Datadog: Real AI Growth, but a Price That Allows No Hiccups

When Baron Fifth Avenue Growth Fund — one of Datadog's most visible backers — trimmed its stake in the second quarter, it looked like a red flag. It wasn't. The sell was small, and the fund still calls the company a "core long-term holding". The trim is a useful place to start anyway, because it forces the question that actually matters for anyone watching this stock: is Datadog's price already paying for its future growth, or is there still room for the next few quarters to add value?

The trim wasn't the story

Baron sold a little Datadog in Q2 even as the stock became one of the biggest contributors to the fund's 24.6% quarterly gain. The reasoning, as the fund described it, was about price: Datadog and its AI-positioned software peers saw "significant multiple expansion" in the quarter, so this was profit-taking on a winner, with the proceeds shuffled toward AI-infrastructure and healthcare ideas. Call it risk management on a core holding, not a verdict against the business. A $5.2 million trim against a fund that openly describes Datadog as a long-term position is not the kind of trade that makes a case by itself.

A beat strong enough to look like a sell

The business side genuinely did well in the quarter ended June 30. Revenue rose 36% year over year to $1.12 billion; billings grew 38%, and remaining performance obligations — the contracted revenue waiting to be recognized — were up 43% to $3.47 billion. Datadog added large customers, with about 4,720 paying $100,000 or more annually, up 23% from a year ago. Management raised its full-year revenue outlook to roughly $4.45–4.47 billion.

Then the stock fell about 17% the day the numbers came out. That looks absurd until you remember where the price started. Datadog had roughly tripled off its 52-week low and touched about $292 just before the report — a nearly 100% gain over the prior year. At that valuation, a beat with raised guidance was already the base case, not a surprise. "Buy the rumor, sell the fact" is the shorthand for it.

What the price is really asking

Look under the surface and the quarter's details didn't match the elevated price. Q3 revenue guidance implies growth easing to roughly 28–29%, only a modest step up from Q2's $1.12 billion. Free cash flow margin slipped from about 29% to 25%. Gross margin ticked down. And Datadog flagged that its single largest customer reduced usage in the quarter, a hit it deliberately built into its guidance. None of this breaks the thesis. All of it is the opposite of the acceleration investors had been paying for.

That gap is the whole story. Datadog trades at roughly 19 times trailing revenue, against a market value around $79 billion. At that multiple there is no slack: deceleration, a usage cut, or a margin dip — even small and well-explained ones — can move the stock 17% in a single day, and did. Baron's trim is the same judgment applied to a position: a great business and a great stock price are different things.

For a retail investor, the honest read here is neither "buy the dip after a beat" nor "the AI story is broken." The AI sales engine is measurable — billings up 38%, contracted obligations up 43%, and a fast-growing cohort of million-dollar AI customers. But at almost 20 times sales, the burden of proof sits on the next two to four quarters: whether growth holds above the low-30s despite the large-customer usage cut, and whether free cash flow margin stays near 25%. Until the price and the next report agree, this is a company to let report — not one to chase after a 76% run in four months.