X0306 4 2019-09-23 0 0001561550 Datadog, Inc. DDOG 0001371755 CONTOUR VENTURE PARTNERS LP 475 PARK AVENUE SOUTH, 6TH FLOOR NEW YORK NY 10016 0 0 1 0 0001634046 Contour Opportunity Fund, L.P. 475 PARK AVENUE SOUTH, 6TH FLOOR NEW YORK NY 10016 0 0 1 0 Common Stock 2019-09-23 4 J 0 600000 0.00 D 0 D Class B Common Stock 2019-09-23 4 J 0 600000 0.00 A Class A Common Stock 600000 600000 D Series Seed Preferred Stock 2019-09-23 4 C 0 1143354 0.00 D Class B Common Stock 1143354 0 D Series A Preferred Stock 2019-09-23 4 C 0 1195020 0.00 D Class B Common Stock 1195020 0 D Series B Preferred Stock 2019-09-23 4 C 0 614448 0.00 D Class B Common Stock 614448 0 D Series C Preferred Stock 2019-09-23 4 C 0 339360 0.00 D Class B Common Stock 339360 0 D Series D Preferred Stock 2019-09-23 4 C 0 43596 0.00 D Class B Common Stock 43596 0 D Class B Common Stock 2019-09-23 4 C 0 3335778 0.00 A Class A Common Stock 3335778 3935778 D Series C Preferred Stock 2019-09-23 4 C 0 1357440 0.00 D Class B Common Stock 1357440 0 D Series D Preferred Stock 2019-09-23 4 C 0 348816 0.00 D Class B Common Stock 348816 0 D Class B Common Stock 2019-09-23 4 C 0 1706256 0.00 A Class A Common Stock 1706256 1706256 D 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. 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. The shares are owned directly by Contour Venture Partners, L.P. The shares are owned directly by Contour Opportunity Fund, L.P. Contour Venture Partners, L.P. by /s/ Matt Gorin, Managing Partner 2019-09-23 Contour Opportunity Fund, L.P., by /s/ Matt Gorin, Managing Partner 2019-09-23