X0306 4 2016-11-02 0 0001666134 BLACKLINE, INC. BL 0001688124 Griffith William J.G. C/O ICONIQ STRATEGIC PARTNERS 394 PACIFIC AVENUE, 2ND FLOOR SAN FRANCISCO CA 94111 1 0 1 0 Common Stock 2016-11-02 4 P 0 659483 17.00 A 6367008 I See Footnotes Common Stock 2016-11-02 4 P 0 165517 17.00 A 1597991 I See Footnotes Common Stock 10253570 I See Footnote ICONIQ Strategic Partners, L.P. ("ICONIQ") is the direct owner of these securities. ICONIQ Strategic Partners-B, L.P. ("ICONIQ B") is the direct owner of these securities. Iconiq Strategic Partners GP, L.P. ("ICONIQ GP") is the sole general partner of each of ICONIQ, ICONIQ B, ICONIQ Strategic Partners Co-Invest, L.P., BL Series ("ICONIQ BL") and ICONIQ Strategic Partners Co-Invest, L.P., BL2 Series ("ICONIQ BL2") (collectively, the "Funds"). ICONIQ Strategic Partners TT GP, Ltd. (the "ICONIQ Parent GP") is the sole general partner of ICONIQ GP. The Reporting Person is an equity holder and director of ICONIQ Parent GP. The Reporting Person disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), except to the extent of his pecuniary interest therein, if any. This report shall not be deemed an admission that the Reporting Person is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose. This number represents shares held by ICONIQ (6,367,008), ICONIQ B (1,597,991), ICONIQ BL (2,000,000), and ICONIQ BL2 (288,571) respectively. The Reporting Person disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of his pecuniary interest therein, if any. This report shall not be deemed an admission that the Reporting Person is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose. /s/ William J.G. Griffith 2016-11-02