OAK INVESTMENT PARTNERS XII L P - 3 filing on 2014-03-13

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

OMB APPROVAL

OMB Number:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

OAK INVESTMENT PARTNERS XII L P

(Last)

(First)

(Middle)

901 MAIN AVENUE, SUITE 600

(Street)

NORWALK

06851

(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)

X	Form filed by One Reporting Person
	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)

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)
Class A Common Stock	⁽¹⁾⁽²⁾	⁽¹⁾⁽²⁾	Class B Common Stock⁽²⁾	122,232	0⁽¹⁾⁽²⁾	D⁽⁴⁾
Series A Convertible Preferred Stock	⁽³⁾	⁽³⁾	Class A Common Stock⁽¹⁾⁽²⁾	814,884	0⁽³⁾	D⁽⁴⁾
Series A-1 Convertible Preferred Stock	⁽³⁾	⁽³⁾	Class A Common Stock⁽¹⁾⁽²⁾	653,582	0⁽³⁾	D⁽⁴⁾
Series B Convertible Preferred Stock	⁽³⁾	⁽³⁾	Class A Common Stock⁽¹⁾⁽²⁾	8,522,522	0⁽³⁾	D⁽⁴⁾
Series C Convertible Preferred Stock	⁽³⁾	⁽³⁾	Class A Common Stock⁽¹⁾⁽²⁾	1,459,460	0⁽³⁾	D⁽⁴⁾
Series D Convertible Preferred Stock	⁽³⁾	⁽³⁾	Class A Common Stock⁽¹⁾⁽²⁾	345,064	0⁽³⁾	D⁽⁴⁾

Explanation of Responses:

1. Each share of Class A Common Stock is convertible, at any time at the option of the holder, into one (1) share of Class B Common Stock. In addition, pursuant to the Issuer's Restated Certificate of Incorporation (the "Post-Effective Certificate") that will be effective upon the consummation of the Issuer's initial public offering of its Class B Common Stock (the "IPO"), each share of Class A Common Stock will convert automatically into one (1) share of Class B Common Stock upon any transfer, whether or not for value, that occurs after the closing of the IPO to any transferee who is not a "Permitted Transferee", as defined in the Post-Effective Certificate. The shares of Class A Common Stock have no expiration date.

2. Pursuant to the Post-Effective Certificate, each share of the Issuer's Class A Common Stock will convert automatically into one (1) share of Class B Common Stock upon the earliest to occur of the following: (a) the first date on which the number of shares of Class A Common Stock then outstanding falls below twenty percent of the number of shares of Class A common stock outstanding as of the closing of the IPO, (b) the ten year anniversary of the closing of the IPO, or (c) a time and date approved in writing by holders of at least a majority of the then-outstanding shares of Class A Common Stock. The shares of Class A Common Stock and Class B Common Stock have no expiration date.

3. Each share of Convertible Preferred Stock will be automatically converted into one (1) share of Class A Common Stock immediately prior to the consummation of the IPO, and has no expiration date.

4. Represents securities directly owned by Oak Investment Partners XII, L.P and indirectly by Oak Associates XII, LLC, the sole general partner of Oak Investment Partners XII, L.P., and the Managing Members of Oak Associates XII, LLC. The "Managing Members" of Oak Associates XII, LLC are Ann H. Lamont, Bandel L. Carano, Edward F. Glassmeyer, Fredric W. Harman, Iftikar A. Ahmed, Grace A. Ames, Gerald R. Gallagher and Warren B. Riley. Such Managing Members have shared voting and investment control over all of the shares held by Oak Investment Partners XII, L.P.

Remarks:

	/s/ Ann H. Lamont, Managing Member of Oak Associates XII, LLC, its General Partner	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.