HORIZON KINETICS ASSET MANAGEMENT LLC

Position in IRM — Iron Mountain Inc

CIK 1056823 NEW YORK, NY

Position in IRM

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$1,879,886

+$353,192 QoQ

Shares Held

18,405

0.0% QoQ

Ownership

0.006%

of shares outstanding

% of Portfolio

0.02%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Real Estate · as of Mar 31, 2026

HORIZON KINETICS ASSET MANAGEMENT LLC holds $6,113,489 across 5 REIT - Specialty names. IRM ranks #2 (30.7% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	FRMI	Fermi Inc.	532,426	$3,109,367
2	IRM	Iron Mountain Inc This page	18,405	$1,879,886
3	RYN	Rayonier Inc	30,536	$629,652
4	WY	Weyerhaeuser Co	10,355	$252,972
5	AMT	American Tower Corp /Ma/	1,400	$241,612

25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$1,879,886	18,405	0.0%	Shares	Defined	2026-05-15
2025-12-31	$1,526,694	18,405	-5.4%	Shares	Defined	2026-02-11
2025-09-30	$1,983,242	19,455	-40.1%	Shares	Defined	2025-11-14
2025-06-30	$3,328,909	32,455	0.0%	Shares	Defined	2025-08-12
2025-03-31	$2,792,428	32,455	-1.4%	Shares	Defined	2025-05-15
2024-12-31	$3,458,119	32,900	-4.5%	Shares	Defined	2025-02-10
2024-09-30	$4,093,693	34,450	+42.9%	Shares	Defined	2024-11-13
2024-06-30	$2,159,842	24,100	-1.6%	Shares	Defined	2024-08-14
2024-03-31	$1,965,145	24,500	-7.4%	Shares	Defined	2024-05-14
2023-12-31	$1,850,971	26,450	-3.3%	Shares	Defined	2024-02-15
2023-09-30	$1,626,433	27,358	0.0%	Shares	Defined	2023-11-14
2023-06-30	$1,554,481	27,358	0.0%	Shares	Defined	2023-08-14
2023-03-31	$1,447,511	27,358	-0.5%	Shares	Defined	2023-05-12
2022-12-31	$1,371,273	27,508	0.0%	Shares	Defined	2023-02-09
2022-09-30	$1,209,526	27,508	-0.2%	Shares	Defined	2022-11-15
2022-06-30	$1,341,799	27,558	-0.4%	Shares	Defined	2022-08-05
2022-03-31	$1,532,529	27,658	+9.7%	Shares	Defined	2022-05-13
2021-12-31	$1,319,134	25,208	+1.4%	Shares	Defined	2022-02-15
2021-09-30	$1,080,080	24,858	-6.8%	Shares	Defined	2021-11-15
2021-06-30	$1,128,166	26,658	0.0%	Shares	Defined	2021-08-16
2021-03-31	$986,612	26,658	+7.5%	Shares	Defined	2021-05-11
2020-12-31	$731,339	24,808	+21.1%	Shares	Defined	2021-02-16
2020-09-30	$548,873	20,488	+25.2%	Shares	Defined	2020-11-16
2020-06-30	$426,943	16,358	-12.8%	Shares	Defined	2020-08-14
2020-03-31	$446,440	18,758	—	Shares	Defined	2020-05-13
No filing history on record for this holder in this stock.