Datadog CFO David M. Obstler sold 10,000 shares on 2026-09-21 at $241.25 per share, a transaction worth about $2.41 million. The company disclosed that the sale was made under a pre-scheduled Rule 10b5-1 trading plan, which is a written plan insiders use to sell shares at set times to reduce concerns about trading on nonpublic information. This trade matters because a chief financial officer is a senior executive with deep visibility into the company’s financial results, budgeting, and guidance process, so investors often pay attention to CFO stock sales. That said, 10b5-1 plan sales are typically viewed as more routine than discretionary, one-off sales because the timing and terms are set in advance. Looking at recent activity, Datadog has seen at least two insider sales in the last 30 days: Obstler’s $2.41 million sale and a smaller $160,740 sale by Alexis Le-Quoc on 2026-09-23. With no reported insider buys in that window and the CFO sale being plan-driven, the recent pattern reads as normal insider liquidity rather than a clear signal about near-term business conditions.