SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G/A

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT

TO RULE 13d-1(b), (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO

RULE 13d-2

(Amendment No. 4)*

Castlight Health, Inc.

(Name of Issuer)

Class B Common Stock, $0.0001 par value per share

(Title of Class of Securities)

14862Q100

(CUSIP Number)

November 15, 2021

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

☐

Rule 13d-1(b)

☐

Rule 13d-1(c)

☒

Rule 13d-1(d)

*	The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).


CUSIP No. 14862Q100		13G		Page 2 of 5 Pages

Page 2 of 5 Pages


CUSIP No. 14862Q100		13G		Page 3 of 5 Pages

Schedule 13G

Item 1(a).

Name of Issuer: Castlight Health, Inc.

Item 1(b).

Address of Issuer’s Principal Executive Offices: 150 Spear Street, Suite 400, San Francisco, California 94105

Item 2(a).

Name of Persons Filing: The Wellcome Trust Limited as trustee of the Wellcome Trust

Item 2(b).

Address of Principal Business Office or, if None, Residence: 215 Euston Road, London NW1 2BE, United Kingdom

Item 2(c).

Citizenship: United Kingdom

Item 2(d).

Title of Class of Securities: Class B Common Stock, $0.0001 par value per share

Item 2(e).

CUSIP Number: 14862Q100

Item 3.

If this statement is filed pursuant to Rule 13d-1(b), or 13d-2(b) or (c), Check Whether the Person Filing is a:


(a)	[ ]	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o).

(b)	[ ]	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).

(c)	[ ]	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c).

(d)	[ ]	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C 80a-8).

(e)	[ ]	An investment adviser in accordance with §240.13d-1(b)(1)(ii)(E);

(f)	[ ]	An employee benefit plan or endowment fund in accordance with §240.13d-1(b)(1)(ii)(F);

(g)	[ ]	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);

(h)	[ ]	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);

(i)	[ ]	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);

(j)	[ ]	Group, in accordance with §240.13d-1(b)(1)(ii)(J).

Page 3 of 5 Pages


CUSIP No. 14862Q100		13G		Page 4 of 5 Pages

Item 4.

Ownership.

The information in items 1 and 5 through 11 on the cover page (p. 2) of this Schedule 13G is hereby incorporated by reference.

Item 5.

Ownership of Five Percent or Less of a Class.

If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than 5 percent of the class of securities, check the following [X].

Item 6.

Ownership of More than Five Percent on Behalf of Another Person.

Not applicable.

Item 7.

Identification and Classification of the Subsidiary which Acquired the Security Being Reported on By the Parent Holding Company or Control Person.

Not applicable.

Item 8.

Identification and Classification of Members of the Group.

Not applicable.

Item 9.

Notice of Dissolution of Group.

Not applicable.

Item 10.

Certification.

Not applicable.

Page 4 of 5 Pages


CUSIP No. 14862Q100		13G		Page 5 of 5 Pages

SIGNATURES

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.


Dated: November 15, 2021	The Wellcome Trust Limited
	as trustee of the Wellcome Trust

	/s/ Nick Moakes
	Name:	Nick Moakes
	Title:	Chief Investment Officer

Page 5 of 5 Pages

NAMES OF REPORTING PERSONS

   I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

  The Wellcome Trust Limited as trustee of the Wellcome Trust

CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

(a) ☐ (b) ☐

SEC USE ONLY

CITIZENSHIP OR PLACE OF ORGANIZATION

United Kingdom

CASTLIGHT HEALTH, INC. SC 13G/A