As filed with the Securities and Exchange Commission on February 15, 2013

Securities Act Registration No. 33-10451

Investment Company Act Registration No. 811-4920

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-1A

    REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933                                 X

Post-Effective Amendment No. 73                      X

and/or

    REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940         X

Amendment No. 75                        X

(Check appropriate box or boxes)

WASATCH FUNDS TRUST

(Exact Name of Registrant as Specified in Charter)

150 Social Hall Avenue

4th Floor

Salt Lake City, Utah 84111

(Address of Principal Executive Offices)

Registrant’s Telephone Number, including Area Code: (801) 533-0777

(Name and Address of Agent for Service)	Copy to:
Samuel S. Stewart, Jr. Wasatch Advisors, Inc. 150 Social Hall Avenue, 4th Floor Salt Lake City, Utah 84111	Eric F. Fess Chapman and Cutler LLP 111 West Monroe Street Chicago, IL 60603

    Approximate Date of Proposed Public Offering: As soon as practicable following effectiveness.

It is proposed that this filing will become effective:

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

(  ) on             pursuant to paragraph (b)

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

(  ) on             pursuant to paragraph (a)(1)

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

(  ) on             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 this Post-Effective Amendment No. 73 to the Registration Statement meets all the requirements for effectiveness pursuant to Rule 485(b) of the Securities Act of 1933, as amended, and the Registrant has duly caused this Post-Effective Amendment No. 73 under the Securities Act of 1933, as amended and Post-Effective Amendment No. 75 under the Investment Company Act of 1940, as amended to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Salt Lake City, and the State of Utah on the 15^th day of February 2013.

WASATCH FUNDS TRUST

By         /s/ Samuel S. Stewart, Jr.

             Samuel S. Stewart, Jr., Ph.D.,

             President

Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed below by the following persons in the capacities and on the date indicated.

Signature	Title	Date
/s/ Samuel S. Stewart, Jr. Samuel S. Stewart, Jr., Ph.D.	President and Trustee (principal executive officer)	February 15, 2013
/s/ Cindy B. Firestone Cindy B. Firestone	Treasurer   (principal financial and accounting officer)	February 15, 2013
James U. Jensen* James U. Jensen, Esquire	Trustee	February 15, 2013
William R. Swinyard* William R. Swinyard	Trustee	February 15, 2013
D. James Croft* D. James Croft	Trustee	February 15, 2013
Miriam M. Allison* Miriam M. Allison	Trustee	February 15, 2013
Heikki Rinne* Heikki Rinne	Trustee	February 15, 2013

/s/ Russell L. Biles

Russell L. Biles

*Attorney-in-Fact

February 15, 2013

*Signed pursuant to powers of attorney are incorporated herein by reference to Exhibit (q) in Post-Effective Amendment No. 50 to the Registrant’s Registration Statement on Form N-1A filed with the Commission on March 31, 2010 and a power of attorney incorporated herein by reference to Exhibit q-1 in Post-Effective Amendment No. 65 to the Registrant’s Registration Statement on Form N-1A filed with the Commission on October 2, 2012.

Exhibit Index

Exhibit No.
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