AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON AUGUST 9, 2018

REGISTRATION NOS. 333 -122901

811 -21719

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. 961	[X]
AND/OR
REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940	[   ]
AMENDMENT NO. 974	[X]

INVESTMENT MANAGERS SERIES TRUST

(Exact Name of Registrant as Specified in Charter)

235 W. Galena Street

Milwaukee, WI 53212

(Address of Principal Executive Offices, including Zip Code)

Registrant's Telephone Number, Including Area Code: (414) 299-2295

Constance Dye Shannon

UMB Fund Services, Inc.

235 W. Galena Street

Milwaukee, WI 53212

(Name and Address of Agent for Service)

COPIES TO:

Laurie Anne Dee

Morgan, Lewis & Bockius LLP

600 Anton Boulevard, Suite 1800

Costa Mesa, CA 92626

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

[X] immediately upon filing pursuant to paragraph (b) of Rule 485; or

[   ] on __________ pursuant to paragraph (b) of Rule 485; or

[   ] 60 days after filing pursuant to paragraph (a)(1) of Rule 485;

[   ] on __________ pursuant to paragraph (a)(1) of Rule 485; or

[   ] 75 days after filing pursuant to paragraph (a)(2) of Rule 485; or

[   ] on __________ pursuant to paragraph (a)(2) of Rule 485; or

[   ] on __________ pursuant to paragraph (a)(3) 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 registration statement under rule 485(b) under the Securities Act of 1933 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, duly authorized, in the City of Milwaukee and State of Wisconsin, on the 9th day of August, 2018.

INVESTMENT MANAGERS SERIES TRUST
By:	/s/ Maureen Quill
	Maureen Quill, President

Pursuant to the requirements of the Securities Act of 1933, as amended, this Registration Statement has been signed on the 9th day of August, 2018, by the following persons in the capacities set forth below.

Signature	Title
†
Ashley Toomey Rabun	Trustee
†
William H. Young	Trustee
†
Charles H. Miller	Trustee
†
John P. Zader	Trustee
†
Eric M. Banhazl /s/ Maureen Quill	Trustee
Maureen Quill /s/ Rita Dam	President
Rita Dam	Treasurer

† By /s/ Rita Dam

Attorney-in-fact, pursuant to power of attorney previously filed with

Post-Effective Amendment No. 558 on September 30, 2014.

EXHIBIT INDEX

Exhibit	Exhibit No.
XBRL Instance Document	EX-101.INS
XBRL Taxonomy Extension Schema Document	EX-101.SCH
XBRL Taxonomy Extension Calculation Linkbase	EX-101.CAL
XBRL Taxonomy Extension Definition Linkbase	EX-101.DEF
XBRL Taxonomy Extension Labels Linkbase	EX-101.LAB
XBRL Taxonomy Extension Presentation Linkbase	EX-101.PRE