Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
394 institutional managers reported holding LPX for the quarter ended Mar 31, 2026. Reported positions total over 95% of shares outstanding; the top 10 hold 52%. 51 opened new positions; 64 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 6.38M | 9.11% | $464.2M | added +3.5% | ≤2013 |
| BlackRock | 6.23M | 8.90% | $453.5M | added +5.9% | ≤2013 |
| Berkshire Hathaway (focused) | 5.66M | 8.09% | $412.2M | unchanged | 2022 Q3 |
| T. Rowe Price | 4.33M | 6.18% | $314.8M | added +151% | ≤2013 |
| 59 North Capital Management, LP (focused) | 3.26M | 4.66% | $237.5M | trimmed -7.7% | 2024 Q2 |
| FMR (Fidelity) | 2.69M | 3.85% | $195.9M | added +19.5% | 2017 Q4 |
| Eminence Capital (focused) | 2.53M | 3.62% | $184.3M | trimmed -37.4% | 2023 Q2 |
| State Street | 2.21M | 3.16% | $161.1M | added +2% | ≤2013 |
| Dimensional Fund Advisors | 1.64M | 2.34% | $119.3M | added +0.9% | ≤2013 |
| American Century Companies INC | 1.35M | 1.93% | $98.3M | added +1.3% | 2020 Q3 |
| Boston Partners | 1.32M | 1.88% | $95.8M | added +16.4% | 2025 Q3 |
| Fiduciary Management INC /WI/ | 1.27M | 1.81% | $92.1M | added +15.2% | 2025 Q2 |
| Geode Capital | 1.17M | 1.67% | $84.8M | unchanged | ≤2013 |
| Capital Group (American Funds) | 1.15M | 1.65% | $83.9M | opened | 2026 Q1 |
| Maple Rock Capital Partners INC. (focused) | 1.11M | 1.59% | $80.9M | added +88.9% | 2025 Q1 |
| Holocene Advisors | 1.03M | 1.47% | $74.7M | added +15% | 2025 Q3 |
| Citadel Advisors | 977.8k | 1.40% | $71.1M | added +17.9% | ≤2013 |
| Channing Capital Management, LLC | 959.0k | 1.37% | $69.8M | trimmed -2.6% | 2023 Q4 |
| Nomura Asset Management International INC. | 887.0k | 1.27% | $64.5M | trimmed -1.2% | 2025 Q4 |
| T. Rowe Price Investment Management, INC. | 788.4k | 1.13% | $57.4M | added +548.6% | 2024 Q2 |
| Deprince Race & Zollo INC | 778.0k | 1.11% | $56.6M | opened | 2026 Q1 |
| Charles Schwab Investment Management | 696.6k | 0.99% | $50.7M | added +3.4% | ≤2013 |
| Morgan Stanley | 660.6k | 0.94% | $48.1M | trimmed -31.5% | ≤2013 |
| Invesco | 655.2k | 0.94% | $47.7M | added +3.4% | ≤2013 |
| Victory Capital Management INC | 646.5k | 0.92% | $47.0M | trimmed -7.6% | 2018 Q1 |
| AQR Capital | 638.2k | 0.91% | $46.4M | trimmed -2.9% | ≤2013 |
| Avantyr Capital Partners, LP (focused) | 622.5k | 0.89% | $45.3M | opened | 2026 Q1 |
| William Blair Investment Management, LLC | 596.1k | 0.85% | $43.4M | trimmed -28.1% | 2024 Q2 |
| Northern Trust | 586.6k | 0.84% | $42.7M | trimmed -0.9% | ≤2013 |
| BNY Mellon | 571.7k | 0.82% | $41.6M | trimmed -30.4% | ≤2013 |
| Crow's Nest Holdings LP (focused) | 570.0k | 0.81% | $41.5M | trimmed -25% | 2024 Q3 |
| Mirae Asset Global Etfs Holdings LTD. | 536.6k | 0.77% | $39.0M | added +12.1% | 2021 Q1 |
| Thrivent Financial for Lutherans | 535.3k | 0.77% | $39.0M | added +38.9% | 2025 Q3 |
| Franklin Resources | 513.7k | 0.73% | $37.4M | added +1.8% | 2020 Q2 |
| Marshall Wace | 512.1k | 0.73% | $37.3M | added +301.4% | 2024 Q1 |
| Principal Financial Group INC | 497.9k | 0.71% | $36.2M | added +20.5% | ≤2013 |
| Woodline Partners LP | 493.8k | 0.70% | $35.9M | trimmed -13.1% | 2024 Q4 |
| UBS | 492.1k | 0.70% | $35.8M | trimmed -33.3% | ≤2013 |
| Southernsun Asset Management, LLC (focused) | 485.9k | 0.69% | $35.4M | added +6.3% | 2023 Q1 |
| Fernbridge Capital Management LP (focused) | 405.1k | 0.58% | $29.5M | trimmed -55% | 2025 Q2 |
| Point72 | 403.9k | 0.58% | $29.4M | added +950% | 2022 Q4 |
| Junto Capital Management LP | 377.6k | 0.54% | $27.5M | opened | 2026 Q1 |
| Pictet Asset Management Holding SA | 366.8k | 0.52% | $26.7M | trimmed -7.5% | 2017 Q1 |
| Verition Fund Management | 316.8k | 0.45% | $23.1M | added +1101.3% | 2020 Q3 |
| Capital Research Global Investors | 313.5k | 0.45% | $22.8M | trimmed -75.4% | 2025 Q2 |
| Goldman Sachs | 310.8k | 0.44% | $22.6M | added +5% | ≤2013 |
| Caisse de depot et placement du Quebec | 277.9k | 0.40% | $20.2M | trimmed -45.1% | 2024 Q4 |
| NEW York State Common Retirement Fund | 243.9k | 0.35% | $17.7M | unchanged | ≤2013 |
| Bank OF America CORP /DE/ | 233.2k | 0.33% | $17.0M | trimmed -1.6% | ≤2013 |
| First Eagle Investment Management | 231.9k | 0.33% | $16.9M | added +18.5% | 2022 Q4 |
Largest 50 of 394 shown; the full ranked, searchable register is at boothcheck.com/holders/LPX. 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.