| Rank | Company | Operating income | Sector | Industry | Country | Exchange |
|---|---|---|---|---|---|---|
| 1 | $9.23B | Utilities | Utilities | United States | NYSE | |
| 2 | $8.56B | Utilities | Utilities | United States | NYSE | |
| 3 | $7.85B | Utilities | Utilities | United States | NYSE | |
| 4 | $7.30B | Utilities | Utilities | United States | NYSE | |
| 5 | $6.42B | Utilities | Utilities | United States | NYSE | |
| 6 | $6.38B | Utilities | Utilities | United States | NYSE | |
| 7 | $6.35B | Utilities | Utilities | United States | NYSE | |
| 8 | $6.11B | Utilities | Utilities | United States | NYSE | |
| 9 | $5.22B | Utilities | Utilities | United States | NYSE | |
| 10 | $5.17B | Utilities | Utilities | United States | NYSE | |
| 11 | $4.66B | Utilities | Utilities | United States | NYSE | |
| 12 | $4.51B | Utilities | Utilities | United States | NYSE | |
| 13 | $3.87B | Utilities | Utilities | United States | NYSE | |
| 14 | $3.84B | Utilities | Utilities | United States | NYSE | |
| 15 | $3.82B | Utilities | Utilities | United States | NYSE | |
| 16 | $3.56B | Utilities | Utilities | United States | NYSE | |
| 17 | $3.37B | Utilities | Utilities | United States | NYSE | |
| 18 | $3.18B | Utilities | Utilities | United States | NYSE | |
| 19 | $3.09B | Utilities | Utilities | United States | NYSE | |
| 20 | $3.02B | Utilities | Utilities | United States | NYSE | |
| 21 | $2.90B | Utilities | Utilities | United States | NYSE | |
| 22 | $2.32B | Utilities | Utilities | United States | NYSE | |
| 23 | $2.31B | Utilities | Utilities | United States | NYSE | |
| 24 | $2.27B | Utilities | Utilities | United States | NYSE | |
| 25 | $2.24B | Utilities | Utilities | United States | NYSE | |
| 26 | $2.19B | Utilities | Utilities | United States | NYSE | |
| 27 | $2.18B | Utilities | Utilities | United States | NYSE | |
| 28 | $2.02B | Utilities | Utilities | United States | NYSE | |
| 29 | $1.95B | Utilities | Utilities | United States | NYSE | |
| 30 | $1.86B | Utilities | Utilities | United States | NYSE | |
| 31 | $1.82B | Utilities | Utilities | United States | NYSE | |
| 32 | $1.74B | Utilities | Utilities | United States | NYSE | |
| 33 | $1.67B | Utilities | Utilities | United States | NYSE | |
| 34 | $1.66B | Utilities | Utilities | United States | NYSE | |
| 35 | $1.18B | Utilities | Utilities | United States | NYSE | |
| 36 | $1.14B | Utilities | Utilities | United States | NYSE | |
| 37 | $1.01B | Utilities | Utilities | United States | NYSE | |
| 38 | $901M | Utilities | Utilities | United States | NYSE | |
| 39 | $784M | Utilities | Utilities | United States | NYSE | |
| 40 | $739M | Utilities | Utilities | United States | NYSE | |
| 41 | $652M | Utilities | Utilities | United States | NYSE | |
| 42 | $650M | Utilities | Utilities | United States | NYSE | |
| 43 | $553M | Utilities | Utilities | United States | NYSE | |
| 44 | $549M | Utilities | Utilities | United States | NYSE | |
| 45 | $499M | Utilities | Utilities | United States | NYSE | |
| 46 | $497M | Utilities | Utilities | United States | NYSE | |
| 47 | $497M | Utilities | Utilities | United States | NYSE | |
| 48 | $477M | Utilities | Utilities | United States | NYSE | |
| 49 | $410M | Utilities | Utilities | United States | NYSE | |
| 50 | $382M | Utilities | Utilities | United States | NYSE | |
| 51 | $377M | Utilities | Utilities | United States | NYSE | |
| 52 | $360M | Utilities | Utilities | United States | NYSE | |
| 53 | $320M | Utilities | Utilities | United States | NYSE | |
| 54 | $311M | Utilities | Utilities | United States | NYSE | |
| 55 | $295M | Utilities | Utilities | United States | NYSE | |
| 56 | $271M | Utilities | Utilities | United States | NYSE | |
| 57 | $222M | Utilities | Utilities | United States | NYSE | |
| 58 | $211M | Utilities | Utilities | United States | NYSE | |
| 59 | $198M | Utilities | Utilities | United States | NYSE | |
| 60 | $197M | Utilities | Utilities | United States | NYSE | |
| 61 | $185M | Utilities | Utilities | United States | NYSE | |
| 62 | $143M | Utilities | Utilities | United States | NYSE | |
| 63 | $113M | Utilities | Utilities | United States | NYSE | |
| 64 | $92.8M | Utilities | Utilities | United States | NYSE | |
| 65 | $19.9M | Utilities | Utilities | United States | NYSE | |
| 66 | $3.05M | Utilities | Utilities | United States | NYSE |