13D Filing: Silver Lake Partners and Cornerstone Ondemand Inc (CSOD)

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Item 1. Security and Issuer

This Schedule 13D (the Schedule 13D) relates to the shares of common
stock, par value $0.0001 per share (the Common Stock), of Cornerstone OnDemand, Inc., a Delaware corporation (the Issuer). The principal executive offices of the Issuer are located at 1601 Cloverfield Blvd., Suite 620 South,
Santa Monica, CA 90404.

Item 2. Identity and Background

(a) and (f) This Schedule 13D is being filed jointly on behalf of the
following persons (collectively, the Reporting Persons), each of which is a Delaware entity:

1. SLP Chicago Holdings, L.P.
(SLP Chicago),

2. SLP Chicago GP, L.L.C. (SLPC GP),

3. Silver Lake Credit Associates, L.P. (SLCA),

4. SLCA (GP), L.L.C. (SLCA GP),

5. SLC Chicago Co-Invest II, L.P. (Co-Invest)

6. SLC Co-Invest, GP, L.L.C. (Co-Invest GP)

7. Silver Lake Group, L.L.C. (SLG and, together with SLP Chicago, SLPC GP, SLCA, SLCA GP,
Co-Invest and Co-Invest GP, Silver Lake).

The Reporting
Persons have entered into an agreement of joint filing, a copy of which is attached hereto as Exhibit A.

(b) and (c) The general partner of SLP
Chicago is SLPC GP. The managing member of SLPC GP is SLCA. The general partner of SLCA is SLCA GP. The general partner of Co-Invest is Co-Invest GP. The managing member
of each of SLCA GP and Co-Invest GP is SLG. Certain information concerning the identity and background of each of the managing members of SLG is set forth in Annex A attached hereto, which is incorporated
herein by reference in response to this Item 2.

The principal business of each of SLP Chicago and Co-Invest
is to invest in securities. The principal business of SLPC GP is to serve as the general partner of SLP Chicago. The principal business of SLCA is to serve as the managing member of SLPC GP and to manage investments through other partnerships and
limited liability companies. The principal business of SLCA GP is to serve as the general partner of SLCA and to manage investments through other partnerships and limited liability companies. The principal business of
Co-Invest GP is to serve as the general partner of Co-Invest. The principal business of SLG is to serve as the managing member of each of SLCA GP and Co-Invest and to manage investments through other partnerships and limited liability companies.

The principal office of
each of the Reporting Persons is located at c/o Silver Lake, 2775 Sand Hill Road, Suite 100, Menlo Park, California 94025.

(d) and (e) None of the
Reporting Persons nor, to the best knowledge of the Reporting Persons, any of the persons listed on Annex A attached hereto has, during the past five years, been convicted of any criminal proceeding (excluding traffic violations or similar
misdemeanors), nor been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or
prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.

Item 3. Source and Amount of Funds or Other Consideration

The information set forth in or incorporated by
reference in Item 6 of this Schedule 13D is incorporated by reference in its entirety into this Item 3.

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