| Class | Fleet or last known tactical grouping | Ship Name | Hull classification symbol | Last known captain | Notes |
|---|---|---|---|---|---|
| Epoch-class heavy carrier | Unknown | UNSC Epoch | Lead ship | ||
| UNSC Atlas | |||||
| Infinity-class supercarrier | Expeditionary Strike Group 1 | UNSC Infinity | INF-101 | Thomas Lasky | Lead ship. Missing over Installation 07. |
| Unknown | UNSC Eternity | Not Completed | |||
| Orion-class assault carrier | Unknown | UNSC Fifth Winter | |||
| UNSC Orion | Lead ship | ||||
| Phoenix-class carrier | Third Fleet | UNSC Spirit of Fire | CFV-88 | James Cutter | Active but officially listed as lost with all hands. |
| Poseidon-class light carrier | Unknown | UNSC Milwaukee | |||
| UNSC Poseidon | Lead ship | ||||
| Punic-class supercarrier | Unknown | UNSC Punic | Lead ship | ||
| Epsilon Eridani Fleet | UNSC Trafalgar | Flagship of Epsilon Eridani Fleet. Destroyed over Reach | |||
| Unknown | UNSC Home Fleet | UNSC Stalingrad | Carl Patterson | ||
| UNSC Witness | |||||
| Third Fleet | UNSC Totem Lake | CVA-92 | |||
| Unknown | UNSC All Under Heaven | ||||
| UNSC Magellan | |||||
| UNSC Musashi |
