X0206 3 2019-09-18 0 0001561550 Datadog, Inc. DDOG 0001619710 ICONIQ STRATEGIC PARTNERS II, L.P. C/O ICONIQ CAPITAL 394 PACIFIC AVENUE, 2ND FLOOR SAN FRANCISCO CA 94111 0 0 1 0 0001619682 ICONIQ STRATEGIC PARTNERS II-B, L.P. C/O ICONIQ CAPITAL 394 PACIFIC AVENUE, 2ND FLOOR SAN FRANCISCO CA 94111 0 0 1 0 0001665116 ICONIQ Strategic Partners II Co-Invest, L.P., DD Series C/O ICONIQ CAPITAL 394 PACIFIC AVENUE, 2ND FLOOR SAN FRANCISCO CA 94111 0 0 1 0 0001678064 ICONIQ Strategic Partners III, L.P. C/O ICONIQ CAPITAL 394 PACIFIC AVENUE, 2ND FLOOR SAN FRANCISCO CA 94111 0 0 1 0 0001678109 ICONIQ Strategic Partners III-B, L.P. C/O ICONIQ CAPITAL 394 PACIFIC AVENUE, 2ND FLOOR SAN FRANCISCO CA 94111 0 0 1 0 0001761434 ICONIQ Strategic Partners IV, L.P. C/O ICONIQ CAPITAL 394 PACIFIC AVENUE, 2ND FLOOR SAN FRANCISCO CA 94111 0 0 1 0 0001761522 ICONIQ Strategic Partners IV-B, L.P. C/O ICONIQ CAPITAL 394 PACIFIC AVENUE, 2ND FLOOR SAN FRANCISCO CA 94111 0 0 1 0 0001702932 ICONIQ Strategic Partners II GP, L.P. C/O ICONIQ CAPITAL 394 PACIFIC AVENUE, 2ND FLOOR SAN FRANCISCO CA 94111 0 0 1 0 0001702831 ICONIQ Strategic Partners II TT GP, Ltd C/O ICONIQ CAPITAL 394 PACIFIC AVENUE, 2ND FLOOR SAN FRANCISCO CA 94111 0 0 1 0 0001766963 ICONIQ Strategic Partners III GP, L.P. C/O ICONIQ CAPITAL 394 PACIFIC AVENUE, 2ND FLOOR SAN FRANCISCO CA 94111 0 0 1 0 Common Stock 91461 D Common Stock 97725 D Common Stock 1890426 D Common Stock 3084381 D Series Seed Preferred Stock Common Stock 150852 D Series Seed Preferred Stock Common Stock 118092 D Series Seed Preferred Stock Common Stock 317388 D Series Seed Preferred Stock Common Stock 339132 D Series A Preferred Stock Common Stock 67032 D Series A Preferred Stock Common Stock 52464 D Series B Preferred Stock Common Stock 71688 D Series B Preferred Stock Common Stock 56112 D Series D Preferred Stock Common Stock 11043852 D Series D Preferred Stock Common Stock 8645100 D Series D Preferred Stock Common Stock 4120260 D The Preferred Stock is convertible into Class B Common Stock on a 1:1 basis and has no expiration date. Immediately prior to the closing of the Issuer's initial public offering, (1) all shares of Preferred Stock will be automatically converted into shares of Common Stock on a 1:1 basis and (2) all shares of Common Stock shall then be reclassified into one share of Class B Common Stock on a 1:1 basis. After the completion of the Issuer's initial public offering, on any transfer of shares of Class B common stock, whether or not for value, each such transferred share will automatically convert into one share of Class A common stock, except for certain transfers described in the Issuer's amended and restated certificate of incorporation, including transfers for tax and estate planning purposes, so long as the transferring holder continues to hold sole voting and dispositive power with respect to the shares transferred. Additionally, the shares of Class B common stock will convert automatically into Class A common stock, on a 1:1 basis, upon the tenth anniversary of the Issuer's initial public offering. The shares are held by ICONIQ Strategic Partners III, L.P. ("ICONIQ III"). Iconiq Strategic Partners GP II, L.P. ("ICONIQ GP II") is the sole general partner of each of ICONIQ II, ICONIQ II-B and ICONIQ II Co-Invest. ICONIQ Strategic Partners II TT GP, Ltd. ("ICONIQ Parent GP II") is the sole general partner of ICONIQ GP II. Iconiq Strategic Partners GP III, L.P. ("ICONIQ GP III") is the sole general partner of each of ICONIQ III and ICONIQ III-B. ICONIQ Strategic Partners III TT GP, Ltd. ("ICONIQ Parent GP III") is the sole general partner of ICONIQ GP III. Iconiq Strategic Partners GP IV, L.P. ("ICONIQ GP IV") is the sole general partner of each of ICONIQ IV and ICONIQ IV-B. ICONIQ Strategic Partners IV TT GP, Ltd. ("ICONIQ Parent GP IV") is the sole general partner of ICONIQ GP IV. Divesh Makan ("Makan") and William J.G. Griffith ("Griffith") are the sole equity holders and directors of ICONIQ Parent GP II, ICONIQ Parent GP III and ICONIQ Parent GP IV. Each of ICONIQ GP II, ICONIQ GP III, ICONIQ GP IV, ICONIQ Parent GP II, ICONIQ Parent GP III, ICONIQ Parent GP IV, Makan and Griffith disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), except to the extent of its or his pecuniary interest therein, if any. This report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose. The shares are held by ICONIQ Strategic Partners III-B, L.P. ("ICONIQ III-B"). The shares are held by ICONIQ Strategic Partners IV, LP ("ICONIQ IV"). The shares are held by ICONIQ Strategic Partners IV-B, LP ("ICONIQ IV-B"). The shares are held by ICONIQ Strategic Partners II, LP ("ICONIQ II"). The shares are held by ICONIQ Strategic Partners II-B, LP ("ICONIQ II-B"). The shares are held by ICONIQ Strategic Partners II Co-Invest, L.P., DD Series ("ICONIQ II Co-Invest"). Form 1 of 2 This Form 3 is the first of two Form 3s being filed relating to the same event. The Form 3 has been split into two filings because there are more than 10 Reporting Persons in total, and the SEC's EDGAR filing system limits a single Form 3 to a maximum of 10 Reporting Persons. Each Form 3 will be filed by Designated Filer ICONIQ Strategic Partners II, L.P. ICONIQ Strategic Partners II, L.P., By: ICONIQ Strategic Partners II GP, L.P., its General Partner, By: ICONIQ Strategic Partners II TT GP, Ltd, its General Partner, By: Kevin Foster, its Sr. VP, /s/ Kevin Foster 2019-09-18 ICONIQ Strategic Partners II-B, L.P., By: ICONIQ Strategic Partners II GP, L.P., its General Partner, By: ICONIQ Strategic Partners II TT GP, Ltd., its General Partner, By: Kevin Foster, its Sr. VP, /s/ Kevin Foster 2019-09-18 ICONIQ Strategic Partners II Co-Invest, L.P., By: ICONIQ Strategic Partners II GP, L.P., its General Partner, By: ICONIQ Strategic Partners II TT GP, Ltd., its General Partner, By: Kevin Foster, its Sr. VP, /s/ Kevin Foster 2019-09-18 ICONIQ Strategic Partners III, L.P., By: ICONIQ Strategic Partners III GP, L.P., its General Partner, By: ICONIQ Strategic Partners III TT GP, Ltd., its General Partner, By: Kevin Foster, its Sr. VP, /s/ Kevin Foster 2019-09-18 ICONIQ Strategic Partners III-B, L.P., By: ICONIQ Strategic Partners III GP, L.P., its General Partner, By: ICONIQ Strategic Partners III TT GP, Ltd., its General Partner, By: Kevin Foster, its Sr. VP, /s/ Kevin Foster 2019-09-18 ICONIQ Strategic Partners IV, L.P., By: ICONIQ Strategic Partners IV GP, L.P., its General Partner, By: ICONIQ Strategic Partners IV TT GP, Ltd., its General Partner, By: Kevin Foster, its Authorized Signatory, /s/ Kevin Foster 2019-09-18 ICONIQ Strategic Partners IV-B, L.P., By: ICONIQ Strategic Partners IV GP, L.P., its General Partner, By: ICONIQ Strategic Partners IV TT GP, Ltd., its General Partner, By: Kevin Foster, its Authorized Signatory, /s/ Kevin Foster 2019-09-18 ICONIQ Strategic Partners II GP, L.P., a Cayman Islands exempted limited partnership, By: ICONIQ Strategic Partners II TT GP, Ltd., a Cayman Islands exempted company, its General Partner, /s/ Kevin Foster 2019-09-18 ICONIQ Strategic Partners II TT GP, Ltd., a Cayman Islands exempted company, /s/ Kevin Foster 2019-09-18 ICONIQ Strategic Partners III GP, L.P., a Cayman Islands exempted limited partnership, By: ICONIQ Strategic Partners III TT GP, Ltd., a Cayman Islands exempted company, its, General Partner, By: Kevin Foster, Title: Senior Vice President, /s/ Kevin Foster 2019-09-18