13D Filing: Nierenberg Investment Management and Rosetta Stone Inc (RST)

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SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, each of the undersigned certifies that the information set forth in the Statement is true, complete and correct.
D3 Family Fund, L.P., D3 Family Bulldog Fund, L.P.
By:   Nierenberg Investment Management Company, Inc.
May 17, 2017
Its:   General Partner
By:   /s/ David Nierenberg
             David Nierenberg, President
DIII Offshore Fund, L.P.
By:   Nierenberg Investment Management Offshore, Inc.
May 17, 2017
Its:   General Partner
By:   /s/ David Nierenberg
             David Nierenberg, President
Nierenberg Investment Management
Company, Inc.
May 17, 2017
By:   /s/ David Nierenberg
             David Nierenberg, President
Nierenberg Investment Management
Offshore, Inc.
May 17, 2017
By:   /s/ David Nierenberg
             David Nierenberg, President
May 17, 2017
/s/ David Nierenberg
     David Nierenberg

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