X0306 4 2019-01-15 0001418091 TWITTER, INC. TWTR 0001591174 Williams Evan Clark C/O TWITTER, INC. 1355 MARKET STREET, SUITE 900 SAN FRANCISCO CA 94103 1 Common Stock 2019-01-15 4 S 0 3968 33.0205 D 191933 I See footnote Common Stock 2019-01-16 4 S 0 3968 32.7305 D 187965 I See footnote Common Stock 2019-01-15 4 S 0 4255 33.0431 D 205773 I See footnote Common Stock 2019-01-16 4 S 0 4255 32.7231 D 201518 I See footnote Common Stock 2019-01-15 4 S 0 30133 33.0205 D 452017 I See footnote Common Stock 2019-01-16 4 S 0 30133 32.7305 D 421884 I See footnote Common Stock 2019-01-15 4 S 0 24643 33.0215 D 1191144 D Common Stock 2019-01-16 4 S 0 24643 32.741 D 1166501 D Common Stock 2019-01-15 4 S 0 277987 33.0219 D 10847478 I See footnote Common Stock 2019-01-16 4 S 0 277987 32.7409 D 10569491 I See footnote Common Stock 2019-01-15 4 S 0 135 33.0158 D 8794 I See footnote Common Stock 2019-01-16 4 S 0 135 32.7394 D 8659 I See footnote The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted 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 $32.70 to $33.33 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. The shares are held of record by Green Monster Trust dated November 7, 2012, for which the Goldman Sachs Trust Company serves as trustee. The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $32.45 to $33.26 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. The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $32.52 to $33.315 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. The shares are held of record by The Family Trust under the Williams 2010 Qualified Annuity Trust 1 dated August 31, 2010, for which the Reporting Person's spouse serves as trustee. The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $32.46 to $33.18 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. The shares are held of record by the Article IV Family Trust Under Williams 2010 Qualified Annuity Trust 5, for which the Reporting Person's spouse and the Goldman Sachs Trust Company serve as co-trustees. The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $32.57 to $33.345 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. The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $32.46 to $33.26 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. The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $32.51 to $33.34 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. The shares are held of record by Obvious, LLC, for which the Reporting Person serves as the sole member. The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $32.46 to $33.275 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. The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $32.53 to $33.325 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. The shares are held of record by the Reporting Person's spouse. The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $32.46 to $33.13 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. /s/ Sean Edgett, Attorney-in-Fact 2019-01-17