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Stock
IRM
IRON MOUNTAIN INCReal EstateOther Specialized REITsLatest close $1247 of 27 marquee funds currently hold1 CUSIP mapped
Current holders
7
27 funds tracked
Ever held
10
Current + past
New this quarter
2
Exited this quarter
1
Marquee-fund ownership over time
Aug 11, 2015Feb 14, 2020Feb 13, 2025May 15, 2026
Now
7
This quarter's activity
New positions opened
Positions exited
Current holders
Sorted by tenure (longest first)| Fund | First disclosed | Held | Entry price | Latest close | Return on entry |
|---|---|---|---|---|---|
| Bridgewater Associates re-entered | Q3 2015 | 44Q | $16 | $124 | +684% |
| AQR Capital Management | Q3 2024(8Q snapshot) | 7Q | $103 | $124 | +21% |
| Millennium Management | Q3 2024(8Q snapshot) | 7Q | $103 | $124 | +21% |
| Citadel Advisors | Q4 2024(8Q snapshot) | 6Q | $108 | $124 | +15% |
| Point72 Asset Management | Q4 2024(8Q snapshot) | 6Q | $108 | $124 | +15% |
| Renaissance Technologies re-entered | Q2 2025(8Q snapshot) | 4Q | $94 | $124 | +32% |
| Two Sigma Investments re-entered | Q2 2025(8Q snapshot) | 4Q | $96 | $124 | +29% |
“Return on entry” is the price-only move from the fund's first disclosure to today — it ignores any adds, trims, or dividends. A fund that built its position over multiple quarters has a true cost basis somewhere between entry price and latest close; this figure is the upper bound.
Past holders
Funds that exited at some point| Fund | Last entry | Exited | Entry → Exit | Return |
|---|---|---|---|---|
| D.E. Shaw 2× in & out | Q1 2025 | Q2 2026 | → $125 | +37% |
| Maverick Capital | Q1 2024 | Q3 2024 | → $103 | +63% |
| Coatue Management | Q1 2020 | Q2 2020 | → $17 | -31% |
Insider activity
Form 4 — officers, directors, 10%+ ownersFiled within two business days of each transaction by anyone with material insider status at IRON MOUNTAIN INC. Pair with the holders table above as a sanity check: heavy insider buying alongside marquee-fund accumulation is the strongest accumulation signal; heavy insider selling alongside fund exits is the strongest distribution signal.
Filings · last 30d
18
Filings · last 90d
25
Total on file
668
Recent SEC buffer
Most recent
Jun 2, 2026
30d / 90d windows measured from Jun 2, 2026 — the most recent Form 4 on file — not from today.
- Form 40001566391-26-000018Jun 2, 2026
- Form 40001732058-26-000015Jun 2, 2026
- Form 40001720656-26-000007May 26, 2026
- Form 40001020569-26-000059May 21, 2026
- Form 40001020569-26-000057May 13, 2026
- Form 40001566391-26-000016May 12, 2026
- Form 40001732058-26-000013May 11, 2026
- Form 40001020569-26-000051May 11, 2026
- Form 40001020569-26-000049May 11, 2026
- Form 40001609417-26-000002May 11, 2026
- Form 40001049128-26-000002May 11, 2026
- Form 40001781215-26-000013May 11, 2026
- Form 40001020569-26-000047May 11, 2026
- Form 40001020569-26-000045May 11, 2026
- Form 40001020569-26-000043May 11, 2026
Showing 15 of 668 recent Form 4 filings. Browse all on EDGAR ↗
Fundamentals
XBRL · IRON MOUNTAIN INCAnnual figures sourced directly from IRON MOUNTAIN INC's 10-K / 10-Q filings via SEC EDGAR XBRL. Latest fiscal year and the year-over-year change, with up to ten years of history.
Revenue
$6.9B
FY2025+12% YoY
Net income
-$53.9M
FY2010-124% YoY
EPS (diluted)
$0.4900
FY2025-20% YoY
Free cash flow(?)
-$931.63M
FY2025-57% YoY
Recent SEC filings
10-K · 10-Q · 8-K · 13D/G · proxyThe most recent material filings for IRON MOUNTAIN INC — earnings, material events, ownership disclosures, proxy statements. Form 4 insider activity is shown in the panel above.
- 8-KMaterial eventMay 12, 2026
- 10-QQuarterly reportApr 30, 2026
- 8-KMaterial eventApr 30, 2026
- DEF 14AProxy statementMar 24, 2026
- 8-KMaterial eventMar 9, 2026
- 10-KAnnual reportFeb 12, 2026
- 8-KMaterial eventFeb 12, 2026
- 8-KMaterial eventNov 13, 2025
- 10-QQuarterly reportNov 5, 2025
- 8-KMaterial eventNov 5, 2025
- 8-KMaterial eventOct 21, 2025
- 8-KMaterial eventSep 10, 2025
- 10-QQuarterly reportAug 6, 2025
- 8-KMaterial eventAug 6, 2025
- 8-KMaterial eventJun 20, 2025
Trade history
Every open→close lifecycle across tracked funds| Fund | Open date | Close date | Open price | Close price / current | Return |
|---|---|---|---|---|---|
| Bridgewater Associates | Q2 2026 | open | $125 | $128 | +2% |
| Renaissance Technologies | Q2 2026 | open | $128 | $124 | -3% |
| Two Sigma Investments | Q1 2026 | open | $108 | $124 | +15% |
| Two Sigma Investments | Q2 2025 | Q3 2025 | $96 | $89 | -7% |
| Renaissance Technologies | Q2 2025 | Q3 2025 | $94 | $91 | -3% |
| D.E. Shaw | Q1 2025 | Q2 2026 | $91 | $125 | +37% |
| Bridgewater Associates | Q1 2025 | Q2 2025 | $91 | $94 | +3% |
| Citadel Advisors | Q4 2024 | open | $108 | $124 | +15% |
| Point72 Asset Management | Q4 2024 | open | $108 | $124 | +15% |
| D.E. Shaw | Q3 2024 | Q4 2024 | $103 | $108 | +5% |
| AQR Capital Management | Q3 2024 | open | $103 | $124 | +21% |
| Millennium Management | Q3 2024 | open | $103 | $124 | +21% |
| Maverick Capital | Q1 2024 | Q3 2024 | $63 | $103 | +63% |
| Bridgewater Associates | Q1 2022 | Q2 2023 | $37 | $50 | +34% |
| Bridgewater Associates | Q2 2020 | Q4 2020 | $17 | $20 | +18% |
| Coatue Management | Q1 2020 | Q2 2020 | $24 | $17 | -31% |
| Bridgewater Associates | Q3 2019 | Q1 2020 | $22 | $25 | +12% |
| Bridgewater Associates | Q2 2018 | Q2 2019 | $21 | $22 | +4% |
| Bridgewater Associates | Q3 2017 | Q4 2017 | $23 | $26 | +10% |
| Bridgewater Associates | Q3 2015 | Q4 2015 | $16 | $16 | +2% |
Caveats
- Covers only the 27 marquee funds tracked here, not the full institutional universe. A “0 holders” reading does not mean unowned.
- Heavy funds (Renaissance Technologies, Citadel Advisors, Soros Fund Management, Two Sigma Investments, D.E. Shaw, AQR Capital Management, Millennium Management, Point72 Asset Management) use 8-quarter snapshots, so their pre-2024 history is missing.
- “Current” reflects each fund's most recent 13F — filings lag the actual trade by up to 45 days; positions shown may have changed since.
- Cost = price at the entry filing date. Re-entered positions show the most recent open lot.
- Options, ADRs, and unmapped CUSIPs are excluded from the follower-backtest pipeline that produces these snapshots, so certain holding types won't appear here.