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 Q2 2016?

376 institutional investors reported IRM - IRON MOUNTAIN INC - Common Stock for Q2 2016. Use the holders table for investor-level position and value details.

IRON MOUNTAIN INC - Common Stock (IRM)

CUSIP: 46284V101

Q2 2016 13F Holders as of 30 Jun 2016

Type / Class: Equity / Common Stock
Shares outstanding: 295,766,873
Total 13F shares: 214,339,014
Share change: +11,565,122
Total reported value: $8,533,031,123
Put/Call ratio: 173%
Price per share: $39.83
Number of holders: 376
Value change: +$470,432,632
Number of buys: 255
Number of sells: 89

Quarterly Holders Quick Answers

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

Need full ownership history?
Open the full security ownership history page.

Related Filing Research

Latest 13F filings for newly reported positions.
Latest Schedule 13D/13G reports for ownership changes outside 13F cadence.
Latest 10-Q/10-K reports for financial context tied to this issuer.
Recent insider transactions for executive and insider activity.
SEC investors directory and top value investors for manager drilldown.
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Explore More Reporting Periods

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

Newer quarter: Q3 2016
Previous quarter: Q1 2016

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	11%	31,602,282	$1,071,633,000	—	31 Mar 2016	13F
Capital World Investors	13F	Company	8.1%	24,048,914	$815,499,000	—	31 Mar 2016	13F
PRICE T ROWE ASSOCIATES INC /MD/	13F	Company	5%	14,770,229	$500,858,000	—	31 Mar 2016	13F
Capital International Investors	13F	Company	4.5%	13,214,475	$448,103,000	—	31 Mar 2016	13F
PARNASSUS INVESTMENTS, LLC	13F	Company	4.1%	12,024,081	$407,737,000	—	31 Mar 2016	13F
STATE STREET CORP	13F	Company	2.8%	8,324,841	$282,286,000	—	31 Mar 2016	13F
Epoch Investment Partners, Inc.	13F	Company	2.8%	8,217,534	$278,657,000	—	31 Mar 2016	13F
SCHOONER CAPITAL CORP	13F	Company	2.7%	7,896,032	$267,754,000	—	31 Mar 2016	13F
BlackRock Institutional Trust Company, N.A.	13F	Company	2.2%	6,484,335	$219,884,000	—	31 Mar 2016	13F
BlackRock Fund Advisors	13F	Company	1.4%	4,033,763	$136,785,000	—	31 Mar 2016	13F
CAPITAL GUARDIAN TRUST CO	13F	Company	1.2%	3,669,004	$124,416,000	—	31 Mar 2016	13F
River Road Asset Management, LLC	13F	Company	1.2%	3,540,912	$120,072,000	—	31 Mar 2016	13F
Schooner Foundation	13F	Company	1.1%	3,371,561	$114,330,000	—	31 Mar 2016	13F
Makaira Partners LLC	13F	Company	1%	3,067,404	$104,016,000	—	31 Mar 2016	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	0.88%	2,602,616	$88,253,000	—	31 Mar 2016	13F
Bank of New York Mellon Corp	13F	Company	0.82%	2,413,529	$81,842,000	—	31 Mar 2016	13F
RAYMOND JAMES & ASSOCIATES	13F	Company	0.78%	2,299,070	$77,961,000	—	31 Mar 2016	13F
JANUS HENDERSON GROUP PLC	13F	Company	0.74%	2,180,508	$73,908,000	—	31 Mar 2016	13F
NORTHERN TRUST CORP	13F	Company	0.73%	2,168,280	$73,527,000	—	31 Mar 2016	13F
Invesco Ltd.	13F	Company	0.61%	1,791,796	$60,760,000	—	31 Mar 2016	13F
Allianz Asset Management GmbH	13F	Company	0.6%	1,780,497	$60,377,000	—	31 Mar 2016	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	0.55%	1,612,917	$54,584,000	—	31 Mar 2016	13F
RS INVESTMENT MANAGEMENT CO LLC	13F	Company	0.51%	1,521,552	$51,596,000	—	31 Mar 2016	13F
CONFLUENCE INVESTMENT MANAGEMENT LLC	13F	Company	0.51%	1,507,333	$51,114,000	—	31 Mar 2016	13F
NORGES BANK	13F	Company	0.5%	1,465,818	$49,706,000	—	31 Mar 2016	13F
Uniplan Investment Counsel, Inc.	13F	Company	0.58%	1,710,721	$49,045,000	—	31 Mar 2016	13F
BlackRock Group LTD	13F	Company	0.49%	1,444,426	$48,981,000	—	31 Mar 2016	13F
WELCH & FORBES LLC	13F	Company	0.42%	1,234,367	$41,857,000	—	31 Mar 2016	13F
DEUTSCHE BANK AG\	13F	Company	0.35%	1,044,966	$35,432,000	—	31 Mar 2016	13F
UNITED SERVICES AUTOMOBILE ASSOCIATION	13F	Company	0.34%	998,465	$33,858,000	—	31 Mar 2016	13F
BLAIR WILLIAM & CO/IL	13F	Company	0.32%	954,590	$32,370,000	—	31 Mar 2016	13F
GOLDMAN SACHS GROUP INC	13F	Company	0.29%	871,608	$29,556,000	—	31 Mar 2016	13F
Legal & General Group Plc	13F	Company	0.29%	864,122	$29,299,000	—	31 Mar 2016	13F
BANK OF AMERICA CORP /DE/	13F	Company	0.29%	846,253	$28,697,000	—	31 Mar 2016	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.27%	785,772	$26,646,000	—	31 Mar 2016	13F
THOMPSON SIEGEL & WALMSLEY LLC	13F	Company	0.26%	754,982	$25,601,000	—	31 Mar 2016	13F
GUGGENHEIM CAPITAL LLC	13F	Company	0.25%	750,256	$25,441,000	—	31 Mar 2016	13F
MILLENNIUM MANAGEMENT LLC	13F	Company	0.25%	745,873	$25,293,000	—	31 Mar 2016	13F
TIAA CREF INVESTMENT MANAGEMENT LLC	13F	Company	0.24%	711,526	$24,128,000	—	31 Mar 2016	13F
CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM	13F	Company	0.24%	700,099	$23,740,000	—	31 Mar 2016	13F
Sumitomo Mitsui Trust Group, Inc.	13F	Company	0.23%	669,973	$22,719,000	—	31 Mar 2016	13F
TD ASSET MANAGEMENT INC	13F	Company	0.22%	664,449	$22,531,000	—	31 Mar 2016	13F
WASATCH ADVISORS LP	13F	Company	0.21%	608,074	$20,437,000	—	31 Mar 2016	13F
Mitsubishi UFJ Trust & Banking Corp	13F	Company	0.2%	589,986	$20,006,000	—	31 Mar 2016	13F
SYMONS CAPITAL MANAGEMENT INC	13F	Company	0.2%	586,854	$19,900,000	—	31 Mar 2016	13F
PARAMETRIC PORTFOLIO ASSOCIATES LLC	13F	Company	0.19%	549,019	$18,617,000	—	31 Mar 2016	13F
Swiss National Bank	13F	Company	0.18%	521,091	$16,935,000	—	31 Mar 2016	13F
COLRAIN CAPITAL LLC	13F	Company	0.16%	483,500	$16,395,000	—	31 Mar 2016	13F
NEW YORK STATE COMMON RETIREMENT FUND	13F	Company	0.16%	482,900	$16,375,000	—	31 Mar 2016	13F
MORGAN STANLEY	13F	Company	0.16%	465,892	$15,798,000	—	31 Mar 2016	13F

Institutional Holders of IRON MOUNTAIN INC - Common Stock (IRM) as of Q2 2016

As of 30 Jun 2016, IRON MOUNTAIN INC - Common Stock (IRM) was held by 376 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 214,339,014 shares. The largest 10 holders included VANGUARD GROUP INC, Capital World Investors, Capital International Investors, PARNASSUS INVESTMENTS /CA, STATE STREET CORP, BlackRock Institutional Trust Company, N.A., Epoch Investment Partners, Inc., SCHOONER CAPITAL Corp, BlackRock Fund Advisors, and CAPITAL GUARDIAN TRUST CO. This page lists 376 institutional shareholders reporting positions in this security for the Q2 2016 filing period.

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

Compare Q2 2016 vs Q1 2016 Across Filers

Q1 2016 holders

336

Q2 2016 holders

376

Holder diff

Investor	Q1 2016 Shares	Q2 2016 Shares	Share Diff	Share Chg %	Q1 2016 Value $	Q2 2016 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.