Iron Mountain Incorporated Announces Tax Treatment of 2021 Distributions

BOSTON--(BUSINESS WIRE)-- Iron Mountain Incorporated (NYSE: IRM), the leading information management company, today announced the tax treatment for all 2021 distributions on its common stock.

		Form 1099 Box 1a	Form 1099 Box 1b	Form 1099 Box 2a	Form 1099 Box 2b	Form 1099 Box 2f	Form 1099 Box 3	Form 1099 Box 5
Payment Date	Total Distribution	Ordinary Taxable Dividend	Qualified Taxable Dividend (1)	Total Capital Gain Distribution	Unrecaptured Sec. 1250 Gain (2)	Section 897 Capital Gain (2)	Return of Capital	Section 199A Dividend (1)
	($ per share)	($ per share)	($ per share)	($ per share)	($ per share)	($ per share)	($ per share)	($ per share)
Jan 6, 2021	$0.618500	$0.413550	$0.080546	$0.134861	$0.017664	$0.028941	$0.070089	$0.333004
Apr 6, 2021	$0.618500	$0.413550	$0.080546	$0.134861	$0.017664	$0.028941	$0.070089	$0.333004
Jul 6, 2021	$0.618500	$0.413550	$0.080546	$0.134861	$0.017664	$0.028941	$0.070089	$0.333004
Oct 6, 2021	$0.618500	$0.413550	$0.080546	$0.134861	$0.017664	$0.028941	$0.070089	$0.333004
Totals	$2.474000	$1.654200	$0.322184	$0.539444	$0.070656	$0.115764	$0.280356	$1.332016

(1)	Qualified Taxable Dividend and Section 199A Dividend are subsets of, and included in, Ordinary Taxable Dividend.
(2)	Unrecaptured Section 1250 Gain and Section 897 Capital Gain are subsets of, and included in, Total Capital Gain Distribution.

If you held common stock of Iron Mountain in your name at any time during 2021, an IRS Form 1099-DIV will be provided to you by Computershare, Iron Mountain's transfer agent. If you held shares in "street name" during 2021, the IRS form provided by your bank, brokerage firm or nominee may report only the gross distributions paid to you. Therefore, you may need the information included in this press release to properly complete your federal tax return.

Please note that federal tax laws affect taxpayers differently, and we cannot advise you on how distributions should be reported on your federal income tax return. Please also note that state and local taxation of REIT distributions vary and may not be the same as the federal treatment.

About Iron Mountain

Iron Mountain Incorporated (NYSE: IRM) is the global leader in innovative storage and information management services, storing and protecting billions of valued assets, including critical business information, highly sensitive data, and cultural and historical artifacts. Founded in 1951 and trusted by more than 225,000 customers worldwide, Iron Mountain helps customers CLIMB HIGHER™ to transform their businesses. Through a range of services including digital transformation, data centers, secure records storage, information management, IT Asset Lifecycle Management, secure destruction, and art storage and logistics, Iron Mountain helps businesses bring light to their dark data, enabling customers to unlock value and intelligence from their stored digital and physical assets at speed and with security, while helping them meet their environmental goals. To learn more about Iron Mountain, please visit: www.IronMountain.com and follow @IronMountain on Twitter and LinkedIn.

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Investor Relations Contact:



Gillian Tiltman

Senior Vice President and Head of Investor Relations

Gillian.Tiltman@ironmountain.com

(617) 286-4881



Sarah Barry

Manager, Investor Relations

Sarah.Barry@ironmountain.com

(617) 237-6597

Source: Iron Mountain Incorporated