13D Filing: Harbert Discovery Fund, LP and Key Technology Inc (KTEC)

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Exhibit A

AGREEMENT

The undersigned agree that
this Amendment Number 1 to Schedule 13D, dated January 29, 2018, relating to the Common Stock, no par value of Key Technology,
Inc. shall be filed on behalf of the undersigned.

January 29, 2018
(Date)
Harbert Discovery Fund, LP
By:

Harbert Discovery Fund GP, LLC,

its General Partner

By:

Harbert Management Corporation,

its Managing Member

By: /s/ John McCullough

Executive Vice President and

General Counsel

Harbert Discovery Fund GP, LLC
By:

Harbert Management Corporation,

its Managing Member

By: /s/ John McCullough

Executive Vice President and

General Counsel

Harbert Fund Advisors, Inc.
By: /s/ John McCullough

Executive Vice President and

General Counsel

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