X0306 4 2017-11-13 0 0001560327 Rapid7, Inc. RPD 0001309469 BAIN CAPITAL VENTURE INVESTORS, LLC 200 CLARENDON STREET BOSTON MA 02116 0 0 1 0 0001408678 Bain Capital Venture Partners 2007, L.P. 200 CLARENDON STREET BOSTON MA 02116 0 0 1 0 0001408677 Bain Capital Venture Fund 2007, L.P. 200 CLARENDON STREET BOSTON MA 02116 0 0 1 0 0001408649 BCIP Venture Associates 200 CLARENDON STREET BOSTON MA 02116 0 0 1 0 0001408676 BCIP VENTURE ASSOCIATES-B 200 CLARENDON STREET BOSTON MA 02116 0 0 1 0 0001212150 KRUPKA MICHAEL A C/O BAIN CAPITAL VENTURE INVESTORS, LLC 200 CLARENDON STREET BOSTON MA 02116 0 0 1 0 0001708763 Agarwal Ajay C/O BAIN CAPITAL VENTURE INVESTORS, LLC 200 CLARENDON STREET BOSTON MA 02116 0 0 1 0 Common Stock 2017-11-13 4 S 0 898517 18.30 D 6682713 I See footnotes Bain Capital Venture Investors, LLC ("BCVI") is the general partner of Bain Capital Venture Partners 2007, L.P. ("Partners 2007"), which is the general partner of Bain Capital Venture Fund 2007, L.P. ("Fund 2007"). As a result, Partners 2007 may be deemed to share voting and dispositive power with respect to shares of Common Stock held by Fund 2007. Partners 2007 disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein. On November 13, 2017, Fund 2007 sold 785,414 shares of Common Stock. Following such sale Fund 2007 held 5,841,509 shares of Common Stock. On November 13, 2017, BCIP Venture Associates ("BCIP VA"), whose managing partner is Boylston Coinvestors, LLC ("Boylston"), sold 111,707 shares of Common Stock. Following such sale BCIP VA held 830,820 shares of Common Stock. On November 13, 2017, BCIP Venture Associates-B ("BCIP VA-B" and together with Fund 2007, and BCIP VA, the "Bain Capital Entities"), whose managing partner is Boylston, sold 1,396 shares of Common Stock. Following such sale BCIP VA-B held 10,384 shares of Common Stock. The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Entities is directed by the Executive Committee of BCVI, which consists of Michael A. Krupka, and Ajay Agarwal. As a result, BCVI may be deemed to share voting and dispositive power with respect to all of the shares of Common Stock held by the Bain Capital Entities. BCVI disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein. BAIN CAPITAL VENTURE INVESTORS, LLC, By: /s/ Michael A. Krupka, Name: Michael A. Krupka, Title: Managing Director 2017-11-15 BAIN CAPITAL VENTURE PARTNERS 2007, L.P., BY: Bain Capital Venture Investors, LLC, its general partner, By: /s/ Michael A. Krupka, Name: Michael A. Krupka, Title: Managing Director 2017-11-15 BAIN CAPITAL VENTURE FUND 2007, L.P., BY: Bain Capital Venture Partners 2007, L.P., its general partner, BY: Bain Capital Venture Investors, LLC, its general partner, By: /s/ Michael A. Krupka, Name: Michael A. Krupka, Title: Managing Director 2017-11-15 BCIP VENTURE ASSOCIATES, BY: Boylston Coinvestors, LLC, its managing partner, By: /s/ Michael A. Krupka, Name: Michael A. Krupka, Title: Authorized Signatory 2017-11-15 BCIP VENTURE ASSOCIATES-B, BY: Boylston Coinvestors, LLC, its managing partner, By: /s/ Michael A. Krupka, Name: Michael A. Krupka, Title: Authorized Signatory 2017-11-15 By: /s/ Michael A. Krupka 2017-11-15 By: /s/ Ajay Agarwal 2017-11-15