Form 4 Filing for Datadog, Inc.

This filing details transactions made by David M. Obstler, Chief Financial Officer of Datadog, Inc. On June 12, 2026, Mr. Obstler was involved in several transactions concerning Class A and Class B Common Stock. Specifically, there was a disposition of 7,500 shares of Class B Common Stock, which is convertible into Class A Common Stock. This disposition resulted in a post-transaction share count of 8,103 shares of Class B Common Stock. Concurrently, there were transactions involving Class A Common Stock: an acquisition of 7,500 shares and a disposition of 7,500 shares, leading to post-transaction holdings of 442,091 shares and 434,591 shares respectively. The Class B shares are held indirectly through trusts for the benefit of Mr. Obstler's children, with conversion into Class A shares triggered by various events including transfer, death, or the tenth anniversary of the company's IPO. These transactions were reported on Form 4.