Exhibit 99.(a)(8)

Creation and Designation of 

Additional Series of Shares of Beneficial Interest of 

American Beacon Funds 

Pursuant to Article III, Section 1 of the Amended and Restated Declaration of Trust of the American Beacon Funds (the “Trust”) dated March 4, 2015 (“Trust Instrument”), the American Beacon ARK Disruptive Innovation Fund (the “Fund”), a new series of the Trust, was created by resolution of the Trust’s Board of Trustees (“Board”) on November 3, 2016. 

The Fund and the Fund’s shares of beneficial interest (“Shares”) are designated as follows: 

1. The initial classes of Shares of the Fund are designated as Institutional Class Shares, Investor Class Shares and Y Class Shares. Each class of Shares has the same rights and obligations, except as provided in the Trust Instrument, the Fund’s Registration Statement on Form N-1A (“Registration Statement”) or by resolution adopted by the Board. The Fund’s Shares shall be offered for sale and redeemed on the terms set forth in the Trust’s Registration Statement.

2. All rights and preferences of the Fund and the Shares are as set forth in the Trust Instrument and the Amended and Restated Bylaws of the Trust dated March 4, 2015.

IN WITNESS WHEREOF, the undersigned have executed this instrument the 3rd day of November, 2016.

/s/ Gilbert G. Alvarado

Gilbert G. Alvarado

/s/ Joseph B. Armes

Joseph B. Armes

/s/ Gerald J. Arpey

Gerald J. Arpey

/s/ Brenda A. Cline

Brenda A. Cline

/s/ Eugene J. Duffy

Eugene J. Duffy

/s/ Thomas M. Dunning

Thomas M. Dunning

/s/ Alan D. Feld

Alan D. Feld

/s/ Richard A. Massman

Richard A. Massman

/s/ Barbara J. McKenna

Barbara J. McKenna

/s/ R. Gerald Turner

R. Gerald Turner

2

THE COMMONWEALTH OF MASSACHUSETTS

I hereby certify that, upon examination of this document, duly submitted to me, it appears that the provisions of the General Laws relative to corporations have been complied with, and I hereby approve said articles; and the filing fee having been paid, said articles are deemed to have been filed with me on:

November 04, 2016 07:11 PM 

/s/ WILLIAM FRANCIS GALVIN

WILLIAM FRANCIS GALVIN

Secretary of the Commonwealth