X0306 4 2020-07-06 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 2020-07-06 4 C 0 219200 A 382821 D Class A Common Stock 2020-07-06 4 S 0 72724 88.8604 D 310097 D Class A Common Stock 2020-07-06 4 S 0 24767 89.5168 D 285330 D Class A Common Stock 2020-07-06 4 S 0 44940 90.7061 D 240390 D Class A Common Stock 2020-07-06 4 S 0 74769 91.6572 D 165621 D Class A Common Stock 2020-07-06 4 S 0 2000 92.343 D 163621 D Class A Common Stock 2020-07-06 4 C 0 75000 A 75000 I By GRAT Class A Common Stock 2020-07-06 4 S 0 25196 88.8627 D 49804 I By GRAT Class A Common Stock 2020-07-06 4 S 0 8475 89.559 D 41329 I By GRAT Class A Common Stock 2020-07-06 4 S 0 15447 90.7178 D 25882 I By GRAT Class A Common Stock 2020-07-06 4 S 0 25282 91.6587 D 600 I By GRAT Class A Common Stock 2020-07-06 4 S 0 600 92.39 D 0 I By GRAT Class A Common Stock 2020-07-06 4 C 0 50000 A 50000 I By Trust Class A Common Stock 2020-07-06 4 S 0 16848 88.8646 D 33152 I By Trust Class A Common Stock 2020-07-06 4 S 0 5663 89.5747 D 27489 I By Trust Class A Common Stock 2020-07-06 4 S 0 10904 90.7608 D 16585 I By Trust Class A Common Stock 2020-07-06 4 S 0 16285 91.6882 D 300 I By Trust Class A Common Stock 2020-07-06 4 S 0 300 92.42 D 0 I By Trust Class B Common Stock 2020-07-06 4 C 0 219200 0.00 D Class B Common Stock 219200 12232364 D Class B Common Stock 2020-07-06 4 C 0 75000 0.00 D Class B Common Stock 75000 4181250 I By GRAT Class B Common Stock 2020-07-06 4 C 0 50000 0.00 D Class B Common Stock 50000 387500 I By Trust 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 December 7, 2019. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $88.18 to $89.17. 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 $89.18 to $90.17. 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 $90.18 to $91.17. 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 $91.18 to $92.15. 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 $92.18 to $92.53. 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 $88.20 to $89.19. 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 $89.20 to $90.19. 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 $90.20 to $91.19. 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 $91.20 to $92.18. 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 $92.21 to $92.51. 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 Pomel Descendents' 2018 Trust. Reporting Person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest, if any, in the shares. Shares sold pursuant to a 10b5-1 plan entered into on December 6, 2019. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $88.21 to $89.20. 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 $89.22 to $90.20. 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 $90.24 to $91.23. 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 $91.25 to $92.21. 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 $92.33 to $92.51. 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 2020-07-08