X0306 4 2020-08-03 0 0001561550 Datadog, Inc. DDOG 0001783984 Le-Quoc Alexis C/O DATADOG, INC. 620 8TH AVENUE, 45TH FLOOR NEW YORK NY 10018 1 1 0 0 President & CTO Class A Common Stock 2020-08-03 4 C 0 225800 A 225800 I By Trust Class A Common Stock 2020-08-03 4 S 0 99332 94.2802 D 126468 I By Trust Class A Common Stock 2020-08-03 4 S 0 99872 95.2845 D 26596 I By Trust Class A Common Stock 2020-08-03 4 S 0 26596 96.0572 D 0 I By Trust Class A Common Stock 2020-08-03 4 C 0 58400 A 58400 I By GRAT Class A Common Stock 2020-08-03 4 S 0 25675 94.2809 D 32725 I By GRAT Class A Common Stock 2020-08-03 4 S 0 25518 95.2862 D 7207 I By GRAT Class A Common Stock 2020-08-03 4 S 0 7207 96.0484 D 0 I By GRAT Class A Common Stock 2020-08-03 4 C 0 50000 A 50000 I By Trust Class A Common Stock 2020-08-03 4 S 0 22052 94.2824 D 27948 I By Trust Class A Common Stock 2020-08-03 4 S 0 21758 95.2843 D 6190 I By Trust Class A Common Stock 2020-08-03 4 S 0 6190 96.0393 D 0 I By Trust Class A Common Stock 2020-08-03 4 C 0 50000 A 50000 I By Trust Class A Common Stock 2020-08-03 4 S 0 22772 94.2923 D 27228 I By Trust Class A Common Stock 2020-08-03 4 S 0 21463 95.307 D 5765 I By Trust Class A Common Stock 2020-08-03 4 S 0 5765 96.0607 D 0 I By Trust Class A Common Stock 117262 D Class B Common Stock 2020-08-03 4 C 0 225800 0.00 D Class B Common Stock 225800 12372945 I By Trust Class B Common Stock 2020-08-03 4 C 0 58400 0.00 D Class B Common Stock 58400 3198969 I By GRAT Class B Common Stock 2020-08-03 4 C 0 50000 0.00 D Class B Common Stock 50000 337500 I By Trust Class B Common Stock 2020-08-03 4 C 0 50000 0.00 D Class B Common Stock 50000 337500 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 are held by the Alexis Le-Quoc Revocable Trust. 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 $93.73 to $94.72. 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 $94.73 to $95.72. 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 $95.74 to $96.58. 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 Alexis Le-Quoc 2016 GRAT. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $93.73 to $94.72. 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 $94.73 to $95.72. 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 $95.74 to $96.58. 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 Offbeat Polymath 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 7, 2019. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $93.73 to $94.72. 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 $94.73 to $95.72. 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 $95.74 to $96.58. 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 Endearing Viceroy Trust. Reporting Person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest, if any, in the shares. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $93.76 to $94.75. 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 $94.76 to $95.75. 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 $95.76 to $96.58. 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. Alexis Le-Quoc, by /s/ Ron A. Metzger, Attorney-in-Fact 2020-08-05