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 60.1%. Over the past 90 days, insiders made 5 sales worth $3.8M.

Shares Outstanding

297.479M

Shares Float

218.906M

Insider Shares Owned

6.008M

Insider % Owned

2.0%

Institutional Shares Held

178.819M

Institutional % Held

60.1%

Ownership Breakdown

Net Insider Activity by Month

Purchases (90d)

Sales (90d)

$3.8M total

Net Activity

Net Selling

Net Value (90d)

-$3.8M

Iron Mountain Insider Transactions (Last 6 Months)

See all insider trades →

Date	Insider	Title	Type	Shares	Price	Value
Oct 1, 2026	Christine Zhang under Power of Attorney dated February 27, 2025, from William Meaney	PRESIDENT AND CEO	SELL-OPTIONS	—	$73.72	$2.8M
Oct 1, 2026	Christine Zhang under Power of Attorney dated June 19, 2025, from Greg McIntosh	EVP, CHIEF COMMERCIAL OFFICER	SELL	5.000K	$110.72	$554K
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

Congressional Trading Activity

See all government trades →

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

Iron Mountain Inc