FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * Osnoss Joseph   2. Issuer Name and Ticker or Trading Symbol Cornerstone OnDemand Inc [CSOD] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O SILVER LAKE, 2775 SAND HILL, ROAD, SUITE 100 3. Date of Earliest Transaction (Month/Day/Year) 12/08/2017 (Street) MENLO PARK, CA 94025 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) ___ Form filed by One Reporting Person _X_ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock (1) 12/08/2017   A   10,760 (2) A $ 0 10,760 I See footnote (3)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Osnoss Joseph C/O SILVER LAKE, 2775 SAND HILL ROAD, SUITE 100 MENLO PARK, CA 94025	X
Silver Lake Group, L.L.C. C/O SILVER LAKE 2775 SAND HILL ROAD, SUITE 100 MENLO PARK, CA 94025	X	X
SLCA (GP), L.L.C. C/O SILVER LAKE 2775 SAND HILL ROAD, SUITE 100 MENLO PARK, CA 94025	X	X
Silver Lake Credit Associates, L.P. C/O SILVER LAKE 2775 SAND HILL ROAD, SUITE 100 MENLO PARK, CA 94025	X	X
SLP Chicago GP, L.L.C. C/O SILVER LAKE 2775 SAND HILL ROAD, SUITE 100 MENLO PARK, CA 94025	X	X
SLP Chicago Holdings, L.P. C/O SILVER LAKE 2775 SAND HILL ROAD, SUITE 100 MENLO PARK, CA 94025	X	X
SLC Chicago Co-Invest II, L.P. C/O SILVER LAKE 2775 SAND HILL ROAD, SUITE 100 MENLO PARK, CA 94025	X	X
SLC Co-Invest, GP, L.L.C. C/O SILVER LAKE 2775 SAND HILL ROAD, SUITE 100 MENLO PARK, CA 94025	X	X

Signatures

/s/ Karen M. King, Director, on behalf of Silver Lake Group, L.L.C.		12/12/2017
**Signature of Reporting Person		Date
/s/ Karen M. King, Director, on behalf of Silver Lake Group, L.L.C., managing member of SLCA (GP), L.L.C.		12/12/2017
**Signature of Reporting Person		Date
/s/ Karen M. King, Director, on behalf of Silver Lake Group, L.L.C., managing member of SLCA (GP), L.L.C., general partner of SLCA		12/12/2017
**Signature of Reporting Person		Date
/s/ Karen M. King, Director, on behalf of Silver Lake Group, L.L.C., managing member of SLC Co-Invest, GP, L.L.C.		12/12/2017
**Signature of Reporting Person		Date
/s/ Karen M. King, Director, on behalf of Silver Lake Group, L.L.C., managing member of SLCA (GP), L.L.C., general partner of SLCA, managing member of SLP Chicago GP, L.L.C.		12/12/2017
**Signature of Reporting Person		Date
/s/ Karen M. King, Director, on behalf of Silver Lake Group, L.L.C., managing member of SLC Co-Invest, GP, L.L.C., general partner of SLC Chicago Co-Invest II, L.P.		12/12/2017
**Signature of Reporting Person		Date
/s/ Karen M. King, Director, on behalf of Silver Lake Group, L.L.C., managing member of SLCA (GP), L.L.C., general partner of SLCA, managing member of SLP Chicago GP, L.L.C., general partner of SLP Chicago Holdings, L.P.		12/12/2017
**Signature of Reporting Person		Date
/s/ Joseph Osnoss		12/12/2017
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	This Form 4 is filed by SLP Chicago Holdings, L.P. ("SLP Chicago"), SLC Chicago Co-Invest II, L.P. ("Co-Invest"), SLP Chicago GP, L.L.C. ("SLP Chicago GP"), SLC Co-Invest, GP, L.L.C., ("Co-Invest GP"), Silver Lake Credit Associates, L.P. ("SLCA"), SLCA (GP), L.L.C. ("SLCA GP"), Silver Lake Group, L.L.C. ("SLG") and Mr. Joseph Osnoss. SLP Chicago GP is the general partner of SLP Chicago. Co-Invest GP is the general partner of Co-Invest. SLCA is the managing member of SLP Chicago GP. SLCA GP is the general partner of SLCA. SLG is the managing member of SLCA GP and Co-Invest GP. Mr. Osnoss serves as a member of the board of directors of Cornerstone OnDemand, Inc. (the "Issuer") and is a Managing Director of SLG. Each of SLP Chicago, Co-Invest, SLP Chicago GP, Co-Invest GP, SLCA, SLCA GP and SLG may be deemed to be a director by deputization of the Issuer.
(2)	Each share is represented by a Restricted Stock Unit ("RSU"). One-third (1/3) of the RSUs will vest on the first, second and third anniversaries of the grant date, subject to Mr. Osnoss continuing to be a director through each such vesting date.
(3)	These securities may be held by Mr. Osnoss for the benefit of one or more Reporting Persons and/or certain of their affiliates or certain of the funds they manage ("Silver Lake"). Mr. Osnoss serves as a director of the Issuer. Pursuant to Silver Lake's policies with respect to director compensation, upon the sale of these securities, the proceeds from such sale may be expected to be remitted to Silver Lake and/or its limited partners. Mr. Osnoss, through his role at Silver Lake, may be deemed to have an indirect interest in the securities reported herein. Pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), this filing shall not be deemed an admission that any of the Reporting Persons is the beneficial owner of all securities covered by this filing, and the Reporting Persons disclaim beneficial ownership of these securities, except to the extent of each of their pecuniary interest therein, if any.
Remarks: The Reporting Persons are jointly filing this Form 4 pursuant to Rule 16a-3(j) under the Exchange Act.  This filing shall not be deemed an admission that any Reporting Person is a beneficial owner of all securities covered by this filing for purposes of Section 16 of the Exchange Act or otherwise, and each Reporting Person disclaims beneficial ownership of these securities, except to the extent of such Reporting Person's pecuniary interest therein, if any.

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