Iron Mountain Inc vs National Grid Transco PLC National Grid PLC (NEW) American Depositary Shares — how do they compare? Iron Mountain Inc trades at $111.23 (market cap $34.12B), while National Grid Transco PLC National Grid PLC (NEW) American Depositary Shares trades at $79.82 (market cap $78.25B). The key difference: National Grid Transco PLC National Grid PLC (NEW) American Depositary Shares is far larger — about 2.3× Iron Mountain Inc's market cap, and National Grid Transco PLC National Grid PLC (NEW) American Depositary Shares pays the higher dividend (4.14%). Which is the better fit depends on your goals.
| IRM | NGG | |
|---|---|---|
Market Cap | $34.12B | $78.25B |
Volume | 1,143,756 | 1,070,031 |
Sector | Real Estate | Utilities |
52-Week High | $133.06 | $93.93 |
52-Week Low | $78.86 | $73.54 |
Typical Hold Time | 80 Days | — |
Enterprise Value | $53.53B | $136.28B |
Dividend Yield | 3.02% | 4.14% |
Signals from Pluang's Aura AI — not financial advice
Iron Mountain (IRM) trades at $110.86, down 3.68% on the day, amid a neutral technical signal. The company shows steady revenue growth, with 2025 revenue at $6.90B and a net income margin of 5.54%, though profitability has been volatile. Recent news highlights expansion in data centers and digital solutions, with a 300MW pipeline target. Analyst consensus is bullish with a $142.75 price target, but high debt levels and negative shareholder equity pose fundamental concerns.
The outlook for IRM is mixed; growth in digital and data center services offers upside, supported by strong analyst buy ratings. However, elevated valuation multiples, significant debt burden, and inconsistent earnings present risks. Investors should weigh the growth potential against financial leverage and margin pressures when considering a position.
National Grid (NGG) trades at $78.23, up 1.44% on the day, with a market cap of approximately $48.3 billion. The stock shows stable technicals near its consensus price target of $79.25. Fundamentally, it maintains strong profitability with an 18.32% net income margin and has beaten EPS estimates in recent quarters. Recent news highlights institutional buying and a focus on grid innovation, including AI adoption.
Outlook is cautiously positive with upside to the high target of $85.50, supported by earnings momentum and strategic investments. Risks include high debt levels and regulatory pressures. Analyst consensus leans buy (55%), but hold ratings reflect concerns over capital intensity and macroeconomic sensitivity.
Trailing returns across standard periods
Iron Mountain Inc is a record management services provider. The firm is organized as a REIT. Most of its revenue comes from its storage business, with the rest coming from value-added services. The firm primarily caters to enterprise clients in developed markets. Its business segments include Global RIM Business
Read more on IRM →National Grid plc is a British utility company that owns and operates electricity and gas transmission networks in Great Britain, and through its US Regulated business, operates electricity and gas transmission and distribution networks serving customers in New York and Massachusetts. Its shares trade on the NYSE as American Depositary Shares under the ticker NGG.
Read more on NGG →