Filed with the Securities and Exchange Commission on December 8, 2017

1933 Act Registration File No. 333-17391

1940 Act File No. 811-07959

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C.  20549

FORM N‑1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933	☒
Pre‑Effective Amendment No.	☐
Post‑Effective Amendment No. 804	☒
and
REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940	☒
Amendment No. 806	☒

(Check appropriate box or boxes.)

ADVISORS SERIES TRUST

(Exact Name of Registrant as Specified in Charter)

615 East Michigan Street

Milwaukee, Wisconsin  53202

(Address of Principal Executive Offices) (Zip Code)

(Registrant’s Telephone Numbers, Including Area Code) (414) 765-6609

Douglas G. Hess, President

Advisors Series Trust

c/o U.S. Bancorp Fund Services, LLC

777 East Wisconsin Avenue, 5^th Floor

Milwaukee, Wisconsin 53202

(Name and Address of Agent for Service)

Copies to:

Domenick Pugliese, Esq.

Schiff Hardin LLP

666 Fifth Avenue, Suite 1700

New York, New York 10103

It is proposed that this filing will become effective

ý	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.

Explanatory Note: This Post-Effective Amendment (“PEA”) No. 804 to the Advisors Series Trust’s (the “Trust”) Registration Statement on Form N-1A hereby incorporates Parts A, B and C from the Trust’s PEA No. 803 on Form N-1A filed November 22, 2017.  This PEA No. 804 is filed for the sole purpose of submitting the XBRL exhibits for the risk/return summary first provided in PEA No. 803 to the Trust’s Registration Statement for its series: O’Shaughnessy All Cap Core Fund, O’Shaughnessy Enhanced Dividend Fund, O’Shaughnessy Small/Mid Cap Growth Fund, O’Shaughnessy Market Leaders Value Fund and O’Shaughnessy Small Cap Value Fund.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended (the “Securities Act”) and the Investment Company Act of 1940, as amended, the Registrant certifies that this Post-Effective Amendment No. 804 meets all of the requirements for effectiveness under Rule 485(b) and the Registrant has duly caused this Post-Effective Amendment No. 804 to its Registration Statement on Form N-1A to be signed on its behalf by the undersigned, duly authorized, in the City of Milwaukee and State of Wisconsin, on the 8^th day of December, 2017.

Advisors Series Trust

By:  /s/ Douglas G. Hess

Douglas G. Hess

President

Pursuant to the requirements of the Securities Act, this Post-Effective Amendment No. 804 to its Registration Statement has been signed below by the following persons in the capacities and on the dates indicated.

Signature	Title	Date
Gail S. Duree*	Trustee	December 8, 2017
Gail S. Duree
David G. Mertens*	Trustee	December 8, 2017
David G. Mertens
George Rebhan*	Trustee	December 8, 2017
George Rebhan
Raymond B. Woolson*	Trustee	December 8, 2017
Raymond B. Woolson
Joe D. Redwine*	Trustee	December 8, 2017
Joe D. Redwine
/s/ Cheryl L. King	Treasurer and Principal	December 8, 2017
Cheryl L. King	Financial Officer
/s/ Douglas G. Hess	President, Chief Executive	December 8, 2017
Douglas G. Hess	Officer and Principal
	Executive Officer
*By:  /s/ Douglas G. Hess		December 8, 2017
Douglas G. Hess Attorney-In Fact pursuant to Power of Attorney

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EXHIBIT LIST

Exhibit	Exhibit No.
Instance Document	EX-101.INS
Schema Document	EX-101.SCH
Calculation Linkbase Document	EX-101.CAL
Definition Linkbase Document	EX-101.DEF
Label Linkbase Document	EX-101.LAB
Presentation Linkbase Document	EX-101.PRE

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