Iron Mountain Inc

IRM

Exchange: NYSE
Industry: Real Estate Investment Trusts
SEC CIK: 0001020569

SEC filings (opens in a new tab)

In the last 90 days, Iron Mountain Inc insiders filed 0 open-market purchases and 6 sales; 1,173 institutions reported holding it in 13F filings for Q2 2026, worth $32.4B in total; no superinvestor holds it.

13F holders, Q1 2021

Institutional positions in Iron Mountain Inc as of Mar 31, 2021. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders: 630; No complete 13F data for Q4 2020
Shares held: 227.8M; No complete 13F data for Q4 2020
Total value: $8.44B; No complete 13F data for Q4 2020

Holders and value by quarter

Institutions reporting IRM on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ1 2021: 630 institutions

Value heldQ1 2021: $8.44B

Institutions holding IRM and their total value by quarter
Quarter	Holders	Value
Q2 2026	1,173	$32.4B
Q1 2026	1,090	$25.9B
Q4 2025	1,011	$21.4B
Q3 2025	1,017	$25.5B
Q2 2025	1,045	$25.5B
Q1 2025	995	$21.1B
Q4 2024	1,067	$24.9B
Q3 2024	1,056	$28.8B
Q2 2024	967	$22.2B
Q1 2024	938	$19.0B
Q4 2023	891	$16.4B
Q3 2023	831	$13.7B
Q2 2023	817	$12.9B
Q1 2023	790	$12.0B
Q4 2022	782	$11.4B
Q3 2022	743	$10.0B
Q2 2022	767	$10.9B
Q1 2022	777	$12.4B
Q4 2021	754	$12.0B
Q3 2021	711	$9.94B
Q2 2021	687	$9.70B
Q1 2021	630	$8.44B

Institutions, Q1 2021

Shares, value and share of portfolio for each institution holding Iron Mountain Inc.

Livermore's 13F data starts with Q1 2021, so Q1 2021 has no change from the previous quarter.

Institutions holding IRM in Q1 2021
Institution	Shares	Value	% of portfolio	Change in shares	Action
Gilman Hill Asset Management, LLC	187,843	$6.95M	1.93%	–	–
Toronto Dominion Bank	183,497	$6.79M	0.01%	–	–
Standard Life Aberdeen plc	181,788	$6.73M	0.02%	–	–
Natixis	181,121	$6.70M	0.02%	–	–
Andra AP-fonden	174,200	$6.45M	0.14%	–	–
Canada Pension Plan Investment Board	166,475	$6.16M	0.01%	–	–
QS Investors, LLC	166,183	$6.15M	0.07%	–	–
Commonwealth Equity Services, LLC	164,172	$6.08M	0.02%	–	–
Trust Co of Virginia	161,213	$5.97M	0.69%	–	–
Public Employees Retirement System of Ohio	159,601	$5.91M	0.02%	–	–
State of New Jersey Common Pension Fund D	159,291	$5.89M	0.02%	–	–
Sargent Investment Group, LLC	156,673	$5.80M	1.53%	–	–
State of Alaska, Department of Revenue	156,398	$5.79M	0.06%	–	–
Raymond James Financial Services Advisors, Inc.	155,019	$5.74M	0.01%	–	–
Mutual Advisors, LLC	151,946	$5.62M	0.39%	–	–
BNP PARIBAS ASSET MANAGEMENT Holding S.A.	150,247	$5.56M	0.02%	–	–
Voya Investment Management LLC	147,991	$5.48M	0.01%	–	–
Snowden Capital Advisors LLC	147,656	$5.46M	0.31%	–	–
Pictet Asset Management Ltd	135,746	$5.02M	0.01%	–	–
Victory Capital Management Inc	134,183	$4.97M	0.01%	–	–
State of Wisconsin Investment Board	133,407	$4.94M	0.01%	–	–
Macquarie Group Ltd	130,772	$4.84M	0.01%	–	–
Berger Financial Group, Inc	129,072	$4.78M	1.04%	–	–
Ar Asset Management Inc	128,600	$4.76M	1.42%	–	–
American International Group, Inc.	127,869	$4.73M	0.02%	–	–
Oliver Luxxe Assets LLC	127,684	$4.73M	1.42%	–	–
Neuberger Berman Group LLC	124,800	$4.66M	0.00%	–	–
Janney Montgomery Scott LLC	124,352	$4.60M	0.02%	–	–
Salem Investment Counselors Inc	121,123	$4.48M	0.27%	–	–
WBI Investments	120,259	$4.45M	0.70%	–	–
American Trust Investment Advisors, LLC	117,286	$4.34M	2.53%	–	–
Woodstock Corp	116,246	$4.30M	0.55%	–	–
Renaissance Technologies LLC	114,463	$4.24M	0.01%	–	–
AMP Capital Investors Ltd	113,104	$4.19M	0.02%	–	–
Zimmer Partners, LP	112,500	$4.16M	0.06%	–	–
Treasurer of the State of North Carolina	111,113	$4.11M	0.03%	–	–
Cambridge Investment Research Advisors, Inc.	109,458	$4.05M	0.02%	–	–
Janus Henderson Group PLC	108,189	$4.00M	0.00%	–	–
Truist Financial Corp	108,158	$4.00M	0.01%	–	–
Avantax Advisory Services, Inc.	105,980	$3.92M	0.08%	–	–
Forsta Ap-Fonden	104,500	$3.87M	0.05%	–	–
Fjarde Ap-Fonden /Fourth Swedish National Pension Fund	102,765	$3.80M	0.03%	–	–
ProShare Advisors LLC	101,851	$3.77M	0.01%	–	–
Royal London Asset Management Ltd	101,654	$3.76M	0.02%	–	–
Siemens Fonds Invest GmbH	100,855	$3.73M	0.36%	–	–
TRUE Private Wealth Advisors	97,878	$3.68M	0.60%	–	–
AlphaCrest Capital Management LLC	98,966	$3.66M	0.20%	–	–
Daiwa Securities Group Inc.	98,948	$3.66M	0.03%	–	–
Oregon Public Employees Retirement Fund	98,316	$3.64M	0.04%	–	–
The PNC Financial Services Group, Inc.	98,141	$3.63M	0.00%	–	–
Brookstone Capital Management	97,253	$3.60M	0.14%	–	–
Baker Ellis Asset Management LLC	95,601	$3.54M	0.76%	–	–
Sonora Investment Management, LLC	95,579	$3.54M	0.28%	–	–
Pensionfund DSM Netherlands	95,500	$3.53M	0.47%	–	–
TD Private Client Wealth LLC	95,414	$3.53M	0.16%	–	–
Aviva PLC	94,988	$3.52M	0.02%	–	–
Chicago Capital, LLC	94,416	$3.49M	0.15%	–	–
Worldquant Millennium Advisors LLC	94,029	$3.48M	0.07%	–	–
Natixis Advisors, L.P.	92,844	$3.44M	0.02%	–	–
SEI Investments Co	92,682	$3.43M	0.01%	–	–
Comerica Bank	81,044	$3.27M	0.02%	–	–
Azimuth Capital Management LLC	87,123	$3.22M	0.15%	–	–
HighTower Advisors, LLC	86,174	$3.19M	0.01%	–	–
Nelson Capital Management, LLC	85,895	$3.18M	0.68%	–	–
Susquehanna International Group, LLP	84,939	$3.14M	0.00%	–	–
Moors & Cabot, Inc.	84,704	$3.14M	0.24%	–	–
Cipher Capital LP	84,425	$3.13M	0.37%	–	–
Ensign Peak Advisors, Inc	83,219	$3.08M	0.01%	–	–
Two Sigma Advisers, LP	83,200	$3.08M	0.01%	–	–
ExodusPoint Capital Management, LP	83,159	$3.08M	0.06%	–	–
Arizona State Retirement System	83,087	$3.08M	0.03%	–	–
KBC Group NV	83,022	$3.07M	0.01%	–	–
Capital Square, LLC	80,134	$3.02M	2.24%	–	–
USS Investment Management Ltd	79,281	$2.94M	0.03%	–	–
Los Angeles Capital Management LLC	79,253	$2.93M	0.01%	–	–
State of Michigan Retirement System	77,096	$2.85M	0.02%	–	–
Private Advisor Group, LLC	74,136	$2.74M	0.03%	–	–
Metropolitan Life Insurance Co	73,924	$2.74M	0.04%	–	–
Peapack Gladstone Financial Corp	71,161	$2.63M	0.07%	–	–
Westpac Banking Corp	70,221	$2.60M	0.03%	–	–
Russell Investments Group, Ltd.	69,689	$2.58M	0.00%	–	–
Handelsbanken Fonder AB	69,072	$2.56M	0.01%	–	–
MetLife Investment Management	68,729	$2.54M	0.02%	–	–
Advisory Services Network, LLC	67,269	$2.49M	0.09%	–	–
Caisse de Depot Et Placement du Quebec	66,608	$2.46M	0.01%	–	–
Panagora Asset Management Inc	66,493	$2.46M	0.01%	–	–
Cetera Advisors LLC	65,934	$2.44M	0.07%	–	–
Ziegler Capital Management, LLC	65,875	$2.44M	0.08%	–	–
BNP Paribas Arbitrage, SA	64,145	$2.37M	0.01%	–	–
Advisors Asset Management, Inc.	62,487	$2.31M	0.04%	–	–
Truvestments Capital LLC	62,248	$2.30M	1.30%	–	–
Madden Securities Corp	59,948	$2.22M	1.30%	–	–
Jennison Associates LLC	59,154	$2.19M	0.00%	–	–
Kavar Capital Partners Group, LLC	58,428	$2.16M	0.58%	–	–
Cetera Advisor Networks LLC	56,579	$2.09M	0.04%	–	–
Nissay Asset Management Corp	55,688	$2.06M	0.02%	–	–
Bank of Nova Scotia	54,981	$2.04M	0.00%	–	–
Utah Retirement Systems	54,814	$2.03M	0.03%	–	–
M&T Bank Corp	54,815	$2.03M	0.01%	–	–
SeaBridge Investment Advisors LLC	54,695	$2.02M	0.67%	–	–