Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
1,058 institutional managers reported holding IRM for the quarter ended Mar 31, 2026. Together they hold about 84% of shares outstanding; the top 10 hold 49%. 168 opened new positions; 98 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 46.98M | 15.72% | $4.80B | added +0.7% | ≤2013 |
| BlackRock | 33.02M | 11.05% | $3.37B | unchanged | ≤2013 |
| State Street | 17.55M | 5.87% | $1.79B | added +3.9% | ≤2013 |
| Cohen & Steers | 16.17M | 5.41% | $1.65B | trimmed -14.5% | 2020 Q2 |
| Geode Capital | 8.49M | 2.84% | $867.3M | added +2.3% | ≤2013 |
| FMR (Fidelity) | 7.48M | 2.50% | $764.9M | trimmed -6.3% | ≤2013 |
| Morgan Stanley | 4.65M | 1.56% | $475.5M | added +29.3% | ≤2013 |
| Principal Financial Group INC | 4.58M | 1.53% | $468.0M | added +8.7% | ≤2013 |
| Dimensional Fund Advisors | 4.55M | 1.52% | $465.2M | added +2.8% | ≤2013 |
| Northern Trust | 4.15M | 1.39% | $424.2M | unchanged | ≤2013 |
| Charles Schwab Investment Management | 4.01M | 1.34% | $410.1M | added +3.4% | ≤2013 |
| Invesco | 3.92M | 1.31% | $400.8M | trimmed -11.2% | ≤2013 |
| Legal & General Group PLC | 3.14M | 1.05% | $320.4M | trimmed -6.6% | ≤2013 |
| Daiwa Securities Group INC. | 3.11M | 1.04% | $317.6M | trimmed -15% | ≤2013 |
| Deutsche Bank AG\ | 3.09M | 1.03% | $316.0M | added +21.6% | 2013 Q3 |
| Prudential Financial INC | 2.42M | 0.81% | $246.9M | added +4.6% | ≤2013 |
| Centersquare Investment Management LLC | 2.31M | 0.77% | $236.1M | trimmed -12.2% | 2023 Q1 |
| Goldman Sachs | 2.22M | 0.74% | $226.5M | added +45.4% | ≤2013 |
| Vontobel Holding LTD. | 2.12M | 0.71% | $216.3M | added +25.3% | 2024 Q3 |
| Nuveen | 2.07M | 0.69% | $211.4M | trimmed -2.8% | ≤2013 |
| Capital Group (American Funds) | 1.87M | 0.63% | $190.8M | trimmed -11.8% | ≤2013 |
| Ameriprise Financial INC | 1.85M | 0.62% | $189.2M | added +6.1% | ≤2013 |
| AQR Capital | 1.85M | 0.62% | $188.7M | added +100% | ≤2013 |
| BNY Mellon | 1.62M | 0.54% | $166.1M | trimmed -3.6% | ≤2013 |
| Duff & Phelps Investment Management CO | 1.58M | 0.53% | $161.0M | unchanged | 2023 Q3 |
| Russell Investments Group, LTD. | 1.46M | 0.49% | $148.7M | added +3.5% | 2016 Q4 |
| Contour Asset Management LLC (focused) | 1.44M | 0.48% | $147.7M | trimmed -49% | 2025 Q1 |
| Royal Bank OF Canada | 1.41M | 0.47% | $144.2M | added +9.7% | ≤2013 |
| Bank OF America CORP /DE/ | 1.40M | 0.47% | $143.0M | trimmed -7.3% | ≤2013 |
| Pggm Investments | 1.37M | 0.46% | $140.0M | trimmed -17.3% | 2023 Q1 |
| Hsbc Holdings PLC | 1.27M | 0.43% | $130.1M | added +20.6% | ≤2013 |
| Cbre Investment Management Listed Real Assets LLC | 1.24M | 0.41% | $126.5M | trimmed -14.4% | 2024 Q3 |
| DekaBank Deutsche Girozentrale | 1.12M | 0.38% | $114.7M | unchanged | 2017 Q2 |
| Amundi | 1.09M | 0.36% | $111.6M | trimmed -18.2% | 2014 Q2 |
| Mitsubishi UFJ Asset Management CO., LTD. | 1.03M | 0.34% | $104.8M | added +7.3% | ≤2013 |
| SEI Investments CO | 974.8k | 0.33% | $99.6M | trimmed -4.9% | ≤2013 |
| Sumitomo Mitsui Trust Group, INC. | 933.7k | 0.31% | $95.4M | added +3% | ≤2013 |
| Swiss National Bank | 867.5k | 0.29% | $88.7M | added +7.2% | ≤2013 |
| Pictet Asset Management Holding SA | 864.7k | 0.29% | $88.4M | trimmed -62.3% | ≤2013 |
| APG Asset Management N.v. | 854.8k | 0.29% | $87.4M | added +16.1% | 2019 Q3 |
| Cibc Bancorp USA INC. | 828.8k | 0.28% | $84.7M | added +4.5% | 2016 Q4 |
| American Century Companies INC | 815.8k | 0.27% | $83.4M | added +106.1% | 2020 Q3 |
| UBS | 812.2k | 0.27% | $83.0M | added +1.8% | ≤2013 |
| Jane Street | 707.4k | 0.24% | $72.3M | opened | 2026 Q1 |
| Barclays PLC | 673.8k | 0.23% | $68.9M | trimmed -7.6% | ≤2013 |
| Wells Fargo & COMPANY/MN | 658.5k | 0.22% | $67.3M | added +3.3% | ≤2013 |
| Welch & Forbes LLC | 652.1k | 0.22% | $66.6M | trimmed -0.7% | ≤2013 |
| BNP Paribas Financial Markets | 636.5k | 0.21% | $65.1M | trimmed -13.1% | ≤2013 |
| LPL Financial LLC | 621.2k | 0.21% | $63.5M | trimmed -2.1% | ≤2013 |
| Epoch Investment Partners, INC. | 616.5k | 0.21% | $63.0M | trimmed -2.1% | 2015 Q1 |
Largest 50 of 1,058 shown; the full ranked, searchable register is at boothcheck.com/holders/IRM. Related filers are grouped using the filings' own included-manager declarations. Historically, several managers opening new positions in the same quarter said almost nothing about the quarter that followed (59,118 cases since 2013). A filed record, not a forecast. Nothing here is investment advice.