Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
1,040 institutional managers reported holding MLM for the quarter ended Mar 31, 2026. Together they hold about 94% of shares outstanding; the top 10 hold 48%. 91 opened new positions; 144 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 7.68M | 12.72% | $4.53B | added +4.1% | ≤2013 |
| BlackRock | 4.69M | 7.76% | $2.76B | added +4.4% | ≤2013 |
| State Street | 2.88M | 4.76% | $1.70B | added +3.8% | ≤2013 |
| FMR (Fidelity) | 2.61M | 4.32% | $1.54B | trimmed -10.7% | ≤2013 |
| Bank OF America CORP /DE/ | 2.40M | 3.97% | $1.41B | added +0.9% | ≤2013 |
| Principal Financial Group INC | 2.10M | 3.47% | $1.24B | trimmed -3.5% | ≤2013 |
| Aristotle Capital Management, LLC | 1.96M | 3.24% | $1.15B | trimmed -4.6% | 2014 Q1 |
| Victory Capital Management INC | 1.64M | 2.71% | $965.1M | trimmed -33.1% | 2015 Q3 |
| Geode Capital | 1.59M | 2.63% | $936.7M | added +2.3% | ≤2013 |
| T. Rowe Price | 1.49M | 2.46% | $877.7M | added +391.3% | ≤2013 |
| Morgan Stanley | 1.34M | 2.22% | $790.9M | trimmed -1.9% | ≤2013 |
| Baillie Gifford | 1.09M | 1.80% | $641.0M | trimmed -6.2% | ≤2013 |
| Select Equity Group | 1.03M | 1.71% | $609.2M | trimmed -3.2% | 2016 Q1 |
| T. Rowe Price Investment Management, INC. | 952.4k | 1.58% | $561.5M | added +59.2% | 2022 Q3 |
| Goldman Sachs | 885.9k | 1.47% | $522.2M | added +12.2% | ≤2013 |
| Alkeon Capital Management LLC | 747.4k | 1.24% | $440.6M | unchanged | 2016 Q4 |
| Gardner Russo & Quinn LLC | 715.4k | 1.18% | $421.7M | trimmed -1.5% | ≤2013 |
| UBS | 694.0k | 1.15% | $409.1M | added +30.5% | ≤2013 |
| Invesco | 690.9k | 1.14% | $407.3M | trimmed -10.3% | ≤2013 |
| King Luther Capital Management CORP | 666.7k | 1.10% | $393.0M | trimmed -3.4% | ≤2013 |
| Northern Trust | 586.5k | 0.97% | $345.8M | trimmed -2.2% | ≤2013 |
| Dimensional Fund Advisors | 546.2k | 0.90% | $322.0M | added +1.1% | ≤2013 |
| Franklin Resources | 528.2k | 0.88% | $311.4M | added +6% | ≤2013 |
| Cibc Bancorp USA INC. | 474.5k | 0.79% | $279.8M | trimmed -1.9% | 2016 Q4 |
| Mirae Asset Global Etfs Holdings LTD. | 461.7k | 0.76% | $272.2M | added +6.5% | 2018 Q3 |
| Charles Schwab Investment Management | 460.5k | 0.76% | $271.5M | added +2.6% | ≤2013 |
| BNY Mellon | 371.0k | 0.61% | $218.7M | unchanged | ≤2013 |
| Davenport & CO LLC | 342.2k | 0.57% | $201.7M | trimmed -1.8% | 2016 Q3 |
| D1 Capital Partners L.p. (focused) | 322.9k | 0.54% | $190.3M | opened | 2026 Q1 |
| Diamond Hill Capital Management INC | 289.1k | 0.48% | $170.5M | trimmed -35.2% | 2022 Q2 |
| William Blair Investment Management, LLC | 272.4k | 0.45% | $160.6M | added +0.8% | 2016 Q1 |
| Skye Global Management LP (focused) | 268.0k | 0.44% | $158.0M | trimmed -2.2% | 2023 Q1 |
| Wells Fargo & COMPANY/MN | 266.6k | 0.44% | $157.2M | added +10.4% | ≤2013 |
| Legal & General Group PLC | 266.5k | 0.44% | $157.1M | trimmed -1.8% | ≤2013 |
| Amundi | 264.1k | 0.44% | $155.7M | added +28.1% | 2017 Q4 |
| Mawer Investment Management LTD. | 255.7k | 0.42% | $150.7M | trimmed -3.5% | 2022 Q1 |
| Raymond James Financial INC | 238.7k | 0.40% | $140.7M | trimmed -26.7% | 2015 Q3 |
| Congress Asset Management CO | 238.0k | 0.39% | $140.3M | trimmed -0.7% | 2020 Q2 |
| Deutsche Bank AG\ | 235.4k | 0.39% | $138.8M | trimmed -13.1% | 2013 Q3 |
| Douglass Winthrop Advisors, LLC | 219.1k | 0.36% | $129.1M | trimmed -2% | ≤2013 |
| Great Lakes Advisors, LLC | 217.2k | 0.36% | $128.0M | added +18.6% | 2023 Q1 |
| Clearbridge Investments, LLC | 214.7k | 0.35% | $126.6M | trimmed -12.1% | 2014 Q1 |
| Mitsubishi UFJ Asset Management CO., LTD. | 211.5k | 0.35% | $124.7M | trimmed -1.3% | ≤2013 |
| Findlay Park Partners LLP | 194.3k | 0.32% | $114.5M | added +7.5% | ≤2013 |
| London CO OF Virginia | 189.6k | 0.31% | $111.8M | added +11.2% | ≤2013 |
| DekaBank Deutsche Girozentrale | 177.5k | 0.29% | $104.7M | unchanged | ≤2013 |
| Swiss National Bank | 177.0k | 0.29% | $104.4M | added +7.1% | ≤2013 |
| Envestnet Asset Management INC | 172.4k | 0.28% | $101.6M | added +8% | ≤2013 |
| Nuveen | 169.3k | 0.28% | $99.8M | added +14.8% | 2019 Q1 |
| BNP Paribas Financial Markets | 164.5k | 0.27% | $97.0M | added +16.1% | ≤2013 |
Largest 50 of 1,040 shown; the full ranked, searchable register is at boothcheck.com/holders/MLM. 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.