X0306 4 2020-07-16 0 0001561550 Datadog, Inc. DDOG 0001783373 Fougere Dan C/O DATADOG, INC. 620 8TH AVENUE, 45TH FLOOR NEW YORK NY 10018 0 1 0 0 Chief Revenue Officer Class A Common Stock 2020-07-16 4 C 0 757500 0.00 A 910144 D Class A Common Stock 2020-07-16 4 S 0 142025 83.9069 D 768119 D Class A Common Stock 2020-07-16 4 S 0 305170 85.0171 D 462949 D Class A Common Stock 2020-07-16 4 S 0 109700 85.6561 D 353249 D Class A Common Stock 2020-07-16 4 S 0 17833 86.7719 D 335416 D Class A Common Stock 2020-07-16 4 S 0 2772 87.6518 D 332644 D Class A Common Stock 2020-07-17 4 C 0 165000 0.00 A 497644 D Class A Common Stock 2020-07-17 4 S 0 32084 86.045 D 465560 D Class A Common Stock 2020-07-17 4 S 0 89020 86.9545 D 376540 D Class A Common Stock 2020-07-17 4 S 0 43896 87.484 D 332644 D Stock Option (Right to Buy) 0.7958 2020-07-16 4 M 0 577500 0.00 D 2026-12-22 Class B Common Stock 577500 1050649 D Class B Common Stock 2020-07-16 4 M 0 577500 0.00 A Class A Common Stock 577500 757500 D Class B Common Stock 2020-07-16 4 C 0 757500 0.00 D Class A Common Stock 757500 0 D Stock Option (Right to Buy) 0.7958 2020-07-17 4 M 0 165000 0.00 D 2026-12-22 Class B Common Stock 165000 885649 D Class B Common Stock 2020-07-17 4 M 0 165000 0.00 A Class A Common Stock 165000 165000 D Class B Common Stock 2020-07-17 4 C 0 165000 0.00 D Class A Common Stock 165000 0 D 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 earliest 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, (ii) the death of the Reporting Person in the case of shares held directly or in a trustee capacity, and (iii) the tenth anniversary of the Issuer's initial public offering of its Class A Common Stock. Includes 1,293 shares purchased under the Issuer's Employee Stock Purchase Plan on May 15, 2020. Shares sold pursuant to a 10b5-1 plan entered into on December 12, 2019. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $83.41 to $84.40. The reporting person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $84.41 to $85.40. The reporting person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $85.41 to $86.39. The reporting person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $86.41 to $87.40. The reporting person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $87.62 to $87.90. The reporting person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $85.32 to $86.31. The reporting person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $86.32 to $87.31. The reporting person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $87.32 to $87.83. The reporting person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price. Fully vested and exercisable. Dan Fougere, by /s/ Ron A. Metzger, Attorney-in-Fact 2020-07-20