Datadog, Inc. — Director's Dealing 2021

Jan 6, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Datadog, Inc. (DDOG)
CIK: 0001561550
Period of Report: 2021-01-04

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-01-04	Class A Common Stock	C	317000	—	Acquired	317000	Indirect
2021-01-04	Class A Common Stock	S	178209	$91.3254	Disposed	138791	Indirect
2021-01-04	Class A Common Stock	S	57347	$92.083	Disposed	81444	Indirect
2021-01-04	Class A Common Stock	S	22265	$93.4292	Disposed	59179	Indirect
2021-01-04	Class A Common Stock	S	33012	$94.1633	Disposed	26167	Indirect
2021-01-04	Class A Common Stock	S	20667	$95.3435	Disposed	5500	Indirect
2021-01-04	Class A Common Stock	S	900	$96.4833	Disposed	4600	Indirect
2021-01-04	Class A Common Stock	S	1800	$97.25	Disposed	2800	Indirect
2021-01-04	Class A Common Stock	S	2800	$98.7271	Disposed	0	Indirect
2021-01-04	Class A Common Stock	C	52400	—	Acquired	52400	Indirect
2021-01-04	Class A Common Stock	S	27822	$91.3784	Disposed	24578	Indirect
2021-01-04	Class A Common Stock	S	5480	$92.2067	Disposed	19098	Indirect
2021-01-04	Class A Common Stock	S	5127	$93.5764	Disposed	13971	Indirect
2021-01-04	Class A Common Stock	S	7389	$94.2696	Disposed	6582	Indirect
2021-01-04	Class A Common Stock	S	4882	$95.441	Disposed	1700	Indirect
2021-01-04	Class A Common Stock	S	700	$96.98	Disposed	1000	Indirect
2021-01-04	Class A Common Stock	S	1000	$98.762	Disposed	0	Indirect
2021-01-04	Class A Common Stock	C	50000	—	Acquired	50000	Indirect
2021-01-04	Class A Common Stock	S	26767	$91.3866	Disposed	23233	Indirect
2021-01-04	Class A Common Stock	S	5100	$92.2453	Disposed	18133	Indirect
2021-01-04	Class A Common Stock	S	5482	$93.6351	Disposed	12651	Indirect
2021-01-04	Class A Common Stock	S	6641	$94.347	Disposed	6010	Indirect
2021-01-04	Class A Common Stock	S	4310	$95.4422	Disposed	1700	Indirect
2021-01-04	Class A Common Stock	S	400	$96.4875	Disposed	1300	Indirect
2021-01-04	Class A Common Stock	S	300	$97.30	Disposed	1000	Indirect
2021-01-04	Class A Common Stock	S	1000	$98.728	Disposed	0	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-01-04	Class B Common Stock	$	C	317000	Disposed		Class B Common Stock (317000)	Indirect
2021-01-04	Class B Common Stock	$	C	52400	Disposed		Class B Common Stock (52400)	Indirect
2021-01-04	Class B Common Stock	$	C	50000	Disposed		Class B Common Stock (50000)	Indirect
2021-01-04	Class B Common Stock	$	C	50000	Disposed		Class B Common Stock (50000)	Indirect

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 $90.82 to $91.81. 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 $91.82 to $92.81. 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 $92.82 to $93.81. 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 $93.82 to $94.81. 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 $94.82 to $95.73. 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.

F9: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $95.95 to $96.55. 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 $97.16 to $97.30. 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.

F11: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $98.35 to $98.83. 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.

F12: Shares are held by the Alexis Le-Quoc 2016 GRAT.

F13: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $90.90 to $91.89. 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.

F14: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $91.90 to $92.83. 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.

F15: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $92.91 to $93.90. 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.

F16: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $93.91 to $94.88. 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.

F17: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $94.91 to $95.73. 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.

F18: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $96.55 to $97.30. 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.

F19: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $98.49 to $98.83. 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.

F20: 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.

F21: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $90.91 to $91.90. 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.

F22: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $91.91 to $92.86. 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.

F23: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $92.96 to $93.95. 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.

F24: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $93.96 to $94.92. 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.

F25: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $95.05 to $95.73. 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.

F26: Price reported is a weighted-average sales price. The shares were sold at prices ranging from $96.17 to $97.06. 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: 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.