X0306 4 2022-02-07 0 0001561550 Datadog, Inc. DDOG 0001783990 Pomel Olivier C/O DATADOG, INC. 620 8TH AVENUE, 45TH FLOOR NEW YORK NY 10018 1 1 0 0 Chief Executive Officer Class A Common Stock 2022-02-07 4 C 0 36368 0.00 A 278034 D Class A Common Stock 2022-02-07 4 S 0 3600 151.4083 D 274434 D Class A Common Stock 2022-02-07 4 S 0 14303 152.1692 D 260131 D Class A Common Stock 2022-02-07 4 S 0 5627 153.1615 D 254504 D Class A Common Stock 2022-02-07 4 S 0 1926 154.4096 D 252578 D Class A Common Stock 2022-02-07 4 S 0 3028 155.3908 D 249550 D Class A Common Stock 2022-02-07 4 S 0 3383 156.3815 D 246167 D Class A Common Stock 2022-02-07 4 S 0 1701 157.1606 D 244466 D Class A Common Stock 2022-02-07 4 S 0 200 158.135 D 244266 D Class A Common Stock 2022-02-07 4 S 0 800 159.5263 D 243466 D Class A Common Stock 2022-02-07 4 S 0 1700 160.7724 D 241766 D Class A Common Stock 2022-02-07 4 S 0 100 161.28 D 241666 D Class A Common Stock 2022-02-07 4 C 0 15188 0.00 A 16508 I By GRAT Class A Common Stock 2022-02-07 4 S 0 1143 151.3963 D 15365 I By GRAT Class A Common Stock 2022-02-07 4 S 0 6286 152.1629 D 9079 I By GRAT Class A Common Stock 2022-02-07 4 S 0 2414 153.0989 D 6665 I By GRAT Class A Common Stock 2022-02-07 4 S 0 900 154.32 D 5765 I By GRAT Class A Common Stock 2022-02-07 4 S 0 1300 155.4462 D 4465 I By GRAT Class A Common Stock 2022-02-07 4 S 0 1700 156.5329 D 2765 I By GRAT Class A Common Stock 2022-02-07 4 S 0 300 157.24 D 2465 I By GRAT Class A Common Stock 2022-02-07 4 S 0 200 158.965 D 2265 I By GRAT Class A Common Stock 2022-02-07 4 S 0 369 160.2037 D 1896 I By GRAT Class A Common Stock 2022-02-07 4 S 0 576 161.0649 D 1320 I By GRAT Class B Common Stock 2022-02-07 4 C 0 36368 0.00 D Class A Common Stock 36368 8160382 D Class B Common Stock 2022-02-07 4 C 0 15188 0.00 D Class A Common Stock 15188 3279180 I By GRAT Each share of Class B Common Stock is convertible into an equal number of shares of Class A Common Stock at any time, at the holder's election, 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 nine-month anniversary of 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. Shares sold pursuant to a 10b5-1 plan entered into on June 14, 2021. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $150.75 to $151.72. 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 $151.75 to $152.74. 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 $152.77 to $153.64. 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 $153.80 to $154.72. 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 $154.85 to $155.84. 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 $155.85 to $156.80. 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 $156.87 to $157.73. 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 $158.13 to $158.14. 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 $159.15 to $160.07. 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 $160.275 to $161.25 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. Shares are held by the Olivier Pomel 2018 GRAT. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $150.75 to $151.73. 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 $151.75 to $152.74. 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 $152.76 to $153.72. 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 $153.80 to $154.68. 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 $155.00 to $155.88. 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 $156.02 to $156.99. 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 $157.02 to $157.55. 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 $158.64 to $159.29. 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 $159.73 to $160.50. 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 $160.77 to $161.45. 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. Olivier Pomel, by /s/ Ron A. Metzger, Attorney-in-Fact 2022-02-09