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 Q1 2016?

336 institutional investors reported IRM - IRON MOUNTAIN INC - Common Stock for Q1 2016. Use the holders table for investor-level position and value details.

IRON MOUNTAIN INC - Common Stock (IRM)

CUSIP: 46284V101

Q1 2016 13F Holders as of 31 Mar 2016

Type / Class: Equity / Common Stock
Shares outstanding: 295,766,873
Total 13F shares: 202,754,255
Share change: -41,965
Total reported value: $6,873,479,222
Put/Call ratio: 366%
Price per share: $33.91
Number of holders: 336
Value change: +$16,388,073
Number of buys: 152
Number of sells: 160

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: Q2 2016
Previous quarter: Q4 2015

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	10%	30,793,809	$831,740,000	—	31 Dec 2015	13F
Capital World Investors	13F	Company	7.5%	22,148,914	$598,242,000	—	31 Dec 2015	13F
PRICE T ROWE ASSOCIATES INC /MD/	13F	Company	5%	14,855,974	$401,260,000	—	31 Dec 2015	13F
PARNASSUS INVESTMENTS, LLC	13F	Company	4%	11,888,395	$321,106,000	—	31 Dec 2015	13F
Capital International Investors	13F	Company	3.7%	10,989,342	$296,822,000	—	31 Dec 2015	13F
STATE STREET CORP	13F	Company	2.8%	8,362,499	$225,872,000	—	31 Dec 2015	13F
SCHOONER CAPITAL CORP	13F	Company	2.8%	8,346,463	$225,438,000	—	31 Dec 2015	13F
Epoch Investment Partners, Inc.	13F	Company	2.8%	8,224,960	$222,156,000	—	31 Dec 2015	13F
BlackRock Institutional Trust Company, N.A.	13F	Company	2.2%	6,445,313	$174,088,000	—	31 Dec 2015	13F
River Road Asset Management, LLC	13F	Company	1.4%	4,162,718	$112,435,000	—	31 Dec 2015	13F
BlackRock Fund Advisors	13F	Company	1.4%	4,121,598	$111,324,000	—	31 Dec 2015	13F
CAPITAL GUARDIAN TRUST CO	13F	Company	1.2%	3,503,957	$94,642,000	—	31 Dec 2015	13F
Schooner Foundation	13F	Company	1.1%	3,371,561	$91,066,000	—	31 Dec 2015	13F
Makaira Partners LLC	13F	Company	1%	3,001,704	$81,076,000	—	31 Dec 2015	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	0.84%	2,476,199	$66,885,000	—	31 Dec 2015	13F
NORTHERN TRUST CORP	13F	Company	0.73%	2,156,310	$58,241,000	—	31 Dec 2015	13F
JANUS HENDERSON GROUP PLC	13F	Company	0.72%	2,132,448	$57,587,000	—	31 Dec 2015	13F
Bank of New York Mellon Corp	13F	Company	0.72%	2,127,450	$57,463,000	—	31 Dec 2015	13F
RAYMOND JAMES & ASSOCIATES	13F	Company	0.69%	2,054,890	$55,503,000	—	31 Dec 2015	13F
RS INVESTMENT MANAGEMENT CO LLC	13F	Company	0.65%	1,926,715	$52,041,000	—	31 Dec 2015	13F
Uniplan Investment Counsel, Inc.	13F	Company	— mixed-class rows	1,752,486 mixed-class rows	$47,334,000	—	31 Dec 2015	13F
Allianz Asset Management GmbH	13F	Company	0.59%	1,750,337	$47,278,000	—	31 Dec 2015	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	0.53%	1,575,752	$42,473,000	—	31 Dec 2015	13F
BlackRock Group LTD	13F	Company	0.47%	1,400,866	$37,838,000	—	31 Dec 2015	13F
DEUTSCHE BANK AG\	13F	Company	0.47%	1,399,457	$37,797,000	—	31 Dec 2015	13F
NORGES BANK	13F	Company	0.47%	1,395,897	$37,703,000	—	31 Dec 2015	13F
CONFLUENCE INVESTMENT MANAGEMENT LLC	13F	Company	0.46%	1,371,229	$37,037,000	—	31 Dec 2015	13F
WELCH & FORBES LLC	13F	Company	0.43%	1,275,826	$34,460,000	—	31 Dec 2015	13F
WASATCH ADVISORS LP	13F	Company	0.42%	1,230,679	$33,241,000	—	31 Dec 2015	13F
COLRAIN CAPITAL LLC	13F	Company	0.37%	1,092,250	$29,502,000	—	31 Dec 2015	13F
HIGHFIELDS CAPITAL MANAGEMENT LP	13F	Company	0.36%	1,069,868	$28,897,000	—	31 Dec 2015	13F
UNITED SERVICES AUTOMOBILE ASSOCIATION	13F	Company	0.34%	997,187	$26,934,000	—	31 Dec 2015	13F
GUGGENHEIM CAPITAL LLC	13F	Company	0.32%	958,642	$25,893,000	—	31 Dec 2015	13F
BLAIR WILLIAM & CO/IL	13F	Company	0.32%	954,658	$25,784,000	—	31 Dec 2015	13F
Legal & General Group Plc	13F	Company	0.28%	832,700	$22,496,000	—	31 Dec 2015	13F
GW CAPITAL INC	13F	Company	0.26%	782,436	$21,134,000	—	31 Dec 2015	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.26%	772,759	$20,873,000	—	31 Dec 2015	13F
THOMPSON SIEGEL & WALMSLEY LLC	13F	Company	0.26%	759,895	$20,525,000	—	31 Dec 2015	13F
BANK OF AMERICA CORP /DE/	13F	Company	0.25%	754,110	$20,369,000	—	31 Dec 2015	13F
TIAA CREF INVESTMENT MANAGEMENT LLC	13F	Company	0.25%	729,449	$19,702,000	—	31 Dec 2015	13F
GOLDMAN SACHS GROUP INC	13F	Company	0.24%	700,441	$18,919,000	—	31 Dec 2015	13F
Stonerise Capital Management, LLC	13F	Company	0.23%	675,000	$18,232,000	—	31 Dec 2015	13F
Sumitomo Mitsui Trust Group, Inc.	13F	Company	0.22%	641,074	$17,681,000	—	31 Dec 2015	13F
CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM	13F	Company	0.22%	639,699	$17,278,000	—	31 Dec 2015	13F
TD ASSET MANAGEMENT INC	13F	Company	0.21%	618,583	$16,708,000	—	31 Dec 2015	13F
TWO SIGMA INVESTMENTS, LP	13F	Company	0.2%	595,850	$16,094,000	—	31 Dec 2015	13F
SYMONS CAPITAL MANAGEMENT INC	13F	Company	0.2%	588,354	$15,892,000	—	31 Dec 2015	13F
MORGAN STANLEY	13F	Company	0.19%	570,994	$15,423,000	—	31 Dec 2015	13F
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO	13F	Company	0.17%	495,209	$13,376,000	—	31 Dec 2015	13F
Asset Management One Co., Ltd.	13F	Company	0.16%	465,998	$13,159,000	—	31 Dec 2015	13F

Institutional Holders of IRON MOUNTAIN INC - Common Stock (IRM) as of Q1 2016

As of 31 Mar 2016, IRON MOUNTAIN INC - Common Stock (IRM) was held by 336 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 202,754,255 shares. The largest 10 holders included VANGUARD GROUP INC, Capital World Investors, PRICE T ROWE ASSOCIATES INC /MD/, Capital International Investors, PARNASSUS INVESTMENTS /CA, STATE STREET CORP, Epoch Investment Partners, Inc., SCHOONER CAPITAL Corp, BlackRock Institutional Trust Company, N.A., and BlackRock Fund Advisors. This page lists 336 institutional shareholders reporting positions in this security for the Q1 2016 filing period.

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

Compare Q1 2016 vs Q4 2015 Across Filers

Q4 2015 holders

328

Q1 2016 holders

336

Holder diff

Investor	Q4 2015 Shares	Q1 2016 Shares	Share Diff	Share Chg %	Q4 2015 Value $	Q1 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.