UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933
(No. 333-208542)	[X]
Pre-Effective Amendment No.	[   ]
Post-Effective Amendment No. 6	[X]
and/or
REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT
OF 1940 (No. 811-23121)	[X]
Amendment No.  7	[X]

(Check appropriate box or boxes.)

CLAYTON STREET TRUST

(Exact Name of Registrant as Specified in Charter)

151 Detroit Street, Denver, Colorado 80206-4805

(Address of Principal Executive Offices) (Zip Code)

Registrant’s Telephone Number, including Area Code: 303-333-3863

Kathryn Santoro – 151 Detroit Street, Denver, Colorado 80206-4805

(Name and Address of Agent for Service)

Approximate Date of Proposed Public Offering: As soon as practicable after the effective date of this Registration Statement and thereafter from day to day.

It is proposed that this filing will become effective (check appropriate box):

[X] immediately upon filing pursuant to paragraph (b)

[   ] on (date) pursuant to paragraph (b)

[   ] 60 days after filing pursuant to paragraph (a)(1)

[   ] on (date) pursuant to paragraph (a)(1)

[   ] 75 days after filing pursuant to paragraph (a)(2)

[   ] on (date) pursuant to paragraph (a)(2) of Rule 485.

If appropriate, check the following box:

[   ] This post-effective amendment designates a new effective date for a previously filed post-effective amendment.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended, and the Investment Company Act of 1940, as amended, the Registrant certifies that it meets all of the requirements for effectiveness of this Amendment to its Registration Statement pursuant to Rule 485(b) under the Securities Act of 1933, as amended, and has duly caused this Amendment to its Registration Statement to be signed on its behalf by the undersigned, thereto duly authorized, in the City of Denver, and State of Colorado, on the 18^th day of May, 2018.

CLAYTON STREET TRUST
By:	/s/ Bruce L. Koepfgen
	Bruce L. Koepfgen, President and
	Chief Executive Officer

Pursuant to the requirements of the Securities Act of 1933, as amended, this Amendment to the Registration Statement has been signed below by the following person(s) in the capacities and on the dates indicated.

Signature	Title	Date
/s/ Bruce L. Koepfgen Bruce L. Koepfgen	President and Chief Executive Officer (Principal Executive Officer)	May 18, 2018
/s/ Jesper Nergaard Jesper Nergaard	Vice President, Chief Financial Officer, Treasurer and Principal Accounting Officer (Principal Financial Officer and Principal Accounting Officer)	May 18, 2018

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Signature	Title	Date
Clifford J. Weber* Clifford J. Weber	Chairman and Trustee	May 18, 2018
Maureen T. Upton* Maureen T. Upton	Trustee	May 18, 2018
Jeffrey B. Weeden* Jeffrey B. Weeden	Trustee	May 18, 2018
Michael Drew Elder* Michael Drew Elder	Trustee	May 18, 2018

/s/ Kathryn Santoro          

*By: Kathryn Santoro

Attorney-in-Fact

Pursuant to Powers of Attorney, dated February 28, 2018, incorporated by reference to Exhibit (q)(1) to Post-Effective Amendment No. 4, filed on February 28, 2018.

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INDEX OF EXHIBITS

Exhibit Number	Exhibit Title
EX-101.INS	XBRL Instance Document
EX-101.SCH	XBRL Taxonomy Extension Schema Document
EX-101.CAL	XBRL Taxonomy Extension Calculation Linkbase
EX-101.DEF	XBRL Taxonomy Extension Definition Linkbase
EX-101.LAB	XBRL Taxonomy Extension Labels Linkbase
EX-101.PRE	XBRL Taxonomy Extension Presentation Linkbase

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