Madison Asset Management, LLC

Position in IRM — Iron Mountain Inc

CIK 1299351 MADISON, WI

Position in IRM

as of Jun 30, 2026 · filed Aug 10, 2026 Compact

Position Value

$2,153,838

+$412,147 QoQ

Shares Held

17,052

0.0% QoQ

Ownership

0.006%

of shares outstanding

% of Portfolio

0.03%

of 13F equity value

Holder Rank

#381

of 1,157 holders

Holding Since

Mar 2020

26 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Real Estate · as of Jun 30, 2026

Madison Asset Management, LLC holds $11,738,449 across 3 REIT - Specialty names. IRM ranks #3 (18.3% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	WY	Weyerhaeuser Co	207,000	$4,955,580
2	AMT	American Tower Corp /Ma/	28,300	$4,629,031
3	IRM	Iron Mountain Inc This page	17,052	$2,153,838

26 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$2,153,838	17,052	0.0%	Shares	Sole	2026-08-10
2026-03-31	$1,741,691	17,052	0.0%	Shares	Sole	2026-05-07
2025-12-31	$1,414,463	17,052	-5.1%	Shares	Sole	2026-02-04
2025-09-30	$1,830,842	17,960	-3.1%	Shares	Sole	2025-11-06
2025-06-30	$1,900,724	18,531	0.0%	Shares	Sole	2025-08-11
2025-03-31	$1,594,407	18,531	-24.0%	Shares	Sole	2025-05-06
2024-12-31	$2,561,425	24,369	0.0%	Shares	Sole	2025-02-10
2024-09-30	$2,895,768	24,369	-19.0%	Shares	Sole	2024-11-12
2024-06-30	$2,696,038	30,083	0.0%	Shares	Sole	2024-08-09
2024-03-31	$2,412,957	30,083	0.0%	Shares	Sole	2024-05-09
2023-12-31	$2,105,208	30,083	-1.0%	Shares	Sole	2024-02-12
2023-09-30	$1,807,398	30,402	-0.2%	Shares	Sole	2023-11-13
2023-06-30	$1,731,475	30,473	0.0%	Shares	Sole	2023-08-01
2023-03-31	$1,612,326	30,473	-12.6%	Shares	Sole	2023-04-26
2022-12-31	$1,738,319	34,871	-2.0%	Shares	Sole	2023-02-08
2022-09-30	$1,565,288	35,599	-0.4%	Shares	Sole	2022-11-10
2022-06-30	$1,740,083	35,738	-1.2%	Shares	Sole	2022-08-09
2022-03-31	$2,004,622	36,178	+0.0%	Shares	Sole	2022-05-12
2021-12-31	$1,892,252	36,160	+7.5%	Shares	Sole	2022-02-15
2021-09-30	$1,460,875	33,622	+4.3%	Shares	Sole	2021-11-12
2021-06-30	$1,363,635	32,222	+4.0%	Shares	Sole	2021-08-09
2021-03-31	$1,147,161	30,996	+3.0%	Shares	Sole	2021-05-11
2020-12-31	$886,846	30,083	0.0%	Shares	Sole	2021-02-12
2020-09-30	$805,923	30,083	0.0%	Shares	Sole	2020-11-12
2020-06-30	$785,166	30,083	+42.7%	Shares	Sole	2020-08-13
2020-03-31	$501,775	21,083	—	Shares	Sole	2020-05-12
No filing history on record for this holder in this stock.