Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
1,118 institutional managers reported holding WAB for the quarter ended Mar 31, 2026. Together they hold about 91% of shares outstanding; the top 10 hold 51%. 143 opened new positions; 122 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 19.95M | 11.69% | $4.99B | unchanged | ≤2013 |
| FMR (Fidelity) | 19.72M | 11.55% | $4.93B | added +4.3% | ≤2013 |
| BlackRock | 13.74M | 8.05% | $3.43B | added +2.3% | ≤2013 |
| T. Rowe Price | 8.00M | 4.69% | $2.00B | unchanged | ≤2013 |
| State Street | 7.74M | 4.54% | $1.93B | added +1.1% | ≤2013 |
| Geode Capital | 4.56M | 2.67% | $1.14B | added +4.4% | ≤2013 |
| Nordea Investment Management AB | 3.56M | 2.08% | $888.8M | added +15.9% | 2014 Q4 |
| FIL LTD | 3.50M | 2.05% | $875.3M | trimmed -4.2% | 2022 Q1 |
| Select Equity Group | 2.92M | 1.71% | $730.8M | trimmed -17.9% | 2021 Q2 |
| Wellington Management | 2.51M | 1.47% | $627.4M | trimmed -5.9% | 2017 Q4 |
| Morgan Stanley | 2.46M | 1.44% | $615.6M | added +19.1% | ≤2013 |
| UBS | 2.17M | 1.27% | $542.9M | trimmed -14.3% | ≤2013 |
| Invesco | 2.13M | 1.25% | $532.9M | trimmed -2.7% | ≤2013 |
| Boston Partners | 1.96M | 1.15% | $489.0M | trimmed -2.7% | 2021 Q2 |
| Dimensional Fund Advisors | 1.73M | 1.01% | $431.3M | trimmed -0.9% | ≤2013 |
| Northern Trust | 1.73M | 1.01% | $431.2M | trimmed -0.9% | ≤2013 |
| Beutel, Goodman & CO LTD. | 1.65M | 0.97% | $412.2M | trimmed -5.4% | 2020 Q2 |
| MFS Investment Management | 1.62M | 0.95% | $404.1M | trimmed -3.9% | 2021 Q1 |
| Farallon Capital | 1.61M | 0.94% | $402.3M | trimmed -35% | 2017 Q1 |
| AQR Capital | 1.34M | 0.79% | $336.0M | trimmed -2.5% | 2020 Q3 |
| American Century Companies INC | 1.23M | 0.72% | $306.3M | added +5.9% | ≤2013 |
| Goldman Sachs | 1.19M | 0.69% | $296.7M | added +28.3% | ≤2013 |
| Charles Schwab Investment Management | 1.12M | 0.66% | $279.8M | added +4.5% | ≤2013 |
| Amundi | 1.10M | 0.64% | $274.6M | trimmed -5.1% | 2017 Q4 |
| Kayne Anderson Rudnick Investment Management LLC | 1.06M | 0.62% | $264.2M | added +0.6% | 2023 Q2 |
| Nuveen | 1.03M | 0.60% | $257.4M | added +1.1% | 2019 Q1 |
| Royal London Asset Management LTD | 992.4k | 0.58% | $248.1M | trimmed -13% | 2018 Q2 |
| Legal & General Group PLC | 974.5k | 0.57% | $243.6M | trimmed -8.9% | 2013 Q4 |
| Aviva PLC | 851.9k | 0.50% | $212.9M | trimmed -12.3% | 2015 Q3 |
| Assenagon Asset Management S.a. | 851.7k | 0.50% | $212.9M | added +288% | 2021 Q3 |
| Deutsche Bank AG\ | 833.4k | 0.49% | $208.3M | trimmed -7.2% | 2013 Q3 |
| Bank OF Montreal /CAN/ | 821.2k | 0.48% | $205.3M | trimmed -7.2% | ≤2013 |
| BNY Mellon | 794.0k | 0.47% | $198.5M | trimmed -2.2% | ≤2013 |
| Raymond James Financial INC | 749.8k | 0.44% | $187.4M | trimmed -7.8% | ≤2013 |
| Bessemer Group INC | 717.4k | 0.42% | $179.3M | trimmed -34.7% | 2015 Q2 |
| Bank OF America CORP /DE/ | 667.7k | 0.39% | $166.9M | added +3.5% | ≤2013 |
| Alyeska Investment Group | 620.0k | 0.36% | $155.0M | trimmed -1.7% | 2023 Q2 |
| Santori & Peters, INC. | 602.3k | 0.35% | $150.6M | unchanged | 2017 Q4 |
| PointState Capital LP (focused) | 600.7k | 0.35% | $150.1M | added +7.6% | 2025 Q3 |
| PNC Financial Services Group, INC. | 564.5k | 0.33% | $141.1M | added +5.4% | ≤2013 |
| Robeco Institutional Asset Management B.v. | 563.9k | 0.33% | $141.0M | trimmed -8.7% | 2017 Q4 |
| BNP Paribas Financial Markets | 512.9k | 0.30% | $128.2M | added +9.7% | 2014 Q1 |
| Qube Research & Technologies LTD | 502.1k | 0.29% | $125.5M | added +31.6% | 2025 Q2 |
| Swiss National Bank | 501.7k | 0.29% | $125.4M | added +7.1% | ≤2013 |
| AustralianSuper Pty LTD | 495.0k | 0.29% | $123.7M | trimmed -45.5% | 2024 Q2 |
| Park Presidio Capital LLC (focused) | 492.7k | 0.29% | $123.2M | trimmed -15.1% | 2016 Q3 |
| Mitsubishi UFJ Asset Management CO., LTD. | 491.9k | 0.29% | $123.0M | trimmed -1.4% | 2014 Q4 |
| AllianceBernstein | 473.9k | 0.28% | $118.5M | added +9.4% | ≤2013 |
| Barclays PLC | 473.3k | 0.28% | $118.3M | added +70.4% | ≤2013 |
| Pinebridge Investments LLC | 411.2k | 0.24% | $102.8M | trimmed -9.3% | 2020 Q1 |
Largest 50 of 1,118 shown; the full ranked, searchable register is at boothcheck.com/holders/WAB. 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.