Datadog, Inc. 4

Julie Richardson of Datadog, Inc. exercised options into Class B shares, converted them into Class A shares, and sold 5,625 Class A shares for about $1.24 million under a 10b5-1 plan.

On September 3, 2026, Datadog, Inc. insider Julie Richardson executed a routine option-related and share-class conversion transaction paired with a pre-planned sale under a Rule 10b5-1 plan. She exercised a stock option for 5,625 shares of Class B Common Stock at an exercise price of $7.9567 per share (aggregate cost of approximately $44,745), and those 5,625 Class B shares—each convertible 1:1 into Class A—were converted into 5,625 shares of Class A Common Stock with no additional consideration. On the same date, she sold 5,625 shares of Class A Common Stock at $220 per share, for total sale proceeds of approximately $1,237,500, leaving her with direct ownership of 3,178 shares of Class A Common Stock and 22,503 shares of Class B Common Stock. The sale was fully covered by the option exercise and conversion (a “cashless” style economic outcome), and is characterized as part of a pre-established trading plan, suggesting a more mechanical liquidity and diversification move rather than a discretionary, opportunistic sale.

Filing Facts

CIK

1561550

Ticker

DDOG

Form

4

Source Type

sec

Accession

0001561550-26-000304

Alert Tier

9