X0306 4 2014-07-31 false 0001418091 TWITTER, INC. TWTR 0001590847 Costolo Richard 1355 MARKET STREET, SUITE 900 SAN FRANCISCO CA 94103 true true false false Chief Executive Officer Common Stock 566920 I See Footnote Common Stock 2014-07-31 4 S false 16698 45.34 D 565962 D The shares are held of record by the Richard Costolo 2001 Living Trust dated February 8, 2001, for which the Reporting Person serves as trustee, and the Lorin Costolo 2001 Living Trust dated February 8, 2001, for which the Reporting Person's spouse serves as trustee. Represents the number of shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of RSUs. This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the Reporting Person. The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $44.88 to $45.72 per share. The Reporting Person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Of the reported shares, 546,244 shares are represented by RSUs. /s/ Sean Edgett, Attorney-in-Fact 2014-08-01