X0306 4 2016-02-10 0001418091 TWITTER, INC. TWTR 0001590850 Bain Adam C/O TWITTER, INC. 1355 MARKET STREET, SUITE 900 SAN FRANCISCO CA 94103 1 Chief Operating Officer Common Stock 2016-02-10 4 A 0 1850000 0 A 2315782 D Common Stock 2016-02-10 4 A 0 40000 0 A 2355782 D Common Stock 51243 I See footnote Of the reported shares, 1,850,000 shares are represented by restricted stock units (RSUs) granted on February 10, 2016, pursuant to which 25% of 1,055,000 RSUs will vest on May 1, 2016, and then 12.5% quarterly thereafter for the remaining 7 quarters, 25% of 465,000 RSUs will vest on February 1, 2018, and then quarterly thereafter for the remaining 3 quarters, 25% of 330,000 RSUs will vest on February 1, 2019, and then quarterly thereafter for the remaining 3 quarters. Of the reported shares 2,133,287 shares are represented by RSUs. Of the reported shares, 40,000 shares are represented by performance RSUs granted on February 10, 2016, pursuant to which the performance RSUs will be eligible to vest based on the Company's achievement of certain performance targets over the next year, with the Board of Directors or Compensation Committee setting the performance targets for the performance period in the first quarter of 2016 and in the first quarter of 2017 determining achievement against those performance targets. Of the reported shares 2,173,287 shares are represented by RSUs. The shares are held of record by The Bain 2013 Irrevocable Trust DTD 10/22/2013 for which the Reporting Person serves as trustee. /s/ Sean Edgett, Attorney-in-Fact 2016-02-12