Shares of Iron Mountain plunged 9% to $108.03 on November 5 after the company delivered a paradox: record-breaking third-quarter results paired with fourth-quarter and full-year revenue guidance that fell short of Wall Street expectations. The Q4 revenue outlook of roughly $2.03 billion missed the $2.05 billion consensus, and the full-year midpoint of $7.99 billion trailed analysts' $8.04 billion target. For a stock trading at roughly 85 times trailing earnings, even a small stumble on the outlook can trigger an outsized reaction.
• The Quarter Was Strong — the Problem Is What Comes Next. Adjusted funds from operations (AFFO) — the cash-flow metric that matters most for real estate investment trusts — hit $1.53 per share, beating the $1.48 consensus.
Record adjusted EBITDA of $748 million rose 13.3% year-over-year. But markets are forward-looking machines, and Q4 revenue guidance implied a sequential growth slowdown. That mismatch between past performance and future promise is what spooked investors.
• A Record 102 Megawatts of Data Center Leasing Wasn't Enough to Distract. Data center, digital, and asset lifecycle management businesses collectively grew more than 30% year-over-year, with 137 megawatts of new data center leases signed year-to-date.
CEO Bill Meaney said the company has about 325 megawatts of leasable capacity expected to be energized over 18–24 months — a huge runway. Yet there's a timing gap: leases signed today take quarters to convert into revenue, meaning the guidance shortfall suggests near-term conversion is slower than the market priced in.
• A 15% Dividend Hike Signals Confidence, but the Payout Ratio Raises Eyebrows. Iron Mountain boosted its quarterly dividend to $0.993 per share, a 15% increase.
However, the payout ratio sits at 205% of GAAP earnings — meaning the company pays out more in dividends than it earns under standard accounting. That's common among REITs, which use AFFO rather than net income to measure sustainability, but it leaves little room for error if cash flows decelerate.
• The Broader REIT Sector Rose Today, Isolating This as an IRM-Specific Problem. With peers trading higher, investors can't blame rising interest rates or sector rotation. The sell-off is a pure verdict on the guidance gap — a signal that at a $35 billion market capitalization, the market demands near-flawless execution from Iron Mountain's data center transformation story.