IRON MTN INC DEL (IRM): Ownership & Insider Activity
Hedge funds and institutional managers reporting a position in IRM · Real Estate. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.
Reported Holders
25
13F filers
Aggregate Value
$604.2M
Across holders
Last Price
$111.55
2026-10-19
Sector
Real Estate
GICS
Quarterly fund activity11 increased14 reduced3 exited
| Manager⇅ | Type⇅ | Shares⇅ | Market Value▼ | % of Total⇅ | % of Portfolio⇅ | Action⇅ | QoQ Change⇅ | Quarter⇅ |
|---|---|---|---|---|---|---|---|---|
| AQR CAPITAL MANAGEMENT LLC CIK 0001167557 | Hedge Fund | 2.13M | $266.5M | 44.1% | 0.1% | Added | +$264.9M | Q2 2026 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. CIK 0001165408 | Hedge Fund | 535K | $67.6M | 11.2% | 0.1% | Reduced | $-6.9M | Q2 2026 |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC CIK 0001556921 | Hedge Fund | 413K | $52.1M | 8.6% | 0.2% | Added | — | Q2 2026 |
| Rockefeller Capital Management L.P. CIK 0001739439 | Hedge Fund | 392K | $49.5M | 8.2% | 0.1% | Added | $-124.4M | Q2 2026 |
| CITADEL ADVISORS LLC CIK 0001423053 | Hedge Fund | 343K | $43.3M | 7.2% | 0.0% | Reduced | +$18.5M | Q2 2026 |
| MILLENNIUM MANAGEMENT LLC CIK 0001273087 | Hedge Fund | 157K | $19.8M | 3.3% | 0.0% | Reduced | $-27.5M | Q2 2026 |
| Point72 Asset Management, L.P. CIK 0001603466 | Hedge Fund | 123K | $15.6M | 2.6% | 0.0% | Reduced | $-32.1M | Q2 2026 |
| TCW GROUP INC CIK 0000850401 | Hedge Fund | 121K | $15.3M | 2.5% | 0.1% | Reduced | +$15.2M | Q2 2026 |
| SHAW D E & CO INC CIK 0001009207 | Hedge Fund | 110K | $13.9M | 2.3% | 0.0% | Added | +$9.0M | Q2 2026 |
| TUDOR INVESTMENT CORP ET AL CIK 0000923093 | Hedge Fund | 75K | $9.5M | 1.6% | 0.0% | Added | +$6.6M | Q2 2026 |
Added
Hedge Fund
$266.5M· 44.1% of total· 0.1% port· 2.13M sh· +$264.9M QoQ· Q2 2026
Reduced
Hedge Fund
$67.6M· 11.2% of total· 0.1% port· 535K sh· $-6.9M QoQ· Q2 2026
Added
Hedge Fund
$52.1M· 8.6% of total· 0.2% port· 413K sh· — QoQ· Q2 2026
Added
Hedge Fund
$49.5M· 8.2% of total· 0.1% port· 392K sh· $-124.4M QoQ· Q2 2026
Reduced
Hedge Fund
$43.3M· 7.2% of total· 0.0% port· 343K sh· +$18.5M QoQ· Q2 2026
Reduced
Hedge Fund
$19.8M· 3.3% of total· 0.0% port· 157K sh· $-27.5M QoQ· Q2 2026
Reduced
Hedge Fund
$15.6M· 2.6% of total· 0.0% port· 123K sh· $-32.1M QoQ· Q2 2026
Reduced
Hedge Fund
$15.3M· 2.5% of total· 0.1% port· 121K sh· +$15.2M QoQ· Q2 2026
Added
Hedge Fund
$13.9M· 2.3% of total· 0.0% port· 110K sh· +$9.0M QoQ· Q2 2026
Added
Hedge Fund
$9.5M· 1.6% of total· 0.0% port· 75K sh· +$6.6M QoQ· Q2 2026
Reduced
Hedge Fund
$8.3M· 1.4% of total· 0.0% port· 66K sh· $-14.3M QoQ· Q2 2026
Added
Hedge Fund
$8.2M· 1.4% of total· 0.0% port· 65K sh· +$884K QoQ· Q2 2026
Reduced
Hedge Fund
$7.9M· 1.3% of total· 0.0% port· 63K sh· $-7.2M QoQ· Q2 2026
Reduced
Hedge Fund
$7.4M· 1.2% of total· 0.1% port· 72K sh· $-4.7M QoQ· Q3 2025
Added
Hedge Fund
$6.5M· 1.1% of total· 0.0% port· 51K sh· +$1.4M QoQ· Q2 2026
Reduced
Hedge Fund
$5.0M· 0.8% of total· 0.0% port· 39K sh· $-26.5M QoQ· Q2 2026
Reduced
Hedge Fund
$2.5M· 0.4% of total· 0.0% port· 20K sh· $-142K QoQ· Q2 2026
Reduced
Hedge Fund
$1.8M· 0.3% of total· 0.0% port· 14K sh· $-5.9M QoQ· Q2 2026
Added
Hedge Fund
$973K· 0.2% of total· 0.0% port· 8K sh· +$669K QoQ· Q2 2026
Reduced
Hedge Fund
$852K· 0.1% of total· 0.0% port· 7K sh· $-15.4M QoQ· Q2 2026
Reduced
Hedge Fund
$665K· 0.1% of total· 0.0% port· 5K sh· $-23.1M QoQ· Q2 2026
Added
Institutional Manager
$498K· 0.1% of total· 0.0% port· 4K sh· +$59K QoQ· Q2 2026
Reduced
Hedge Fund
$273K· 0.0% of total· 0.0% port· 2K sh· $-141K QoQ· Q2 2026
Added
Hedge Fund
$218K· 0.0% of total· 0.0% port· 2K sh· — QoQ· Q2 2026
Added
Hedge Fund
$3K· 0.0% of total· 0.0% port· 20 sh· — QoQ· Q2 2026
1–10 of 25
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Recent insider activity
Form 4 purchases and sales · 24 Jul 2026 – 21 Oct 20260 buyers · $03 sellers · $11.7M10 transactions
| Insider ⇅ | Trades ⇅ | Bought ⇅ | Sold ⇅ | Largest ⇅ | Latest ▼ | |
|---|---|---|---|---|---|---|
| McIntosh Greg W EVP, Chief Commercial Officer | 3 0 buy · 3 sell | — | $2.1M | $869K | 1 Oct 2026SEC ↗ | |
| Meaney William L President and CEO | 6 0 buy · 6 sell | — | $8.9M | $2.3M | 1 Oct 2026SEC ↗ | |
| Kidd Mark EVP, GM Data Centers & ALM | 1 0 buy · 1 sell | — | $736K | $736K | 7 Aug 2026SEC ↗ |
Distinct buyers and sellers may overlap. “Largest” is the largest reported transaction value in this window. Expand a row to see up to five recent filings.