IRMIron Mountain Inc.

CSNew York Stock Exchange (XNYS)·USD

Identity

Security key: 17236
Ticker: IRM
Type: CS — Common Stock
Exchange: New York Stock Exchange(XNYS)
Venue group: NYSE
Operating MIC: XNYS
Market: stocks
Locale: us
Currency: USD
Listed: 1996-02-01
Round lot: 100
Active: Yes
Last seen in a load: 2026-08-14 20:49
Vendor updated: 2026-08-13 06:09
Ticker root / suffix: IRM

Detail

Enriched 2026-08-14 20:47

Market cap: $37,022,321,700.32
Shares outstanding (class): 297,524,681
Shares outstanding (weighted): 297,702,812
SIC: 6798 REAL ESTATE INVESTMENT TRUSTS
Employees: 29,400
Location: PORTSMOUTH, NH
Homepage: https://www.ironmountain.com
Description: Iron Mountain Inc is an information management services provider organized and operated as a real estate investment trust. The company offers solutions to its clients to address their information management, digital transformation, information security, data center, and asset lifecycle management (ALM) needs. Its customers come from various industries, including commercial, legal, financial, healthcare, technology, etc. The company has two reportable segments: Global Records and Information Management (Global RIM) and Global Data Center. Maximum revenue is generated from the Global RIM segment, which offers data and records management, secure shredding, consumer storage, and other related services. Geographically, the company generates maximum revenue from the United States.

Market cap and share counts drift.

Funds holding this security

349 funds · 363 positions · $6.84B reported value, as of 2026-03-31

All holders →

Fund	Ticker	Position value	% of fund	Balance	Match
VANGUARD TOTAL STOCK MARKET INDEX FUND VANGUARD INDEX FUNDS	VTI	$912.98M	0.05%	8,938,524 NS	FIGI
VANGUARD 500 INDEX FUND VANGUARD INDEX FUNDS	VOO	$767.97M	0.05%	7,518,827 NS	FIGI
VANGUARD MID-CAP INDEX FUND VANGUARD INDEX FUNDS	VO	$619.95M	0.31%	6,069,577 NS	FIGI
iShares Core S&P 500 ETF iShares Trust	IVV	$388.56M	0.05%	3,804,159 NS	FIGI
N/A —	—	$351.18M	0.05%	3,438,226 NS	FIGI
Cohen & Steers Institutional Realty Shares COHEN & STEERS INSTITUTIONAL REALTY SHARES …	—	$315.76M	3.85%	3,091,475 NS	FIGI
Cohen & Steers Realty Shares COHEN & STEERS REALTY SHARES INC	—	$281.98M	3.86%	2,760,718 NS	FIGI
VANGUARD VALUE INDEX FUND VANGUARD INDEX FUNDS	VTV	$265.55M	0.12%	2,599,887 NS	FIGI
State Street(R) Real Estate Select Sector SPDR(… SELECT SECTOR SPDR TRUST	XLRE	$250.20M	3.42%	2,449,532 NS	FIGI
Cohen & Steers Real Estate Securities Fund COHEN & STEERS REAL ESTATE SECURITIES FUND …	—	$237.58M	2.75%	2,326,030 NS	FIGI
VANGUARD MID-CAP GROWTH INDEX FUND VANGUARD INDEX FUNDS	VOT	$218.34M	0.75%	2,137,646 NS	FIGI
VANGUARD INSTITUTIONAL INDEX FUND VANGUARD INSTITUTIONAL INDEX FUNDS	—	$170.33M	0.05%	1,667,662 NS	FIGI
iShares Russell Mid-Cap ETF iShares Trust	IWR	$114.62M	0.24%	1,122,155 NS	FIGI
iShares U.S. Real Estate ETF iShares Trust	IYR	$95.48M	2.40%	934,834 NS	FIGI
State Street(R) SPDR(R) Portfolio S&P 500(R) Hi… SPDR SERIES TRUST	SPYD	$94.22M	1.34%	922,441 NS	FIGI

How positions resolve to the securities master. FIGI_COMPOSITE is exact identifier equality — both sides got the FIGI from Bloomberg. TICKER is a narrow fallback used only where the master row carries no FIGI at all (2,389 rows do not, disproportionately Irish-domiciled US listings like LIN and ACN). Roughly 22% of all positions resolve to the master.

Funds holding this security

Identifiers

master.security_identifier

TICKERIRM
FIGI_COMPOSITEBBG000KCZPC3
FIGI_SHARE_CLASSBBG001SCQ2X1
CIK0001020569
ISINUS46284V1017
Resolved through OpenFIGI from a holdings ISIN, not supplied by the securities vendor.

Identifiers

Classification

classification.v_security_classification

Asset class: Equity
Sector: Real Estate
Industry: Industrial REITs
Source: LLMunreviewed
Self-reported confidence: 0.8
Model: deepseek
Rationale: Iron Mountain is a REIT that owns and operates storage and data center facilities, aligning with industrial REIT classification.

Classifications are unreviewed model output. All 5,771 assignments carry source = LLM and is_reviewed = false. Confidence is the model’s own estimate and is not calibrated — it clustered at 0.90–0.98 across the whole first pass, including rows that later proved wrong. Use it to order a review queue, not as a probability. Two share classes of one issuer can disagree.

Classification

Fund data

Not linked to a fund series.

Either this is not a fund, or it is one the SEC share-class snapshot cannot reach — commodity trusts and notes have no series ID at all.