Datadog, Inc. — Director's Dealing 2021

Mar 3, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Datadog, Inc. (DDOG)
CIK: 0001561550
Period of Report: 2021-03-01

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-03-01	Class A Common Stock	C	199664	—	Acquired	199664	Indirect
2021-03-01	Class A Common Stock	S	40828	$95.1828	Disposed	158836	Indirect
2021-03-01	Class A Common Stock	S	46479	$96.0064	Disposed	112357	Indirect
2021-03-01	Class A Common Stock	S	104318	$97.1567	Disposed	8039	Indirect
2021-03-01	Class A Common Stock	S	8039	$97.7212	Disposed	0	Indirect
2021-03-01	Class A Common Stock	C	52400	—	Acquired	52400	Indirect
2021-03-01	Class A Common Stock	S	8009	$95.2146	Disposed	44391	Indirect
2021-03-01	Class A Common Stock	S	12556	$96.0279	Disposed	31835	Indirect
2021-03-01	Class A Common Stock	S	29224	$97.2246	Disposed	2611	Indirect
2021-03-01	Class A Common Stock	S	2611	$97.7296	Disposed	0	Indirect
2021-03-01	Class A Common Stock	C	50000	—	Acquired	50000	Indirect
2021-03-01	Class A Common Stock	S	7260	$95.1959	Disposed	42740	Indirect
2021-03-01	Class A Common Stock	S	12056	$96.0059	Disposed	30684	Indirect
2021-03-01	Class A Common Stock	S	27723	$97.216	Disposed	2961	Indirect
2021-03-01	Class A Common Stock	S	2961	$97.7189	Disposed	0	Indirect
2021-03-01	Class A Common Stock	C	50000	—	Acquired	50000	Indirect
2021-03-01	Class A Common Stock	S	6911	$95.165	Disposed	43089	Indirect
2021-03-01	Class A Common Stock	S	12318	$95.9874	Disposed	30771	Indirect
2021-03-01	Class A Common Stock	S	27975	$97.2205	Disposed	2796	Indirect
2021-03-01	Class A Common Stock	S	2796	$97.7242	Disposed	0	Indirect
2021-03-02	Class A Common Stock	C	117336	—	Acquired	117336	Indirect
2021-03-02	Class A Common Stock	S	43027	$93.6374	Disposed	74309	Indirect
2021-03-02	Class A Common Stock	S	39701	$94.8699	Disposed	34608	Indirect
2021-03-02	Class A Common Stock	S	17499	$95.7993	Disposed	17109	Indirect
2021-03-02	Class A Common Stock	S	11997	$96.7078	Disposed	5112	Indirect
2021-03-02	Class A Common Stock	S	3612	$97.4619	Disposed	1500	Indirect
2021-03-02	Class A Common Stock	S	1500	$98.49	Disposed	0	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-03-01	Class B Common Stock	$	C	199664	Disposed		Class A Common Stock (199664)	Indirect
2021-03-01	Class B Common Stock	$	C	52400	Disposed		Class A Common Stock (52400)	Indirect
2021-03-01	Class B Common Stock	$	C	50000	Disposed		Class A Common Stock (50000)	Indirect
2021-03-01	Class B Common Stock	$	C	50000	Disposed		Class A Common Stock (50000)	Indirect
2021-03-02	Class B Common Stock	$	C	117336	Disposed		Class A Common Stock (117336)	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 $94.64 to $95.63. 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 $95.64 to $96.63. 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 $96.64 to $97.62. 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.

F7: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $97.64 to $97.86. 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.

F8: Shares are held by the Alexis Le-Quoc 2016 GRAT.

F9: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $94.64 to $95.63. 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: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $95.64 to $96.63. 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.

F11: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $96.64 to $97.63. 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 $97.64 to $97.90. 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: 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.

F14: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $94.62 to $95.61. 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.

F15: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $95.62 to $96.61. 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.

F16: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $96.62 to $97.61. 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.

F17: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $97.62 to $97.89. 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.

F18: 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.

F19: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $94.58 to $95.57. 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.

F20: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $95.58 to $96.56. 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.

F21: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $96.62 to $97.61. 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.

F22: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $97.62 to $97.90. 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 $93.26 to $94.25. 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 $94.26 to $95.25. 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 $95.26 to $96.22. 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 $96.26 to $97.24. 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.

F27: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $97.28 to $97.82. 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.