| Assets and shares | ||||
|---|---|---|---|---|
| Asset | Percentage held | Start date | End date | |
| Northern States Power | 100.00 | - | - | |
| SOUTHWESTERN PUBLIC SERVICE COMPANY | - | - | ||
| Northern States Power Company | - | - | ||
| NORTHERN STATES POWER COMPANY | - | - | ||
| SOUTHWESTERN PUBLIC SERVICE COMPANY | 100.0 | - | ||
| Public Service Company of Colorado | - | - | ||
| Public Service Company of Colorado | 100.00 | - | - | |
| SOUTHWESTERN PUBLIC SERVICE COMPANY | 100.00 | - | - | |
| NORTHERN STATES POWER COMPANY | 100.0 | - | ||
| Public Service Company of Colorado | 100.0 | - | ||
| Northern States Power Company | 100.0 | - | ||