequoia Capital XI Principals Fund, LLC | 05/21/2013 |
| 05/21/2013 | MORITZ MICHAEL J | 10% Owner | Disposition | Class B Common Stock | 3.2M | $0.00 | $0 | By Sequoia Capital XI, LP | 05/21/2013 |
| 05/21/2013 | MORITZ MICHAEL J | 10% Owner | Disposition | Class B Common Stock | 2.3M | $0.00 | $0 | By Sequoia Capital Growth Fund III, LP | 05/21/2013 |
| 05/21/2013 | MORITZ MICHAEL J | 10% Owner | Disposition | Class B Common Stock | 22.3k | $0.00 | $0 | By Sequoia Capital Growth Partners III, LP | 05/21/2013 |
| 05/21/2013 | MORITZ MICHAEL J | 10% Owner | Disposition | Class B Common Stock | 111.7k | $0.00 | $0 | By Sequoia Capital Growth III Principals Fund, LLC | 05/21/2013 |
| 05/21/2013 | General Catalyst GP II, LLC | 10% Owner | Other (disposition) | Class A Common Stock | 9.3k | $0.00 | $0 | See footnote | 05/21/2013 |
| 05/21/2013 | General Catalyst GP II, LLC | 10% Owner | Other (disposition) | Class A Common Stock | 9.3k | $0.00 | $0 | See footnote | 05/21/2013 |
| 05/21/2013 | General Catalyst GP II, LLC | 10% Owner | Other (disposition) | Class A Common Stock | 55.7k | $0.00 | $0 | See footnote | 05/21/2013 |
| 05/21/2013 | General Catalyst GP II, LLC | 10% Owner | Other (disposition) | Class B Common Stock | 4.3M | $0.00 | $0 | See footnote | 05/21/2013 |
| 05/21/2013 | General Catalyst GP II, LLC | 10% Owner | Other (disposition) | Class B Common Stock | 4.3M | $0.00 | $0 | See footnote | 05/21/2013 |
| 05/21/2013 | General Catalyst GP II, LLC | 10% Owner | Other (disposition) | Class B Common Stock | 1.6M | $0.00 | $0 | See footnote | 05/21/2013 |
| 05/21/2013 | General Catalyst GP II, LLC | 10% Owner | Other (disposition) | Class A Common Stock | 9.3k | $0.00 | $0 | See footnote | 05/21/2013 |
| 05/21/2013 | General Catalyst GP II, LLC | 10% Owner | Other (disposition) | Class A Common Stock | 9.3k | $0.00 | $0 | See footnote | 05/21/2013 |
| 05/21/2013 | General Catalyst GP II, LLC | 10% Owner | Other (disposition) | Class A Common Stock | 55.7k | $0.00 | $0 | See footnote | 05/21/2013 |
| 05/21/2013 | General Catalyst GP II, LLC | 10% Owner | Other (disposition) | Class B Common Stock | 4.3M | $0.00 | $0 | See footnote | 05/21/2013 |
| 05/21/2013 | General Catalyst GP II, LLC | 10% Owner | Other (disposition) | Class B Common Stock | 4.3M | $0.00 | $0 | See footnote | 05/21/2013 |
| 05/21/2013 | General Catalyst GP II, LLC | 10% Owner | Other (disposition) | Class B Common Stock | 1.6M | $0.00 | $0 | See footnote | 05/21/2013 |
| 05/21/2013 | Cutler Joel E | 10% Owner | Disposition | Class B Common Stock | 1.6M | $0.00 | $0 | See footnote | 05/21/2013 |
| 05/21/2013 | Cutler Joel E | 10% Owner | Disposition | Class B Common Stock | 4.3M | $0.00 | $0 | See footnote | 05/21/2013 |
| 05/21/2013 | Cutler Joel E | 10% Owner | Disposition | Class B Common Stock | 4.3M | $0.00 | $0 | See footnote | 05/21/2013 |
| 05/21/2013 | Cutler Joel E | 10% Owner | Disposition | Class A Common Stock | 55.7k | $0.00 | $0 | See footnote | 05/21/2013 |
| 05/21/2013 | Cutler Joel E | 10% Owner | Disposition | Class A Common Stock | 9.3k | $0.00 | $0 | See footnote | 05/21/2013 |
| 05/21/2013 | Cutler Joel E | 10% Owner | Disposition | Class A Common Stock | 9.3k | $0.00 | $0 | See footnote | 05/21/2013 |
| 05/21/2013 | MELNICK KEITH D | Chief Commercial Officer | Disposition | Stock Option (right to buy) | 13.2k | $1.00 | $13.2k | | 05/21/2013 |
| 05/21/2013 | MELNICK KEITH D | Chief Commercial Officer | Disposition | Stock Option (right to buy) | 22.8k | $1.40 | $32k | | 05/21/2013 |
| 05/21/2013 | MELNICK KEITH D | Chief Commercial Officer | Disposition | Stock Option (right to buy) | 38.2k | $1.40 | $53.6k | | 05/21/2013 |
| 05/21/2013 | MELNICK KEITH D | Chief Commercial Officer | Disposition | Stock Option (right to buy) | 19.9k | $2.98 | $59.3k | | 05/21/2013 |
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