Iron Mountain heads into its third-quarter report with a curious disconnect. Management has raised its full-year outlook three straight times, data center leasing exploded over the summer, and asset lifecycle management keeps blowing past targets. Yet the stock has dropped 10.5% since the last report, trailing a roughly flat S&P 500 by nearly 10 percentage points. The November 5 release, due before the open, is a test of whether the market is overly worried about a slowdown or correctly anticipating one.

Wall Street expects adjusted earnings of $1.47 per share on revenue of $1.98 billion. That revenue figure implies growth of about 12.9% from a year ago, still a strong pace but a clear step down from the 19% reported in the second quarter. It also sits below last quarter's $2.03 billion, which makes sense once you recall that roughly $30 million of hyperscaler ALM work was pulled forward into the prior period. On the bottom line, the $1.47 estimate compares with $1.32 a year earlier, about 11% growth. The Earnings Whisper of $1.52 sits about 3% above consensus, a modest but real signal that the expectations bar is higher than the published number suggests. Notably, the full-year consensus of $5.84 in FFO per share remains below the low end of management's raised $5.87 to $5.93 range, so the Street has been slow to fully credit the company's own outlook.

The key operating question is how ALM behaves once the timing benefit washes out. Management lifted its full-year ALM target from $850 million to $950 million to roughly $1.0 billion across three calls, and second-quarter ALM revenue nearly doubled from a year earlier. A third quarter that keeps ALM on pace for that $1.0 billion figure, with enterprise demand still growing robustly, would validate the narrative that this is a durable business rather than a beneficiary of hot memory and component prices. Management acknowledged component pricing was mixed last quarter, so any sign that pricing softness is eating into volumes would challenge the story, as would a reported quarter that looks weak even after adjusting for the pull-forward. The newly closed Group ATF deal in France and Belgium should add a small contribution and offers an early look at how acquisitions fold into the platform.

Data centers provide the other pillar. The company went from 32 megawatts leased at the end of the first quarter to 110 megawatts after a blockbuster July that included a 51-megawatt, 10-year hyperscale lease in Mumbai and a 25-megawatt deal fully leasing London 3. Management said it expects to comfortably exceed its 100-megawatt annual target. Because leasing is lumpy, a quiet third quarter of new signings is not alarming in itself, but commentary on the pipeline and whether segment margins hold near last quarter's 52.2% will matter. Meanwhile, the IRS and Treasury contract, which ramped to about $15 million in the second quarter, should keep climbing toward the more than $100 million expected in 2027. In the legacy records business, margins slipped to 43% on services mix, and a further dip would raise questions about the cash cow funding the growth.

Sentiment has warmed notably, rising to 17.4% bullish from 2.6% ahead of the last report, even as the share price fell. At $115.34, the stock sits just above its 200-day moving average and in the lower portion of its post-earnings range between $107.20 and $130.05, well beneath the prior quarter's peak near $135. That leaves room for relief if results reassure, but little cushion if the 200-day line gives way.

Ultimately, the report hinges on whether Iron Mountain can show that growth decelerating from 19% to the low teens reflects a known timing quirk rather than the start of a broader cooling. A fourth guidance raise, or even a firm reaffirmation alongside steady ALM and data center momentum, would support management's case for compounding double-digit growth. A trimmed ALM outlook would hand the skeptics the evidence they have been pricing in.