Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
237 institutional managers reported holding WS for the quarter ended Mar 31, 2026. Together they hold about 55% of shares outstanding; the top 10 hold 36%. 30 opened new positions; 31 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 5.10M | 10.03% | $155.2M | trimmed -6.4% | 2023 Q4 |
| Vanguard Group | 4.18M | 8.21% | $127.0M | trimmed -2.6% | 2023 Q4 |
| Dimensional Fund Advisors | 2.52M | 4.95% | $76.6M | added +2.8% | 2023 Q4 |
| State Street | 2.26M | 4.45% | $68.8M | added +22.2% | 2023 Q4 |
| AllianceBernstein | 956.2k | 1.88% | $29.1M | trimmed -5.8% | 2023 Q4 |
| Geode Capital | 837.9k | 1.65% | $25.5M | added +8.1% | 2023 Q4 |
| Charles Schwab Investment Management | 739.1k | 1.45% | $22.5M | trimmed -9% | 2023 Q4 |
| Teacher Retirement System OF Texas | 564.8k | 1.11% | $17.2M | added +6.6% | 2023 Q4 |
| T. Rowe Price Investment Management, INC. | 528.3k | 1.04% | $16.1M | opened | 2026 Q1 |
| Morgan Stanley | 488.7k | 0.96% | $14.9M | added +21.4% | 2023 Q4 |
| American Century Companies INC | 417.7k | 0.82% | $12.7M | trimmed -14.1% | 2023 Q4 |
| LSV Asset Management | 413.6k | 0.81% | $12.6M | added +13.1% | 2025 Q3 |
| Bridgeway Capital Management, LLC | 383.4k | 0.75% | $11.7M | added +7% | 2025 Q1 |
| Invesco | 377.5k | 0.74% | $11.5M | added +81.8% | 2023 Q4 |
| Northern Trust | 363.2k | 0.71% | $11.0M | added +3.2% | 2023 Q4 |
| FIL LTD | 360.5k | 0.71% | $11.0M | added +52.2% | 2023 Q4 |
| Goldman Sachs | 355.0k | 0.70% | $10.8M | added +81.3% | 2023 Q4 |
| BNY Mellon | 341.4k | 0.67% | $10.4M | trimmed -1.6% | 2023 Q4 |
| Nuveen | 289.4k | 0.57% | $8.8M | unchanged | 2023 Q4 |
| Windsor Advisory Group, LLC | 275.9k | 0.54% | $8.4M | added +32.9% | 2025 Q3 |
| Fisher Investments | 255.9k | 0.50% | $7.8M | added +7.4% | 2023 Q4 |
| Empowered Funds, LLC | 240.9k | 0.47% | $7.3M | added +13.6% | 2025 Q1 |
| CSM Advisors, LLC | 232.1k | 0.46% | $7.1M | added +9.1% | 2025 Q2 |
| Keybank National ASSOCIATION/OH | 206.9k | 0.41% | $6.3M | unchanged | 2025 Q4 |
| Principal Financial Group INC | 201.4k | 0.40% | $6.1M | added +29.9% | 2023 Q4 |
| Denali Advisors LLC | 199.4k | 0.39% | $6.1M | added +194.6% | 2025 Q4 |
| Renaissance Technologies | 186.4k | 0.37% | $5.7M | added +23.6% | 2024 Q1 |
| FMR (Fidelity) | 171.0k | 0.34% | $5.2M | added +213.6% | 2023 Q4 |
| Prudential Financial INC | 170.1k | 0.33% | $5.2M | added +13.7% | 2023 Q4 |
| UBS | 167.0k | 0.33% | $5.1M | added +41.6% | 2023 Q4 |
| Deprince Race & Zollo INC | 162.2k | 0.32% | $4.9M | trimmed -5.5% | 2025 Q1 |
| Lido Advisors, LLC | 162.0k | 0.32% | $4.9M | trimmed -3.6% | 2024 Q4 |
| Allspring Global Investments Holdings, LLC | 145.2k | 0.28% | $4.4M | trimmed -28.1% | 2023 Q4 |
| De Lisle Partners LLP | 129.2k | 0.25% | $3.9M | added +162.6% | 2024 Q1 |
| Russell Investments Group, LTD. | 119.4k | 0.23% | $3.6M | trimmed -18.9% | 2023 Q4 |
| Public Sector Pension Investment Board | 116.3k | 0.23% | $3.5M | added +3.1% | 2023 Q4 |
| Jane Street | 107.2k | 0.21% | $3.3M | added +112.9% | 2023 Q4 |
| Rhumbline Advisers | 102.2k | 0.20% | $3.1M | added +1.2% | 2023 Q4 |
| First Trust Advisors LP | 98.3k | 0.19% | $3.0M | trimmed -20.1% | 2024 Q4 |
| Bank OF America CORP /DE/ | 85.1k | 0.17% | $2.6M | added +1.8% | 2023 Q4 |
| SG Americas Securities, LLC | 79.8k | 0.16% | $2.4M | trimmed -15.6% | 2023 Q4 |
| Smithfield Trust CO | 76.1k | 0.15% | $2.3M | unchanged | 2023 Q4 |
| Legal & General Group PLC | 75.2k | 0.15% | $2.3M | trimmed -7.3% | 2023 Q4 |
| Midwest Trust CO | 73.9k | 0.14% | $2.2M | trimmed -2.7% | 2025 Q2 |
| Ameriprise Financial INC | 73.6k | 0.14% | $2.2M | trimmed -18.6% | 2023 Q4 |
| SEI Investments CO | 71.5k | 0.14% | $2.2M | added +127.8% | 2025 Q2 |
| Swiss National Bank | 65.2k | 0.13% | $2.0M | unchanged | 2023 Q4 |
| NEW York State Common Retirement Fund | 63.9k | 0.13% | $1.9M | added +115.3% | 2023 Q4 |
| Gw&k Investment Management, LLC | 62.5k | 0.12% | $1.9M | trimmed -4.2% | 2024 Q1 |
| Two Sigma | 61.3k | 0.12% | $1.9M | opened | 2026 Q1 |
Largest 50 of 237 shown; the full ranked, searchable register is at boothcheck.com/holders/WS. 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.