Capital World Investors

Position in IRM — Iron Mountain Inc

CIK 1422849 LOS ANGELES, CA

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Position in IRM

as of Jun 30, 2026 · filed Aug 12, 2026 Compact

Position Value

$153,740,616

-$36,972,025 QoQ

Shares Held

1,217,169

-34.8% QoQ

Ownership

0.409%

of shares outstanding

% of Portfolio

0.02%

of 13F equity value

Holder Rank

#34

of 1,152 holders

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Common Shares in IRM Over Time

Shares Held

Position Value (USD)

Position in REIT - Specialty

Real Estate · as of Jun 30, 2026

Capital World Investors holds $1,502,460,894 across 4 REIT - Specialty names. IRM ranks #2 (10.2% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	AMT	American Tower Corp /Ma/	6,554,891	$1,072,183,520
2	IRM	Iron Mountain Inc This page	1,217,169	$153,740,616
3	LAMR	Lamar Advertising Co/New	903,020	$140,853,059
4	CCI	Crown Castle Inc.	1,791,677	$135,683,699

All Filings in IRM

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25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$153,740,616	1,217,169	-34.8%	Shares	Defined	2026-08-12
2026-03-31	$190,712,641	1,867,169	-11.8%	Shares	Defined	2026-05-13
2025-12-31	$175,619,168	2,117,169	0.0%	Shares	Defined	2026-02-11
2025-09-30	$215,824,207	2,117,169	0.0%	Shares	Defined	2025-11-13
2025-06-30	$217,158,024	2,117,169	0.0%	Shares	Defined	2025-08-13
2025-03-31	$182,161,220	2,117,169	-44.5%	Shares	Defined	2025-05-12
2024-12-31	$401,248,700	3,817,417	-7.3%	Shares	Defined	2025-02-13
2024-09-30	$489,100,596	4,115,969	-0.0%	Shares	Defined	2024-11-13
2024-06-30	$368,889,004	4,116,146	+0.0%	Shares	Defined	2024-08-13
2024-03-31	$330,154,225	4,116,123	-0.0%	Shares	Defined	2024-05-14
2023-12-31	$288,113,188	4,117,079	-78.1%	Shares	Defined	2024-02-13
2023-09-30	$1,119,789,736	18,835,824	-7.5%	Shares	Defined	2023-11-13
2023-06-30	$1,156,856,904	20,360,030	-20.1%	Shares	Defined	2023-08-11
2023-03-31	$1,348,489,498	25,486,477	+0.0%	Shares	Defined	2023-05-15
2022-12-31	$1,270,236,374	25,481,171	+3.2%	Shares	Defined	2023-02-14
2022-09-30	$1,085,181,622	24,680,046	-14.6%	Shares	Defined	2022-11-14
2022-06-30	$1,407,445,945	28,906,263	-11.6%	Shares	Defined	2022-08-15
2021-12-31	$1,711,911,060	32,713,760	+0.0%	Shares	Defined	2022-02-14
2021-09-30	$1,421,256,929	32,710,171	-0.0%	Shares	Defined	2021-11-15
2021-06-30	$1,384,412,509	32,712,961	+0.1%	Shares	Defined	2021-08-16
2021-03-31	$1,209,253,859	32,673,706	+12.2%	Shares	Defined	2021-05-14
2020-12-31	$858,256,045	29,113,163	-17.4%	Shares	Defined	2021-02-12
2020-09-30	$944,295,902	35,248,074	+0.0%	Shares	Defined	2020-11-13
2020-06-30	$919,774,701	35,240,410	+0.1%	Shares	Defined	2020-08-14
2020-03-31	$837,743,506	35,199,307	—	Shares	Defined	2020-05-15
No filing history on record for this holder in this stock.