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

OMB APPROVAL OMB Number: 3235-0287 Expires: January 31, 2005 Estimated average burden hours per response... 0.5

(Print or Type Responses)

1. Name and Address of Reporting Person * ROBERTS BRYAN E   2. Issuer Name and Ticker or Trading Symbol CASTLIGHT HEALTH, INC. [CSLT] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O VENROCK, 3340 HILLVIEW AVENUE 3. Date of Earliest Transaction (Month/Day/Year) 11/12/2015 (Street) PALO ALTO, CA 94304 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ 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 Class B Common Stock 11/12/2015   P   22,061 A $ 3.85 1,028,061 I By Funds (1) Class B Common Stock 11/13/2015   P   56,242 A $ 3.85 1,084,303 I By Funds (2) Class B Common Stock 11/16/2015   P   51,127 A $ 3.84 1,135,430 I By Funds (3) Class B Common Stock               12,500 D (4)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
	Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.		SEC 1474 (9-02)

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
ROBERTS BRYAN E C/O VENROCK 3340 HILLVIEW AVENUE PALO ALTO, CA 94304	X	X

Signatures

/s/ Bryan E. Roberts		11/16/2015
**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)	Venrock Associates V, L.P. ("VA5") holds an aggregate of 927,654 shares, Venrock Partners V, L.P. ("VP5") holds an aggregate of 78,587 shares and Venrock Entrepreneurs Fund V, L.P. ("VEF5") holds an aggregate of 21,820 shares. Venrock Management V, LLC, VEF Management V, LLC and Venrock Partners Management V, LLC (collectively, the "Venrock GP Entities") are the sole general partners of VA5, VEF5 and VP5 (collectively, the "Funds"), respectively, and may be deemed to beneficially own these shares. Dr. Roberts is a member of the Venrock GP Entities and may be deemed to beneficially own these shares. Dr. Roberts and the Venrock GP Entities expressly disclaim beneficial ownership over these shares except to the extent of their indirect pecuniary interests therein.
(2)	VA5 holds an aggregate of 978,403 shares, VP5 holds an aggregate of 82,886 shares and VEF5 holds an aggregate of 23,014 shares. The Venrock GP Entities are the sole general partners of VA5, VEF5 and VP5, respectively, and may be deemed to beneficially own these shares. Dr. Roberts is a member of the Venrock GP Entities and may be deemed to beneficially own these shares. Dr. Roberts and the Venrock GP Entities expressly disclaim beneficial ownership over these shares except to the extent of their indirect pecuniary interests therein.
(3)	VA5 holds an aggregate of 1,024,499 shares, VP5 holds an aggregate of 86,860 shares and VEF5 holds an aggregate of 24,071 shares. The Venrock GP Entities are the sole general partners of VA5, VEF5 and VP5, respectively, and may be deemed to beneficially own these shares. Dr. Roberts is a member of the Venrock GP Entities and may be deemed to beneficially own these shares. Dr. Roberts and the Venrock GP Entities expressly disclaim beneficial ownership over these shares except to the extent of their indirect pecuniary interests therein.
(4)	The reporting person is a member of VR Management, LLC (the "Management Company"). Under an agreement between the reporting person and the Management Company, the reporting person is deemed to hold the reported shares for the sole benefit of the Management Company and must exercise the reported shares solely upon the direction of the Management Company, which is entitled to the shares. The Management Company may be deemed the indirect beneficial owner of the reported shares, and the reporting person may be deemed the indirect beneficial owner of the reported shares through his interest in the Management Company. The reporting person disclaims beneficial ownership of the reported shares except to the extent of his pecuniary interest therein.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.