X0306 4 2017-11-21 0 0001512673 Square, Inc. SQ 0001570658 Friar Sarah 1455 MARKET STREET SUITE 600 SAN FRANCISCO CA 94103 0 1 0 0 Chief Financial Officer Class A Common Stock 2017-11-15 5 A 0 E 917 10.23 A 355566 D Class A Common Stock 2017-11-21 4 C 0 38400 0.00 D 38400 I See Footnote Class A Common Stock 2017-11-21 4 S 0 7100 46.57 D 31300 I See Footnote Class A Common Stock 2017-11-21 4 S 0 10900 47.24 D 20400 I See Footnote Class A Common Stock 2017-11-21 4 S 0 1200 47.99 D 19200 I See Footnote Class A Common Stock 2017-11-22 4 S 0 8300 47.08 D 10900 I See Footnote Class A Common Stock 2017-11-22 4 S 0 9000 47.55 D 1900 I See Footnote Class A Common Stock 2017-11-22 4 S 0 1900 48.56 D 0 I See Footnote Class B Common Stock 2017-11-21 4 C 0 38400 0.00 D Class A Common Stock 38400 454716 I See Footnote Class B Common Stock Class A Common Stock 548453 548453 I See Footnote These shares were acquired under the Issuer's Employee Stock Purchase Plan in a transaction that was exempt under both Rule 16b-3(d) and Rule 16b-3(c). Represents the conversion of Class B Common Stock into Class A Common Stock held of record by the David Riley and Sarah Friar Revocable Trust dated August 11, 2006 (Revocable Trust) for which the Reporting Person serves as a trustee. The Reporting Person has sole dispositive power and voting control over the shares of the Issuer held by the Revocable Trust. The shares are held of record by the Revocable Trust. The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Revocable Trust. The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $45.90 to $46.89 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 $46.90 to $47.76 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 $47.90 to $48.18 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 reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $46.30 to $47.29 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 $47.30 to $48.15 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 $48.30 to $48.94 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. Each share of Class B Common Stock is convertible into one share of Class A Common Stock at the option of the holder and has no expiration date. The shares are held of record by The Sarah Friar 2015 GRAT, dated August 6, 2015, for which the Reporting Person serves as a trustee. /s/ Jason Gao, Attorney-in-Fact 2017-11-24