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Explanation of Responses:
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1)
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On May 26, 2016, Bessemer Venture Partners VI L.P. ("BVP VI"), Bessemer Venture Partners Co-Investment L.P. ("BVP Co") and Bessemer Venture Partners VI Institutional L.P. ("BVP VI Inst" and, collectively with BVP VI and BVP VI Co, the "Funds") sold 150,046, 48,403 and 1,551 shares of common stock, respectively, at an average sale price of $12.98860 (the "May 26 Fund Sales"). The Reporting Person hereby undertakes, upon request of the Staff of the U.S. Securities and Exchange Commission, the Issuer or a security holder of the Issuer, to provide full information regarding such execution.
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After the May 26 Fund Sales, BVP VI, BVP Co, and BVP VI Inst owned 6,108,523, 1,993,601, and 73,898 shares, respectively.
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Represents 49,361 shares held personally, 153,413 shares held by the Cowan Family Trust UDT dated 10-17-02 (the "Cowan Family Trust") and 389,303 shares held by David Cowan Partners II, a DE Multiple Series Limited Partnership (Series A) ("Cowan Partners"). Mr. Cowan and his spouse are the trustees of the Cowan Family Trust and the general partners of Cowan Partners. Mr. Cowan disclaims beneficial ownership of the securities held by the Cowan Family Trust and Cowan Partners and this report shall not be deemed an admission that he is the beneficial owner of such securities, except to the extent of his pecuniary interest, if any, therein.
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Mr. Cowan is an executive manager and a member of Deer VI & Co. LLC ("Deer VI"), the general partner of each of the Funds (as defined above). Mr. Cowan disclaims beneficial ownership of the securities held by the Funds, and this report shall not be deemed an admission that such reporting person is the beneficial owner of such securities, except to the extent of his pecuniary interest, if any, in the securities by virtue of his interest in Deer VI and his indirect limited partnership interest in BVP Co.
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On May 27, 2016, BVP VI, BVP Co, and BVP VI Inst sold 375,115, 121,007 and 3,878 shares of common stock, respectively, at an average sale price of $13.0470 (the "May 27 Fund Sales"). The Reporting Person hereby undertakes, upon request of the Staff of the U.S. Securities and Exchange Commission, the Issuer or a security holder of the Issuer, to provide full information regarding such execution.
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After the May 27 Fund Sales, BVP VI, BVP Co, and BVP VI Inst owned 5,733,408, 1,872,594, and 70,020 shares, respectively.
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On May 31, 2016, BVP VI, BVP Co, and BVP VI Inst sold 486,777, 157,028 and 5,032 shares of common stock, respectively, at an average sale price of $13.0441 (the "May 31 Fund Sales"). The Reporting Person hereby undertakes, upon request of the Staff of the U.S. Securities and Exchange Commission, the Issuer or a security holder of the Issuer, to provide full information regarding such execution.
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After the May 31 Fund Sales, BVP VI, BVP Co, and BVP VI Inst owned 5,246,631, 1,715,566, and 64,988 shares, respectively.
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