X0508 4 2023-08-22 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 President 1 Common A Common Stock 2023-08-22 4 C 0 112000 0.9092 A 381141 D Common A Common Stock 2023-08-22 4 S 0 79177 93.4246 D 301964 D Common A Common Stock 2023-08-22 4 S 0 30199 94.0808 D 271765 D Common A Common Stock 2023-08-22 4 S 0 2324 95.1908 D 269441 D Common A Common Stock 2023-08-22 4 S 0 300 95.76 D 269141 D Common A Common Stock 2023-08-23 4 C 0 112000 0.9092 A 381141 D Common A Common Stock 2023-08-23 4 S 0 16573 92.9452 D 364568 D Common A Common Stock 2023-08-23 4 S 0 18351 93.7277 D 346217 D Common A Common Stock 2023-08-23 4 S 0 30046 94.8459 D 316171 D Common A Common Stock 2023-08-23 4 S 0 47030 95.5326 D 269141 D Common A Common Stock 1640 I By Trust Common A Common Stock 6541 I By Trust Stock Option (Right to Buy) 0.9092 2023-08-22 4 M 0 200000 0.00 D 2027-10-25 Class B Common Stock 200000 340000 D Class B Common Stock 2023-08-22 4 M 0 200000 0.00 A Class A Common Stock 200000 521107 D Class B Common Stock 2023-08-22 4 C 0 112000 0.00 D Class A Common Stock 112000 409107 D Stock Option (Right to Buy) 0.9092 2023-08-23 4 M 0 200000 0.00 D 2027-10-25 Class B Common Stock 200000 140000 D Class B Common Stock 2023-08-23 4 M 0 200000 0.00 A Class A Common Stock 200000 609107 D Class B Common Stock 2023-08-23 4 C 0 112000 0.00 D Class A Common Stock 112000 497107 D Class B Common Stock Class A Common Stock 603459 I By Trust Class B Common Stock Class A Common Stock 1056725 I By Trust Class B Common Stock Class A Common Stock 95666 I By Spouse 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 sold pursuant to a 10b5-1 plan entered into on May 15, 2023. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $92.71 to $93.70. 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 $93.71 to $94.70. 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 $94.71 to $95.46. 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 $92.29 to $93.28. 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 $93.29 to $94.28. 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 $94.29 to $95.28. 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 $95.29 to $95.95. 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 2018 Family Trust, of which the Reporting Person's spouse is Trustee. Shares are held directly by Agarwal 2019 Family Trust, of which the Reporting Person's spouse is Trustee. Option is fully vested and exercisable. Shares are held by Reporting Person's spouse. Amit Agarwal, by /s/ Ron A. Metzger, Attorney-in-Fact 2023-08-24