Iron Mountain signed about 102 megawatts of data-center leases in the third quarter, bringing its nine-month total to 137 megawatts, the company disclosed in its November 5 earnings release. The results add evidence of contracted demand while leaving a separate question for property investors: when that capacity starts producing rent.
Companywide revenue reached $1.99 billion, up 13.5% from a year earlier. Iron Mountain raised its full-year revenue outlook to $7.95 billion–$8.02 billion. That range is management guidance, not revenue already earned. Company earnings release filed with the SEC
Signed leases and commenced leases measure different things
The supplemental filing reports 102.492 megawatts of new and expansion leases signed in the quarter, versus 29.229 megawatts of leases that commenced. The Basis calculates that approximately 74.6% of year-to-date signed capacity was contracted in the third quarter, using 102.492 divided by 137.468. The commenced figure covers a separate set of leases; it is not a completion rate for this quarter’s signings. Supplemental information, page 21
Virginia projects show the delivery timetable
Iron Mountain lists two 14-megawatt phases at Northern Virginia’s VA-9 as fully preleased, with expected completion in the fourth quarter of 2026 and first quarter of 2027. Its 48-megawatt RCH-1 development in Richmond has expected completion in early 2028 and no preleased capacity shown in the table. These are company forecasts as of the reporting period. Development schedule, page 23
The Basis’s assessment: signed demand and delivered income should sit on separate lines in an underwriting model. A prelease helps establish a future customer, but the rent-start assumptions still need to match the construction schedule. Comparing projects also requires keeping a fully preleased phase separate from capacity being developed without a signed tenant. The quarterly leasing headline alone cannot establish either project’s timing or return.
Related: Lambda’s Alabama proposal and its remaining approval milestones.
Published by The Basis. Research dates, source references and illustrative assumptions are retained from the original article.



