Datadog, Inc. 4

Michael James Callahan, through a family trust, converted and sold 12,500 Datadog Class A shares at $287.47 on August 4, 2026 under a 10b5‑1 plan.

On August 4, 2026, reporting person Michael James Callahan, via The Callahan‑Thernstrom Family Trust, converted 12,500 shares of Datadog, Inc. Class B Common Stock into Class A Common Stock at no cost and then sold 12,500 Class A shares at an average price of $287.47 per share pursuant to a pre‑arranged Rule 10b5‑1 trading plan dated March 13, 2026; following these transactions, the trust continued to hold 27,496 Class A shares indirectly and 85,542 Class A shares indirectly (from a separate line), and 20,684 Class A shares directly, reflecting ongoing but reduced ownership while maintaining a substantial stake.

Filing Facts

CIK

1561550

Ticker

DDOG

Form

4

Source Type

sec

Accession

0001561550-26-000256

Alert Tier

8