Datadog, Inc. — Director's Dealing 2021

Apr 7, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Datadog, Inc. (DDOG)
CIK: 0001561550
Period of Report: 2021-04-05

Reporting Person: Le-Quoc Alexis (Director, President & CTO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-04-05	Class A Common Stock	C	237750	—	Acquired	237750	Indirect
2021-04-05	Class A Common Stock	S	65046	$82.3242	Disposed	172704	Indirect
2021-04-05	Class A Common Stock	S	127588	$83.1137	Disposed	45116	Indirect
2021-04-05	Class A Common Stock	S	25875	$84.0281	Disposed	19241	Indirect
2021-04-05	Class A Common Stock	S	7335	$85.4115	Disposed	11906	Indirect
2021-04-05	Class A Common Stock	S	9106	$85.9274	Disposed	2800	Indirect
2021-04-05	Class A Common Stock	S	700	$87.1686	Disposed	2100	Indirect
2021-04-05	Class A Common Stock	S	2100	$87.80	Disposed	0	Indirect
2021-04-05	Class A Common Stock	C	39300	—	Acquired	39300	Indirect
2021-04-05	Class A Common Stock	S	11776	$82.3342	Disposed	27524	Indirect
2021-04-05	Class A Common Stock	S	19866	$83.1112	Disposed	7658	Indirect
2021-04-05	Class A Common Stock	S	4658	$84.0248	Disposed	3000	Indirect
2021-04-05	Class A Common Stock	S	2100	$85.5652	Disposed	900	Indirect
2021-04-05	Class A Common Stock	S	800	$86.0925	Disposed	100	Indirect
2021-04-05	Class A Common Stock	S	100	$87.81	Disposed	0	Indirect
2021-04-05	Class A Common Stock	C	37500	—	Acquired	37500	Indirect
2021-04-05	Class A Common Stock	S	11736	$82.349	Disposed	25764	Indirect
2021-04-05	Class A Common Stock	S	19488	$83.1504	Disposed	6276	Indirect
2021-04-05	Class A Common Stock	S	3501	$84.1056	Disposed	2775	Indirect
2021-04-05	Class A Common Stock	S	2100	$85.6239	Disposed	675	Indirect
2021-04-05	Class A Common Stock	S	600	$86.1625	Disposed	75	Indirect
2021-04-05	Class A Common Stock	S	75	$87.86	Disposed	0	Indirect
2021-04-05	Class A Common Stock	C	37500	—	Acquired	37500	Indirect
2021-04-05	Class A Common Stock	S	10723	$82.3137	Disposed	26777	Indirect
2021-04-05	Class A Common Stock	S	19562	$83.1026	Disposed	7215	Indirect
2021-04-05	Class A Common Stock	S	4415	$84.0341	Disposed	2800	Indirect
2021-04-05	Class A Common Stock	S	1000	$85.3631	Disposed	1800	Indirect
2021-04-05	Class A Common Stock	S	1700	$85.9147	Disposed	100	Indirect
2021-04-05	Class A Common Stock	S	100	$86.80	Disposed	0	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-04-05	Class B Common Stock	$	C	237750	Disposed		Class A Common Stock (237750)	Indirect
2021-04-05	Class B Common Stock	$	C	39300	Disposed		Class A Common Stock (39300)	Indirect
2021-04-05	Class B Common Stock	$	C	37500	Disposed		Class A Common Stock (37500)	Indirect
2021-04-05	Class B Common Stock	$	C	37500	Disposed		Class A Common Stock (37500)	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Class A Common Stock	117262	Direct

Footnotes

F1: 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.

F2: Shares are held by the Alexis Le-Quoc Revocable Trust.

F3: Shares sold pursuant to a 10b5-1 plan entered into on September 14, 2020.

F4: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $81.72 to $82.71. 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.

F5: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $82.72 to $83.71. 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.

F6: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $83.72 to $84.71. 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.

F7: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $84.74 to $85.73. 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.

F8: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $85.74 to $86.69. 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.

F9: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $86.77 to $87.70. 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.

F10: Shares are held by the Alexis Le-Quoc 2016 GRAT.

F11: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $82.73 to $83.72. 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.

F12: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $83.73 to $84.68. 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.

F13: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $84.83 to $85.82. 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.

F14: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $85.86 to $86.80. 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.

F15: 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.

F16: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $81.79 to $82.76. 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.

F17: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $82.79 to $83.78. 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.

F18: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $83.83 to $84.75. 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.

F19: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $84.91 to $85.85. 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.

F20: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $85.91 to $86.59. 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.

F21: 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.

F22: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $81.70 to $82.69. 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.

F23: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $82.70 to $83.69. 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.

F24: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $83.71 to $84.67. 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.

F25: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $84.71 to $85.68. 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.

F26: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $85.72 to $86.30. 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.