Datadog, Inc. 4

Datadog director Michael James Callahan converted 112,500 Class B shares, sold 114,000 Class A shares for about $26.5 million under a 10b5-1 plan, and received an RSU award of 1,072 Class A shares.

On June 12, 2026, Datadog, Inc. director Michael James Callahan, through The Callahan-Thernstrom Family Trust, converted 112,500 shares of Class B Common Stock into Class A Common Stock and then executed a series of 10b5-1 plan sales totaling 114,000 Class A shares at weighted-average prices between approximately $228.31 and $236.20 per share, generating proceeds of roughly $26.5 million and reducing the trust’s indirect Class A holdings from 127,496 to 14,996 shares. Separately, on June 15, 2026, he received an award of 1,072 Class A shares in the form of RSUs under Datadog’s non-employee director compensation policy, which will vest at the earlier of the next annual shareholder meeting or June 15, 2027, subject to continued service. After these transactions, Callahan, directly and via the trust, reported ownership of 123,042 Class A shares in total, with an estimated aggregate value of about $28.6 million based on the transaction price range.

Filing Facts

CIK

1561550

Ticker

DDOG

Form

4

Source Type

sec

Accession

0001561550-26-000205

Alert Tier

9