SEC FORM 3

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SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

US VENTURE PARTNERS X LP

(Last)

(First)

(Middle)

2735 SAND HILL ROAD

(Street)

MENLO PARK

94025

(City)

(State)

(Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
03/13/2014

3. Issuer Name and Ticker or Trading Symbol
CASTLIGHT HEALTH, INC. [ CSLT ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

Director	X	10% Owner
Officer (give title below)		Other (specify below)

5. If Amendment, Date of 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

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Class A Common Stock	19,551	D⁽⁴⁾
Class A Common Stock	625	I	Directly owned by AFF X⁽⁴⁾

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
Series A Preferred Stock⁽¹⁾	⁽²⁾	⁽³⁾	Class A Common Stock	130,339	$0	D⁽⁴⁾
Series A1 Preferred Stock⁽¹⁾	⁽²⁾	⁽³⁾	Class A Common Stock	51,223	$0	D⁽⁴⁾
Series C Preferred Stock⁽¹⁾	⁽²⁾	⁽³⁾	Class A Common Stock	1,649,919	$0	D⁽⁴⁾
Series D Preferred Stock⁽¹⁾	⁽²⁾	⁽³⁾	Class A Common Stock	489,752	$0	D⁽⁴⁾
Series A Preferred Stock⁽¹⁾	⁽²⁾	⁽³⁾	Class A Common Stock	4,170	$0	I	Directly owned by AFF X⁽⁴⁾
Series A1 Preferred Stock⁽¹⁾	⁽²⁾	⁽³⁾	Class A Common Stock	1,639	$0	I	Directly owned by AFF X⁽⁴⁾
Series C Preferred Stock⁽¹⁾	⁽²⁾	⁽³⁾	Class A Common Stock	52,784	$0	I	Directly owned by AFF X⁽⁴⁾
Series D Preferred Stock⁽¹⁾	⁽²⁾	⁽³⁾	Class A Common Stock	15,668	$0	I	Directly owned by AFF X⁽⁴⁾

1. Name and Address of Reporting Person^*

US VENTURE PARTNERS X LP

(Last)

(First)

(Middle)

2735 SAND HILL ROAD

(Street)

MENLO PARK

94025

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director	X	10% Owner
Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

USVP X AFFILIATES LP

(Last)

(First)

(Middle)

2735 SAND HILL ROAD

(Street)

MENLO PARK

94025

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director	X	10% Owner
Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

FEDERMAN IRWIN

(Last)

(First)

(Middle)

2735 SAND HILL ROAD

(Street)

MENLO PARK

94025

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director	X	10% Owner
Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

KRAUSZ STEVEN M

(Last)

(First)

(Middle)

2735 SAND HILL ROAD

(Street)

MENLO PARK

94025

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director	X	10% Owner
Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

Lewis Richard W.

(Last)

(First)

(Middle)

2735 SAND HILL ROAD

(Street)

MENLO PARK

94025

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director	X	10% Owner
Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

Matteucci Paul A

(Last)

(First)

(Middle)

2735 SAND HILL ROAD

(Street)

MENLO PARK

94025

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director	X	10% Owner
Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

ROOT JONATHAN D

(Last)

(First)

(Middle)

2735 SAND HILL ROAD

(Street)

MENLO PARK

94025

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director	X	10% Owner
Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

Tansey Casey M

(Last)

(First)

(Middle)

2735 SAND HILL ROAD

(Street)

MENLO PARK

94025

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director	X	10% Owner
Officer (give title below)		Other (specify below)

Explanation of Responses:

1. The Series A, Series A1, Series C and Series D Convertible Preferred Stock will automatically convert into Class A Common Stock on a one-for-one basis immediately prior to the completion of the Issuer's initial public offering.

2. The securities are immediately convertible.

3. The expiration date is not relevant to the conversion of these securities.

4. The reported securities are owned directly by each of U.S. Venture Partners X, L.P. ("USVP X") and USVP X Affiliates Fund, L.P. ("AFF X") and together with USVP X and AFF X, the "USVP X Funds"). Presidio Management Group X, LLC ("PMG X") is the general partner of each of USVP X and AFF X and may be deemed to have sole voting and dispositive power over the shares held by the USVP X Funds. PMG X and each of Irwin Federman, Steven M. Krausz, Richard W. Lewis, Paul A Matteucci, Jonathan D. Root and Casey M. Tansey, the managing members of PMG X, may be deemed to share voting and dispositive power over the reported shares. Such persons and entities disclaim beneficial ownership of shares held by the USVP X Funds, except to the extent of any proportionate pecuniary interest therein.

Remarks:

	Michael P. Maher	03/13/2014
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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 Number.