13D Filing: Discovery Group I, LLC and Planet Payment Inc (PLPM)

The transactions in Common Stock effected
by the Reporting Persons during the past 60 days are set out in Exhibit 1 hereto.

No person other than Discovery
Equity Partners is known to any Reporting Person to have the right to receive or the power to direct the receipt of dividends
from, or the proceeds from the sale of, any of the shares of Common Stock reported herein.

Item 6 of the Schedule 13D is hereby amended
to read in its entirety as follows:

There
are no contracts, arrangements, understandings or relationships (legal or otherwise) between or among any of the Reporting Persons
and any other person with respect to any securities of the Company other than the governing documents of Discovery Group and Discovery
Equity Partners, the margin loan facilities referred to under Item 3 above, the Joint Filing Agreement of the Reporting Persons
with respect to the Schedule 13D that was included as an exhibit thereto, the Joint Filing Agreement of the Reporting Persons with
respect to this Amendment No. 1 included as Exhibit 2 to this Amendment No. 1, and the Power of Attorney granted by
Michael R. Murphy with respect to reports under Section 13 of the Securities Exchange Act of 1934, as amended, which Power of Attorney
is included as Exhibit 3 to this Amendment No. 1.