X0306 4 2020-10-01 0 0001512673 Square, Inc. SQ 0001735067 Whiteley Sivan 1455 MARKET STREET SUITE 600 SAN FRANCISCO CA 94103 0 1 0 0 Gen. Counsel & Corp. Secretary Class A Common Stock 2020-10-01 4 F 0 4756 168.49 D 130850 D Class A Common Stock 2020-10-01 4 S 0 700 165.59 D 130150 D Class A Common Stock 2020-10-01 4 S 0 1639 166.58 D 128511 D Class A Common Stock 2020-10-01 4 S 0 1650 167.53 D 126861 D Class A Common Stock 2020-10-01 4 S 0 346 168.35 D 126515 D Represents shares that have been withheld by the Issuer to satisfy its income tax and withholding and remittance obligations in connection with the net settlement of restricted stock and restricted stock units and does not represent a sale by the Reporting Person. The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan. The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $165.08 to $165.96 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 $166.10 to $167.07 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 $167.13 to $168.12 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 $168.13 to $168.52 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/ Susan Szotek, Attorney-in-Fact 2020-10-05