X0306 4 2019-09-23 0 0001561550 Datadog, Inc. DDOG 0001783882 Shah Shardul C/O DATADOG, INC. 620 8TH AVENUE, 45TH FLOOR NEW YORK NY 10018 1 0 0 0 Common Stock 2019-09-23 4 J 0 853776 0.00 D 0 I See footnote Common Stock 2019-09-23 4 J 0 13002 0.00 D 0 I See footnote Class B Common Stock 2019-09-23 4 J 0 853776 0.00 A Class A Common Stock 853776 853776 I See footnote Class B Common Stock 2019-09-23 4 J 0 13002 0.00 A Class A Common Stock 13002 13002 I See footnote Series Seed Preferred Stock 2019-09-23 4 C 0 2897346 0.00 D See footnote 2897346 0 I See footnote Series B Preferred Stock 2019-09-23 4 C 0 221328 0.00 D See footnote 221328 0 I See footnote Series C Preferred Stock 2019-09-23 4 C 0 835680 0.00 D See footnote 835680 0 I See footnote Series D Preferred Stock 2019-09-23 4 C 0 8288724 0.00 D See footnote 8288724 0 I See footnote Class B Common Stock 2019-09-23 4 J 0 12243078 0.00 A Class A Common Stock 13096854 13096854 I See footnote Series A Preferred Stock 2019-09-23 4 C 0 19356168 0.00 D See footnote 19356168 0 I See footnote Series B Preferred Stock 2019-09-23 4 C 0 7259472 0.00 D See footnote 7259472 0 I See footnote Series C Preferred Stock 2019-09-23 4 C 0 10949568 0.00 D See footnote 10949568 0 I See footnote Series D Preferred Stock 2019-09-23 4 C 0 1350528 0.00 D See footnote 1350528 0 I See footnote Class B Common Stock 2019-09-23 4 J 0 38915736 0.00 A Class A Common Stock 38915736 38915736 I See footnote Series A Preferred Stock 2019-09-23 4 C 0 390708 0.00 D See footnote 390708 0 I See footnote Series B Preferred Stock 2019-09-23 4 C 0 146532 0.00 D See footnote 146532 0 I See footnote Series C Preferred Stock 2019-09-23 4 C 0 221016 0.00 D See footnote 221016 0 I See footnote Series D Preferred Stock 2019-09-23 4 C 0 27264 0.00 D See footnote 27264 0 I See footnote Class B Common Stock 2019-09-23 4 J 0 785520 0.00 A Class A Common Stock 785520 785520 I See footnote Series Seed Preferred Stock 2019-09-23 4 C 0 44121 0.00 D See footnote 44121 0 I See footnote Series A Preferred Stock 2019-09-23 4 C 0 249960 0.00 D See footnote 249960 0 I See footnote Series B Preferred Stock 2019-09-23 4 C 0 97104 0.00 D See footnote 97104 0 I See footnote Series C Preferred Stock 2019-09-23 4 C 0 154128 0.00 D See footnote 154128 0 I See footnote Series D Preferred Stock 2019-09-23 4 C 0 143652 0.00 D See footnote 143652 0 I See footnote Class B Common Stock 2019-09-23 4 J 0 688965 0.00 A Class A Common Stock 701967 701967 I See footnote Immediately prior to the closing of the Issuer's initial public offering, each share of Common Stock was reclassified into one share of Class B Common Stock in an exempt transaction pursuant to Rule 16b-7. The shares are held by Index Ventures Growth III (Jersey), L.P. ("Index Growth III"). Index Venture Growth Associates III Limited ("IVGA III") is the managing general partner of Index Growth III. The Reporting Person is a partner within the Index Ventures group. Advisors within the Index Ventures group provide advice to each of Index Growth III, Index Ventures VI (Jersey) L.P. ("Index VI"), and Index Ventures VI Parallel Entrepreneur Fund (Jersey), L.P. ("Index VI Parallel" and together with Index Growth III and Index VI, the "Funds"). The Reporting Person disclaims Section 16 beneficial ownership of these securities, except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for Section 16 or any other purpose. The shares are held by Yucca (Jersey) SLP ("Yucca"). Yucca is the administrator of the Index co-investment vehicles that are contractually required to mirror the relevant Fund's investment in the issuer (in this case, Index Growth III, Index VI and Index VI Parallel). The Reporting Person disclaims Section 16 beneficial ownership of such shares except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that such shares are beneficially owned by him for Section 16 or any other purpose. Each share of Class B Common Stock is convertible at any time at the option of the Reporting Person into one share of Class A Common Stock and has no expiration date. Each share of Class B Common Stock will convert automatically into one share of Class A Common Stock upon the earlier of: (i) any transfer, whether or not for value, except for certain "Permitted Transfers" as defined in the Issuer's amended and restated certificate of incorporation, and (ii) the tenth anniversary of the Issuer's initial public offering of its Class A Common Stock. All shares of Preferred Stock automatically converted into Common Stock on a 1:1 basis and were reclassified into shares of Class B Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering. The shares are held by Index VI. Index Venture Associates VI Limited ("IVA VI") is the managing general partner of Index VI. The Reporting Person disclaims Section 16 beneficial ownership of such shares except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that such shares are beneficially owned by him for Section 16 or any other purpose. The shares are held by Index VI Parallel. IVA VI is the managing general partner of Index VI Parallel. The Reporting Person disclaims Section 16 beneficial ownership of these securities, except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for Section 16 or any other purpose. Shardul Shah, by /s/ Ron A. Metzger, Attorney-in-Fact 2019-09-23