IRM · Insider trading · 13F holders · Congress trades
Iron Mountain Inc (IRM)
Who is buying and selling IRM: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 89
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $17.4M
- Congress trades, 12 months
- 3
IRM at a glance
- Between Aug 1, 2026 and Oct 29, 2026, 3 IRM insiders filed 8 sales worth $17.4M on SEC Form 4, and no open-market purchases; 8 of the sales were pre-planned under Rule 10b5-1.
- 89 13F filers hold IRM among their 50 largest positions, worth $3.4B combined. The biggest bets by portfolio weight are Vert Asset Management LLC (4.9%), Contour Asset Management LLC (3.8%) and Marble Harbor Investment Counsel, LLC (3.8%). In their latest 13Fs, 2 managers opened a new position and 5 added to one.
- Members of Congress have disclosed 35 IRM trades since 2014, 0 purchases and 3 sales in the past year; the latest was Markwayne Mullin (R-OK), selling $1K–15K on Feb 4, 2026.
- IRM last closed at $118.38 on Oct 29, 2026.
IRM insider trading
Between Aug 1, 2026 and Oct 29, 2026, 3 IRM insiders filed 8 sales worth $17.4M on SEC Form 4, and no open-market purchases; 8 of the sales were pre-planned under Rule 10b5-1.
| Filed | Insider | Role | Trade | Shares | Price | Value | Form 4 |
|---|---|---|---|---|---|---|---|
| Oct 5, 2026 | Meaney William L | President and CEO, Director | Sale10b5-1 | 38,474 | $110.45 | $4.2M | SEC |
| Oct 5, 2026 | McIntosh Greg W | EVP, Chief Commercial Officer | Sale10b5-1 | 5,000 | $110.72 | $554K | SEC |
| Sep 2, 2026 | Meaney William L | President and CEO, Director | Sale10b5-1 | 38,474 | $114.08 | $4.4M | SEC |
| Sep 2, 2026 | Kidd Mark | EVP, GM Data Centers & ALM | Sale10b5-1 | 6,000 | $115.60 | $694K | SEC |
| Sep 2, 2026 | McIntosh Greg W | EVP, Chief Commercial Officer | Sale10b5-1 | 5,000 | $115.60 | $578K | SEC |
| Aug 10, 2026 | Meaney William L | President and CEO, Director | Sale10b5-1 | 38,474 | $121.67 | $4.7M | SEC |
| Aug 10, 2026 | McIntosh Greg W | EVP, Chief Commercial Officer | Sale10b5-1 | 11,839 | $127.13 | $1.5M | SEC |
| Aug 10, 2026 | Kidd Mark | EVP, GM Data Centers & ALM | Sale10b5-1 | 6,000 | $122.70 | $736K | SEC |
Who owns IRM? Hedge funds and superinvestors
89 13F filers hold IRM among their 50 largest positions, worth $3.4B combined. The biggest bets by portfolio weight are Vert Asset Management LLC (4.9%), Contour Asset Management LLC (3.8%) and Marble Harbor Investment Counsel, LLC (3.8%). In their latest 13Fs, 2 managers opened a new position and 5 added to one.
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Cohen & Steers, Inc.Investment manager | 2.4% | $1.5B | 12,019,735 | -25.7% shares | Q2 2026 |
| Centersquare Investment Management LLCInstitutional asset manager | 2.5% | $293.5M | 2,323,974 | +0.6% shares | Q2 2026 |
| Daiwa Securities Group Inc.Broker-dealer | 0.5% | $215.4M | 1,941,681 | +4.3% shares | Q3 2026 |
| Duff & Phelps Investment Management CoMutual fund manager | 1.7% | $183.8M | 1,455,435 | -7.6% shares | Q2 2026 |
| Contour Asset Management LLCHedge fund | 3.8% | $161.0M | 1,274,684 | -11.8% shares | Q2 2026 |
| Cbre Investment Management Listed Real Assets LLCAsset manager | 1.9% | $135.5M | 1,072,881 | -13.3% shares | Q2 2026 |
| APG Asset Management US Inc.Hedge fund | 0.6% | $85.8M | 703,912 | +0.0% shares | Q2 2026 |
| PGGM InvestmentsAsset manager | 2.1% | $85.3M | 675,093 | -50.7% shares | Q2 2026 |
| Welch & Forbes LLCWealth manager | 1.0% | $80.8M | 639,322 | -2.0% shares | Q2 2026 |
| DigitalBridge Group, Inc.Investment manager | 3.5% | $57.7M | 457,126 | -9.3% shares | Q2 2026 |
| Heitman Real Estate Securities LLCInstitutional asset manager | 2.9% | $45.2M | 357,721 | +37.8% shares | Q2 2026 |
| Adelante Capital Management LLCInstitutional asset manager | 2.7% | $41.1M | 325,641 | -8.8% shares | Q2 2026 |
| Adell Harriman & Carpenter IncWealth manager | 2.0% | $40.0M | 316,465 | +0.2% shares | Q2 2026 |
| Marble Harbor Investment Counsel, LLCWealth manager | 3.8% | $37.3M | 295,533 | -1.6% shares | Q2 2026 |
| Apollo Management Holdings, L.P.Hedge fund | 0.5% | $33.5M | 265,539 | +0.0% shares | Q2 2026 |
| Summit Partners Public Asset Management, LLCHedge fund | 0.8% | $29.8M | 235,567 | — | Q2 2026 |
| Americana Partners, LLCWealth manager | 0.6% | $27.0M | 243,675 | +1.0% shares | Q3 2026 |
| Reaves W H & Co IncInvestment manager | 0.4% | $26.8M | 212,533 | -0.5% shares | Q2 2026 |
| Moran Wealth Management, LLCWealth manager | 0.5% | $18.2M | 163,874 | +0.3% shares | Q3 2026 |
| Tectonic Advisors LLCWealth manager | 0.8% | $18.2M | 163,750 | +0.8% shares | Q3 2026 |
| Gillson Capital LPHedge fund | 1.0% | $17.4M | 137,932 | — | Q2 2026 |
| United BankBank & trust | 2.0% | $17.0M | 134,721 | -4.9% shares | Q2 2026 |
| Vert Asset Management LLCMutual fund manager | 4.9% | $16.7M | 150,287 | -2.7% shares | Q3 2026 |
| Sargent Investment Group, LLCWealth manager | 2.0% | $16.7M | 131,883 | -2.0% shares | Q2 2026 |
| Ar Asset Management IncWealth manager | 3.0% | $16.5M | 130,600 | +0.0% shares | Q2 2026 |
| TCV Trust & Wealth Management, Inc.Wealth manager | 1.2% | $15.3M | 137,523 | -1.6% shares | Q3 2026 |
| O'Neil Global Advisors, Inc.Institutional asset manager | 3.2% | $14.3M | 113,164 | New | Q2 2026 |
| Uniplan Investment Counsel, Inc.Wealth manager | 1.2% | $12.4M | 98,324 | — | Q2 2026 |
| Intrinsic Edge Capital Management LLCHedge fund | 1.3% | $10.7M | 84,515 | -30.6% shares | Q2 2026 |
| Barometer Capital Management Inc.Asset manager | 2.2% | $7.8M | 61,400 | — | Q2 2026 |
The 30 largest of 89 positions, by value. Each manager counts with its latest 13F (Q3 2026: 34, Q2 2026: 55). Screen IRM in the grand portfolio →
IRM stock trades by members of Congress
Members of Congress have disclosed 35 IRM trades since 2014, 0 purchases and 3 sales in the past year; the latest was Markwayne Mullin (R-OK), selling $1K–15K on Feb 4, 2026.
| Filed | Member | Trade | Amount | Traded | Since |
|---|---|---|---|---|---|
| Mar 2, 2026 | Markwayne MullinR-OK · Senate | Sale | $1K–15K | Feb 4, 2026 | +28.8% |
| Jan 13, 2026 | Markwayne MullinR-OK · Senate | Sale | $15K–50K | Dec 18, 2025 | +47.1% |
| Jan 13, 2026 | Markwayne MullinR-OK · Senate | Sale | $1K–15K | Dec 18, 2025 | +47.1% |
| Feb 27, 2025 | Markwayne MullinR-OK · Senate | Buy | $1K–15K | Feb 3, 2025 | +15.3% |
| Jan 31, 2025 | Markwayne MullinR-OK · Senate | Buy | $15K–50K | Jan 2, 2025 | +10.8% |
| Jan 31, 2025 | Markwayne MullinR-OK · Senate | Buy | $15K–50K | Jan 2, 2025 | +10.8% |
| Jan 3, 2024 | Thomas R. CarperD-DE · Senate | Sale | $1K–15K | Dec 11, 2023 | +76.0% |
| Aug 13, 2023 | Daniel S. GoldmanD-NY · House | Sale | $1K–15K | Jul 12, 2023 | +95.4% |
| Mar 1, 2023 | Thomas R. CarperD-DE · Senate | Sale | $1K–15K | Feb 21, 2023 | +128.9% |
| Sep 2, 2022 | Carol D. MillerR-WV · House | Buy | $1K–15K | Mar 4, 2021 | +232.0% |
| Feb 3, 2022 | Thomas R. CarperD-DE · Senate | Sale | $1K–15K | Jan 18, 2022 | +163.1% |
| Aug 15, 2021 | Katherine M. ClarkD-MA · House | Sale | $1K–15K | Jul 27, 2021 | +163.9% |
| Aug 15, 2021 | Katherine M. ClarkD-MA · House | Sale | $1K–15K | Jul 27, 2021 | +163.9% |
| Aug 15, 2021 | Katherine M. ClarkD-MA · House | Sale | $1K–15K | Jun 4, 2021 | +153.9% |
| Aug 15, 2021 | Katherine M. ClarkD-MA · House | Sale | $1K–15K | Jun 4, 2021 | +153.9% |
| Jul 6, 2021 | Thomas R. CarperD-DE · Senate | Sale | $1K–15K | Jun 4, 2021 | +154.0% |
| May 17, 2021 | Thomas R. CarperD-DE · Senate | Buy | $1K–15K | Jul 9, 2020 | +343.1% |
| May 17, 2021 | Thomas R. CarperD-DE · Senate | Sale | $1K–15K | Apr 2, 2020 | +439.1% |
| Feb 13, 2021 | Dean PhillipsD-MN · House | Buy | $1K–15K | Jan 5, 2021 | +301.5% |
| Dec 28, 2020 | Katherine M. ClarkD-MA · House | Buy | $1K–15K | Nov 5, 2020 | +321.9% |
10 members have traded IRM: Markwayne Mullin, Thomas R. Carper, Daniel S. Goldman, Carol D. Miller, Katherine M. Clark, Dean Phillips, Donna E. Shalala, Gilbert Ray Cisneros, Jr. and others.
IRM questions and answers
Are insiders buying IRM stock?
Between Aug 1, 2026 and Oct 29, 2026, 3 IRM insiders filed 8 sales worth $17.4M on SEC Form 4, and no open-market purchases; 8 of the sales were pre-planned under Rule 10b5-1.
Which hedge funds own IRM?
89 13F filers hold IRM among their 50 largest positions, worth $3.4B combined. The biggest bets by portfolio weight are Vert Asset Management LLC (4.9%), Contour Asset Management LLC (3.8%) and Marble Harbor Investment Counsel, LLC (3.8%). In their latest 13Fs, 2 managers opened a new position and 5 added to one.
Has Congress traded IRM?
Members of Congress have disclosed 35 IRM trades since 2014, 0 purchases and 3 sales in the past year; the latest was Markwayne Mullin (R-OK), selling $1K–15K on Feb 4, 2026.
Who is the largest holder of IRM?
Among 13F filers, Cohen & Steers, Inc. reports the largest IRM position, $1.5B (12,019,735 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Vert Asset Management LLC's: 4.9% of its portfolio.
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