| Vessel Name | Vessel Type | Owner Company | Shipyard | Date of Built |
| Siem Challenger | Anchor Tug/Supply, 16,300 HP | Siem Offshore | Havyard Leirvik | 2009 - 06 |
| Siem Marataizes | Oilfield Pollution Control, 56 m.loa | Siem Offshore | ETP Brazil | 2016 - 03 |
| Siem Maragogi | Oilfield Pollution Control, 56 m.loa | Siem Offshore | ETP Brazil | 2015 - 04 |
| Siem Ruby | Anchor Tug/Supply, 26,670 HP | Siem Offshore | Karmsund M'time | 2010 - 07 |
| Siem Pearl | Anchor Tug/Supply, 26,670 HP | Siem Offshore | Kleven Verft | 2009 - 09 |
| Siem Sapphire | Supply, 26,670 HP | Siem Offshore | Myklebust Verft | 2010 - 03 |
| Siem Emerald | Anchor Tug/Supply, 26,670 HP | Siem Offshore | Kleven Verft | 2009 - 12 |
| Siem Topaz | Anchor Tug/Supply, 26,670 HP | Siem Offshore | Myklebust Verft | 2010 - 07 |
| Siem Aquamarine | Supply, 26,670 HP | Siem Offshore | Kleven Verft | 2010 - 05 |
| Siem Opal | Anchor Tug/Supply, 26,670 HP | Siem Offshore | Kleven Verft | 2011 - 01 |
| Siem Amethyst | Anchor Tug/Supply, 26,670 HP | Siem Offshore | Kleven Verft | 2011 - 04 |
| Avalon Sea | Anchor Tug/Supply, 7,831 HP | Siem Offshore | Remontowa Shipbuilding | 2016 - 05 |
| JOIDES Resolution | Geophysical Survey, 143 m.loa | Siem Offshore | Hawker Siddeley | 1978 - 02 |
| Siem Helix 2 | Multi-Purpose Support, 158 LOA | Siem Offshore | Flensburger Shipbuilding | 2016 - 12 |
| Siem Helix 1 | Multi-Purpose Support, 158 LOA | Siem Offshore | Flensburger Shipbuilding | 2016 - 06 |
| Siem Barracuda | Multi-Purpose Support, 120 LOA | Siem Offshore | VARD Brattvaag | 2013 - 12 |
| Siem Day | Multi-Purpose Support, 95 LOA | Siem Offshore | Kleven Verft | 2010 - 02 |
| Siem Stingray | Multi-Purpose Support, 120 LOA | Siem Offshore | VARD Brattvaag | 2014 - 07 |
| Siem Spearfish | Multi-Purpose Support, 120 LOA | Siem Offshore | VARD Brattvaag | 2014 - 06 |
| Siem Dorado | Multi-Purpose Support, 93 LOA | Siem Offshore | Kleven Verft | 2009 - 06 |
| Siem Thiima | Platform Supply Vessel, 5,500 DWT | Siem Offshore | Remontowa Shipbuilding | 2016 - 11 |
| Siem Symphony | Platform Supply Vessel, 5,500 DWT | Siem Offshore | Hellesoy Verft | 2014 - 11 |
| Siem Pride | Platform Supply Vessel, 5,071 DWT | Siem Offshore | Remontowa Shipbuilding | 2015 - 11 |
| Siem Pilot | Platform Supply Vessel, 4,800 DWT | Siem Offshore | Eidsvik Skipsbyggeri | 2010 - 03 |
| Siem Atlas | Platform Supply Vessel, 4,700 DWT | Siem Offshore | VARD Niteroi | 2013 - 05 |
| Siem Giant | Platform Supply Vessel, 4,700 DWT | Siem Offshore | VARD Niteroi | 2014 - 05 |
| Far Stream | Anchor Tug/Supply, 14,684 HP | Alphard Group | Simek A/S | 2006 - 07 |
| Safeen 3000 | Pipe Laying, 60 inch | Safeen Feeders | Sembcorp TKY | 2008 - 02 |
| Sari Andalas V | Tug, 4,000 HP | PT ABB | PTUSP | 2011 - 10 |
| Heibuya | Dredger, 479 GT | PT ABB | Matsuura Tekko | 1986 - 10 |
| Tan Cang 28 | Tug, 3,201 HP | Asia Pacific Shipping | Pacific Ocean Engineering | 2009 - 01 |
| VB Vigor | Tug, 5,501 HP | Boluda Corporacion Maritima | Union Naval | 2004 - 11 |
| Bremen Hunter | Supply, 9,800 HP | Boluda Corporacion Maritima | Tronderverftet | 1982 - 05 |
| Bremen Fighter | Anchor Handling Tug, 7,900 HP | Boluda Corporacion Maritima | Mutzelfeldt | 2004 - 12 |
| VB Gladiador | Anchor Handling Tug, 5,300 HP | Boluda Corporacion Maritima | Schpsw. De Waal | 1987 - 05 |
| VB Hispania | Anchor Handling Tug, 8,160 HP | Boluda Corporacion Maritima | Daewoo-Mangalia | 2011 - 11 |
| J. Porres | Tug, 4,130 HP | Boluda Corporacion Maritima | Ast. Zamakona | 1998 - 11 |
| CMM Cordoba | Tug, 5,445 HP | Boluda Corporacion Maritima | Union Naval | 2003 - 04 |
| VB Kodiak | Tug, 5,167 HP | Boluda Corporacion Maritima | Dearsan Shipyard | 2007 - 06 |
| Union Grizzly | Tug, 5,290 HP | Boluda Corporacion Maritima | Dearsan Shipyard | 2007 - 08 |
| VB Xaloc | Tug, 7,608 HP | Boluda Corporacion Maritima | Ast. Zamakona | 2016 - 09 |
| VB Ceballos | Tug, 7,608 HP | Boluda Corporacion Maritima | Ast. Zamakona | 2018 - 01 |
| VB Talisman | Tug, 5,170 HP | Boluda Corporacion Maritima | San Vitale Yard | 2000 - 12 |
| Sirocco II | Tug, 3,920 HP | Boluda Corporacion Maritima | Ziegler Freres | 1975 - 12 |
| Jason | Supply, 11,154 HP | Boluda Corporacion Maritima | Keppel Singmarine | 2005 - 09 |
| Alesund | Patrol, 63 m.loa | Al Seer Marine Supplies & Equipment Co PJSC | Myklebust Verft | 1996 - 04 |
| Fugro Aquarius | ROV/Submersible Support, 83 LOA | Fugro N.V. | Wilson Sons Shipyard | 2015 - 08 |
| Fugro Mariner | Multi-Purpose Support, 76 LOA | Fugro N.V. | Yuexin Engineeringineering | 2006 - 05 |
| Atlantis Dweller | Multi-Purpose Support, 70 LOA | Fugro N.V. | Westcon | 2009 - 11 |
| Fugro Brasilis | Geophysical Survey, 65 m.loa | Fugro N.V. | Oakwell Shipbuilding | 2013 - 07 |