| No. | Ship Name | Ship Type | Shipyard | Date of Built |
| 1 | Joides Resolution | Drilling Ship | Hawker Siddeley, Halifax | 1978 - 02 |
| 2 | Remontowa B856/05 | Platform Supply Ship, 89.2 m.loa | Remontowa Shipbuilding, Gdansk | 2024 - 07 |
| 3 | Siem Sapphire | Anchor Handling Tug Supply, 4,250 tons | Khersonskiy Sudostroitelnyy Zavod, Kherson | 2010 - 03 |
| 4 | Siem Emerald | Anchor Handling Tug Supply, 4,163 tons | Kleven Verft, Ulsteinvik | 2009 - 12 |
| 5 | Siem Topaz | Anchor Handling Tug Supply, 4,250 tons | Khersonskiy Sudostroitelnyy Zavod, Kherson | 2010 - 07 |
| 6 | Siem Aquamarine | Anchor Handling Tug Supply, 4,250 tons | Crist Shipyard, Gdansk | 2010 - 05 |
| 7 | Avalon Sea | Anchor Handling Tug Supply, 3,700 tons | Remontowa Shipbuilding, Gdansk | 2016 - 05 |
| 8 | Siem Dorado | Platform Supply Ship, 93.6 m.loa | Kleven Verft, Ulsteinvik | 2009 - 06 |
| 9 | Siem Barracuda | Offshore Support Vessel, 5,000 tons | Vard Tulcea | 2013 - 12 |
| 10 | Siem Day | Offshore Support Vessel, 5,000 tons | Vard Tulcea | 2013 - 08 |
| 11 | Siem Stingray | Offshore Support Vessel, 5,253 tons | VARD Brattvaag | 2014 - 07 |
| 12 | Siem Spearfish | Offshore Support Vessel, 5,251 tons | Vard Tulcea | 2014 - 05 |
| 13 | Siem Helix 2 | Well Stimulation Vessel, 12,500 tons | Flensburger Shipbuilding | 2016 - 12 |
| 14 | Siem Helix 1 | Well Stimulation Vessel, 12,500 tons | Flensburger Shipbuilding | 2016 - 06 |
| 15 | Siem Marataizes | Platform Supply Ship, 56.8 m.loa | ETP Engenharia, Niteroi | 2016 - 03 |
| 16 | Siem Maragogi | Pollution Control Vessel, 57 m.loa | ETP Engenharia, Niteroi | 2015 - 04 |