X0306 4 2016-02-23 0001418091 TWITTER, INC. TWTR 0001624030 Messinger Adam C/O TWITTER, INC. 1355 MARKET STREET, SUITE 900 SAN FRANCISCO CA 94103 1 Chief Technology Officer Common Stock 2016-02-23 4 M 0 5896 14.42 A 1519130 D Common Stock 2016-02-23 4 S 0 17077 18.63 D 1502053 D Employee Stock Option (right to buy) 14.42 2016-02-23 4 M 0 5896 0 D 2022-04-11 Common Stock 5896 31214 D The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person. Of the reported shares 1,474,133 shares are represented by RSUs. An option to purchase 155,376 shares was granted on April 12, 2012 and was exercised in part prior to the date on which the Reporting Person became subject to Section 16. As of the date of this transaction, of the outstanding shares, 11,792 are vested and exercisable and the remaining 19,422 vest on April 1, 2016. /s/ Sean Edgett, Attorney-in-Fact 2016-02-25