Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
320 institutional managers reported holding WSC for the quarter ended Mar 31, 2026. Reported positions total over 95% of shares outstanding; the top 10 hold 60%. 46 opened new positions; 53 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| FMR (Fidelity) | 27.08M | 14.93% | $470.7M | added +9.4% | 2018 Q3 |
| BlackRock | 21.47M | 11.83% | $373.1M | added +0.8% | 2018 Q1 |
| Vanguard Group | 18.58M | 10.24% | $322.9M | added +4.6% | 2017 Q4 |
| Turtle Creek Asset Management INC. (focused) | 7.87M | 4.34% | $136.8M | added +27.3% | 2024 Q3 |
| T. Rowe Price Investment Management, INC. | 6.84M | 3.77% | $118.9M | added +357.8% | 2022 Q3 |
| Coliseum Capital Management, LLC (focused) | 6.22M | 3.43% | $108.1M | added +21.7% | 2024 Q2 |
| State Street | 5.87M | 3.23% | $102.0M | added +1.6% | 2018 Q1 |
| AllianceBernstein | 5.44M | 3.00% | $94.6M | added +3.1% | 2018 Q3 |
| Capital International Investors | 4.92M | 2.71% | $85.6M | trimmed -10.3% | 2024 Q2 |
| Samlyn Capital, LLC | 4.66M | 2.57% | $80.9M | added +97.5% | 2025 Q4 |
| Baillie Gifford | 4.49M | 2.48% | $78.1M | trimmed -4.7% | 2025 Q1 |
| PRIMECAP Management | 4.28M | 2.36% | $74.3M | unchanged | 2018 Q3 |
| Dimensional Fund Advisors | 4.11M | 2.27% | $71.4M | added +10.9% | 2018 Q4 |
| Clearbridge Investments, LLC | 4.04M | 2.23% | $70.3M | trimmed -10.7% | 2020 Q3 |
| Cooperman Leon G (focused) | 4.03M | 2.22% | $70.1M | unchanged | 2020 Q4 |
| Geode Capital | 3.35M | 1.85% | $58.2M | added +2.5% | 2018 Q1 |
| River Road Asset Management, LLC | 2.94M | 1.62% | $51.0M | added +2.7% | 2024 Q2 |
| Van Berkom & Associates INC. | 2.88M | 1.59% | $50.1M | trimmed -9.3% | 2024 Q4 |
| Barrow Hanley Mewhinney & Strauss LLC | 2.81M | 1.55% | $48.8M | trimmed -0.7% | 2020 Q3 |
| UBS | 2.73M | 1.51% | $47.5M | added +27.2% | 2017 Q4 |
| Royal London Asset Management LTD | 2.47M | 1.36% | $42.9M | opened | 2026 Q1 |
| Victory Capital Management INC | 2.21M | 1.22% | $38.4M | trimmed -2.5% | 2019 Q3 |
| Charles Schwab Investment Management | 2.12M | 1.17% | $36.9M | added +6% | 2018 Q1 |
| Morgan Stanley | 2.03M | 1.12% | $35.2M | trimmed -15.5% | 2017 Q4 |
| Douglas Lane & Associates, LLC | 1.71M | 0.94% | $29.7M | added +5.8% | 2024 Q3 |
| Cramer Rosenthal Mcglynn LLC | 1.71M | 0.94% | $29.7M | trimmed -5.8% | 2024 Q4 |
| Schroder Investment Management Group | 1.65M | 0.91% | $28.6M | added +51.1% | 2022 Q3 |
| Alyeska Investment Group | 1.56M | 0.86% | $27.1M | trimmed -13.9% | 2024 Q1 |
| Capital Group (American Funds) | 1.50M | 0.83% | $26.1M | unchanged | 2020 Q3 |
| William Blair Investment Management, LLC | 1.49M | 0.82% | $26.0M | trimmed -43.6% | 2020 Q4 |
| Brown Brothers Harriman & CO | 1.49M | 0.82% | $25.8M | trimmed -5.6% | 2020 Q3 |
| Northern Trust | 1.39M | 0.76% | $24.1M | added +2.1% | 2018 Q1 |
| Copeland Capital Management, LLC | 1.38M | 0.76% | $23.9M | unchanged | 2025 Q2 |
| Bank OF America CORP /DE/ | 1.37M | 0.76% | $23.8M | added +8.2% | 2018 Q2 |
| BNY Mellon | 1.37M | 0.75% | $23.7M | unchanged | 2018 Q1 |
| Broad Bay Capital Management, LP (focused) | 1.34M | 0.74% | $23.4M | added +2.8% | 2019 Q2 |
| Public Sector Pension Investment Board | 1.32M | 0.73% | $22.9M | added +17.8% | 2025 Q1 |
| Diversified Management INC | 1.20M | 0.66% | $20.9M | added +28% | 2025 Q4 |
| Silvercrest Asset Management Group LLC | 1.09M | 0.60% | $19.0M | added +2.9% | 2023 Q2 |
| Bislett Management, LLC (focused) | 1.00M | 0.55% | $17.5M | unchanged | 2020 Q3 |
| Adage Capital Partners GP, L.l.c. | 998.9k | 0.55% | $17.4M | trimmed -17.3% | 2025 Q3 |
| Citadel Advisors | 905.4k | 0.50% | $15.7M | trimmed -12.4% | 2017 Q4 |
| Chescapmanager LLC (focused) | 896.3k | 0.49% | $15.6M | unchanged | 2017 Q4 |
| Principal Financial Group INC | 882.0k | 0.49% | $15.3M | added +2.1% | 2020 Q2 |
| Goldman Sachs | 839.6k | 0.46% | $14.6M | added +264.7% | 2018 Q1 |
| Ameriprise Financial INC | 801.8k | 0.44% | $13.9M | trimmed -0.7% | 2020 Q3 |
| Riverbridge Partners LLC | 669.1k | 0.37% | $11.6M | trimmed -6.6% | 2020 Q3 |
| Bridgewater Associates | 659.0k | 0.36% | $11.5M | added +157% | 2024 Q2 |
| Balyasny Asset Management | 627.1k | 0.35% | $10.9M | added +45.7% | 2025 Q3 |
| Geneva Capital Management LLC | 618.6k | 0.34% | $10.8M | trimmed -6.7% | 2024 Q4 |
Largest 50 of 320 shown; the full ranked, searchable register is at boothcheck.com/holders/WSC. 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.