U.S. Data Center REIT Soars 5% After Earnings Report: How Much Did They Earn?

Iron Mountain Inc. (NYSE: IRM) surged 5.75% to close at $106 on the New York Stock Exchange. In a single day, its market capitalization rose by about $1.9 billion (roughly KRW 2.5 trillion), lifting its total value to approximately $31.3 billion (around KRW 42 trillion).

In its fourth‐quarter 2025 earnings release, the company reported record quarterly revenue of about $1.84 billion and annual revenue of roughly $6.9 billion, with adjusted FFO and AFFO beating market expectations. Its data center, digital and asset lifecycle management businesses each grew by more than 40% in the quarter, delivering five consecutive years of record highs in revenue, adjusted EBITDA and AFFO. For 2026, Iron Mountain forecast double‐digit revenue and earnings growth, and announced a quarterly dividend of approximately $0.86 per share (mid‐$3 range annualized).

Founded as a paper document and physical records storage provider, Iron Mountain has grown into an information management and data center REIT serving over 240,000 corporate clients in 61 countries—including about 95% of the Fortune 1000. Leveraging stable rental income from its traditional storage and warehousing operations, the company has rapidly expanded its data center and digital transformation services, earning recognition as an infrastructure beneficiary in the AI era.