What does CUSIP 46284V101 represent in this 13F holders report?

CUSIP 46284V101 is the security identifier for IRM - IRON MOUNTAIN INC - Common Stock used to aggregate holder disclosures.

How many institutions held IRM - IRON MOUNTAIN INC - Common Stock in Q4 2023?

884 institutional investors reported IRM - IRON MOUNTAIN INC - Common Stock for Q4 2023. Use the holders table for investor-level position and value details.

IRON MOUNTAIN INC - Common Stock (IRM)

CUSIP: 46284V101

Q4 2023 13F Holders as of 31 Dec 2023

Type / Class: Equity / Common Stock
Shares outstanding: 297,661,125
Total 13F shares: 233,491,997
Share change: +3,619,805
Total reported value: $16,340,519,763
Put/Call ratio: 73%
Price per share: $69.98
Number of holders: 884
Value change: +$271,706,582
Number of buys: 367
Number of sells: 408

Quarterly Holders Quick Answers

What is CUSIP 46284V101?
CUSIP 46284V101 identifies IRM - IRON MOUNTAIN INC - Common Stock in SEC institutional holdings data.

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Explore More Reporting Periods

Jump to adjacent filing periods for faster comparison and easier crawl discovery.

Newer quarter: Q1 2024
Previous quarter: Q3 2023

Recent filing periods for CUSIP 46284V101:

Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024

Top shareholders of IRM - IRON MOUNTAIN INC - Common Stock (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
VANGUARD GROUP INC	13F	Company	16%	46,612,766	$2,771,128,939	—	30 Sep 2023	13F
BlackRock Finance, Inc.	13F	Company	7.4%	22,138,459	$1,316,131,399	—	30 Sep 2023	13F
Capital World Investors	13F	Company	6.3%	18,835,824	$1,119,789,737	—	30 Sep 2023	13F
STATE STREET CORP	13F	Company	4.4%	13,193,403	$792,819,808	—	30 Sep 2023	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	2.5%	7,538,028	$447,319,145	—	30 Sep 2023	13F
COHEN & STEERS, INC.	13F	Company	2.5%	7,439,677	$442,310,000	—	30 Sep 2023	13F
DEUTSCHE BANK AG\	13F	Company	1.5%	4,571,545	$271,778,350	—	30 Sep 2023	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	1.4%	4,303,916	$255,872,190	—	30 Sep 2023	13F
MORGAN STANLEY	13F	Company	1.4%	4,222,129	$251,005,710	—	30 Sep 2023	13F
NORTHERN TRUST CORP	13F	Company	1.3%	3,913,828	$232,677,075	—	30 Sep 2023	13F
Pictet Asset Management Holding SA	13F	Company	1.1%	3,390,948	$201,591,859	—	30 Sep 2023	13F
FMR LLC	13F	Company	1.1%	3,380,540	$200,973,079	—	30 Sep 2023	13F
Invesco Ltd.	13F	Company	1.1%	3,243,435	$192,822,210	—	30 Sep 2023	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	1%	3,075,940	$182,864,661	—	30 Sep 2023	13F
WELLINGTON MANAGEMENT GROUP LLP	13F	Company	1%	3,012,260	$179,078,857	—	30 Sep 2023	13F
Amundi	13F	Individual	0.89%	2,652,647	$159,954,615	—	30 Sep 2023	13F
NORGES BANK	13F	Company	0.9%	2,674,814	$159,017,692	—	30 Sep 2023	13F
Daiwa Securities Group Inc.	13F	Company	0.85%	2,539,724	$150,987,000	—	30 Sep 2023	13F
Epoch Investment Partners, Inc.	13F	Company	0.79%	2,357,768	$140,169,308	—	30 Sep 2023	13F
Bank of New York Mellon Corp	13F	Company	0.78%	2,310,210	$137,341,992	—	30 Sep 2023	13F
Legal & General Group Plc	13F	Company	0.74%	2,200,603	$130,825,852	—	30 Sep 2023	13F
CITADEL ADVISORS LLC	13F	Company	0.61%	1,814,896	$107,895,567	—	30 Sep 2023	13F
AMERIPRISE FINANCIAL INC	13F	Company	0.58%	1,727,813	$103,744,433	—	30 Sep 2023	13F
JPMORGAN CHASE & CO	13F	Company	0.53%	1,585,420	$94,253,267	—	30 Sep 2023	13F
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	13F	Company	0.51%	1,515,120	$90,073,883	—	30 Sep 2023	13F
Russell Investments Group, Ltd.	13F	Company	0.44%	1,308,798	$77,904,829	—	30 Sep 2023	13F
PRUDENTIAL FINANCIAL INC	13F	Company	0.42%	1,243,519	$73,927,191	—	30 Sep 2023	13F
Deutsche Girozentrale DekaBank	13F	Individual	0.37%	1,105,599	$66,180,000	—	30 Sep 2023	13F
CIBC Private Wealth Group LLC	13F	Company	0.37%	1,100,879	$65,447,259	—	30 Sep 2023	13F
AMERICAN CENTURY COMPANIES INC	13F	Company	0.36%	1,058,277	$62,914,568	—	30 Sep 2023	13F
AGF MANAGEMENT LTD	13F	Company	0.34%	1,002,631	$59,606,413	—	30 Sep 2023	13F
Sumitomo Mitsui Trust Group, Inc.	13F	Company	0.32%	950,703	$56,519,293	—	30 Sep 2023	13F
BANK OF AMERICA CORP /DE/	13F	Company	0.32%	946,771	$56,285,526	—	30 Sep 2023	13F
Swiss National Bank	13F	Company	0.32%	938,061	$55,767,726	—	30 Sep 2023	13F
UBS Group AG	13F	Company	0.3%	892,448	$53,056,033	—	30 Sep 2023	13F
GOLDMAN SACHS GROUP INC	13F	Company	0.3%	880,709	$52,358,132	—	30 Sep 2023	13F
HEITMAN REAL ESTATE SECURITIES LLC	13F	Company	0.29%	868,819	$51,651,290	—	30 Sep 2023	13F
CANADA PENSION PLAN INVESTMENT BOARD	13F	Company	0.29%	859,490	$51,096,681	—	30 Sep 2023	13F
Rockefeller Capital Management L.P.	13F	Company	0.28%	835,557	$49,673,882	—	30 Sep 2023	13F
Nuveen Asset Management, LLC	13F	Company	0.28%	832,937	$49,518,105	—	30 Sep 2023	13F
CAPTRUST FINANCIAL ADVISORS	13F	Company	0.26%	767,677	$45,638,389	—	30 Sep 2023	13F
BNP Paribas Asset Management Holding S.A.	13F	Company	0.25%	743,910	$44,225,000	—	30 Sep 2023	13F
WELCH & FORBES LLC	13F	Company	0.25%	737,694	$43,855,952	—	30 Sep 2023	13F
Neuberger Berman Group LLC	13F	Company	0.24%	710,885	$42,262,113	—	30 Sep 2023	13F
RHUMBLINE ADVISERS	13F	Company	0.22%	647,059	$38,467,556	—	30 Sep 2023	13F
J.P. Morgan Private Wealth Advisors LLC	13F	Company	0.22%	646,426	$38,430,031	—	30 Sep 2023	13F
WELLS FARGO & COMPANY/MN	13F	Company	0.22%	640,480	$38,076,552	—	30 Sep 2023	13F
Border to Coast Pensions Partnership Ltd	13F	Company	0.2%	581,040	$34,787,000	—	30 Sep 2023	13F
BANK OF MONTREAL /CAN/	13F	Company	0.18%	546,709	$34,579,359	—	30 Sep 2023	13F
CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM	13F	Company	0.19%	578,558	$34,395,273	—	30 Sep 2023	13F

Institutional Holders of IRON MOUNTAIN INC - Common Stock (IRM) as of Q4 2023

As of 31 Dec 2023, IRON MOUNTAIN INC - Common Stock (IRM) was held by 884 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 233,491,997 shares. The largest 10 holders included VANGUARD GROUP INC, BlackRock Inc., COHEN & STEERS, INC., STATE STREET CORP, GEODE CAPITAL MANAGEMENT, LLC, DEUTSCHE BANK AG\, DIMENSIONAL FUND ADVISORS LP, Capital World Investors, Daiwa Securities Group Inc., and MORGAN STANLEY. This page lists 885 institutional shareholders reporting positions in this security for the Q4 2023 filing period.

Investor	Option	Weight %	Change %	Value $	* Price	Shares	Share Change	Activity	Report Period

Compare Q4 2023 vs Q3 2023 Across Filers

Q3 2023 holders

826

Q4 2023 holders

884

Holder diff

Investor	Q3 2023 Shares	Q4 2023 Shares	Share Diff	Share Chg %	Q3 2023 Value $	Q4 2023 Value $	Value Diff $	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.