X0306 4 2021-07-13 0001512673 Square, Inc. SQ 0001222287 BOTHA ROELOF 2800 SAND HILL ROAD, SUITE 101 MENLO PARK CA 94025 1 0 0 0 Class A Common Stock 2021-07-13 4 A 0 11388 A 11388 I Sequoia Capital U.S. Venture Fund XV, L.P. Class A Common Stock 2021-07-13 4 A 0 479 A 479 I Sequoia Capital U.S. Venture Partners Fund XV (Q), L.P. Class A Common Stock 2021-07-13 4 A 0 171 A 171 I Sequoia Capital U.S. Venture Partners Fund XV, L.P. Class A Common Stock 2021-07-13 4 A 0 1750 A 1750 I Sequoia Capital U.S. Venture XV Principals Fund, L.P. Class A Common Stock 12206 D Class A Common Stock 1862 I Sequoia Capital U.S. Growth Fund IV, L.P. Class A Common Stock 77 I Sequoia Capital USGF Principals Fund IV, L.P. Class A Common Stock 684741 I By estate planning vehicle Represents shares of Class A Common Stock of the Issuer received on July 13, 2021 as transaction consideration pursuant to the Agreement and Plan of Merger, dated June 9, 2021, between the Issuer, Speramus, Inc. and the other parties thereto. SC US (TTGP), Ltd. is the general partner of SC U.S. Venture XV Management, L.P., which is the general partner of Sequoia Capital U.S. Venture Fund XV, L.P., Sequoia Capital U.S. Venture Partners Fund XV (Q), L.P., Sequoia Capital U.S. Venture Partners Fund XV, L.P. and Sequoia Capital U.S. Venture XV Principals Fund, L.P., or collectively, the SC USV XV Funds. The Reporting Person is a Director of SC US (TTGP), Ltd. The Reporting Person disclaims beneficial ownership of the securities held by the SC USV XV Funds except to the extent of his pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 or for any other purposes. SC US (TTGP), Ltd. is the general partner of SCGF IV Management, L.P., which is the general partner of Sequoia Capital U.S. Growth Fund IV, L.P. and Sequoia Capital USGF Principals Fund IV, L.P., or collectively, the SC GFIV Funds. The Reporting Person is a Director of SC US (TTGP), Ltd. The Reporting Person disclaims beneficial ownership of the securities held by the SC GFIV Funds except to the extent of his pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 or for any other purposes. /s/ Jung Yeon Son, Attorney-in-Fact for Roelof Botha 2021-09-15