BAIN CAPITAL VENTURE INVESTORS, LLC

Row 1 · 2017-12-11 · Conversion · Acquired 394,273 · Balance 394,273

F1: The shares of preferred stock automatically converted into common stock immediately prior to the closing of the Issuer's initial public offering using a calculation defined in the Issuer's Restated Certificate of Incorporation, as amended, based on the initial purchase price and the conversion rate in effect at the time of conversion. The shares of preferred stock automatically converted on a 1-for-3.214 basis and such conversion rate is reflected in the amount of common stock underlying the security.

F2: Bain Capital Venture Investors, LLC ("BCVI") is the general partner of Bain Capital Venture Partners 2005, L.P. ("BCVP"), which is the general partner of Bain Capital Venture Fund 2005, L.P. ("Fund 2005"). As a result, BCVP may be deemed to share voting and dispositive power with respect to the securities held by Fund 2005. BCVP disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein. Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 1,106,387 shares of the Issuer's Series A-1 Preferred Stock, 2,904,268 shares of the Issuer's Series A-2 Preferred Stock, 1,325,258 shares of the Issuer's Series B Preferred Stock, 304,948 shares of the Issuer's Series C Preferred Stock and 353,283 shares of the Issuer's Series D Preferred Stock held by Fund 2005 automatically converted into 344,239, 903,630, 412,339, 94,881 and 109,921 shares of the Issuer's common stock, respectively.

F3: Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 157,639 shares of the Issuer's Series A-1 Preferred Stock, 413,802 shares of the Issuer's Series A-2 Preferred Stock, 188,823 shares of the Issuer's Series B Preferred Stock, 43,449 shares of the Issuer's Series C Preferred Stock and 50,336 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III, LLC ("BCIP III"), whose manager is BCIP Associates III ("BCIPA III"), whose managing partner is Boylston Coinvestors, LLC ("Boylston"), automatically converted into 49,047, 128,749, 58,750, 13,518 and 15,663 shares of the Issuer's common stock, respectively. BCIPA III may be deemed to share voting and dispositive power with respect to the securities held by BCIP III. BCIPA III disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F4: Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 3,174 shares of the Issuer's Series A-1 Preferred Stock, 8,331 shares of the Issuer's Series A-2 Preferred Stock, 3,799 shares of the Issuer's Series B Preferred Stock, 874 shares of the Issuer's Series C Preferred Stock and 1,013 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III-B, LLC ("BCIP III-B" and together with Fund 2005 and BCIP III, the "Bain Capital Entities"), whose manager is BCIP Associates III-B ("BCIPA III-B"), whose managing partner is Boylston, automatically converted into 987, 2,592, 1,182, 271 and 316 shares of the Issuer's common stock, respectively. BCIPA III-B may be deemed to share voting and dispositive power with respect to the securities held by BCIP III-B. BCIPA III-B disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F5: 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 and Messrs. Krupka and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Entities. BCVI and Messrs. Krupka and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.

Row 2 · 2017-12-11 · Conversion · Acquired 1,034,971 · Balance 1,429,244

F1: The shares of preferred stock automatically converted into common stock immediately prior to the closing of the Issuer's initial public offering using a calculation defined in the Issuer's Restated Certificate of Incorporation, as amended, based on the initial purchase price and the conversion rate in effect at the time of conversion. The shares of preferred stock automatically converted on a 1-for-3.214 basis and such conversion rate is reflected in the amount of common stock underlying the security.

F2: Bain Capital Venture Investors, LLC ("BCVI") is the general partner of Bain Capital Venture Partners 2005, L.P. ("BCVP"), which is the general partner of Bain Capital Venture Fund 2005, L.P. ("Fund 2005"). As a result, BCVP may be deemed to share voting and dispositive power with respect to the securities held by Fund 2005. BCVP disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein. Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 1,106,387 shares of the Issuer's Series A-1 Preferred Stock, 2,904,268 shares of the Issuer's Series A-2 Preferred Stock, 1,325,258 shares of the Issuer's Series B Preferred Stock, 304,948 shares of the Issuer's Series C Preferred Stock and 353,283 shares of the Issuer's Series D Preferred Stock held by Fund 2005 automatically converted into 344,239, 903,630, 412,339, 94,881 and 109,921 shares of the Issuer's common stock, respectively.

F3: Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 157,639 shares of the Issuer's Series A-1 Preferred Stock, 413,802 shares of the Issuer's Series A-2 Preferred Stock, 188,823 shares of the Issuer's Series B Preferred Stock, 43,449 shares of the Issuer's Series C Preferred Stock and 50,336 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III, LLC ("BCIP III"), whose manager is BCIP Associates III ("BCIPA III"), whose managing partner is Boylston Coinvestors, LLC ("Boylston"), automatically converted into 49,047, 128,749, 58,750, 13,518 and 15,663 shares of the Issuer's common stock, respectively. BCIPA III may be deemed to share voting and dispositive power with respect to the securities held by BCIP III. BCIPA III disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F4: Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 3,174 shares of the Issuer's Series A-1 Preferred Stock, 8,331 shares of the Issuer's Series A-2 Preferred Stock, 3,799 shares of the Issuer's Series B Preferred Stock, 874 shares of the Issuer's Series C Preferred Stock and 1,013 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III-B, LLC ("BCIP III-B" and together with Fund 2005 and BCIP III, the "Bain Capital Entities"), whose manager is BCIP Associates III-B ("BCIPA III-B"), whose managing partner is Boylston, automatically converted into 987, 2,592, 1,182, 271 and 316 shares of the Issuer's common stock, respectively. BCIPA III-B may be deemed to share voting and dispositive power with respect to the securities held by BCIP III-B. BCIPA III-B disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F5: 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 and Messrs. Krupka and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Entities. BCVI and Messrs. Krupka and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.

Row 3 · 2017-12-11 · Conversion · Acquired 472,271 · Balance 1,901,515

F1: The shares of preferred stock automatically converted into common stock immediately prior to the closing of the Issuer's initial public offering using a calculation defined in the Issuer's Restated Certificate of Incorporation, as amended, based on the initial purchase price and the conversion rate in effect at the time of conversion. The shares of preferred stock automatically converted on a 1-for-3.214 basis and such conversion rate is reflected in the amount of common stock underlying the security.

F2: Bain Capital Venture Investors, LLC ("BCVI") is the general partner of Bain Capital Venture Partners 2005, L.P. ("BCVP"), which is the general partner of Bain Capital Venture Fund 2005, L.P. ("Fund 2005"). As a result, BCVP may be deemed to share voting and dispositive power with respect to the securities held by Fund 2005. BCVP disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein. Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 1,106,387 shares of the Issuer's Series A-1 Preferred Stock, 2,904,268 shares of the Issuer's Series A-2 Preferred Stock, 1,325,258 shares of the Issuer's Series B Preferred Stock, 304,948 shares of the Issuer's Series C Preferred Stock and 353,283 shares of the Issuer's Series D Preferred Stock held by Fund 2005 automatically converted into 344,239, 903,630, 412,339, 94,881 and 109,921 shares of the Issuer's common stock, respectively.

F3: Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 157,639 shares of the Issuer's Series A-1 Preferred Stock, 413,802 shares of the Issuer's Series A-2 Preferred Stock, 188,823 shares of the Issuer's Series B Preferred Stock, 43,449 shares of the Issuer's Series C Preferred Stock and 50,336 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III, LLC ("BCIP III"), whose manager is BCIP Associates III ("BCIPA III"), whose managing partner is Boylston Coinvestors, LLC ("Boylston"), automatically converted into 49,047, 128,749, 58,750, 13,518 and 15,663 shares of the Issuer's common stock, respectively. BCIPA III may be deemed to share voting and dispositive power with respect to the securities held by BCIP III. BCIPA III disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F4: Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 3,174 shares of the Issuer's Series A-1 Preferred Stock, 8,331 shares of the Issuer's Series A-2 Preferred Stock, 3,799 shares of the Issuer's Series B Preferred Stock, 874 shares of the Issuer's Series C Preferred Stock and 1,013 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III-B, LLC ("BCIP III-B" and together with Fund 2005 and BCIP III, the "Bain Capital Entities"), whose manager is BCIP Associates III-B ("BCIPA III-B"), whose managing partner is Boylston, automatically converted into 987, 2,592, 1,182, 271 and 316 shares of the Issuer's common stock, respectively. BCIPA III-B may be deemed to share voting and dispositive power with respect to the securities held by BCIP III-B. BCIPA III-B disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F5: 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 and Messrs. Krupka and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Entities. BCVI and Messrs. Krupka and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.

Row 4 · 2017-12-11 · Conversion · Acquired 108,670 · Balance 2,010,185

F1: The shares of preferred stock automatically converted into common stock immediately prior to the closing of the Issuer's initial public offering using a calculation defined in the Issuer's Restated Certificate of Incorporation, as amended, based on the initial purchase price and the conversion rate in effect at the time of conversion. The shares of preferred stock automatically converted on a 1-for-3.214 basis and such conversion rate is reflected in the amount of common stock underlying the security.

F2: Bain Capital Venture Investors, LLC ("BCVI") is the general partner of Bain Capital Venture Partners 2005, L.P. ("BCVP"), which is the general partner of Bain Capital Venture Fund 2005, L.P. ("Fund 2005"). As a result, BCVP may be deemed to share voting and dispositive power with respect to the securities held by Fund 2005. BCVP disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein. Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 1,106,387 shares of the Issuer's Series A-1 Preferred Stock, 2,904,268 shares of the Issuer's Series A-2 Preferred Stock, 1,325,258 shares of the Issuer's Series B Preferred Stock, 304,948 shares of the Issuer's Series C Preferred Stock and 353,283 shares of the Issuer's Series D Preferred Stock held by Fund 2005 automatically converted into 344,239, 903,630, 412,339, 94,881 and 109,921 shares of the Issuer's common stock, respectively.

F3: Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 157,639 shares of the Issuer's Series A-1 Preferred Stock, 413,802 shares of the Issuer's Series A-2 Preferred Stock, 188,823 shares of the Issuer's Series B Preferred Stock, 43,449 shares of the Issuer's Series C Preferred Stock and 50,336 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III, LLC ("BCIP III"), whose manager is BCIP Associates III ("BCIPA III"), whose managing partner is Boylston Coinvestors, LLC ("Boylston"), automatically converted into 49,047, 128,749, 58,750, 13,518 and 15,663 shares of the Issuer's common stock, respectively. BCIPA III may be deemed to share voting and dispositive power with respect to the securities held by BCIP III. BCIPA III disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F4: Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 3,174 shares of the Issuer's Series A-1 Preferred Stock, 8,331 shares of the Issuer's Series A-2 Preferred Stock, 3,799 shares of the Issuer's Series B Preferred Stock, 874 shares of the Issuer's Series C Preferred Stock and 1,013 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III-B, LLC ("BCIP III-B" and together with Fund 2005 and BCIP III, the "Bain Capital Entities"), whose manager is BCIP Associates III-B ("BCIPA III-B"), whose managing partner is Boylston, automatically converted into 987, 2,592, 1,182, 271 and 316 shares of the Issuer's common stock, respectively. BCIPA III-B may be deemed to share voting and dispositive power with respect to the securities held by BCIP III-B. BCIPA III-B disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F5: 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 and Messrs. Krupka and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Entities. BCVI and Messrs. Krupka and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.

Row 5 · 2017-12-11 · Conversion · Acquired 125,900 · Balance 2,136,085

F1: The shares of preferred stock automatically converted into common stock immediately prior to the closing of the Issuer's initial public offering using a calculation defined in the Issuer's Restated Certificate of Incorporation, as amended, based on the initial purchase price and the conversion rate in effect at the time of conversion. The shares of preferred stock automatically converted on a 1-for-3.214 basis and such conversion rate is reflected in the amount of common stock underlying the security.

F2: Bain Capital Venture Investors, LLC ("BCVI") is the general partner of Bain Capital Venture Partners 2005, L.P. ("BCVP"), which is the general partner of Bain Capital Venture Fund 2005, L.P. ("Fund 2005"). As a result, BCVP may be deemed to share voting and dispositive power with respect to the securities held by Fund 2005. BCVP disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein. Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 1,106,387 shares of the Issuer's Series A-1 Preferred Stock, 2,904,268 shares of the Issuer's Series A-2 Preferred Stock, 1,325,258 shares of the Issuer's Series B Preferred Stock, 304,948 shares of the Issuer's Series C Preferred Stock and 353,283 shares of the Issuer's Series D Preferred Stock held by Fund 2005 automatically converted into 344,239, 903,630, 412,339, 94,881 and 109,921 shares of the Issuer's common stock, respectively.

F3: Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 157,639 shares of the Issuer's Series A-1 Preferred Stock, 413,802 shares of the Issuer's Series A-2 Preferred Stock, 188,823 shares of the Issuer's Series B Preferred Stock, 43,449 shares of the Issuer's Series C Preferred Stock and 50,336 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III, LLC ("BCIP III"), whose manager is BCIP Associates III ("BCIPA III"), whose managing partner is Boylston Coinvestors, LLC ("Boylston"), automatically converted into 49,047, 128,749, 58,750, 13,518 and 15,663 shares of the Issuer's common stock, respectively. BCIPA III may be deemed to share voting and dispositive power with respect to the securities held by BCIP III. BCIPA III disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F4: Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 3,174 shares of the Issuer's Series A-1 Preferred Stock, 8,331 shares of the Issuer's Series A-2 Preferred Stock, 3,799 shares of the Issuer's Series B Preferred Stock, 874 shares of the Issuer's Series C Preferred Stock and 1,013 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III-B, LLC ("BCIP III-B" and together with Fund 2005 and BCIP III, the "Bain Capital Entities"), whose manager is BCIP Associates III-B ("BCIPA III-B"), whose managing partner is Boylston, automatically converted into 987, 2,592, 1,182, 271 and 316 shares of the Issuer's common stock, respectively. BCIPA III-B may be deemed to share voting and dispositive power with respect to the securities held by BCIP III-B. BCIPA III-B disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F5: 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 and Messrs. Krupka and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Entities. BCVI and Messrs. Krupka and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.

Row 6 · 2017-12-11 · Conversion · Disposed 1,267,200 · Balance 0

F1: The shares of preferred stock automatically converted into common stock immediately prior to the closing of the Issuer's initial public offering using a calculation defined in the Issuer's Restated Certificate of Incorporation, as amended, based on the initial purchase price and the conversion rate in effect at the time of conversion. The shares of preferred stock automatically converted on a 1-for-3.214 basis and such conversion rate is reflected in the amount of common stock underlying the security.

F6: These shares were convertible into the Issuer's common stock in accordance with the Issuer's Restated Certificate of Incorporation, as amended, at any time after the issuance of such shares, at the holder's election.

F7: Not applicable.

F2: Bain Capital Venture Investors, LLC ("BCVI") is the general partner of Bain Capital Venture Partners 2005, L.P. ("BCVP"), which is the general partner of Bain Capital Venture Fund 2005, L.P. ("Fund 2005"). As a result, BCVP may be deemed to share voting and dispositive power with respect to the securities held by Fund 2005. BCVP disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein. Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 1,106,387 shares of the Issuer's Series A-1 Preferred Stock, 2,904,268 shares of the Issuer's Series A-2 Preferred Stock, 1,325,258 shares of the Issuer's Series B Preferred Stock, 304,948 shares of the Issuer's Series C Preferred Stock and 353,283 shares of the Issuer's Series D Preferred Stock held by Fund 2005 automatically converted into 344,239, 903,630, 412,339, 94,881 and 109,921 shares of the Issuer's common stock, respectively.

F3: Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 157,639 shares of the Issuer's Series A-1 Preferred Stock, 413,802 shares of the Issuer's Series A-2 Preferred Stock, 188,823 shares of the Issuer's Series B Preferred Stock, 43,449 shares of the Issuer's Series C Preferred Stock and 50,336 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III, LLC ("BCIP III"), whose manager is BCIP Associates III ("BCIPA III"), whose managing partner is Boylston Coinvestors, LLC ("Boylston"), automatically converted into 49,047, 128,749, 58,750, 13,518 and 15,663 shares of the Issuer's common stock, respectively. BCIPA III may be deemed to share voting and dispositive power with respect to the securities held by BCIP III. BCIPA III disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F4: Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 3,174 shares of the Issuer's Series A-1 Preferred Stock, 8,331 shares of the Issuer's Series A-2 Preferred Stock, 3,799 shares of the Issuer's Series B Preferred Stock, 874 shares of the Issuer's Series C Preferred Stock and 1,013 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III-B, LLC ("BCIP III-B" and together with Fund 2005 and BCIP III, the "Bain Capital Entities"), whose manager is BCIP Associates III-B ("BCIPA III-B"), whose managing partner is Boylston, automatically converted into 987, 2,592, 1,182, 271 and 316 shares of the Issuer's common stock, respectively. BCIPA III-B may be deemed to share voting and dispositive power with respect to the securities held by BCIP III-B. BCIPA III-B disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F5: 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 and Messrs. Krupka and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Entities. BCVI and Messrs. Krupka and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.

Row 7 · 2017-12-11 · Conversion · Disposed 3,326,401 · Balance 0

F1: The shares of preferred stock automatically converted into common stock immediately prior to the closing of the Issuer's initial public offering using a calculation defined in the Issuer's Restated Certificate of Incorporation, as amended, based on the initial purchase price and the conversion rate in effect at the time of conversion. The shares of preferred stock automatically converted on a 1-for-3.214 basis and such conversion rate is reflected in the amount of common stock underlying the security.

F6: These shares were convertible into the Issuer's common stock in accordance with the Issuer's Restated Certificate of Incorporation, as amended, at any time after the issuance of such shares, at the holder's election.

F7: Not applicable.

F2: Bain Capital Venture Investors, LLC ("BCVI") is the general partner of Bain Capital Venture Partners 2005, L.P. ("BCVP"), which is the general partner of Bain Capital Venture Fund 2005, L.P. ("Fund 2005"). As a result, BCVP may be deemed to share voting and dispositive power with respect to the securities held by Fund 2005. BCVP disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein. Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 1,106,387 shares of the Issuer's Series A-1 Preferred Stock, 2,904,268 shares of the Issuer's Series A-2 Preferred Stock, 1,325,258 shares of the Issuer's Series B Preferred Stock, 304,948 shares of the Issuer's Series C Preferred Stock and 353,283 shares of the Issuer's Series D Preferred Stock held by Fund 2005 automatically converted into 344,239, 903,630, 412,339, 94,881 and 109,921 shares of the Issuer's common stock, respectively.

F3: Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 157,639 shares of the Issuer's Series A-1 Preferred Stock, 413,802 shares of the Issuer's Series A-2 Preferred Stock, 188,823 shares of the Issuer's Series B Preferred Stock, 43,449 shares of the Issuer's Series C Preferred Stock and 50,336 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III, LLC ("BCIP III"), whose manager is BCIP Associates III ("BCIPA III"), whose managing partner is Boylston Coinvestors, LLC ("Boylston"), automatically converted into 49,047, 128,749, 58,750, 13,518 and 15,663 shares of the Issuer's common stock, respectively. BCIPA III may be deemed to share voting and dispositive power with respect to the securities held by BCIP III. BCIPA III disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F4: Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 3,174 shares of the Issuer's Series A-1 Preferred Stock, 8,331 shares of the Issuer's Series A-2 Preferred Stock, 3,799 shares of the Issuer's Series B Preferred Stock, 874 shares of the Issuer's Series C Preferred Stock and 1,013 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III-B, LLC ("BCIP III-B" and together with Fund 2005 and BCIP III, the "Bain Capital Entities"), whose manager is BCIP Associates III-B ("BCIPA III-B"), whose managing partner is Boylston, automatically converted into 987, 2,592, 1,182, 271 and 316 shares of the Issuer's common stock, respectively. BCIPA III-B may be deemed to share voting and dispositive power with respect to the securities held by BCIP III-B. BCIPA III-B disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F5: 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 and Messrs. Krupka and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Entities. BCVI and Messrs. Krupka and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.

Row 8 · 2017-12-11 · Conversion · Disposed 1,517,880 · Balance 0

F1: The shares of preferred stock automatically converted into common stock immediately prior to the closing of the Issuer's initial public offering using a calculation defined in the Issuer's Restated Certificate of Incorporation, as amended, based on the initial purchase price and the conversion rate in effect at the time of conversion. The shares of preferred stock automatically converted on a 1-for-3.214 basis and such conversion rate is reflected in the amount of common stock underlying the security.

F6: These shares were convertible into the Issuer's common stock in accordance with the Issuer's Restated Certificate of Incorporation, as amended, at any time after the issuance of such shares, at the holder's election.

F7: Not applicable.

F2: Bain Capital Venture Investors, LLC ("BCVI") is the general partner of Bain Capital Venture Partners 2005, L.P. ("BCVP"), which is the general partner of Bain Capital Venture Fund 2005, L.P. ("Fund 2005"). As a result, BCVP may be deemed to share voting and dispositive power with respect to the securities held by Fund 2005. BCVP disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein. Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 1,106,387 shares of the Issuer's Series A-1 Preferred Stock, 2,904,268 shares of the Issuer's Series A-2 Preferred Stock, 1,325,258 shares of the Issuer's Series B Preferred Stock, 304,948 shares of the Issuer's Series C Preferred Stock and 353,283 shares of the Issuer's Series D Preferred Stock held by Fund 2005 automatically converted into 344,239, 903,630, 412,339, 94,881 and 109,921 shares of the Issuer's common stock, respectively.

F3: Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 157,639 shares of the Issuer's Series A-1 Preferred Stock, 413,802 shares of the Issuer's Series A-2 Preferred Stock, 188,823 shares of the Issuer's Series B Preferred Stock, 43,449 shares of the Issuer's Series C Preferred Stock and 50,336 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III, LLC ("BCIP III"), whose manager is BCIP Associates III ("BCIPA III"), whose managing partner is Boylston Coinvestors, LLC ("Boylston"), automatically converted into 49,047, 128,749, 58,750, 13,518 and 15,663 shares of the Issuer's common stock, respectively. BCIPA III may be deemed to share voting and dispositive power with respect to the securities held by BCIP III. BCIPA III disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F4: Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 3,174 shares of the Issuer's Series A-1 Preferred Stock, 8,331 shares of the Issuer's Series A-2 Preferred Stock, 3,799 shares of the Issuer's Series B Preferred Stock, 874 shares of the Issuer's Series C Preferred Stock and 1,013 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III-B, LLC ("BCIP III-B" and together with Fund 2005 and BCIP III, the "Bain Capital Entities"), whose manager is BCIP Associates III-B ("BCIPA III-B"), whose managing partner is Boylston, automatically converted into 987, 2,592, 1,182, 271 and 316 shares of the Issuer's common stock, respectively. BCIPA III-B may be deemed to share voting and dispositive power with respect to the securities held by BCIP III-B. BCIPA III-B disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F5: 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 and Messrs. Krupka and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Entities. BCVI and Messrs. Krupka and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.

Row 9 · 2017-12-11 · Conversion · Disposed 349,271 · Balance 0

F1: The shares of preferred stock automatically converted into common stock immediately prior to the closing of the Issuer's initial public offering using a calculation defined in the Issuer's Restated Certificate of Incorporation, as amended, based on the initial purchase price and the conversion rate in effect at the time of conversion. The shares of preferred stock automatically converted on a 1-for-3.214 basis and such conversion rate is reflected in the amount of common stock underlying the security.

F6: These shares were convertible into the Issuer's common stock in accordance with the Issuer's Restated Certificate of Incorporation, as amended, at any time after the issuance of such shares, at the holder's election.

F7: Not applicable.

F2: Bain Capital Venture Investors, LLC ("BCVI") is the general partner of Bain Capital Venture Partners 2005, L.P. ("BCVP"), which is the general partner of Bain Capital Venture Fund 2005, L.P. ("Fund 2005"). As a result, BCVP may be deemed to share voting and dispositive power with respect to the securities held by Fund 2005. BCVP disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein. Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 1,106,387 shares of the Issuer's Series A-1 Preferred Stock, 2,904,268 shares of the Issuer's Series A-2 Preferred Stock, 1,325,258 shares of the Issuer's Series B Preferred Stock, 304,948 shares of the Issuer's Series C Preferred Stock and 353,283 shares of the Issuer's Series D Preferred Stock held by Fund 2005 automatically converted into 344,239, 903,630, 412,339, 94,881 and 109,921 shares of the Issuer's common stock, respectively.

F3: Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 157,639 shares of the Issuer's Series A-1 Preferred Stock, 413,802 shares of the Issuer's Series A-2 Preferred Stock, 188,823 shares of the Issuer's Series B Preferred Stock, 43,449 shares of the Issuer's Series C Preferred Stock and 50,336 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III, LLC ("BCIP III"), whose manager is BCIP Associates III ("BCIPA III"), whose managing partner is Boylston Coinvestors, LLC ("Boylston"), automatically converted into 49,047, 128,749, 58,750, 13,518 and 15,663 shares of the Issuer's common stock, respectively. BCIPA III may be deemed to share voting and dispositive power with respect to the securities held by BCIP III. BCIPA III disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F4: Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 3,174 shares of the Issuer's Series A-1 Preferred Stock, 8,331 shares of the Issuer's Series A-2 Preferred Stock, 3,799 shares of the Issuer's Series B Preferred Stock, 874 shares of the Issuer's Series C Preferred Stock and 1,013 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III-B, LLC ("BCIP III-B" and together with Fund 2005 and BCIP III, the "Bain Capital Entities"), whose manager is BCIP Associates III-B ("BCIPA III-B"), whose managing partner is Boylston, automatically converted into 987, 2,592, 1,182, 271 and 316 shares of the Issuer's common stock, respectively. BCIPA III-B may be deemed to share voting and dispositive power with respect to the securities held by BCIP III-B. BCIPA III-B disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F5: 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 and Messrs. Krupka and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Entities. BCVI and Messrs. Krupka and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.

Row 10 · 2017-12-11 · Conversion · Disposed 404,632 · Balance 0

F1: The shares of preferred stock automatically converted into common stock immediately prior to the closing of the Issuer's initial public offering using a calculation defined in the Issuer's Restated Certificate of Incorporation, as amended, based on the initial purchase price and the conversion rate in effect at the time of conversion. The shares of preferred stock automatically converted on a 1-for-3.214 basis and such conversion rate is reflected in the amount of common stock underlying the security.

F6: These shares were convertible into the Issuer's common stock in accordance with the Issuer's Restated Certificate of Incorporation, as amended, at any time after the issuance of such shares, at the holder's election.

F7: Not applicable.

F2: Bain Capital Venture Investors, LLC ("BCVI") is the general partner of Bain Capital Venture Partners 2005, L.P. ("BCVP"), which is the general partner of Bain Capital Venture Fund 2005, L.P. ("Fund 2005"). As a result, BCVP may be deemed to share voting and dispositive power with respect to the securities held by Fund 2005. BCVP disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein. Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 1,106,387 shares of the Issuer's Series A-1 Preferred Stock, 2,904,268 shares of the Issuer's Series A-2 Preferred Stock, 1,325,258 shares of the Issuer's Series B Preferred Stock, 304,948 shares of the Issuer's Series C Preferred Stock and 353,283 shares of the Issuer's Series D Preferred Stock held by Fund 2005 automatically converted into 344,239, 903,630, 412,339, 94,881 and 109,921 shares of the Issuer's common stock, respectively.

F3: Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 157,639 shares of the Issuer's Series A-1 Preferred Stock, 413,802 shares of the Issuer's Series A-2 Preferred Stock, 188,823 shares of the Issuer's Series B Preferred Stock, 43,449 shares of the Issuer's Series C Preferred Stock and 50,336 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III, LLC ("BCIP III"), whose manager is BCIP Associates III ("BCIPA III"), whose managing partner is Boylston Coinvestors, LLC ("Boylston"), automatically converted into 49,047, 128,749, 58,750, 13,518 and 15,663 shares of the Issuer's common stock, respectively. BCIPA III may be deemed to share voting and dispositive power with respect to the securities held by BCIP III. BCIPA III disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F4: Immediately prior to the closing of the Issuer's initial public offering on December 11, 2017, the 3,174 shares of the Issuer's Series A-1 Preferred Stock, 8,331 shares of the Issuer's Series A-2 Preferred Stock, 3,799 shares of the Issuer's Series B Preferred Stock, 874 shares of the Issuer's Series C Preferred Stock and 1,013 shares of the Issuer's Series D Preferred Stock held by BCIP Associates III-B, LLC ("BCIP III-B" and together with Fund 2005 and BCIP III, the "Bain Capital Entities"), whose manager is BCIP Associates III-B ("BCIPA III-B"), whose managing partner is Boylston, automatically converted into 987, 2,592, 1,182, 271 and 316 shares of the Issuer's common stock, respectively. BCIPA III-B may be deemed to share voting and dispositive power with respect to the securities held by BCIP III-B. BCIPA III-B disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F5: 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 and Messrs. Krupka and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Entities. BCVI and Messrs. Krupka and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.

Row 1 · 2021-10-29 · Conversion · Acquired 3,992,000 · Balance 4,475,732

F1: Each share of Seed Series, Series A, Series C, Series D, Series E, Series F and Series G Convertible Preferred Stock automatically converted into Common Stock on a 1-for-1 basis immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). These shares had no expiration date.

F3: Bain Capital Venture Investors, LLC ("BCVI") is the general partner of Bain Capital Venture Partners 2009, L.P. ("BCV Partners 2009"), which is the general partner of Bain Capital Venture Fund 2009, L.P. ("BCV Fund 2009"). As a result, BCV Partners 2009 may be deemed to share voting and dispositive power with respect to the securities held by BCV Fund 2009. BCV Partners 2009 disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F4: (Continued from footnote 3) In the Conversion, the 3,808,891 shares of Seed Series Convertible Preferred Stock, 1,636,386 shares of Series A Convertible Preferred Stock, 326,711 shares of Series C Convertible Preferred Stock, 348,609 shares of Series D Convertible Preferred Stock, 485,582 shares of Series E Convertible Preferred Stock, 492,291 shares of Series F Convertible Preferred Stock and 119,445 shares of Series G Convertible Preferred Stock held by BCV Fund 2009 automatically converted into an aggregate of 7,217,915 shares of Common Stock. Following the Conversion, BCV Fund 2009 held 7,644,627 shares of Common Stock, which were automatically reclassified into 7,644,627 shares of Class A Common Stock in the Reclassification.

F5: In the Conversion, the 151,354 shares of Seed Series Convertible Preferred Stock, 41,336 shares of Series A Convertible Preferred Stock, 40,712 shares of Series C Convertible Preferred Stock, 43,440 shares of Series D Convertible Preferred Stock, 60,508 shares of Series E Convertible Preferred Stock, 61,344 shares of Series F Convertible Preferred Stock and 14,884 shares of Series G Convertible Preferred Stock held by BCIP Venture Associates ("BCIP Venture"), whose managing partner is Boylston Coinvestors, LLC ("Boylston"), automatically converted into an aggregate of 413,578 shares of Common Stock. Following the Conversion, BCIP Venture held 466,750 shares of Common Stock, which were automatically reclassified into 466,750 shares of Class A Common Stock in the Reclassification.

F6: In the Conversion, the 31,755 shares of Seed Series Convertible Preferred Stock, 13,453 shares of Series A Convertible Preferred Stock, 2,946 shares of Series C Convertible Preferred Stock, 3,144 shares of Series D Convertible Preferred Stock, 4,379 shares of Series E Convertible Preferred Stock, 4,439 shares of Series F Convertible Preferred Stock and 1,077 shares of Series G Convertible Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B" and, together with BCV Fund 2009 and BCIP Venture, the "Bain Capital Venture Entities"), whose managing partner is Boylston, automatically converted into an aggregate of 61,193 shares of Common Stock. Following the Conversion, BCIP Venture-B held 65,041 shares of Common Stock, which were automatically reclassified into 65,041 shares of Class A Common Stock in the Reclassification.

F7: The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal. As a result, BCVI and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Venture Entities. BCVI and Messrs. Salem and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.

Row 2 · 2021-10-29 · Conversion · Acquired 1,691,175 · Balance 6,166,907

F1: Each share of Seed Series, Series A, Series C, Series D, Series E, Series F and Series G Convertible Preferred Stock automatically converted into Common Stock on a 1-for-1 basis immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). These shares had no expiration date.

F3: Bain Capital Venture Investors, LLC ("BCVI") is the general partner of Bain Capital Venture Partners 2009, L.P. ("BCV Partners 2009"), which is the general partner of Bain Capital Venture Fund 2009, L.P. ("BCV Fund 2009"). As a result, BCV Partners 2009 may be deemed to share voting and dispositive power with respect to the securities held by BCV Fund 2009. BCV Partners 2009 disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F4: (Continued from footnote 3) In the Conversion, the 3,808,891 shares of Seed Series Convertible Preferred Stock, 1,636,386 shares of Series A Convertible Preferred Stock, 326,711 shares of Series C Convertible Preferred Stock, 348,609 shares of Series D Convertible Preferred Stock, 485,582 shares of Series E Convertible Preferred Stock, 492,291 shares of Series F Convertible Preferred Stock and 119,445 shares of Series G Convertible Preferred Stock held by BCV Fund 2009 automatically converted into an aggregate of 7,217,915 shares of Common Stock. Following the Conversion, BCV Fund 2009 held 7,644,627 shares of Common Stock, which were automatically reclassified into 7,644,627 shares of Class A Common Stock in the Reclassification.

F5: In the Conversion, the 151,354 shares of Seed Series Convertible Preferred Stock, 41,336 shares of Series A Convertible Preferred Stock, 40,712 shares of Series C Convertible Preferred Stock, 43,440 shares of Series D Convertible Preferred Stock, 60,508 shares of Series E Convertible Preferred Stock, 61,344 shares of Series F Convertible Preferred Stock and 14,884 shares of Series G Convertible Preferred Stock held by BCIP Venture Associates ("BCIP Venture"), whose managing partner is Boylston Coinvestors, LLC ("Boylston"), automatically converted into an aggregate of 413,578 shares of Common Stock. Following the Conversion, BCIP Venture held 466,750 shares of Common Stock, which were automatically reclassified into 466,750 shares of Class A Common Stock in the Reclassification.

F6: In the Conversion, the 31,755 shares of Seed Series Convertible Preferred Stock, 13,453 shares of Series A Convertible Preferred Stock, 2,946 shares of Series C Convertible Preferred Stock, 3,144 shares of Series D Convertible Preferred Stock, 4,379 shares of Series E Convertible Preferred Stock, 4,439 shares of Series F Convertible Preferred Stock and 1,077 shares of Series G Convertible Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B" and, together with BCV Fund 2009 and BCIP Venture, the "Bain Capital Venture Entities"), whose managing partner is Boylston, automatically converted into an aggregate of 61,193 shares of Common Stock. Following the Conversion, BCIP Venture-B held 65,041 shares of Common Stock, which were automatically reclassified into 65,041 shares of Class A Common Stock in the Reclassification.

F7: The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal. As a result, BCVI and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Venture Entities. BCVI and Messrs. Salem and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.

Row 3 · 2021-10-29 · Conversion · Acquired 370,369 · Balance 6,537,276

F1: Each share of Seed Series, Series A, Series C, Series D, Series E, Series F and Series G Convertible Preferred Stock automatically converted into Common Stock on a 1-for-1 basis immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). These shares had no expiration date.

F3: Bain Capital Venture Investors, LLC ("BCVI") is the general partner of Bain Capital Venture Partners 2009, L.P. ("BCV Partners 2009"), which is the general partner of Bain Capital Venture Fund 2009, L.P. ("BCV Fund 2009"). As a result, BCV Partners 2009 may be deemed to share voting and dispositive power with respect to the securities held by BCV Fund 2009. BCV Partners 2009 disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F4: (Continued from footnote 3) In the Conversion, the 3,808,891 shares of Seed Series Convertible Preferred Stock, 1,636,386 shares of Series A Convertible Preferred Stock, 326,711 shares of Series C Convertible Preferred Stock, 348,609 shares of Series D Convertible Preferred Stock, 485,582 shares of Series E Convertible Preferred Stock, 492,291 shares of Series F Convertible Preferred Stock and 119,445 shares of Series G Convertible Preferred Stock held by BCV Fund 2009 automatically converted into an aggregate of 7,217,915 shares of Common Stock. Following the Conversion, BCV Fund 2009 held 7,644,627 shares of Common Stock, which were automatically reclassified into 7,644,627 shares of Class A Common Stock in the Reclassification.

F5: In the Conversion, the 151,354 shares of Seed Series Convertible Preferred Stock, 41,336 shares of Series A Convertible Preferred Stock, 40,712 shares of Series C Convertible Preferred Stock, 43,440 shares of Series D Convertible Preferred Stock, 60,508 shares of Series E Convertible Preferred Stock, 61,344 shares of Series F Convertible Preferred Stock and 14,884 shares of Series G Convertible Preferred Stock held by BCIP Venture Associates ("BCIP Venture"), whose managing partner is Boylston Coinvestors, LLC ("Boylston"), automatically converted into an aggregate of 413,578 shares of Common Stock. Following the Conversion, BCIP Venture held 466,750 shares of Common Stock, which were automatically reclassified into 466,750 shares of Class A Common Stock in the Reclassification.

F6: In the Conversion, the 31,755 shares of Seed Series Convertible Preferred Stock, 13,453 shares of Series A Convertible Preferred Stock, 2,946 shares of Series C Convertible Preferred Stock, 3,144 shares of Series D Convertible Preferred Stock, 4,379 shares of Series E Convertible Preferred Stock, 4,439 shares of Series F Convertible Preferred Stock and 1,077 shares of Series G Convertible Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B" and, together with BCV Fund 2009 and BCIP Venture, the "Bain Capital Venture Entities"), whose managing partner is Boylston, automatically converted into an aggregate of 61,193 shares of Common Stock. Following the Conversion, BCIP Venture-B held 65,041 shares of Common Stock, which were automatically reclassified into 65,041 shares of Class A Common Stock in the Reclassification.

F7: The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal. As a result, BCVI and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Venture Entities. BCVI and Messrs. Salem and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.

Row 4 · 2021-10-29 · Conversion · Acquired 395,193 · Balance 6,932,469

F1: Each share of Seed Series, Series A, Series C, Series D, Series E, Series F and Series G Convertible Preferred Stock automatically converted into Common Stock on a 1-for-1 basis immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). These shares had no expiration date.

F3: Bain Capital Venture Investors, LLC ("BCVI") is the general partner of Bain Capital Venture Partners 2009, L.P. ("BCV Partners 2009"), which is the general partner of Bain Capital Venture Fund 2009, L.P. ("BCV Fund 2009"). As a result, BCV Partners 2009 may be deemed to share voting and dispositive power with respect to the securities held by BCV Fund 2009. BCV Partners 2009 disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F4: (Continued from footnote 3) In the Conversion, the 3,808,891 shares of Seed Series Convertible Preferred Stock, 1,636,386 shares of Series A Convertible Preferred Stock, 326,711 shares of Series C Convertible Preferred Stock, 348,609 shares of Series D Convertible Preferred Stock, 485,582 shares of Series E Convertible Preferred Stock, 492,291 shares of Series F Convertible Preferred Stock and 119,445 shares of Series G Convertible Preferred Stock held by BCV Fund 2009 automatically converted into an aggregate of 7,217,915 shares of Common Stock. Following the Conversion, BCV Fund 2009 held 7,644,627 shares of Common Stock, which were automatically reclassified into 7,644,627 shares of Class A Common Stock in the Reclassification.

F5: In the Conversion, the 151,354 shares of Seed Series Convertible Preferred Stock, 41,336 shares of Series A Convertible Preferred Stock, 40,712 shares of Series C Convertible Preferred Stock, 43,440 shares of Series D Convertible Preferred Stock, 60,508 shares of Series E Convertible Preferred Stock, 61,344 shares of Series F Convertible Preferred Stock and 14,884 shares of Series G Convertible Preferred Stock held by BCIP Venture Associates ("BCIP Venture"), whose managing partner is Boylston Coinvestors, LLC ("Boylston"), automatically converted into an aggregate of 413,578 shares of Common Stock. Following the Conversion, BCIP Venture held 466,750 shares of Common Stock, which were automatically reclassified into 466,750 shares of Class A Common Stock in the Reclassification.

F6: In the Conversion, the 31,755 shares of Seed Series Convertible Preferred Stock, 13,453 shares of Series A Convertible Preferred Stock, 2,946 shares of Series C Convertible Preferred Stock, 3,144 shares of Series D Convertible Preferred Stock, 4,379 shares of Series E Convertible Preferred Stock, 4,439 shares of Series F Convertible Preferred Stock and 1,077 shares of Series G Convertible Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B" and, together with BCV Fund 2009 and BCIP Venture, the "Bain Capital Venture Entities"), whose managing partner is Boylston, automatically converted into an aggregate of 61,193 shares of Common Stock. Following the Conversion, BCIP Venture-B held 65,041 shares of Common Stock, which were automatically reclassified into 65,041 shares of Class A Common Stock in the Reclassification.

F7: The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal. As a result, BCVI and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Venture Entities. BCVI and Messrs. Salem and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.

Row 5 · 2021-10-29 · Conversion · Acquired 550,469 · Balance 7,482,938

F1: Each share of Seed Series, Series A, Series C, Series D, Series E, Series F and Series G Convertible Preferred Stock automatically converted into Common Stock on a 1-for-1 basis immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). These shares had no expiration date.

F3: Bain Capital Venture Investors, LLC ("BCVI") is the general partner of Bain Capital Venture Partners 2009, L.P. ("BCV Partners 2009"), which is the general partner of Bain Capital Venture Fund 2009, L.P. ("BCV Fund 2009"). As a result, BCV Partners 2009 may be deemed to share voting and dispositive power with respect to the securities held by BCV Fund 2009. BCV Partners 2009 disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F4: (Continued from footnote 3) In the Conversion, the 3,808,891 shares of Seed Series Convertible Preferred Stock, 1,636,386 shares of Series A Convertible Preferred Stock, 326,711 shares of Series C Convertible Preferred Stock, 348,609 shares of Series D Convertible Preferred Stock, 485,582 shares of Series E Convertible Preferred Stock, 492,291 shares of Series F Convertible Preferred Stock and 119,445 shares of Series G Convertible Preferred Stock held by BCV Fund 2009 automatically converted into an aggregate of 7,217,915 shares of Common Stock. Following the Conversion, BCV Fund 2009 held 7,644,627 shares of Common Stock, which were automatically reclassified into 7,644,627 shares of Class A Common Stock in the Reclassification.

F5: In the Conversion, the 151,354 shares of Seed Series Convertible Preferred Stock, 41,336 shares of Series A Convertible Preferred Stock, 40,712 shares of Series C Convertible Preferred Stock, 43,440 shares of Series D Convertible Preferred Stock, 60,508 shares of Series E Convertible Preferred Stock, 61,344 shares of Series F Convertible Preferred Stock and 14,884 shares of Series G Convertible Preferred Stock held by BCIP Venture Associates ("BCIP Venture"), whose managing partner is Boylston Coinvestors, LLC ("Boylston"), automatically converted into an aggregate of 413,578 shares of Common Stock. Following the Conversion, BCIP Venture held 466,750 shares of Common Stock, which were automatically reclassified into 466,750 shares of Class A Common Stock in the Reclassification.

F6: In the Conversion, the 31,755 shares of Seed Series Convertible Preferred Stock, 13,453 shares of Series A Convertible Preferred Stock, 2,946 shares of Series C Convertible Preferred Stock, 3,144 shares of Series D Convertible Preferred Stock, 4,379 shares of Series E Convertible Preferred Stock, 4,439 shares of Series F Convertible Preferred Stock and 1,077 shares of Series G Convertible Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B" and, together with BCV Fund 2009 and BCIP Venture, the "Bain Capital Venture Entities"), whose managing partner is Boylston, automatically converted into an aggregate of 61,193 shares of Common Stock. Following the Conversion, BCIP Venture-B held 65,041 shares of Common Stock, which were automatically reclassified into 65,041 shares of Class A Common Stock in the Reclassification.

F7: The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal. As a result, BCVI and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Venture Entities. BCVI and Messrs. Salem and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.

Row 6 · 2021-10-29 · Conversion · Acquired 558,074 · Balance 8,041,012

F1: Each share of Seed Series, Series A, Series C, Series D, Series E, Series F and Series G Convertible Preferred Stock automatically converted into Common Stock on a 1-for-1 basis immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). These shares had no expiration date.

F3: Bain Capital Venture Investors, LLC ("BCVI") is the general partner of Bain Capital Venture Partners 2009, L.P. ("BCV Partners 2009"), which is the general partner of Bain Capital Venture Fund 2009, L.P. ("BCV Fund 2009"). As a result, BCV Partners 2009 may be deemed to share voting and dispositive power with respect to the securities held by BCV Fund 2009. BCV Partners 2009 disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F4: (Continued from footnote 3) In the Conversion, the 3,808,891 shares of Seed Series Convertible Preferred Stock, 1,636,386 shares of Series A Convertible Preferred Stock, 326,711 shares of Series C Convertible Preferred Stock, 348,609 shares of Series D Convertible Preferred Stock, 485,582 shares of Series E Convertible Preferred Stock, 492,291 shares of Series F Convertible Preferred Stock and 119,445 shares of Series G Convertible Preferred Stock held by BCV Fund 2009 automatically converted into an aggregate of 7,217,915 shares of Common Stock. Following the Conversion, BCV Fund 2009 held 7,644,627 shares of Common Stock, which were automatically reclassified into 7,644,627 shares of Class A Common Stock in the Reclassification.

F5: In the Conversion, the 151,354 shares of Seed Series Convertible Preferred Stock, 41,336 shares of Series A Convertible Preferred Stock, 40,712 shares of Series C Convertible Preferred Stock, 43,440 shares of Series D Convertible Preferred Stock, 60,508 shares of Series E Convertible Preferred Stock, 61,344 shares of Series F Convertible Preferred Stock and 14,884 shares of Series G Convertible Preferred Stock held by BCIP Venture Associates ("BCIP Venture"), whose managing partner is Boylston Coinvestors, LLC ("Boylston"), automatically converted into an aggregate of 413,578 shares of Common Stock. Following the Conversion, BCIP Venture held 466,750 shares of Common Stock, which were automatically reclassified into 466,750 shares of Class A Common Stock in the Reclassification.

F6: In the Conversion, the 31,755 shares of Seed Series Convertible Preferred Stock, 13,453 shares of Series A Convertible Preferred Stock, 2,946 shares of Series C Convertible Preferred Stock, 3,144 shares of Series D Convertible Preferred Stock, 4,379 shares of Series E Convertible Preferred Stock, 4,439 shares of Series F Convertible Preferred Stock and 1,077 shares of Series G Convertible Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B" and, together with BCV Fund 2009 and BCIP Venture, the "Bain Capital Venture Entities"), whose managing partner is Boylston, automatically converted into an aggregate of 61,193 shares of Common Stock. Following the Conversion, BCIP Venture-B held 65,041 shares of Common Stock, which were automatically reclassified into 65,041 shares of Class A Common Stock in the Reclassification.

F7: The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal. As a result, BCVI and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Venture Entities. BCVI and Messrs. Salem and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.

Row 7 · 2021-10-29 · Conversion · Acquired 135,406 · Balance 8,176,418

F1: Each share of Seed Series, Series A, Series C, Series D, Series E, Series F and Series G Convertible Preferred Stock automatically converted into Common Stock on a 1-for-1 basis immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). These shares had no expiration date.

F3: Bain Capital Venture Investors, LLC ("BCVI") is the general partner of Bain Capital Venture Partners 2009, L.P. ("BCV Partners 2009"), which is the general partner of Bain Capital Venture Fund 2009, L.P. ("BCV Fund 2009"). As a result, BCV Partners 2009 may be deemed to share voting and dispositive power with respect to the securities held by BCV Fund 2009. BCV Partners 2009 disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F4: (Continued from footnote 3) In the Conversion, the 3,808,891 shares of Seed Series Convertible Preferred Stock, 1,636,386 shares of Series A Convertible Preferred Stock, 326,711 shares of Series C Convertible Preferred Stock, 348,609 shares of Series D Convertible Preferred Stock, 485,582 shares of Series E Convertible Preferred Stock, 492,291 shares of Series F Convertible Preferred Stock and 119,445 shares of Series G Convertible Preferred Stock held by BCV Fund 2009 automatically converted into an aggregate of 7,217,915 shares of Common Stock. Following the Conversion, BCV Fund 2009 held 7,644,627 shares of Common Stock, which were automatically reclassified into 7,644,627 shares of Class A Common Stock in the Reclassification.

F5: In the Conversion, the 151,354 shares of Seed Series Convertible Preferred Stock, 41,336 shares of Series A Convertible Preferred Stock, 40,712 shares of Series C Convertible Preferred Stock, 43,440 shares of Series D Convertible Preferred Stock, 60,508 shares of Series E Convertible Preferred Stock, 61,344 shares of Series F Convertible Preferred Stock and 14,884 shares of Series G Convertible Preferred Stock held by BCIP Venture Associates ("BCIP Venture"), whose managing partner is Boylston Coinvestors, LLC ("Boylston"), automatically converted into an aggregate of 413,578 shares of Common Stock. Following the Conversion, BCIP Venture held 466,750 shares of Common Stock, which were automatically reclassified into 466,750 shares of Class A Common Stock in the Reclassification.

F6: In the Conversion, the 31,755 shares of Seed Series Convertible Preferred Stock, 13,453 shares of Series A Convertible Preferred Stock, 2,946 shares of Series C Convertible Preferred Stock, 3,144 shares of Series D Convertible Preferred Stock, 4,379 shares of Series E Convertible Preferred Stock, 4,439 shares of Series F Convertible Preferred Stock and 1,077 shares of Series G Convertible Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B" and, together with BCV Fund 2009 and BCIP Venture, the "Bain Capital Venture Entities"), whose managing partner is Boylston, automatically converted into an aggregate of 61,193 shares of Common Stock. Following the Conversion, BCIP Venture-B held 65,041 shares of Common Stock, which were automatically reclassified into 65,041 shares of Class A Common Stock in the Reclassification.

F7: The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal. As a result, BCVI and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Venture Entities. BCVI and Messrs. Salem and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.

Row 8 · 2021-10-29 · Other · Disposed 8,176,418 · Balance 0

F2: Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was reclassified into one share of Class A Common Stock upon the closing of the Issuer's initial public offering (the "Reclassification").

F3: Bain Capital Venture Investors, LLC ("BCVI") is the general partner of Bain Capital Venture Partners 2009, L.P. ("BCV Partners 2009"), which is the general partner of Bain Capital Venture Fund 2009, L.P. ("BCV Fund 2009"). As a result, BCV Partners 2009 may be deemed to share voting and dispositive power with respect to the securities held by BCV Fund 2009. BCV Partners 2009 disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F4: (Continued from footnote 3) In the Conversion, the 3,808,891 shares of Seed Series Convertible Preferred Stock, 1,636,386 shares of Series A Convertible Preferred Stock, 326,711 shares of Series C Convertible Preferred Stock, 348,609 shares of Series D Convertible Preferred Stock, 485,582 shares of Series E Convertible Preferred Stock, 492,291 shares of Series F Convertible Preferred Stock and 119,445 shares of Series G Convertible Preferred Stock held by BCV Fund 2009 automatically converted into an aggregate of 7,217,915 shares of Common Stock. Following the Conversion, BCV Fund 2009 held 7,644,627 shares of Common Stock, which were automatically reclassified into 7,644,627 shares of Class A Common Stock in the Reclassification.

F5: In the Conversion, the 151,354 shares of Seed Series Convertible Preferred Stock, 41,336 shares of Series A Convertible Preferred Stock, 40,712 shares of Series C Convertible Preferred Stock, 43,440 shares of Series D Convertible Preferred Stock, 60,508 shares of Series E Convertible Preferred Stock, 61,344 shares of Series F Convertible Preferred Stock and 14,884 shares of Series G Convertible Preferred Stock held by BCIP Venture Associates ("BCIP Venture"), whose managing partner is Boylston Coinvestors, LLC ("Boylston"), automatically converted into an aggregate of 413,578 shares of Common Stock. Following the Conversion, BCIP Venture held 466,750 shares of Common Stock, which were automatically reclassified into 466,750 shares of Class A Common Stock in the Reclassification.

F6: In the Conversion, the 31,755 shares of Seed Series Convertible Preferred Stock, 13,453 shares of Series A Convertible Preferred Stock, 2,946 shares of Series C Convertible Preferred Stock, 3,144 shares of Series D Convertible Preferred Stock, 4,379 shares of Series E Convertible Preferred Stock, 4,439 shares of Series F Convertible Preferred Stock and 1,077 shares of Series G Convertible Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B" and, together with BCV Fund 2009 and BCIP Venture, the "Bain Capital Venture Entities"), whose managing partner is Boylston, automatically converted into an aggregate of 61,193 shares of Common Stock. Following the Conversion, BCIP Venture-B held 65,041 shares of Common Stock, which were automatically reclassified into 65,041 shares of Class A Common Stock in the Reclassification.

F7: The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal. As a result, BCVI and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Venture Entities. BCVI and Messrs. Salem and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.

Row 9 · 2021-10-29 · Other · Acquired 8,176,418 · Balance 8,176,418

F2: Pursuant to a reclassification exempt under Rule 16b-7, each share of Common Stock was reclassified into one share of Class A Common Stock upon the closing of the Issuer's initial public offering (the "Reclassification").

F3: Bain Capital Venture Investors, LLC ("BCVI") is the general partner of Bain Capital Venture Partners 2009, L.P. ("BCV Partners 2009"), which is the general partner of Bain Capital Venture Fund 2009, L.P. ("BCV Fund 2009"). As a result, BCV Partners 2009 may be deemed to share voting and dispositive power with respect to the securities held by BCV Fund 2009. BCV Partners 2009 disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F4: (Continued from footnote 3) In the Conversion, the 3,808,891 shares of Seed Series Convertible Preferred Stock, 1,636,386 shares of Series A Convertible Preferred Stock, 326,711 shares of Series C Convertible Preferred Stock, 348,609 shares of Series D Convertible Preferred Stock, 485,582 shares of Series E Convertible Preferred Stock, 492,291 shares of Series F Convertible Preferred Stock and 119,445 shares of Series G Convertible Preferred Stock held by BCV Fund 2009 automatically converted into an aggregate of 7,217,915 shares of Common Stock. Following the Conversion, BCV Fund 2009 held 7,644,627 shares of Common Stock, which were automatically reclassified into 7,644,627 shares of Class A Common Stock in the Reclassification.

F5: In the Conversion, the 151,354 shares of Seed Series Convertible Preferred Stock, 41,336 shares of Series A Convertible Preferred Stock, 40,712 shares of Series C Convertible Preferred Stock, 43,440 shares of Series D Convertible Preferred Stock, 60,508 shares of Series E Convertible Preferred Stock, 61,344 shares of Series F Convertible Preferred Stock and 14,884 shares of Series G Convertible Preferred Stock held by BCIP Venture Associates ("BCIP Venture"), whose managing partner is Boylston Coinvestors, LLC ("Boylston"), automatically converted into an aggregate of 413,578 shares of Common Stock. Following the Conversion, BCIP Venture held 466,750 shares of Common Stock, which were automatically reclassified into 466,750 shares of Class A Common Stock in the Reclassification.

F6: In the Conversion, the 31,755 shares of Seed Series Convertible Preferred Stock, 13,453 shares of Series A Convertible Preferred Stock, 2,946 shares of Series C Convertible Preferred Stock, 3,144 shares of Series D Convertible Preferred Stock, 4,379 shares of Series E Convertible Preferred Stock, 4,439 shares of Series F Convertible Preferred Stock and 1,077 shares of Series G Convertible Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B" and, together with BCV Fund 2009 and BCIP Venture, the "Bain Capital Venture Entities"), whose managing partner is Boylston, automatically converted into an aggregate of 61,193 shares of Common Stock. Following the Conversion, BCIP Venture-B held 65,041 shares of Common Stock, which were automatically reclassified into 65,041 shares of Class A Common Stock in the Reclassification.

F7: The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal. As a result, BCVI and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Venture Entities. BCVI and Messrs. Salem and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.

Row 10 · 2021-10-29 · Conversion · Disposed 3,992,000 · Balance 0

F1: Each share of Seed Series, Series A, Series C, Series D, Series E, Series F and Series G Convertible Preferred Stock automatically converted into Common Stock on a 1-for-1 basis immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). These shares had no expiration date.

F3: Bain Capital Venture Investors, LLC ("BCVI") is the general partner of Bain Capital Venture Partners 2009, L.P. ("BCV Partners 2009"), which is the general partner of Bain Capital Venture Fund 2009, L.P. ("BCV Fund 2009"). As a result, BCV Partners 2009 may be deemed to share voting and dispositive power with respect to the securities held by BCV Fund 2009. BCV Partners 2009 disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F4: (Continued from footnote 3) In the Conversion, the 3,808,891 shares of Seed Series Convertible Preferred Stock, 1,636,386 shares of Series A Convertible Preferred Stock, 326,711 shares of Series C Convertible Preferred Stock, 348,609 shares of Series D Convertible Preferred Stock, 485,582 shares of Series E Convertible Preferred Stock, 492,291 shares of Series F Convertible Preferred Stock and 119,445 shares of Series G Convertible Preferred Stock held by BCV Fund 2009 automatically converted into an aggregate of 7,217,915 shares of Common Stock. Following the Conversion, BCV Fund 2009 held 7,644,627 shares of Common Stock, which were automatically reclassified into 7,644,627 shares of Class A Common Stock in the Reclassification.

F5: In the Conversion, the 151,354 shares of Seed Series Convertible Preferred Stock, 41,336 shares of Series A Convertible Preferred Stock, 40,712 shares of Series C Convertible Preferred Stock, 43,440 shares of Series D Convertible Preferred Stock, 60,508 shares of Series E Convertible Preferred Stock, 61,344 shares of Series F Convertible Preferred Stock and 14,884 shares of Series G Convertible Preferred Stock held by BCIP Venture Associates ("BCIP Venture"), whose managing partner is Boylston Coinvestors, LLC ("Boylston"), automatically converted into an aggregate of 413,578 shares of Common Stock. Following the Conversion, BCIP Venture held 466,750 shares of Common Stock, which were automatically reclassified into 466,750 shares of Class A Common Stock in the Reclassification.

F6: In the Conversion, the 31,755 shares of Seed Series Convertible Preferred Stock, 13,453 shares of Series A Convertible Preferred Stock, 2,946 shares of Series C Convertible Preferred Stock, 3,144 shares of Series D Convertible Preferred Stock, 4,379 shares of Series E Convertible Preferred Stock, 4,439 shares of Series F Convertible Preferred Stock and 1,077 shares of Series G Convertible Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B" and, together with BCV Fund 2009 and BCIP Venture, the "Bain Capital Venture Entities"), whose managing partner is Boylston, automatically converted into an aggregate of 61,193 shares of Common Stock. Following the Conversion, BCIP Venture-B held 65,041 shares of Common Stock, which were automatically reclassified into 65,041 shares of Class A Common Stock in the Reclassification.

F7: The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal. As a result, BCVI and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Venture Entities. BCVI and Messrs. Salem and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.

Row 11 · 2021-10-29 · Conversion · Disposed 1,691,175 · Balance 0

F1: Each share of Seed Series, Series A, Series C, Series D, Series E, Series F and Series G Convertible Preferred Stock automatically converted into Common Stock on a 1-for-1 basis immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). These shares had no expiration date.

F3: Bain Capital Venture Investors, LLC ("BCVI") is the general partner of Bain Capital Venture Partners 2009, L.P. ("BCV Partners 2009"), which is the general partner of Bain Capital Venture Fund 2009, L.P. ("BCV Fund 2009"). As a result, BCV Partners 2009 may be deemed to share voting and dispositive power with respect to the securities held by BCV Fund 2009. BCV Partners 2009 disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F4: (Continued from footnote 3) In the Conversion, the 3,808,891 shares of Seed Series Convertible Preferred Stock, 1,636,386 shares of Series A Convertible Preferred Stock, 326,711 shares of Series C Convertible Preferred Stock, 348,609 shares of Series D Convertible Preferred Stock, 485,582 shares of Series E Convertible Preferred Stock, 492,291 shares of Series F Convertible Preferred Stock and 119,445 shares of Series G Convertible Preferred Stock held by BCV Fund 2009 automatically converted into an aggregate of 7,217,915 shares of Common Stock. Following the Conversion, BCV Fund 2009 held 7,644,627 shares of Common Stock, which were automatically reclassified into 7,644,627 shares of Class A Common Stock in the Reclassification.

F5: In the Conversion, the 151,354 shares of Seed Series Convertible Preferred Stock, 41,336 shares of Series A Convertible Preferred Stock, 40,712 shares of Series C Convertible Preferred Stock, 43,440 shares of Series D Convertible Preferred Stock, 60,508 shares of Series E Convertible Preferred Stock, 61,344 shares of Series F Convertible Preferred Stock and 14,884 shares of Series G Convertible Preferred Stock held by BCIP Venture Associates ("BCIP Venture"), whose managing partner is Boylston Coinvestors, LLC ("Boylston"), automatically converted into an aggregate of 413,578 shares of Common Stock. Following the Conversion, BCIP Venture held 466,750 shares of Common Stock, which were automatically reclassified into 466,750 shares of Class A Common Stock in the Reclassification.

F6: In the Conversion, the 31,755 shares of Seed Series Convertible Preferred Stock, 13,453 shares of Series A Convertible Preferred Stock, 2,946 shares of Series C Convertible Preferred Stock, 3,144 shares of Series D Convertible Preferred Stock, 4,379 shares of Series E Convertible Preferred Stock, 4,439 shares of Series F Convertible Preferred Stock and 1,077 shares of Series G Convertible Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B" and, together with BCV Fund 2009 and BCIP Venture, the "Bain Capital Venture Entities"), whose managing partner is Boylston, automatically converted into an aggregate of 61,193 shares of Common Stock. Following the Conversion, BCIP Venture-B held 65,041 shares of Common Stock, which were automatically reclassified into 65,041 shares of Class A Common Stock in the Reclassification.

F7: The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal. As a result, BCVI and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Venture Entities. BCVI and Messrs. Salem and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.

Row 12 · 2021-10-29 · Conversion · Disposed 370,369 · Balance 0

F1: Each share of Seed Series, Series A, Series C, Series D, Series E, Series F and Series G Convertible Preferred Stock automatically converted into Common Stock on a 1-for-1 basis immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). These shares had no expiration date.

F3: Bain Capital Venture Investors, LLC ("BCVI") is the general partner of Bain Capital Venture Partners 2009, L.P. ("BCV Partners 2009"), which is the general partner of Bain Capital Venture Fund 2009, L.P. ("BCV Fund 2009"). As a result, BCV Partners 2009 may be deemed to share voting and dispositive power with respect to the securities held by BCV Fund 2009. BCV Partners 2009 disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F4: (Continued from footnote 3) In the Conversion, the 3,808,891 shares of Seed Series Convertible Preferred Stock, 1,636,386 shares of Series A Convertible Preferred Stock, 326,711 shares of Series C Convertible Preferred Stock, 348,609 shares of Series D Convertible Preferred Stock, 485,582 shares of Series E Convertible Preferred Stock, 492,291 shares of Series F Convertible Preferred Stock and 119,445 shares of Series G Convertible Preferred Stock held by BCV Fund 2009 automatically converted into an aggregate of 7,217,915 shares of Common Stock. Following the Conversion, BCV Fund 2009 held 7,644,627 shares of Common Stock, which were automatically reclassified into 7,644,627 shares of Class A Common Stock in the Reclassification.

F5: In the Conversion, the 151,354 shares of Seed Series Convertible Preferred Stock, 41,336 shares of Series A Convertible Preferred Stock, 40,712 shares of Series C Convertible Preferred Stock, 43,440 shares of Series D Convertible Preferred Stock, 60,508 shares of Series E Convertible Preferred Stock, 61,344 shares of Series F Convertible Preferred Stock and 14,884 shares of Series G Convertible Preferred Stock held by BCIP Venture Associates ("BCIP Venture"), whose managing partner is Boylston Coinvestors, LLC ("Boylston"), automatically converted into an aggregate of 413,578 shares of Common Stock. Following the Conversion, BCIP Venture held 466,750 shares of Common Stock, which were automatically reclassified into 466,750 shares of Class A Common Stock in the Reclassification.

F6: In the Conversion, the 31,755 shares of Seed Series Convertible Preferred Stock, 13,453 shares of Series A Convertible Preferred Stock, 2,946 shares of Series C Convertible Preferred Stock, 3,144 shares of Series D Convertible Preferred Stock, 4,379 shares of Series E Convertible Preferred Stock, 4,439 shares of Series F Convertible Preferred Stock and 1,077 shares of Series G Convertible Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B" and, together with BCV Fund 2009 and BCIP Venture, the "Bain Capital Venture Entities"), whose managing partner is Boylston, automatically converted into an aggregate of 61,193 shares of Common Stock. Following the Conversion, BCIP Venture-B held 65,041 shares of Common Stock, which were automatically reclassified into 65,041 shares of Class A Common Stock in the Reclassification.

F7: The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal. As a result, BCVI and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Venture Entities. BCVI and Messrs. Salem and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.

Row 13 · 2021-10-29 · Conversion · Disposed 395,193 · Balance 0

F1: Each share of Seed Series, Series A, Series C, Series D, Series E, Series F and Series G Convertible Preferred Stock automatically converted into Common Stock on a 1-for-1 basis immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). These shares had no expiration date.

F3: Bain Capital Venture Investors, LLC ("BCVI") is the general partner of Bain Capital Venture Partners 2009, L.P. ("BCV Partners 2009"), which is the general partner of Bain Capital Venture Fund 2009, L.P. ("BCV Fund 2009"). As a result, BCV Partners 2009 may be deemed to share voting and dispositive power with respect to the securities held by BCV Fund 2009. BCV Partners 2009 disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F4: (Continued from footnote 3) In the Conversion, the 3,808,891 shares of Seed Series Convertible Preferred Stock, 1,636,386 shares of Series A Convertible Preferred Stock, 326,711 shares of Series C Convertible Preferred Stock, 348,609 shares of Series D Convertible Preferred Stock, 485,582 shares of Series E Convertible Preferred Stock, 492,291 shares of Series F Convertible Preferred Stock and 119,445 shares of Series G Convertible Preferred Stock held by BCV Fund 2009 automatically converted into an aggregate of 7,217,915 shares of Common Stock. Following the Conversion, BCV Fund 2009 held 7,644,627 shares of Common Stock, which were automatically reclassified into 7,644,627 shares of Class A Common Stock in the Reclassification.

F5: In the Conversion, the 151,354 shares of Seed Series Convertible Preferred Stock, 41,336 shares of Series A Convertible Preferred Stock, 40,712 shares of Series C Convertible Preferred Stock, 43,440 shares of Series D Convertible Preferred Stock, 60,508 shares of Series E Convertible Preferred Stock, 61,344 shares of Series F Convertible Preferred Stock and 14,884 shares of Series G Convertible Preferred Stock held by BCIP Venture Associates ("BCIP Venture"), whose managing partner is Boylston Coinvestors, LLC ("Boylston"), automatically converted into an aggregate of 413,578 shares of Common Stock. Following the Conversion, BCIP Venture held 466,750 shares of Common Stock, which were automatically reclassified into 466,750 shares of Class A Common Stock in the Reclassification.

F6: In the Conversion, the 31,755 shares of Seed Series Convertible Preferred Stock, 13,453 shares of Series A Convertible Preferred Stock, 2,946 shares of Series C Convertible Preferred Stock, 3,144 shares of Series D Convertible Preferred Stock, 4,379 shares of Series E Convertible Preferred Stock, 4,439 shares of Series F Convertible Preferred Stock and 1,077 shares of Series G Convertible Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B" and, together with BCV Fund 2009 and BCIP Venture, the "Bain Capital Venture Entities"), whose managing partner is Boylston, automatically converted into an aggregate of 61,193 shares of Common Stock. Following the Conversion, BCIP Venture-B held 65,041 shares of Common Stock, which were automatically reclassified into 65,041 shares of Class A Common Stock in the Reclassification.

F7: The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal. As a result, BCVI and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Venture Entities. BCVI and Messrs. Salem and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.

Row 14 · 2021-10-29 · Conversion · Disposed 550,469 · Balance 0

F1: Each share of Seed Series, Series A, Series C, Series D, Series E, Series F and Series G Convertible Preferred Stock automatically converted into Common Stock on a 1-for-1 basis immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). These shares had no expiration date.

F3: Bain Capital Venture Investors, LLC ("BCVI") is the general partner of Bain Capital Venture Partners 2009, L.P. ("BCV Partners 2009"), which is the general partner of Bain Capital Venture Fund 2009, L.P. ("BCV Fund 2009"). As a result, BCV Partners 2009 may be deemed to share voting and dispositive power with respect to the securities held by BCV Fund 2009. BCV Partners 2009 disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F4: (Continued from footnote 3) In the Conversion, the 3,808,891 shares of Seed Series Convertible Preferred Stock, 1,636,386 shares of Series A Convertible Preferred Stock, 326,711 shares of Series C Convertible Preferred Stock, 348,609 shares of Series D Convertible Preferred Stock, 485,582 shares of Series E Convertible Preferred Stock, 492,291 shares of Series F Convertible Preferred Stock and 119,445 shares of Series G Convertible Preferred Stock held by BCV Fund 2009 automatically converted into an aggregate of 7,217,915 shares of Common Stock. Following the Conversion, BCV Fund 2009 held 7,644,627 shares of Common Stock, which were automatically reclassified into 7,644,627 shares of Class A Common Stock in the Reclassification.

F5: In the Conversion, the 151,354 shares of Seed Series Convertible Preferred Stock, 41,336 shares of Series A Convertible Preferred Stock, 40,712 shares of Series C Convertible Preferred Stock, 43,440 shares of Series D Convertible Preferred Stock, 60,508 shares of Series E Convertible Preferred Stock, 61,344 shares of Series F Convertible Preferred Stock and 14,884 shares of Series G Convertible Preferred Stock held by BCIP Venture Associates ("BCIP Venture"), whose managing partner is Boylston Coinvestors, LLC ("Boylston"), automatically converted into an aggregate of 413,578 shares of Common Stock. Following the Conversion, BCIP Venture held 466,750 shares of Common Stock, which were automatically reclassified into 466,750 shares of Class A Common Stock in the Reclassification.

F6: In the Conversion, the 31,755 shares of Seed Series Convertible Preferred Stock, 13,453 shares of Series A Convertible Preferred Stock, 2,946 shares of Series C Convertible Preferred Stock, 3,144 shares of Series D Convertible Preferred Stock, 4,379 shares of Series E Convertible Preferred Stock, 4,439 shares of Series F Convertible Preferred Stock and 1,077 shares of Series G Convertible Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B" and, together with BCV Fund 2009 and BCIP Venture, the "Bain Capital Venture Entities"), whose managing partner is Boylston, automatically converted into an aggregate of 61,193 shares of Common Stock. Following the Conversion, BCIP Venture-B held 65,041 shares of Common Stock, which were automatically reclassified into 65,041 shares of Class A Common Stock in the Reclassification.

F7: The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal. As a result, BCVI and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Venture Entities. BCVI and Messrs. Salem and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.

Row 15 · 2021-10-29 · Conversion · Disposed 558,074 · Balance 0

F1: Each share of Seed Series, Series A, Series C, Series D, Series E, Series F and Series G Convertible Preferred Stock automatically converted into Common Stock on a 1-for-1 basis immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). These shares had no expiration date.

F3: Bain Capital Venture Investors, LLC ("BCVI") is the general partner of Bain Capital Venture Partners 2009, L.P. ("BCV Partners 2009"), which is the general partner of Bain Capital Venture Fund 2009, L.P. ("BCV Fund 2009"). As a result, BCV Partners 2009 may be deemed to share voting and dispositive power with respect to the securities held by BCV Fund 2009. BCV Partners 2009 disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F4: (Continued from footnote 3) In the Conversion, the 3,808,891 shares of Seed Series Convertible Preferred Stock, 1,636,386 shares of Series A Convertible Preferred Stock, 326,711 shares of Series C Convertible Preferred Stock, 348,609 shares of Series D Convertible Preferred Stock, 485,582 shares of Series E Convertible Preferred Stock, 492,291 shares of Series F Convertible Preferred Stock and 119,445 shares of Series G Convertible Preferred Stock held by BCV Fund 2009 automatically converted into an aggregate of 7,217,915 shares of Common Stock. Following the Conversion, BCV Fund 2009 held 7,644,627 shares of Common Stock, which were automatically reclassified into 7,644,627 shares of Class A Common Stock in the Reclassification.

F5: In the Conversion, the 151,354 shares of Seed Series Convertible Preferred Stock, 41,336 shares of Series A Convertible Preferred Stock, 40,712 shares of Series C Convertible Preferred Stock, 43,440 shares of Series D Convertible Preferred Stock, 60,508 shares of Series E Convertible Preferred Stock, 61,344 shares of Series F Convertible Preferred Stock and 14,884 shares of Series G Convertible Preferred Stock held by BCIP Venture Associates ("BCIP Venture"), whose managing partner is Boylston Coinvestors, LLC ("Boylston"), automatically converted into an aggregate of 413,578 shares of Common Stock. Following the Conversion, BCIP Venture held 466,750 shares of Common Stock, which were automatically reclassified into 466,750 shares of Class A Common Stock in the Reclassification.

F6: In the Conversion, the 31,755 shares of Seed Series Convertible Preferred Stock, 13,453 shares of Series A Convertible Preferred Stock, 2,946 shares of Series C Convertible Preferred Stock, 3,144 shares of Series D Convertible Preferred Stock, 4,379 shares of Series E Convertible Preferred Stock, 4,439 shares of Series F Convertible Preferred Stock and 1,077 shares of Series G Convertible Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B" and, together with BCV Fund 2009 and BCIP Venture, the "Bain Capital Venture Entities"), whose managing partner is Boylston, automatically converted into an aggregate of 61,193 shares of Common Stock. Following the Conversion, BCIP Venture-B held 65,041 shares of Common Stock, which were automatically reclassified into 65,041 shares of Class A Common Stock in the Reclassification.

F7: The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal. As a result, BCVI and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Venture Entities. BCVI and Messrs. Salem and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.

Row 16 · 2021-10-29 · Conversion · Disposed 135,406 · Balance 0

F1: Each share of Seed Series, Series A, Series C, Series D, Series E, Series F and Series G Convertible Preferred Stock automatically converted into Common Stock on a 1-for-1 basis immediately prior to the closing of the Issuer's initial public offering (the "Conversion"). These shares had no expiration date.

F3: Bain Capital Venture Investors, LLC ("BCVI") is the general partner of Bain Capital Venture Partners 2009, L.P. ("BCV Partners 2009"), which is the general partner of Bain Capital Venture Fund 2009, L.P. ("BCV Fund 2009"). As a result, BCV Partners 2009 may be deemed to share voting and dispositive power with respect to the securities held by BCV Fund 2009. BCV Partners 2009 disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

F4: (Continued from footnote 3) In the Conversion, the 3,808,891 shares of Seed Series Convertible Preferred Stock, 1,636,386 shares of Series A Convertible Preferred Stock, 326,711 shares of Series C Convertible Preferred Stock, 348,609 shares of Series D Convertible Preferred Stock, 485,582 shares of Series E Convertible Preferred Stock, 492,291 shares of Series F Convertible Preferred Stock and 119,445 shares of Series G Convertible Preferred Stock held by BCV Fund 2009 automatically converted into an aggregate of 7,217,915 shares of Common Stock. Following the Conversion, BCV Fund 2009 held 7,644,627 shares of Common Stock, which were automatically reclassified into 7,644,627 shares of Class A Common Stock in the Reclassification.

F5: In the Conversion, the 151,354 shares of Seed Series Convertible Preferred Stock, 41,336 shares of Series A Convertible Preferred Stock, 40,712 shares of Series C Convertible Preferred Stock, 43,440 shares of Series D Convertible Preferred Stock, 60,508 shares of Series E Convertible Preferred Stock, 61,344 shares of Series F Convertible Preferred Stock and 14,884 shares of Series G Convertible Preferred Stock held by BCIP Venture Associates ("BCIP Venture"), whose managing partner is Boylston Coinvestors, LLC ("Boylston"), automatically converted into an aggregate of 413,578 shares of Common Stock. Following the Conversion, BCIP Venture held 466,750 shares of Common Stock, which were automatically reclassified into 466,750 shares of Class A Common Stock in the Reclassification.

F6: In the Conversion, the 31,755 shares of Seed Series Convertible Preferred Stock, 13,453 shares of Series A Convertible Preferred Stock, 2,946 shares of Series C Convertible Preferred Stock, 3,144 shares of Series D Convertible Preferred Stock, 4,379 shares of Series E Convertible Preferred Stock, 4,439 shares of Series F Convertible Preferred Stock and 1,077 shares of Series G Convertible Preferred Stock held by BCIP Venture Associates-B ("BCIP Venture-B" and, together with BCV Fund 2009 and BCIP Venture, the "Bain Capital Venture Entities"), whose managing partner is Boylston, automatically converted into an aggregate of 61,193 shares of Common Stock. Following the Conversion, BCIP Venture-B held 65,041 shares of Common Stock, which were automatically reclassified into 65,041 shares of Class A Common Stock in the Reclassification.

F7: The governance, investment strategy and decision-making process with respect to the investments held by the Bain Capital Venture Entities is directed by the Executive Committee of BCVI, which consists of Enrique Salem and Ajay Agarwal. As a result, BCVI and Messrs. Salem and Agarwal may be deemed to share voting and dispositive power with respect to the securities held by the Bain Capital Venture Entities. BCVI and Messrs. Salem and Agarwal disclaim beneficial ownership of such securities except to the extent of their pecuniary interest therein.