X0306 4 2020-11-02 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 2020-11-02 4 C 0 126542 A 126542 I By Trust Class A Common Stock 2020-11-02 4 S 0 25908 87.3632 D 100634 I By Trust Class A Common Stock 2020-11-02 4 S 0 69415 88.3015 D 31219 I By Trust Class A Common Stock 2020-11-02 4 S 0 9363 89.1368 D 21856 I By Trust Class A Common Stock 2020-11-02 4 S 0 18552 90.2467 D 3304 I By Trust Class A Common Stock 2020-11-02 4 S 0 3304 91.0928 D 0 I By Trust Class A Common Stock 2020-11-02 4 C 0 51627 A 51627 I By GRAT Class A Common Stock 2020-11-02 4 S 0 10176 87.4595 D 41451 I By GRAT Class A Common Stock 2020-11-02 4 S 0 24480 88.3638 D 16971 I By GRAT Class A Common Stock 2020-11-02 4 S 0 3944 89.2037 D 13027 I By GRAT Class A Common Stock 2020-11-02 4 S 0 10827 90.2412 D 2200 I By GRAT Class A Common Stock 2020-11-02 4 S 0 2200 91.0852 D 0 I By GRAT Class A Common Stock 2020-11-02 4 C 0 49723 A 49723 I By Trust Class A Common Stock 2020-11-02 4 S 0 10200 87.4879 D 39523 I By Trust Class A Common Stock 2020-11-02 4 S 0 22500 88.3754 D 17023 I By Trust Class A Common Stock 2020-11-02 4 S 0 4390 89.192 D 12633 I By Trust Class A Common Stock 2020-11-02 4 S 0 10733 90.2646 D 1900 I By Trust Class A Common Stock 2020-11-02 4 S 0 1900 91.1305 D 0 I By Trust Class A Common Stock 2020-11-02 4 C 0 49609 A 49609 I By Trust Class A Common Stock 2020-11-02 4 S 0 9000 87.4384 D 40609 I By Trust Class A Common Stock 2020-11-02 4 S 0 23100 88.3396 D 17509 I By Trust Class A Common Stock 2020-11-02 4 S 0 5000 89.2104 D 12509 I By Trust Class A Common Stock 2020-11-02 4 S 0 10909 90.2683 D 1600 I By Trust Class A Common Stock 2020-11-02 4 S 0 1600 91.1869 D 0 I By Trust Class A Common Stock 117262 D Class B Common Stock 2020-11-02 4 C 0 126542 0.00 D Class B Common Stock 126542 12076014 I By Trust Class B Common Stock 2020-11-02 4 C 0 51627 0.00 D Class B Common Stock 51627 3103386 I By GRAT Class B Common Stock 2020-11-02 4 C 0 49723 0.00 D Class B Common Stock 49723 250277 I By Trust Class B Common Stock 2020-11-02 4 C 0 49609 0.00 D Class B Common Stock 49609 250391 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 September 14, 2020. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $86.80 to $87.79. 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 $87.80 to $88.78. 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 $88.80 to $89.79. 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 $89.81 to $90.78. 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 $90.87 to $91.56. 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. 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 $86.85 to $87.84. 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 $87.85 to $88.84. 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 $88.86 to $89.72. 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 $89.88 to $90.86. 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 $90.89 to $91.77. 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. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $86.89 to $87.88. 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 $87.89 to $88.88. 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 $88.90 to $89.88. 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 $89.90 to $90.89. 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 $90.90 to $91.62. 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. 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 $86.84 to $87.82. 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 $87.84 to $88.83. 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 $88.88 to $89.87. 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 $89.93 to $90.92. 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 $90.93 to $91.79. 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 2020-11-04