Iron Mountain Ownership & Insider Activity

Iron Mountain (IRM) institutional and insider ownership, recent insider transactions and ownership breakdown.

Insiders own 2.0% of shares outstanding. Institutional investors hold 61.0%. Over the past 90 days, insiders made 5 sales worth $4.0M.

Shares Outstanding

297.479M

Shares Float

218.906M

Insider Shares Owned

6.019M

Insider % Owned

2.0%

Institutional Shares Held

181.729M

Institutional % Held

61.0%

Ownership Breakdown

Net Insider Activity by Month

Purchases (90d)

Sales (90d)

$4.0M total

Net Activity

Net Selling

Net Value (90d)

-$4.0M

Iron Mountain Insider Transactions (Last 6 Months)

Date	Insider	Title	Type	Shares	Price	Value
Sep 1, 2026	Christine Zhang under Power of Attorney dated February 27, 2025, from William Meaney	PRESIDENT AND CEO	SELL-OPTIONS	—	$75.54	$3.0M
Sep 1, 2026	Christine Zhang under Power of Attorney dated June 19, 2025, from Greg McIntosh	EVP, CHIEF COMMERCIAL OFFICER	SELL	5.000K	$115.60	$578K
Sep 1, 2026	Mark Kidd	EVP, GM DATA CENTERS & ALM	SELL	6.000K	$115.60	$694K
Aug 7, 2026	Christine Zhang under Power of Attorney dated February 27, 2025, from William Meaney	PRESIDENT AND CEO	SELL-OPTIONS	—	$79.33	$3.3M
Aug 7, 2026	Mark Kidd	EVP, GM DATA CENTERS & ALM	SELL	6.000K	$122.70	$736K
Aug 6, 2026	Christine Zhang under Power of Attorney dated June 19, 2025, from Greg McIntosh	EVP, CHIEF COMMERCIAL OFFICER	SELL	5.000K	$82.06	$1.3M
Jul 1, 2026	Christine Zhang under Power of Attorney dated February 27, 2025, from William Meaney	PRESIDENT AND CEO	SELL-OPTIONS	—	$79.92	$3.3M
Jul 1, 2026	Mark Kidd	EVP, GM DATA CENTERS & ALM	SELL	6.000K	$125.62	$754K
Jun 1, 2026	Christine Zhang under Power of Attorney dated February 27, 2025, from William Meaney	PRESIDENT AND CEO	SELL-OPTIONS	—	$82.28	$3.5M
Jun 1, 2026	Mark Kidd	EVP, GM DATA CENTERS & ALM	SELL	6.000K	$126.70	$760K
May 21, 2026	Daniel Borges	SVP & CHIEF ACCOUNTING OFFICER	SELL	7.189K	$125.50	$902K
May 20, 2026	Walter C Rakowich	DIRECTOR	SELL	757.000	$124.45	$94K
May 12, 2026	Pamela M Arway	DIRECTOR	SELL	1.892K	$128.97	$244K
May 8, 2026	Christine Zhang under Power of Attorney dated February 27, 2025, from William Meaney	PRESIDENT AND CEO	SELL-OPTIONS	—	$82.97	$3.5M
May 8, 2026	Mark Kidd	EVP, GM DATA CENTERS & ALM	SELL	6.000K	$127.91	$767K
Apr 1, 2026	Christine Zhang under Power of Attorney dated February 27, 2025, from William Meaney	PRESIDENT AND CEO	SELL-OPTIONS	—	$69.85	$2.5M
Apr 1, 2026	Mark Kidd	EVP, GM DATA CENTERS & ALM	SELL	6.000K	$102.71	$616K
Mar 19, 2026	Mithu Bhargava	EVP, GM DIGITAL BUSINESS UNIT	SELL	59.725K	$104.62	$6.2M
Mar 5, 2026	Christine Zhang under Power of Attorney dated February 27, 2025, from William Meaney	PRESIDENT AND CEO	SELL	98.657K	$106.25	$10.5M

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Congressional Trading Activity

Date	Member	Party	Chamber	Action	Amount
Feb 4, 2026	Markwayne Mullin	R	Senate	S	$1,001 - $15,000
Dec 18, 2025	Markwayne Mullin	R	Senate	S	$1,001 - $15,000
Dec 18, 2025	Markwayne Mullin	R	Senate	S	$15,001 - $50,000
Feb 3, 2025	Markwayne Mullin	R	Senate	P	$1,001 - $15,000
Jan 2, 2025	Markwayne Mullin	R	Senate	P	$15,001 - $50,000
Jan 2, 2025	Markwayne Mullin	R	Senate	P	$15,001 - $50,000
Dec 11, 2023	Thomas R. Carper	D	Senate	S (Partial)	$1,001 - $15,000

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