X0306 4 2019-12-03 0 0001666134 BLACKLINE, INC. BL 0001575779 ICONIQ Strategic Partners, L.P. C/O ICONIQ STRATEGIC PARTNERS 394 PACIFIC AVENUE, 2ND FLOOR SAN FRANCISCO CA 94111 0 0 1 0 0001584545 ICONIQ Strategic Partners-B, L.P. C/O ICONIQ STRATEGIC PARTNERS 394 PACIFIC AVENUE, 2ND FLOOR SAN FRANCISCO CA 94111 0 0 1 0 0001688390 ICONIQ Strategic Partners GP, L.P. C/O ICONIQ STRATEGIC PARTNERS 394 PACIFIC AVENUE, 2ND FLOOR SAN FRANCISCO CA 94111 0 0 1 0 0001688389 ICONIQ Strategic Partners TT GP, Ltd. C/O ICONIQ STRATEGIC PARTNERS 394 PACIFIC AVENUE, 2ND FLOOR SAN FRANCISCO CA 94111 0 0 1 0 0001688143 Makan Divesh C/O ICONIQ STRATEGIC PARTNERS 394 PACIFIC AVENUE, 2ND FLOOR SAN FRANCISCO CA 94111 0 0 1 0 Common Stock 2019-12-03 4 S 0 9209 D 653848 D Common Stock 2019-12-03 4 S 0 2311 D 164103 D Common Stock 2019-12-04 4 S 0 8393 D 645455 D Common Stock 2019-12-04 4 S 0 2107 D 161996 D Common Stock 2019-12-05 4 S 0 1039 D 644416 D Common Stock 2019-12-05 4 S 0 261 D 161735 D Common Stock 1068472 I See Footnote Common Stock 223884 D 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 and ICONIQ B (collectively, the "Funds"). ICONIQ Strategic Partners TT GP, Ltd. (the "ICONIQ Parent GP") is the sole general partner of ICONIQ GP. Divesh Makan ("Makan") is an equity holder and director of ICONIQ Parent GP. Each of ICONIQ GP, ICONIQ Parent GP and Makan 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 its or his pecuniary interest therein, if any. This report shall not be deemed an admission that any of the Reporting Persons 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 (644,416), ICONIQ B (161,735), ICONIQ Strategic Partners Co-Invest, L.P., BL Series (229,245), and ICONIQ Strategic Partners Co-Invest, L.P., BL2 Series (33,076) respectively. Each of ICONIQ GP, ICONIQ Parent GP and Makan disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its or his pecuniary interest therein, if any. This report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose. These shares are directly held by Makan through a family trust that he controls. These shares were sold in multiple transactions at prices ranging from $52.00 - $52.05, inclusive. 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. These shares were sold in multiple transactions at prices ranging from $52.00 - $52.41, inclusive. 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. These shares were sold in multiple transactions at prices ranging from $52.03 - $52.21, inclusive. 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 Funds are party to a Stockholders' Agreement, dated as of October 27, 2016 (the "Stockholders' Agreement"), by and among entities affiliated with each of Silver Lake Sumeru Fund, L.P., Silver Lake Technology Investors Sumeru, L.P., Therese Tucker and Mario Spanicciati (collectively, the "Other Stockholders") and the Company. By virtue of being a party to the Stockholders' Agreement, each of the Funds may be deemed to be members of a "group", as defined in Rule 13d-5 of the Exchange Act, with the Other Stockholders and/or certain of their affiliates. This report does not include any shares of the Common Stock owned by the Other Stockholders, and each of the Funds and the other reporting persons on this report disclaims beneficial ownership of all such shares for all purposes. ICONIQ Strategic Partners, L.P., by ICONIQ Strategic Partners GP, L.P., its general partner, by ICONIQ Strategic Partners TT GP, Ltd., its general partner, by Kevin Foster, its Senior Vice President, /s/ Kevin Foster 2019-12-05 ICONIQ Strategic Partners-B, L.P., by ICONIQ Strategic Partners GP, L.P., its general partner, by ICONIQ Strategic Partners TT GP, Ltd., its general partner, by Kevin Foster, its Senior Vice President, /s/ Kevin Foster 2019-12-05 ICONIQ Strategic Partners GP, L.P., by ICONIQ Strategic Partners TT GP, Ltd., its general partner, by Kevin Foster, its Senior Vice President, /s/ Kevin Foster 2019-12-05 ICONIQ Strategic Partners TT GP, Ltd., by Kevin Foster, its Senior Vice President, /s/ Kevin Foster 2019-12-05 Divesh Makan, /s/ Divesh Makan 2019-12-05