Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
124 institutional managers reported holding WPP for the quarter ended Mar 31, 2026. Together they hold about 2% of shares outstanding; the top 10 hold 2%. 23 opened new positions; 40 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Hotchkis & Wiley Capital Management LLC | 15.00M | 1.39% | $233.5M | added +48.6% | 2023 Q3 |
| Mondrian Investment Partners LTD | 3.40M | 0.32% | $53.0M | added +5.1% | 2017 Q4 |
| Brandes Investment Partners, LP | 898.7k | 0.08% | $14.0M | added +28% | 2017 Q3 |
| Dimensional Fund Advisors | 667.9k | 0.06% | $10.4M | trimmed -14.8% | ≤2013 |
| D. E. Shaw | 545.6k | 0.05% | $8.5M | added +154.9% | 2025 Q1 |
| Millennium Management | 460.4k | 0.04% | $7.2M | opened | 2024 Q3 |
| Connor, Clark & Lunn Investment Management LTD. | 427.3k | 0.04% | $6.7M | trimmed -30.2% | 2025 Q1 |
| Barclays PLC | 420.0k | 0.04% | $6.5M | opened | 2026 Q1 |
| Citadel Advisors | 283.4k | 0.03% | $4.4M | added +183.8% | 2024 Q4 |
| Point72 | 259.4k | 0.02% | $4.0M | opened | 2025 Q2 |
| Wells Fargo & COMPANY/MN | 187.5k | 0.02% | $2.9M | trimmed -7.6% | ≤2013 |
| Envestnet Asset Management INC | 158.1k | 0.01% | $2.5M | trimmed -1% | ≤2013 |
| Royal Bank OF Canada | 155.0k | 0.01% | $2.4M | trimmed -67.8% | ≤2013 |
| Bank OF America CORP /DE/ | 114.9k | 0.01% | $1.8M | trimmed -68.4% | ≤2013 |
| XTX Topco LTD | 110.4k | 0.01% | $1.7M | opened | 2025 Q2 |
| Jane Street | 110.2k | 0.01% | $1.7M | added +61.2% | 2018 Q2 |
| Renaissance Technologies | 104.1k | 0.01% | $1.6M | opened | 2024 Q2 |
| Northern Trust | 87.0k | <0.01% | $1.4M | trimmed -20.4% | ≤2013 |
| Ameriprise Financial INC | 79.1k | <0.01% | $1.2M | added +679.4% | ≤2013 |
| Aquatic Capital Management LLC | 75.1k | <0.01% | $1.2M | opened | 2026 Q1 |
| FMR (Fidelity) | 74.7k | <0.01% | $1.2M | trimmed -73.3% | 2017 Q4 |
| Range Financial Group LLC | 73.8k | <0.01% | $1.1M | opened | 2026 Q1 |
| Morgan Stanley | 71.2k | <0.01% | $1.1M | trimmed -83.2% | ≤2013 |
| Goldman Sachs | 66.9k | <0.01% | $1.0M | trimmed -81.7% | ≤2013 |
| UBS | 65.0k | <0.01% | $1.0M | added +83.3% | ≤2013 |
| Stifel Financial CORP | 61.1k | <0.01% | $951k | added +12% | 2021 Q3 |
| BlackRock | 60.6k | <0.01% | $943k | trimmed -89.6% | 2020 Q3 |
| Oppenheimer Asset Management INC. | 48.9k | <0.01% | $761k | added +38% | 2017 Q1 |
| SEI Investments CO | 48.5k | <0.01% | $755k | added +115.7% | 2022 Q4 |
| Hantz Financial Services, INC. | 48.3k | <0.01% | $752k | added +4.5% | 2024 Q2 |
| Balyasny Asset Management | 44.4k | <0.01% | $690k | trimmed -82.6% | 2025 Q2 |
| LPL Financial LLC | 44.2k | <0.01% | $688k | added +18.4% | 2016 Q1 |
| Mariner, LLC | 42.6k | <0.01% | $664k | trimmed -6.4% | 2021 Q1 |
| K.j. Harrison & Partners INC | 40.0k | <0.01% | $623k | trimmed -20% | 2025 Q4 |
| Arrowstreet Capital | 39.2k | <0.01% | $610k | opened | 2026 Q1 |
| Simplex Trading, LLC | 38.5k | <0.01% | $600k | added +937.1% | 2025 Q3 |
| Bank OF Montreal /CAN/ | 37.4k | <0.01% | $582k | trimmed -91.7% | ≤2013 |
| Barometer Capital Management INC. | 34.4k | <0.01% | $535k | opened | 2025 Q3 |
| Raymond James Financial INC | 30.7k | <0.01% | $478k | added +50.1% | 2014 Q2 |
| NewEdge Wealth, LLC | 26.6k | <0.01% | $415k | added +68.8% | 2022 Q2 |
| Vanguard Group | 23.0k | <0.01% | $359k | trimmed -8.9% | 2017 Q4 |
| Vestmark Advisory Solutions, INC. | 21.1k | <0.01% | $329k | added +73.4% | 2022 Q3 |
| Squarepoint Ops LLC | 20.1k | <0.01% | $312k | opened | 2025 Q1 |
| Pacific Capital Wealth Advisors, INC. | 20.0k | <0.01% | $311k | opened | 2026 Q1 |
| AXQ Capital, LP | 19.5k | <0.01% | $303k | opened | 2026 Q1 |
| Group ONE Trading LLC | 18.0k | <0.01% | $280k | opened | 2026 Q1 |
| Legacy Wealth Asset Management, LLC | 17.8k | <0.01% | $278k | added +81.6% | 2022 Q3 |
| Assetmark, INC | 17.3k | <0.01% | $270k | added +75% | 2024 Q1 |
| Quantinno Capital Management LP | 16.5k | <0.01% | $257k | trimmed -88.6% | 2022 Q4 |
| Brooklyn Investment Group | 16.5k | <0.01% | $257k | added +58.9% | 2024 Q4 |
Largest 50 of 124 shown; the full ranked, searchable register is at boothcheck.com/holders/WPP. 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.