Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
666 institutional managers reported holding LECO for the quarter ended Mar 31, 2026. Together they hold about 81% of shares outstanding; the top 10 hold 42%. 78 opened new positions; 67 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 5.42M | 9.81% | $1.35B | added +2% | ≤2013 |
| BlackRock | 5.22M | 9.44% | $1.30B | added +3.9% | ≤2013 |
| Diamant Asset Management, INC. | 3.84M | 6.94% | $956.3M | added +24685.8% | 2017 Q4 |
| State Street | 2.23M | 4.03% | $555.2M | unchanged | ≤2013 |
| Victory Capital Management INC | 1.48M | 2.68% | $369.5M | trimmed -14.1% | 2017 Q1 |
| Geode Capital | 1.37M | 2.47% | $340.0M | added +4.5% | ≤2013 |
| Invesco | 1.17M | 2.11% | $291.2M | added +27.6% | ≤2013 |
| AQR Capital | 1.14M | 2.05% | $282.8M | added +18.1% | ≤2013 |
| Vaughan Nelson Investment Management, L.p. | 800.5k | 1.45% | $199.4M | added +72.1% | 2024 Q3 |
| Boston Partners | 799.9k | 1.45% | $199.2M | trimmed -4.2% | 2025 Q2 |
| Park Edge Advisors, LLC | 631.1k | 1.14% | $157.2M | trimmed -5.6% | 2022 Q4 |
| Keybank National ASSOCIATION/OH | 537.1k | 0.97% | $133.8M | trimmed -8.4% | ≤2013 |
| William Blair Investment Management, LLC | 534.9k | 0.97% | $133.2M | trimmed -12.3% | 2025 Q4 |
| Dimensional Fund Advisors | 497.6k | 0.90% | $123.9M | trimmed -8.3% | ≤2013 |
| Northern Trust | 459.7k | 0.83% | $114.5M | added +2.7% | ≤2013 |
| BNY Mellon | 446.0k | 0.81% | $111.1M | trimmed -3% | ≤2013 |
| Qube Research & Technologies LTD | 422.7k | 0.76% | $105.3M | added +33% | 2023 Q3 |
| Fisher Investments | 419.9k | 0.76% | $104.6M | trimmed -5% | ≤2013 |
| Thrivent Financial for Lutherans | 409.9k | 0.74% | $102.1M | added +9.8% | ≤2013 |
| Stifel Financial CORP | 409.9k | 0.74% | $102.1M | unchanged | ≤2013 |
| Mirae Asset Global Etfs Holdings LTD. | 404.5k | 0.73% | $100.7M | added +5.2% | 2018 Q1 |
| Nomura Asset Management International INC. | 397.1k | 0.72% | $98.9M | trimmed -19.4% | 2025 Q4 |
| UBS | 388.1k | 0.70% | $96.7M | trimmed -0.7% | ≤2013 |
| Charles Schwab Investment Management | 381.0k | 0.69% | $94.9M | added +3.2% | ≤2013 |
| Morgan Stanley | 374.3k | 0.68% | $93.2M | added +7.1% | ≤2013 |
| Westfield Capital Management CO LP | 358.2k | 0.65% | $89.2M | added +6.1% | 2018 Q3 |
| Goldman Sachs | 351.3k | 0.64% | $87.5M | added +24.9% | ≤2013 |
| FIL LTD | 325.1k | 0.59% | $81.0M | added +3421.9% | 2025 Q3 |
| Fiera Capital CORP | 310.3k | 0.56% | $77.3M | added +2% | 2023 Q3 |
| Principal Financial Group INC | 308.5k | 0.56% | $76.8M | trimmed -8.9% | ≤2013 |
| Boston Trust Walden CORP | 305.9k | 0.55% | $76.2M | added +0.7% | ≤2013 |
| First Trust Advisors LP | 288.5k | 0.52% | $71.8M | trimmed -22.6% | ≤2013 |
| Cartenna Capital, LP (focused) | 270.0k | 0.49% | $67.2M | trimmed -14.3% | 2025 Q2 |
| Saturna Capital CORP | 269.0k | 0.49% | $67.0M | unchanged | ≤2013 |
| American Century Companies INC | 267.7k | 0.48% | $66.7M | trimmed -20.8% | 2019 Q4 |
| MFS Investment Management | 256.1k | 0.46% | $63.8M | opened | 2026 Q1 |
| Lord, Abbett & CO. LLC | 236.9k | 0.43% | $59.0M | added +31% | 2025 Q2 |
| Gw&k Investment Management, LLC | 236.2k | 0.43% | $58.8M | added +13.7% | 2016 Q3 |
| Quantinno Capital Management LP | 228.2k | 0.41% | $56.8M | trimmed -4.1% | 2022 Q3 |
| Champlain Investment Partners, LLC | 218.4k | 0.40% | $54.4M | trimmed -44.5% | 2024 Q4 |
| Vaughan David Investments LLC/IL | 218.1k | 0.39% | $54.3M | trimmed -1% | 2022 Q1 |
| Teacher Retirement System OF Texas | 216.5k | 0.39% | $53.9M | added +1280.2% | 2020 Q3 |
| Welch & Forbes LLC | 209.9k | 0.38% | $52.3M | trimmed -1.3% | ≤2013 |
| Alyeska Investment Group | 209.4k | 0.38% | $52.2M | unchanged | 2025 Q1 |
| Natixis Advisors, LLC | 208.1k | 0.38% | $51.8M | added +134.2% | 2022 Q4 |
| Raymond James Financial INC | 201.4k | 0.36% | $50.2M | added +32.5% | 2014 Q1 |
| Birch Hill Investment Advisors LLC | 200.1k | 0.36% | $49.8M | unchanged | 2022 Q4 |
| Janus Henderson | 190.4k | 0.34% | $47.4M | trimmed -8.5% | 2015 Q3 |
| Bank OF America CORP /DE/ | 184.2k | 0.33% | $45.9M | trimmed -17.2% | ≤2013 |
| Point72 | 180.7k | 0.33% | $45.0M | added +3.8% | 2024 Q4 |
Largest 50 of 666 shown; the full ranked, searchable register is at boothcheck.com/holders/LECO. 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.