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
Eaton Vance Management	41,217	$1.52M	0.00%	–	–
Wealthfront Advisers LLC	41,706	$1.54M	0.01%	–	–
Hartford Investment Management Co	41,769	$1.55M	0.04%	–	–
Bramshill Investments, LLC	42,439	$1.57M	0.10%	–	–
Shell Asset Management Co	43,139	$1.60M	0.03%	–	–
Columbia Asset Management	43,594	$1.61M	0.29%	–	–
HNP Capital LLC	43,837	$1.62M	0.48%	–	–
Pensionfund Sabic	44,000	$1.63M	0.38%	–	–
Vectors Research Management, LLC	44,250	$1.64M	0.45%	–	–
AQR Capital Management LLC	44,666	$1.65M	0.00%	–	–
Searle & Co.	45,200	$1.67M	0.75%	–	–
Ingalls & Snyder LLC	45,968	$1.70M	0.08%	–	–
Virtus ETF Advisers LLC	45,955	$1.70M	0.72%	–	–
Banco Bilbao Vizcaya Argentaria, S.A.	46,019	$1.70M	0.03%	–	–
British Columbia Investment Management Corp	47,263	$1.75M	0.01%	–	–
Northwest & Ethical Investments L.P.	47,574	$1.76M	0.06%	–	–
Texas Permanent School Fund	48,161	$1.78M	0.02%	–	–
Beck Capital Management, LLC	48,357	$1.79M	0.68%	–	–
Amalgamated Bank	48,463	$1.79M	0.07%	–	–
Allianz Asset Management GmbH	49,525	$1.83M	0.00%	–	–
Burney Co	50,569	$1.87M	0.09%	–	–
First Trust Advisors LP	50,603	$1.87M	0.00%	–	–
Mackay Shields LLC	52,334	$1.94M	0.01%	–	–
Concorde Asset Management, LLC	52,657	$1.95M	1.12%	–	–
Werlinich Asset Management, LLC	52,840	$1.96M	1.72%	–	–
MML Investors Services, LLC	52,926	$1.96M	0.02%	–	–
National Asset Management, Inc.	52,938	$1.96M	0.07%	–	–
Measured Wealth Private Client Group, LLC	52,997	$1.96M	0.70%	–	–
Baird Financial Group, Inc.	53,996	$2.00M	0.01%	–	–
SeaBridge Investment Advisors LLC	54,695	$2.02M	0.67%	–	–
M&T Bank Corp	54,815	$2.03M	0.01%	–	–
Utah Retirement Systems	54,814	$2.03M	0.03%	–	–
Bank of Nova Scotia	54,981	$2.04M	0.00%	–	–
Nissay Asset Management Corp	55,688	$2.06M	0.02%	–	–
Cetera Advisor Networks LLC	56,579	$2.09M	0.04%	–	–
Kavar Capital Partners Group, LLC	58,428	$2.16M	0.58%	–	–
Jennison Associates LLC	59,154	$2.19M	0.00%	–	–
Madden Securities Corp	59,948	$2.22M	1.30%	–	–
Truvestments Capital LLC	62,248	$2.30M	1.30%	–	–
Advisors Asset Management, Inc.	62,487	$2.31M	0.04%	–	–
BNP Paribas Arbitrage, SA	64,145	$2.37M	0.01%	–	–
Ziegler Capital Management, LLC	65,875	$2.44M	0.08%	–	–
Cetera Advisors LLC	65,934	$2.44M	0.07%	–	–
Panagora Asset Management Inc	66,493	$2.46M	0.01%	–	–
Caisse de Depot Et Placement du Quebec	66,608	$2.46M	0.01%	–	–
Advisory Services Network, LLC	67,269	$2.49M	0.09%	–	–
MetLife Investment Management	68,729	$2.54M	0.02%	–	–
Handelsbanken Fonder AB	69,072	$2.56M	0.01%	–	–
Russell Investments Group, Ltd.	69,689	$2.58M	0.00%	–	–
Westpac Banking Corp	70,221	$2.60M	0.03%	–	–
Peapack Gladstone Financial Corp	71,161	$2.63M	0.07%	–	–
Metropolitan Life Insurance Co	73,924	$2.74M	0.04%	–	–
Private Advisor Group, LLC	74,136	$2.74M	0.03%	–	–
State of Michigan Retirement System	77,096	$2.85M	0.02%	–	–
Los Angeles Capital Management LLC	79,253	$2.93M	0.01%	–	–
USS Investment Management Ltd	79,281	$2.94M	0.03%	–	–
Capital Square, LLC	80,134	$3.02M	2.24%	–	–
KBC Group NV	83,022	$3.07M	0.01%	–	–
Arizona State Retirement System	83,087	$3.08M	0.03%	–	–
ExodusPoint Capital Management, LP	83,159	$3.08M	0.06%	–	–
Ensign Peak Advisors, Inc	83,219	$3.08M	0.01%	–	–
Two Sigma Advisers, LP	83,200	$3.08M	0.01%	–	–
Cipher Capital LP	84,425	$3.13M	0.37%	–	–
Moors & Cabot, Inc.	84,704	$3.14M	0.24%	–	–
Susquehanna International Group, LLP	84,939	$3.14M	0.00%	–	–
Nelson Capital Management, LLC	85,895	$3.18M	0.68%	–	–
HighTower Advisors, LLC	86,174	$3.19M	0.01%	–	–
Azimuth Capital Management LLC	87,123	$3.22M	0.15%	–	–
Comerica Bank	81,044	$3.27M	0.02%	–	–
SEI Investments Co	92,682	$3.43M	0.01%	–	–
Natixis Advisors, L.P.	92,844	$3.44M	0.02%	–	–
Worldquant Millennium Advisors LLC	94,029	$3.48M	0.07%	–	–
Chicago Capital, LLC	94,416	$3.49M	0.15%	–	–
Aviva PLC	94,988	$3.52M	0.02%	–	–
TD Private Client Wealth LLC	95,414	$3.53M	0.16%	–	–
Pensionfund DSM Netherlands	95,500	$3.53M	0.47%	–	–
Sonora Investment Management, LLC	95,579	$3.54M	0.28%	–	–
Baker Ellis Asset Management LLC	95,601	$3.54M	0.76%	–	–
Brookstone Capital Management	97,253	$3.60M	0.14%	–	–
The PNC Financial Services Group, Inc.	98,141	$3.63M	0.00%	–	–
Oregon Public Employees Retirement Fund	98,316	$3.64M	0.04%	–	–
Daiwa Securities Group Inc.	98,948	$3.66M	0.03%	–	–
AlphaCrest Capital Management LLC	98,966	$3.66M	0.20%	–	–
TRUE Private Wealth Advisors	97,878	$3.68M	0.60%	–	–
Siemens Fonds Invest GmbH	100,855	$3.73M	0.36%	–	–
Royal London Asset Management Ltd	101,654	$3.76M	0.02%	–	–
ProShare Advisors LLC	101,851	$3.77M	0.01%	–	–
Fjarde Ap-Fonden /Fourth Swedish National Pension Fund	102,765	$3.80M	0.03%	–	–
Forsta Ap-Fonden	104,500	$3.87M	0.05%	–	–
Avantax Advisory Services, Inc.	105,980	$3.92M	0.08%	–	–
Truist Financial Corp	108,158	$4.00M	0.01%	–	–
Janus Henderson Group PLC	108,189	$4.00M	0.00%	–	–
Cambridge Investment Research Advisors, Inc.	109,458	$4.05M	0.02%	–	–
Treasurer of the State of North Carolina	111,113	$4.11M	0.03%	–	–
Zimmer Partners, LP	112,500	$4.16M	0.06%	–	–
AMP Capital Investors Ltd	113,104	$4.19M	0.02%	–	–
Renaissance Technologies LLC	114,463	$4.24M	0.01%	–	–
Woodstock Corp	116,246	$4.30M	0.55%	–	–
American Trust Investment Advisors, LLC	117,286	$4.34M	2.53%	–	–
WBI Investments	120,259	$4.45M	0.70%	–	–