Datadog (DDOG) Q2 2026: Revenue +36%, Operating Margin 0.5%, and a Q3 Guide to 28%

All balance sheet, income statement and cash flow figures below are from Datadog's Form 10-Q for the quarterly period ended June 30, 2026, as filed with the SEC. Customer counts, ARR percentages, non-GAAP measures and guidance are from the company's Q2 2026 earnings release and call. Growth rates for periods before 2025 are from prior filings, not this one.

Datadog is growing faster at a $4.5 billion run-rate than it was two years ago at a materially smaller scale — revenue rose 35.6% to $1.12 billion, against 32.2% in Q1 2026. But the return to GAAP profitability is thinner than the net income line implies: operating income was $5.5 million, a 0.49% margin, and $46.3 million of the $51.7 million in pre-tax income was net other income — chiefly $50.6 million of interest earned on the company's $4.55 billion marketable securities portfolio ($4.99 billion including cash), net of $3.3 million of interest expense and a $1.0 million other loss. Nearly 90% of Datadog's pre-tax income — and more than 100% of its after-tax net income — is a treasury outcome, not an operating one.

And that treasury engine is not growing. Interest income of $50.6 million was slightly below the $50.8 million earned in Q2 2025, and $99.8 million for the half against $101.5 million — a 1.7% decline — even as the portfolio itself grew 11.4% over six months. Datadog is earning less on more money, which means reinvestment yields are falling faster than the balance is rising. The line that currently supplies the entire bottom line is a decaying one.