The following table summarises the contracted providers for 2024/25:
| Ancillary Service Agent | MFK | Backup SFK | IR | OFR | BS |
|---|---|---|---|---|---|
| Contact Energy | ♦ Expires 2025 | ♦ Expires 2025 | ♦ Expires 2025 | ♦ Expires 2026 | ♦ Expires 2026 (SI) |
| Counties Power | ♦ Expires 2025 | ||||
| Enel X NZ (also includes Pan Pac and Winstone Pulp International) | ♦ Expires 2025 | ||||
| Genesis Energy | ♦ Expires 2025 | ♦ Expires 2025 | ♦ Expires 2025 | ♦ Expires 2025 (NI) | |
| King Country Energy | ♦ Expires 2025 | ||||
| Manawa Energy | ♦ Expires 2025 | ||||
| Mercury Energy | ♦ Expires 2025 | ♦ Expires 2025 | ♦ Expires 2025 | ♦ Expires 2026 | ♦ Expires 2025 (NI) |
| Meridian Energy | ♦ Expires 2025 | ♦ Expires 2025 | ♦ Expires 2025 | ♦ Expires 2026 | ♦ Expires 2026 (SI) |
| NewPower Energy | ♦ Expires 2025 | ||||
| Nga Awa Purua (Mercury) | ♦ Expires 2026 | ||||
| PowerNet | ♦ Expires 2025 | ||||
| SolarZero | ♦ Expires 2025 | ||||
| Tuaropaki (Mercury) | ♦ Expires 2026 | ||||
| Vector | ♦ Expires 2025 | ||||
| WEL Networks | ♦ Expires 2025 | ||||
| Wellington Electricity Lines | ♦ Expires 2025 |