| 41 North Offshore, LLC | LA; Gulf of Mexico | https://www.41northoffshore.com |
| Adriatic Marine LLC | Raceland, LA | https://www.adriaticmarinellc.com |
| All Coast LLC | Lafayette, LA | https://www.allcoastllc.com |
| Alpha Marine Services | Cut Off, LA | https://www.alphamarineservices.com |
| Alpine Ocean Seismic Survey | Norwood, NJ | https://www.alpineocean.com |
| American Offshore Services (AOS) | Providence, RI | https://a-o-s.com |
| Aqueos Corporation | Broussard, LA | https://aqueossubsea.com |
| Aries Marine Corporation | Lafayette, LA | https://www.ariesmarine.com |
| Atlantic Wind Transfers | North Kingstown, RI | https://www.atlanticwindtransfers.com |
| Barry Graham Oil Service | Bayou La Batre, AL | https://www.bgos.net |
| Bludworth Marine LLC | Houston, TX | https://www.vesselrepair.com |
| Bollinger Shipyards | Lockport, LA; multiple Gulf Coast yards | https://www.bollingershipyards.com |
| Bordelon Marine | Lockport, LA | https://www.bordelonmarine.com |
| Breaux's Bay Craft | Loreauville, LA | https://www.breauxsbaycraft.com |
| C & G Boats | Cut Off, LA | https://www.cgboats.com |
| C-Innovation | Mandeville, LA | https://www.c-innovation.com |
| Caldwell Marine International | Portland, ME | https://www.caldwellmarine.com |
| Candy Fleet Corporation | Morgan City, LA | https://www.candyfleet.com |
| Carver Marine Towing | New York, NY | https://www.carvercompanies.com |
| Central Boat Rentals, Inc. | Pierre Part, LA; Gulf of Mexico inshore/inland | https://www.centralboat.com |
| Champagne Energy & Environmental Solutions (CEES) | Houma, LA | https://cees.com |
| Chenega Corporation | Anchorage, AK; Alaska coastal, Prince William Sound | https://www.chenega.com |
| Cheramie Marine | Lafourche Parish, LA | https://www.cheramiemarine.com |
| Chet Morrison Contractors | Houma, LA | https://www.morrisonenergy.com |
| Coast Line Transfers | Fall River, MA | https://www.clt-marine.com |
| Coastal Crewboats | Aransas Pass, TX | https://www.coastalcrewboats.com |
| Conrad Industries | Morgan City, LA; multiple yards | https://www.conradindustries.com |
| Delta Marine Logistics | New Orleans, LA | https://deltamarinelogistics.com/ |
| Eastern Shipbuilding Group | Panama City, FL | https://www.easternshipbuilding.com |
| Edison Chouest Offshore | Galliano, LA; Gulf of Mexico & international | https://www.chouest.com |
| Elevating Boats LLC (EBI) | Houma, LA | https://www.ebi-inc.com |
| Fugro (US Operations) | Houston, TX | https://www.fugro.com |
| Grand Isle Shipyard (GIS) | Galliano, LA | https://www.gisy.com |
| Guice Offshore | Abbeville, LA | https://www.guiceoffshore.com |
| Gulf Copper & Manufacturing | Port Arthur / Galveston, TX | https://www.gulfcopper.com |
| Gulf Oceanic Marine Contractors, Inc. | LA; Gulf of Mexico | https://www.gulfoceanicmarine.com |
| Harvey Gulf International Marine | New Orleans, LA; Gulf of Mexico | https://www.harveygulf.com |
| Helix Energy Solutions | Houston, TX; Gulf of Mexico & international | https://www.helixesg.com |
| Hornbeck Offshore Services | Covington, LA; Gulf of Mexico & international | https://www.hornbeckoffshore.com |
| L&M Botruc Rental | Galliano, LA | https://www.botruc.com |
| Laborde Marine | New Orleans, LA | https://www.labordemarine.com |
| Laredo Offshore Services | Belle Chasse, LA | https://offshore.laredogroup.org |
| Leviathan Offshore LLC | Houma, LA | https://leviathanoffshorellc.com |
| Louisiana International Marine (LIM) | Galliano, LA | https://www.louisianainternational.com |
| McDermott International | Houston, TX | https://www.mcdermott.com |
| Neale Marine Transportation | Morgan City, LA; Gulf inshore/inland waterways | https://www.nealemarine.com |
| Noble Corporation | Houston, TX | https://www.noblecorp.com |
| Northstar Marine Inc. | Clermont, NJ | https://www.northstarmarineinc.com |
| Oceaneering International | Houston, TX | https://www.oceaneering.com |
| Odyssea Marine | Larose, LA | https://www.odysseamarine.com |
| Offshore Liftboats LLC | Cut Off, LA | https://www.offshoreliftboats.com |
| Otto Candies LLC | Des Allemands, LA; Gulf of Mexico | https://www.ottocandies.com |
| Patriot Offshore Maritime Services | New Bedford, MA | https://patriotoffshoremaritime.com |
| Phoenix International Holdings | Largo, MD | https://www.phnx-international.com |
| Port of Pensacola | Pensacola, FL | https://www.cityofpensacola.com/683/Port-of-Pensacola |
| PTL Marine | LA; Gulf of Mexico | https://www.ptlmarine.com |
| Rodi Marine | Lafayette, LA | https://www.rodimarine.com |
| Sea Services North America | Waterford, CT | https://ss-na.com |
| SEACOR Marine | Fort Lauderdale, FL; Gulf of Mexico | https://www.seacormarine.com |
| Seadrill Americas | Houston, TX | https://www.seadrill.com |
| SeaTran Marine | Morgan City, LA; Gulf of Mexico | https://www.seatranmarine.com |
| Seaward Services Inc. | Panama City, FL | https://www.seawardservices.com |
| Shore Offshore Services LLC | Houston, TX | https://shoreoffshore.com |
| Smith Marine Towing | Morgan City, LA | https://www.smithmarinetowing.com |
| Specialty Diving of Louisiana | Loranger, LA | https://www.sdive.com |
| Stabbert Maritime Holdings | Seattle, WA; Pacific Northwest & Alaska | https://www.stabbertmaritime.com |
| T & D Towing | Amelia, LA | https://www.tdtowing.com |
| T&T Marine Salvage | Houston, TX; Gulf of Mexico | https://www.tandtgroup.com |
| Thoma-Sea Marine Constructors | Houma, LA | https://www.thoma-sea.com |
| Transocean | Houston, TX | https://www.deepwater.com |
| Valaris Limited | Houston, TX | https://www.valaris.com |
| Vantage Drilling International | Houston, TX | https://vantagedrilling.com |
| WINDEA CTV LLC | Norwalk, CT | https://windea.com |
| WindServe Marine | Staten Island, NY | https://www.windservemarine.com |