13D Filing: Bandera Partners and Rubicon Technology Inc. (RBCN)

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SIGNATURES

After reasonable inquiry
and to the best of his knowledge and belief, the undersigned certifies that the information set forth in this statement is true,
complete and correct.

Dated:  November 17, 2017 Bandera Master Fund L.P.
By: Bandera Partners LLC
its Investment Manager
By: /s/ Jefferson Gramm
Name: Jefferson Gramm
Title: Managing Director
Bandera Partners LLC
By: /s/ Jefferson Gramm
Name: Jefferson Gramm
Title: Managing Director
/s/ Gregory Bylinsky
Gregory Bylinsky
/s/ Jefferson Gramm
Jefferson Gramm
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