Palantir shares had lost close to a third of their value in 2026 heading into Monday evening, worn down by months of investors questioning whether the AI software trade had gotten ahead of itself. Then the company reported second-quarter earnings after the closing bell on August 3, and the stock jumped as much as 15% in after-hours trading. The number that did most of the work: Palantir's US commercial revenue grew 149% year over year.

Total revenue reached $1.94 billion for the quarter, up 93% from roughly $1 billion a year earlier, comfortably ahead of the $1.80 billion analysts had projected. Adjusted earnings per share came in at 41 cents against a 35-cent estimate. GAAP net income hit $1.07 billion, a 55% margin, compared with $329 million in the same quarter last year.

The Number That Flipped Palantir's Business Model

For most of its history as a public company, Palantir's growth story ran through government contracts, a business built on defense and intelligence work that made it a familiar but polarizing name in Washington. This quarter marks a genuine inflection point in that story. US commercial revenue reached $764 million, up 149% year over year, and now accounts for roughly 48% of Palantir's total revenue, nearly matching the government business that once defined the company entirely. US government revenue itself still grew a healthy 90% to $809 million, meaning this isn't a case of government work slowing down while commercial picks up the slack. Both engines are running hot simultaneously, with total US revenue reaching $1.57 billion, up 115% year over year.

The company's own internal metrics back up the scale of what's happening. Remaining US commercial deal value more than doubled year over year to $6.24 billion. Palantir closed 220 transactions worth over $1 million during the quarter, including a record $2.132 billion in US commercial total contract value in a single three-month period. Net dollar retention, a measure of how much more existing customers are spending compared to a year earlier, reached 150%, meaning Palantir's current customer base alone is expanding its spending by half again, before any new customers are even counted.

What's Actually Driving the Surge

The growth traces back to enterprises integrating their own proprietary business data into custom applications built on Palantir's Foundry and AIP, its Artificial Intelligence Platform. Rather than selling a generic AI chatbot, Palantir's pitch has centered on helping large organizations connect their existing data infrastructure directly into AI-driven workflows, a harder, more resource-intensive sales process than a typical software subscription, but one that appears to be converting into real, durable contract value rather than short-term pilot spending.

Palantir's own combined growth-and-profitability metric, what it calls its Rule of 40 score, a measure that adds revenue growth rate to profit margin, climbed to 155% this quarter, an extraordinarily high figure by software industry standards, where a Rule of 40 score above 40% is typically considered strong.

Karp's Victory Lap Came With a Warning Shot

CEO Alex Karp used the earnings release to make a pointed claim about the company's position in the broader AI industry, saying demand for what he called AI sovereignty has now been unleashed, and framing Palantir as the only company that has demonstrated it can convert AI usage into real, measurable economic value rather than experimental spending. In a separate interview with CNBC, Karp was even more direct about the scale of the quarter, telling reporters that to his knowledge, no business at Palantir's scale has grown half this much.

Notably, Karp also used the moment to take direct aim at frontier AI labs, including Anthropic and OpenAI, warning enterprises against over-relying on foundation model providers rather than building their own durable data infrastructure. That's a pointed positioning move from a company that doesn't build its own frontier AI models, instead building the software layer that lets enterprises apply whichever underlying models they choose to their own proprietary data. Karp's comments amount to a bet that the infrastructure and integration layer, not the model itself, is where lasting enterprise value actually accrues.

Why the Stock Had Fallen Before Tonight

Palantir's rally doesn't erase the skepticism that had built up around the stock through most of 2026. Shares had fallen roughly 29% to 33% year-to-date heading into this report, and more than 40% from their all-time high, driven by persistent concerns that Palantir's valuation had run well ahead of any realistic growth trajectory, even a strong one. Heading into Monday's report, the company was valued at roughly 38.5 times the midpoint of its own 2026 revenue guidance, a multiple that leaves little room for disappointment and explains why options markets had been pricing in a potential 10% swing in either direction around the earnings release.

What the Raised Guidance Actually Signals

Palantir didn't just beat this quarter, it raised its full-year outlook meaningfully. The company now expects 2026 revenue of $8.150 billion to $8.158 billion, up from prior guidance of $7.650 billion to $7.662 billion, an upward revision of roughly $500 million in a single guidance update. US commercial revenue guidance rose to in excess of $3.424 billion, implying at least 134% growth for the full year, up from a prior target of $3.224 billion. For the current quarter, Palantir guided to revenue of $2.160 billion to $2.164 billion.

Raising guidance by this magnitude, on top of an already strong quarter, is typically read as a company signaling genuine confidence in its forward pipeline rather than simply clearing a low bar. Whether that confidence is enough to fully rehabilitate a stock that spent most of 2026 sliding on valuation concerns is a separate question from whether the underlying business is genuinely strengthening. On the second question, at least, Monday's numbers left considerably less room for doubt than they did a quarter ago.