Ownership Submission
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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(Print or Type Responses)
1. Name and Address of Reporting Person *
Chaloemtiarana Jennifer
   2. Issuer Name and Ticker or Trading Symbol
CASTLIGHT HEALTH, INC. [CSLT] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
General Counsel
(Last)
(First)
(Middle)
C/O CASTLIGHT HEALTH, INC., TWO RINCON CTR, 121 SPEAR STREET, STE. 3		 3. Date of Earliest Transaction (Month/Day/Year)
02/24/2016
(Street)

SAN FRANCISCO, CA 94105		 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

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
Employee Stock Option (right to buy) $ 11.93 02/24/2016   D     225,000   (1) 10/14/2024 Common Stock 225,000 (2) 0 D  
Employee Stock Option (right to buy) $ 2.99 02/24/2016   A   225,000     (3) 02/23/2026 Common Stock 225,000 (2) 225,000 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Chaloemtiarana Jennifer
C/O CASTLIGHT HEALTH, INC.
TWO RINCON CTR, 121 SPEAR STREET, STE. 3
SAN FRANCISCO, CA 94105		       General Counsel  

Signatures

 /s/ Jennifer Chaloemtiarana   02/26/2016
**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) The option provided for vesting of 20% of the shares on September 2, 2015, then in twelve installments each consisting of 1.667% of the shares after the completion of each additional consecutive month of service, and with respect to the remaining shares, in 24 equal installments upon the completion of each additional consecutive month of service thereafter.
(2) On February 24, 2016, the Issuer canceled, pursuant to the Issuer's option exchange program, an option for 225,000 shares of the Issuer's stock granted to the Reporting Person on October 15, 2014. In exchange, the Reporting Person received a replacement option, for 225,000 shares, having an exercise price of $2.99 a share.
(3) The option will vest over five years in 60 equal monthly installments beginning on March 24, 2016.

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