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Iron Mountain IRM

Iron Mountain is the 306th largest S&P 500 company by market cap, worth $32.7 billion. 11 directors have filed with the SEC in the last 12 months (who counts), 1 of them an executive. 7 other officers are on file. At 30 Jun 2026, Vanguard was its largest institutional holder, with 16.1% of the company.

CEO
William L. Meaney
Sector
Real Estate
Sub-industry
Other Specialized REITs
Headquarters
Portsmouth, New Hampshire
Founded
1951
More
Wikipedia
Market cap
$32.7B
306th largest, 23 Oct 2026 close
Revenue
$6.9B
Fiscal year 2025
Price to sales
4.7
Less useful for REITs
Employees
29,400
REIT: property staff may not be counted
Market cap per employee
$1.1M
Not comparable for REITs
Connections
9
S&P 500 companies sharing a director or officer

Largest institutional holders

Each fund group's share of Iron Mountain. Where a company has several share classes, the share is of its total value.

13F filings for the quarter to 30 Jun 2026

These five hold 40.2% of Iron Mountain.

Source: SEC Form 13F data sets, SEC XBRL shares outstanding 路 All holders

Board and officers

7 people here also hold roles at other S&P 500 companies.

Roles filed up to 30 Sep 2026

NameTitle
Directors (11)
William L. MeaneyPresident and CEOAlso at State StreetPresident and CEO
Jennifer AllertonDirectorDirector
Pamela M. ArwayDirectorAlso at DaVitaDirector
Kent P. DautenDirectorDirector
June Yee FelixDirectorDirector
Monte E. FordDirectorAlso at CenteneDirector
Christie B. KellyDirectorDirector
Robin MatlockDirectorAlso at MSCIDirector
Walter C. RakowichDirectorAlso at Host Hotels & Resorts and VentasDirector
Theodore R. Samuels IIDirectorAlso at Bristol Myers Squibb and CenteneDirector
Doyle SimonsDirectorAlso at Fiserv and Union PacificDirector
Officers (7)
Barry HytinenEVP and CFOLast filed 3 Mar 2026EVP and CFO
Michelle Vervais AltamuraEVP, General Counsel, SecLast filed 3 Mar 2026EVP, General Counsel, Sec
Mithu BhargavaEVP, GM Digital Business UnitLast filed 23 Mar 2026EVP, GM Digital Business Unit
Daniel BorgesSVP & Chief Accounting OfficerLast filed 26 May 2026SVP & Chief Accounting Officer
Jemma JohnsEVP, CHROLast filed 6 Jan 2026EVP, CHRO
Mark KiddEVP, GM Data Centers & ALMLast filed 2 Sep 2026EVP, GM Data Centers & ALM
Greg W. McIntoshEVP, Chief Commercial OfficerLast filed 2 Sep 2026EVP, Chief Commercial Officer

Source: SEC insider filings (Forms 3, 4 and 5), Iron Mountain's Form 4 filings 路 All directors and officers

Companies that share people with Iron Mountain

Each person's title here, then at the other company.

  • Centene CNC
    • Monte E. Ford: Director here, Director there
    • Theodore R. Samuels II: Director here, Director there
  • Bristol Myers Squibb BMY
    • Theodore R. Samuels II: Director here, Director there
  • DaVita DVA
    • Pamela M. Arway: Director here, Director there
  • Fiserv FISV
    • Doyle Simons: Director here, Director there
  • Host Hotels & Resorts HST
    • Walter C. Rakowich: Director here, Director there
  • MSCI MSCI
    • Robin Matlock: Director here, Director there
  • State Street STT
    • William L. Meaney: President and CEO here, Director there
  • Union Pacific UNP
    • Doyle Simons: Director here, Director there
  • Ventas VTR
    • Walter C. Rakowich: Director here, Director there

Source: SEC insider filings 路 See the whole network

Iron Mountain's market cap since December 2008

Marked weeks are changes in the share count, such as a merger, not market moves.

Weekly, up to 23 Oct 2026

Show equal percentage changes as equal steps.
201020122014201620182020202220242026$32.7B

Source: Yahoo Finance closing prices, SEC XBRL shares outstanding

Workforce

Headcount at 31 Dec 2025

Employees
29,400
In the US
11,700
As of December 31, 2025, we employed approximately 11,700 employees in the United States and approximately 17,700 employees outside of the United States.
Iron Mountain Form 10-K

Source: Iron Mountain Form 10-K

Insider trades

Open-market buys and sales by directors and officers. Grants, option exercises and shares withheld for tax are left out.

Trades from 30 Sep 2025 to 30 Sep 2026

Directors and officers sold $120 million of stock in 35 sales and bought $2,954 in 1 purchase in the 12 months to 30 Sep 2026.

DatePersonTitleTypeSharesValue
1 Sep 2026SaleWilliam L. MeaneyPresident and CEOPresident and CEOSale38,474$4.4M
1 Sep 2026SaleMark KiddEVP, GM Data Centers & ALMEVP, GM Data Centers & ALMSale6,000$694K
1 Sep 2026SaleGreg W. McIntoshEVP, Chief Commercial OfficerEVP, Chief Commercial OfficerSale5,000$578K
7 Aug 2026SaleWilliam L. MeaneyPresident and CEOPresident and CEOSale38,474$4.7M
7 Aug 2026SaleMark KiddEVP, GM Data Centers & ALMEVP, GM Data Centers & ALMSale6,000$736K
6 Aug 2026SaleGreg W. McIntoshEVP, Chief Commercial OfficerEVP, Chief Commercial OfficerSale11,839$1.5M
1 Jul 2026SaleWilliam L. MeaneyPresident and CEOPresident and CEOSale38,474$4.7M
1 Jul 2026SaleMark KiddEVP, GM Data Centers & ALMEVP, GM Data Centers & ALMSale6,000$754K
1 Jun 2026SaleWilliam L. MeaneyPresident and CEOPresident and CEOSale38,474$4.9M
1 Jun 2026SaleMark KiddEVP, GM Data Centers & ALMEVP, GM Data Centers & ALMSale6,000$760K

Showing 10 of 36 trades

Source: SEC insider transactions data sets, Iron Mountain's Form 4 filings

Trades by members of Congress and officials

Trades members of Congress and senior executive branch officials disclosed, including their families'. Amounts are filed as ranges.

Trades from 20 Oct 2023 to 20 Oct 2026

2 people disclosed 10 purchases and 5 sales of Iron Mountain stock since October 2023.

DateMember or officialTypeAmount
4 Feb 2026Markwayne Mullin (Senate, R-OK)Senate, R-OK 路 SoldSale$1,001 to $15,000$1K to $15K
29 Jan 2026Rohit Khanna (House, D-CA)House, D-CA 路 SoldSale$1,001 to $15,000$1K to $15K
23 Jan 2026Rohit Khanna (House, D-CA)House, D-CA 路 BoughtPurchase$1,001 to $15,000$1K to $15K
18 Dec 2025Markwayne Mullin (Senate, R-OK)Senate, R-OK 路 SoldSale$15,001 to $50,000$15K to $50K
18 Dec 2025Markwayne Mullin (Senate, R-OK)Senate, R-OK 路 SoldSale$1,001 to $15,000$1K to $15K
12 Dec 2025Rohit Khanna (House, D-CA)House, D-CA 路 BoughtPurchase$1,001 to $15,000$1K to $15K
5 Dec 2025Rohit Khanna (House, D-CA)House, D-CA 路 SoldSale$1,001 to $15,000$1K to $15K
29 Sep 2025Rohit Khanna (House, D-CA)House, D-CA 路 BoughtPurchase$1,001 to $15,000$1K to $15K
26 Aug 2025Rohit Khanna (House, D-CA)House, D-CA 路 BoughtPurchase$1,001 to $15,000$1K to $15K
25 Jul 2025Rohit Khanna (House, D-CA)House, D-CA 路 BoughtPurchase$1,001 to $15,000$1K to $15K

Showing 10 of 15 trades

Source: House, Senate and OGE disclosures via the Congress trading monitor

WARN layoff notices

Notices filed under Iron Mountain's own name. Subsidiaries that file under their own names are not included.

Notices from 26 Oct 2023 to 26 Oct 2026

Iron Mountain filed 1 notice covering 64 workers since October 2023.

NoticePlaceWorkersEffective
30 Apr 2024Sterling, VA6428 Jun 2024

Source: State WARN notices via the US layoffs tracker