| (a) | Name of Issuer: BlackLine, Inc. |
| (b) | Address of Issuer’s Principal Executive Offices: 21300 Victory Boulevard, 12th Floor, Woodland Hills, CA 91367 |
| (a) | Names of Person Filing: Therese Tucker |
| (b) | Address of Principal Business Office or, if none, Residence: The principal business address of the Reporting Person is: 21300 Victory Boulevard, 12th Floor, Woodland Hills, CA 91367 |
| (c) | Citizenship: Ms. Tucker is a U.S. Citizen |
| (d) | Title of Class of Securities: Common Stock |
| (e) | CUSIP Number: 09239B 109 |
Item 3. | If this statement is filed pursuant to§§240.13d-1(b) or240.13d-2(b) or (c), check whether the person filing is a: |
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(a) | | ☐ | | Broker or dealer registered under Section 15 of the Act (15 U.S.C 78c). |
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(b) | | ☐ | | Bank as defined in Section 3(a) (6) of the Act (15 U.S.C 78c). |
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(c) | | ☐ | | Insurance Company as defined in Section 3(a) (19) of the Act (15 U.S.C 78c). |
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(d) | | ☐ | | Investment Company registered under Section 8 of the Investment Company Act of 1940(15 U.S.C 80a-8). |
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(e) | | ☐ | | Investment Adviser in accordance with SS 240.13d-1(b) (1) (ii) (E); |
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(f) | | ☐ | | Employee Benefit Plan or Endowment Fund in accordance with SS 240.13d-1(b) (ii) (F); |
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(g) | | ☐ | | Parent Holding Company or Control Person in accordance with SS.SS.240.13d-1(b) (ii) (G); |
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(h) | | ☐ | | A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813); |
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(i) | | ☐ | | A church plan that is excluded from the definition of an investment company under Section 3(c) (14) of the Investment Company Act of1940(15 U.S.C 80a-3); |
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(j) | | ☐ | | Group, in accordance with SS 240.13d-1(b) (1) (ii) (J); |
Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.
| (a) | Amount beneficially owned:5,903,2801,2 |
Ms. Tucker, Mario Spanicciati, entities associated with Iconiq Strategic Partners, L.P. and entities affiliated with each of Silver Lake Sumeru Fund, L.P. and Silver Lake Technology Investors Sumeru, L.P. (collectively, the “Stockholders”) and the Company are parties to a Stockholder Agreement (the “Stockholder Agreement”), which contains, among other things, certain provisions relating to transfer of, and coordination of the voting of, securities of the Issuer by the parties thereto.
By virtue of the Stockholder Agreement and the obligations and rights thereunder, the Reporting Person, the Stockholders and/or certain of their affiliates may be deemed to constitute a “group” for purposes of Section 13(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). Based in part on information provided by the Issuer, such a “group” would be deemed to beneficially own an aggregate of 17,453,521 shares of Common Stock (which includes options to purchase 102,338 shares of Common Stock exercisable within 60 days of December 31, 2018 and 14,371 shares of Common Stock issuable pursuant to restricted stock units that are subject to vesting conditions within 60 days of December 31, 2018), or 31.87% of the Common Stock of the Issuer calculated pursuant toRule 13d-3. The Reporting Person expressly disclaims beneficial ownership over any shares of Common Stock that they may be deemed to beneficially own solely by reason of the Stockholder Agreement. Certain entities affiliated with Iconiq Strategic Partners, L.P., Silver Lake Sumeru Fund, L.P. and Silver Lake Technology Investors Sumeru, L.P. and Mario Spanicciati are separately making Schedule 13G filings reporting their beneficial ownership of shares of Common Stock.