As filed with the Securities and Exchange Commission on May 14, 2018

1933 Act Registration No. 002-84012

1940 Act Registration No. 811-03752

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. 119	☒

REGISTRATION STATEMENT

UNDER

THE INVESTMENT COMPANY ACT OF 1940	☒
Amendment No. 120	☒

AMG FUNDS III

(Exact name of registrant as specified in charter)

600 Steamboat Road, Suite 300

Greenwich, Connecticut 06830

(Address of principal executive offices)

Registrant’s telephone number, including area code: (800) 835-3879

Gregory C. Davis

Ropes & Gray LLP

Three Embarcadero Center

San Francisco, CA 94111-4006

(Name and address of agent for service)

It is proposed that this filing will become effective:

☒ immediately upon filing pursuant to paragraph (b)

☐ on (date) pursuant to paragraph (b)

☐ 60 days after filing pursuant to paragraph (a)

☐ on (date) pursuant to paragraph (a)

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

☐ on (date) pursuant to (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.

The Amendment relates solely to AMG Managers Special Equity Fund, AMG Managers Global Income Opportunity Fund and AMG Managers Loomis Sayles Bond Fund, each a series of AMG Funds III.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, each as amended, AMG Funds III certifies that it meets all of the requirements for effectiveness of this registration statement under Rule 485(b) under the Securities Act of 1933, as amended, and has duly caused this amendment to the registration statement to be signed on its behalf by the undersigned, duly authorized, in the Town of Greenwich, and State of Connecticut, on the 14th day of May, 2018.

AMG FUNDS III
By:	/s/ Thomas Disbrow
	Thomas Disbrow
	Treasurer, Chief Financial Officer, and Principal Financial Officer

Pursuant to the requirements of the Securities Act, this amendment to the registration statement has been signed below by the following persons in the capacities and on the date indicated:

Signature	Title	Date
/s/ Bruce B. Bingham*	Trustee	May 14, 2018
Bruce B. Bingham
/s/ Christine C. Carsman*	Trustee	May 14, 2018
Christine C. Carsman
/s/ Edward J. Kaier*	Trustee	May 14, 2018
Edward J. Kaier
/s/ Kurt A. Keilhacker*	Trustee	May 14, 2018
Kurt A. Keilhacker
/s/ Steven J. Paggioli*	Trustee	May 14, 2018
Steven J. Paggioli
/s/ Richard F. Powers III*	Trustee	May 14, 2018
Richard F. Powers III
/s/ Eric Rakowski*	Trustee	May 14, 2018
Eric Rakowski
/s/ Victoria L. Sassine*	Trustee	May 14, 2018
Victoria L. Sassine
/s/ Thomas R. Schneeweis*	Trustee	May 14, 2018
Thomas R. Schneeweis
/s/ Keitha L. Kinne	President and	May 14, 2018
Keitha L. Kinne	Principal Executive Officer
	(Principal Executive Officer)
/s/ Thomas Disbrow	Treasurer,	May 14, 2018
Thomas Disbrow	Chief Financial Officer, and
	Principal Financial Officer
	(Principal Accounting Officer)
	(Principal Financial Officer)

*By:	/s/ Thomas Disbrow
	Thomas Disbrow

Pursuant to Powers of Attorney incorporated herein by reference to Post-Effective Amendment No. 118 to the Registrant’s Registration Statement on Form N-1A, Registration Nos. 002-84012 and 811-03752 (filed April 30, 2018).

Date: May 14, 2018

AMG FUNDS III

EXHIBIT INDEX

Exhibit No.	Description
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