X0306 4 2021-11-17 0 0001561550 Datadog, Inc. DDOG 0001540517 Agarwal Amit C/O DATADOG, INC. 620 8TH AVENUE, 45TH FLOOR NEW YORK NY 10018 0 1 0 0 Chief Product Officer Common A Common Stock 2021-11-17 4 C 0 90000 0.00 A 90000 I By Trust Common A Common Stock 2021-11-17 4 S 0 33484 190.1303 D 56516 I By Trust Common A Common Stock 2021-11-17 4 S 0 26786 190.9996 D 29730 I By Trust Common A Common Stock 2021-11-17 4 S 0 12953 191.9585 D 16777 I By Trust Common A Common Stock 2021-11-17 4 S 0 8618 193.0917 D 8159 I By Trust Common A Common Stock 2021-11-17 4 S 0 1374 193.9502 D 6785 I By Trust Common A Common Stock 2021-11-17 4 S 0 1647 194.8673 D 5138 I By Trust Common A Common Stock 2021-11-17 4 S 0 900 196.278 D 4238 I By Trust Common A Common Stock 2021-11-17 4 S 0 2069 197.108 D 2169 I By Trust Common A Common Stock 2021-11-17 4 S 0 2169 198.1883 D 0 I By Trust Common A Common Stock 2021-11-17 4 C 0 90000 0.00 A 90000 I By Trust Common A Common Stock 2021-11-17 4 S 0 34290 190.1468 D 55710 I By Trust Common A Common Stock 2021-11-17 4 S 0 27526 191.042 D 28184 I By Trust Common A Common Stock 2021-11-17 4 S 0 11655 191.9874 D 16529 I By Trust Common A Common Stock 2021-11-17 4 S 0 8055 193.1022 D 8474 I By Trust Common A Common Stock 2021-11-17 4 S 0 1800 194.0569 D 6674 I By Trust Common A Common Stock 2021-11-17 4 S 0 1600 194.9675 D 5074 I By Trust Common A Common Stock 2021-11-17 4 S 0 845 196.25 D 4229 I By Trust Common A Common Stock 2021-11-17 4 S 0 2029 197.116 D 2200 I By Trust Common A Common Stock 2021-11-17 4 S 0 2200 198.2395 D 0 I By Trust Common A Common Stock 2021-11-17 4 C 0 56500 0.00 A 56500 I By LLC Common A Common Stock 2021-11-17 4 S 0 20048 190.111 D 36452 I By LLC Common A Common Stock 2021-11-17 4 S 0 16376 190.9162 D 20076 I By LLC Common A Common Stock 2021-11-17 4 S 0 9579 191.8897 D 10497 I By LLC Common A Common Stock 2021-11-17 4 S 0 5121 193.0476 D 5376 I By LLC Common A Common Stock 2021-11-17 4 S 0 900 193.9322 D 4476 I By LLC Common A Common Stock 2021-11-17 4 S 0 1200 194.8182 D 3276 I By LLC Common A Common Stock 2021-11-17 4 S 0 700 196.2658 D 2576 I By LLC Common A Common Stock 2021-11-17 4 S 0 1276 197.1803 D 1300 I By LLC Common A Common Stock 2021-11-17 4 S 0 1300 198.25 D 0 I By LLC Class B Common Stock 2021-08-17 5 G 0 E 90000 0.00 D Class A Common Stock 90000 123166 I By Spouse Class B Common Stock 2021-08-17 5 G 0 E 90000 0.00 A Class A Common Stock 90000 90000 I By Trust Class B Common Stock 2021-08-17 5 G 0 E 1058365 0.00 D Class A Common Stock 1058365 90000 I By GRAT Class B Common Stock 2021-08-17 5 G 0 E 1058365 0.00 A Class A Common Stock 1058365 1058365 I By Trust Class B Common Stock 2021-08-17 5 G 0 E 90000 0.00 D Class A Common Stock 90000 0 I By GRAT Class B Common Stock 2021-08-17 5 G 0 E 90000 0.00 A Class A Common Stock 90000 90000 I By Trust Class B Common Stock 2021-08-20 5 G 0 E 56500 0.00 D Class A Common Stock 56500 7 D Class B Common Stock 2021-08-20 5 G 0 E 56500 0.00 A Class A Common Stock 56500 56500 I By LLC Class B Common Stock 2021-11-17 4 C 0 90000 0.00 D Class A Common Stock 90000 0 I By Trust Class B Common Stock 2021-11-17 4 C 0 90000 0.00 D Class A Common Stock 90000 0 I By Trust Class B Common Stock 2021-11-17 4 C 0 56500 0.00 D Class A Common Stock 56500 0 I By LLC Class B Common Stock 2021-11-17 4 C 0 2500 0.00 D Class A Common Stock 2500 120666 I By Spouse Class B Common Stock Class A Common Stock 608913 I By GRAT 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. Shares are held directly by Agarwal-Jan Charitable Trust, of which the Reporting Person's spouse is Trustee. Shares sold pursuant to a 10b5-1 plan entered into on September 9, 2021. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $189.60 to $190.57. 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 $190.60 to $191.59. 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 $191.60 to $192.56. 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 $192.60 to $193.55. 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 $193.60 to $194.57. 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 $194.60 to $195.40. 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 $195.64 to $196.625. 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 $196.85 to $197.65. 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 $197.88 to $198.55. 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. Shares are held directly by Agarwal Jan 2021 Spousal Trust, in which the Reporting Person possesses a pecuniary interest. Shares sold pursuant to a 10b5-1 plan entered into on September 10, 2021. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $189.63 to $190.62. 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 $190.63 to $191.62. 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 $191.63 to $192.59. 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 $192.63 to $193.54. 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 $193.63 to $194.62. 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 $194.665 to $195.60. 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 $195.70 to $196.55. 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 $196.92 to $197.57. 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 $197.93 to $198.60. 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 directly by A-J Family Delaware Holdings LLC, in which the Reporting Person possesses a pecuniary interest. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $189.53 to $190.52. 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 $190.53 to $191.52. 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 $191.54 to $192.53. 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. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $192.54 to $193.53. 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. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $193.54 to $194.48. 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 $194.595 to $195.27. 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 $195.63 to $196.55. 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 $196.92 to $197.88. 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 $197.93 to $198.61. 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 Reporting Person's spouse. Shares are held directly by Amit Agarwal 2018 GRAT, of which the Reporting Person is Trustee. Shares are held directly by Agarwal 2018 Family Trust, of which the Reporting Person's spouse is Trustee. Shares are held directly by Amit Agarwal 2019 GRAT, of which the Reporting Person is Trustee. Part 1 of 2. Reporting Person is reporting on two separate Form 4 filings as the aggregate number of line items exceeds the maximum number that can be included in one report. Amit Agarwal, by /s/ Ron A. Metzger, Attorney-in-Fact 2021-11-19