Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
1,763 institutional managers reported holding WMB for the quarter ended Mar 31, 2026. Together they hold about 84% of shares outstanding; the top 10 hold 42%. 227 opened new positions; 136 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 135.85M | 11.08% | $9.89B | added +1.3% | ≤2013 |
| BlackRock | 111.87M | 9.13% | $8.14B | added +3.7% | ≤2013 |
| State Street | 72.99M | 5.95% | $5.31B | added +7.4% | ≤2013 |
| Bank OF America CORP /DE/ | 44.46M | 3.63% | $3.24B | trimmed -3.5% | ≤2013 |
| Morgan Stanley | 33.74M | 2.75% | $2.46B | added +0.5% | ≤2013 |
| Geode Capital | 29.59M | 2.41% | $2.15B | added +3.4% | ≤2013 |
| Clearbridge Investments, LLC | 23.24M | 1.90% | $1.69B | added +9% | ≤2013 |
| Wellington Management | 23.08M | 1.88% | $1.68B | trimmed -37.8% | 2018 Q3 |
| Deutsche Bank AG\ | 18.97M | 1.55% | $1.38B | trimmed -5.3% | 2013 Q3 |
| Invesco | 18.08M | 1.48% | $1.32B | added +22.8% | ≤2013 |
| UBS | 17.97M | 1.47% | $1.31B | trimmed -1.8% | ≤2013 |
| Blackstone | 17.07M | 1.39% | $1.24B | trimmed -3.2% | 2020 Q2 |
| T. Rowe Price | 15.93M | 1.30% | $1.16B | trimmed -7.1% | ≤2013 |
| Northern Trust | 13.42M | 1.09% | $976.9M | trimmed -0.7% | ≤2013 |
| Royal Bank OF Canada | 12.13M | 0.99% | $882.6M | trimmed -9.7% | ≤2013 |
| Amundi | 11.71M | 0.95% | $852.2M | added +20.9% | 2017 Q4 |
| Neuberger Berman Group LLC | 11.51M | 0.94% | $837.7M | trimmed -2.4% | ≤2013 |
| Tortoise Capital Advisors, L.l.c. | 11.50M | 0.94% | $836.8M | added +1.2% | ≤2013 |
| Goldman Sachs | 10.70M | 0.87% | $778.6M | added +2.8% | ≤2013 |
| Legal & General Group PLC | 9.23M | 0.75% | $671.5M | trimmed -7.5% | ≤2013 |
| Raymond James Financial INC | 9.11M | 0.74% | $663.2M | unchanged | ≤2013 |
| Dimensional Fund Advisors | 8.56M | 0.70% | $622.6M | trimmed -10.3% | ≤2013 |
| BNY Mellon | 8.05M | 0.66% | $585.7M | unchanged | ≤2013 |
| Charles Schwab Investment Management | 7.62M | 0.62% | $554.2M | added +2.4% | ≤2013 |
| Nuveen | 7.04M | 0.57% | $512.2M | added +10.9% | ≤2013 |
| Bahl & Gaynor INC | 6.86M | 0.56% | $499.2M | trimmed -1.9% | 2017 Q3 |
| Kayne Anderson Capital Advisors LP (focused) | 6.70M | 0.55% | $487.8M | trimmed -12.4% | ≤2013 |
| Cohen & Steers | 6.58M | 0.54% | $478.7M | added +2.3% | ≤2013 |
| American Century Companies INC | 6.46M | 0.53% | $469.8M | trimmed -5.5% | 2020 Q1 |
| Wells Fargo & COMPANY/MN | 6.36M | 0.52% | $462.5M | added +4.5% | ≤2013 |
| Ameriprise Financial INC | 5.97M | 0.49% | $434.7M | trimmed -28.9% | ≤2013 |
| Brookfield CORP /ON/ | 5.19M | 0.42% | $377.5M | trimmed -14.5% | ≤2013 |
| Westwood Holdings Group INC | 4.70M | 0.38% | $342.1M | added +10.5% | 2021 Q3 |
| Artisan Partners | 4.62M | 0.38% | $336.3M | trimmed -9.5% | 2024 Q4 |
| Victory Capital Management INC | 4.58M | 0.37% | $333.3M | added +3% | 2014 Q4 |
| Envestnet Asset Management INC | 4.57M | 0.37% | $332.6M | added +3.7% | ≤2013 |
| Mirae Asset Global Etfs Holdings LTD. | 4.56M | 0.37% | $332.1M | added +1% | 2017 Q4 |
| FMR (Fidelity) | 4.49M | 0.37% | $326.6M | added +8.6% | ≤2013 |
| Mackenzie Financial CORP | 4.33M | 0.35% | $314.9M | unchanged | 2015 Q1 |
| Pictet Asset Management Holding SA | 4.07M | 0.33% | $295.9M | trimmed -0.8% | ≤2013 |
| Qube Research & Technologies LTD | 3.85M | 0.31% | $279.8M | opened | 2020 Q3 |
| Stifel Financial CORP | 3.77M | 0.31% | $274.5M | added +2.2% | ≤2013 |
| Mitsubishi UFJ Asset Management CO., LTD. | 3.71M | 0.30% | $270.1M | added +5.4% | ≤2013 |
| Barclays PLC | 3.69M | 0.30% | $268.7M | added +33.1% | ≤2013 |
| Swiss National Bank | 3.58M | 0.29% | $260.8M | added +7.1% | ≤2013 |
| National Pension Service | 3.22M | 0.26% | $234.1M | added +2% | 2014 Q3 |
| 1832 Asset Management L.p. | 3.19M | 0.26% | $232.2M | trimmed -7.5% | 2021 Q3 |
| Chickasaw Capital Management LLC | 3.01M | 0.24% | $218.7M | trimmed -1.5% | ≤2013 |
| AllianceBernstein | 3.00M | 0.24% | $218.3M | trimmed -5.8% | ≤2013 |
| Bank OF Montreal /CAN/ | 2.91M | 0.24% | $212.1M | added +5% | ≤2013 |
Largest 50 of 1,763 shown; the full ranked, searchable register is at boothcheck.com/holders/WMB. 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.