| Al Larson Boat Shop | San Pedro, CA | https://www.larsonboat.com |
| Alaska Marine Lines (Lynden) | Seattle, WA; AK, HI | https://www.lynden.com |
| Albemarle Tug Company | Hampton Roads, VA | https://www.ablemarletugco.com |
| AM&O Towing | East Liverpool, OH | https://www.amotowing.com |
| Amak Towing Company | Ketchikan, AK | https://www.amaktowing.com |
| American Tugs & Barge | Guayama, PR | https://www.ati-pr.com |
| AmNav Maritime Corporation | Los Angeles / Long Beach, CA | https://www.amnav.com |
| Ashton Marine | North Muskegon, MI | https://ashtontugs.com |
| Bay-Houston Towing Company | Houston, TX; Port of Houston | https://www.bayhouston.com |
| Baydelta Maritime | Pittsburg, CA; San Francisco Bay, Sacramento–San Joaquin Delta | https://www.baydeltamaritime.com |
| Bering Marine Corporation (Lynden) | Anchorage, AK; Western Alaska coastal villages | https://www.lynden.com |
| Bernert Barge Lines | Portland, OR; Columbia/Willamette River system | https://www.bernertbargelines.com |
| Bisso Marine / E.N. Bisso & Son | New Orleans, LA; Lower Mississippi, Gulf ports | https://www.enbisso.com |
| Bollinger Shipyards | Lockport, LA; multiple Gulf Coast yards | https://www.bollingershipyards.com |
| Boone Towing | LA; Gulf inland waterways | https://www.boonetowing.com |
| Borinken Marine Group | San Juan, PR; Puerto Rico, Caribbean | https://www.bmg-pr.com |
| Bowhead Transport | Seattle, WA | https://www.bowheadtransport.com |
| Broussard Brothers | Intracoastal City, LA | https://www.broussardbrothers.com |
| Brusco Tug & Barge | Rainier, OR; Columbia/Willamette Rivers, OR & WA coast | https://www.bruscotug.com |
| Buchanan Marine | Haverstraw, NY; Hudson River, New York Harbor | https://www.buchananmarinelp.com/ |
| Buffalo Marine Services | Galveston, TX; Galveston, Houston Ship Channel | https://www.buffalomarine.com |
| Cabras Marine Corporation | Guam, GU; Western Pacific | https://www.cabtug.com |
| Carver Marine Towing | New York, NY | https://www.carvercompanies.com |
| Catalina Freight Line | Wilmington, CA | https://catalinafreight.wixsite.com/catfreight |
| Centerline Logistics | Tacoma, WA | https://www.centerlinelogistics.com |
| Chesapeake Shipbuilding | Salisbury, MD | https://www.chesapeakeshipbuilding.com |
| Cook Inlet Tug & Barge | Anchorage, AK; Cook Inlet, Gulf of Alaska | https://www.cookinlettug.com |
| Crescent Marine Towing Inc. | New Orleans, LA; Gulf Coast, inland | http://www.crescentmarine.net |
| Crescent Towing & Salvage | New Orleans, LA; Gulf ports | https://www.crescenttowing.com |
| Crofton Industries | Portsmouth, VA | https://www.crofton.com |
| Crosby Tugs LLC | Galliano, LA | https://www.crosbytugs.com |
| Crowley Maritime | Jacksonville, FL | https://www.crowley.com |
| Curtin Maritime Corporation | Long Beach, CA; US West Coast | https://www.curtinmaritime.com |
| Cvitanovic Boat Service Inc. | Belle Chasse, LA | https://www.ctugs.com |
| Dann Marine Towing | Chesapeake City, MD; Chesapeake Bay, East Coast | https://www.dannmarinetowing.com |
| Dann Ocean Towing | Tampa, FL; Gulf, Caribbean, worldwide | https://www.dannoceantowing.com |
| Delta Marine Logistics | New Orleans, LA | https://deltamarinelogistics.com/ |
| Donjon Marine | Hillside, NJ; East Coast & Gulf | https://www.donjon.com |
| Dunlap Towing Company | Seattle, WA; Puget Sound, AK, HI | https://www.dunlaptowing.com |
| Eagle Marine Towing | Houma, LA | https://www.emtowing.com |
| Eastern Shipbuilding Group | Panama City, FL | https://www.easternshipbuilding.com |
| Echo Marine / Echo Towing Service | TX; Gulf Coast ports | http://www.echomarineltd.com |
| Egan Marine Corporation | Lemont, IL; Lake Michigan, Chicago waterways | https://www.eganmarine.com |
| Foss Maritime (Saltchuk) | Seattle, WA; West Coast, AK, HI | https://www.foss.com |
| Fremont Tugboat Company | Seattle, WA | https://www.fremonttugboatcompany.com |
| G&H Towing Company | Houston, TX | http://www.gandhtowing.com |
| Gaelic Tugboat Company | New York, NY; New York Harbor | http://www.gaelictugboat.com |
| General Ship Repair | Baltimore, MD | http://generalshiprepair.com |
| Genesis Marine | Houston, TX; Gulf intracoastal, Mississippi system | https://www.genesisenergy.com/ |
| Geo. Gradel Co. | Toledo, OH | https://geogradelco.com/ |
| Global Diving & Salvage | Seattle, WA; US West Coast, AK | https://www.globaldivingandsalvage.com |
| Gulf Coast Tugs | Fort Lauderdale, FL | https://www.gulfcoasttugs.com |
| Harbor Docking & Towing | Lake Charles, LA | https://www.harbordocking.com |
| Harbor Towing & Fleeting | New Orleans, LA | https://www.harbortowingllc.com |
| Hays Tug & Launch Service Inc. | Toledo, OH; Lake Erie, western Great Lakes | https://www.haystug.com |
| Hines Furlong Line | Jacksonville, FL | https://www.hinesfurlongline.com |
| Host Towing, LLC | Corpus Christi, TX; South Texas coast | https://www.hosttowing.com |
| Hyak Maritime | Seattle, WA; Puget Sound | https://www.hyakmaritime.com |
| Inland Marine Service | Hebron, KY | http://www.inlandmarineservice.com |
| Inlandboatmen's Union of the Pacific (IBU) | Seattle, WA; West Coast, Alaska, Hawaii | https://ibu.org/ |
| Intracoastal Tug & Barge Company (IntraTug) | Houston, TX | https://www.intratug.com |
| JT Marine | Vancouver, WA | https://www.jtmarineinc.com |
| Lind Marine | Vallejo, CA | https://www.lindmarine.com |
| Louisiana International Marine (LIM) | Galliano, LA | https://www.louisianainternational.com |
| Madere & Sons Towing | Belle Chasse, LA | https://www.maderetowing.com |
| Main Iron Works | Houma, LA | https://mainironworks.com/ |
| Marine Group Boat Works | Chula Vista, CA | https://www.marinegroupbw.com |
| Marine Towing of Tampa | Tampa, FL | https://www.marinetowing.com |
| Martin Midstream | ME; Maine coast, New England harbors | https://mmlp.com/home/default.aspx |
| Master Boat Builders | Bayou La Batre, AL | https://www.masterboat.net |
| McAllister Towing | New York, NY; ME through PR | https://www.mcallistertowing.com |
| McDonough Marine Service | New Orleans, LA; Gulf Coast & inland | https://www.mcdonoughmarine.com |
| McKinney Salvage | Port Arthur, TX; Southeast Texas, Southwest Louisiana | https://www.mckinneysalvage.com |
| MCM Marine | Sault Ste. Marie, MI | http://www.mcmmarine.com |
| McNational Inc. | South Point, OH | https://www.mcnational.com |
| Miller's Launch | Staten Island, NY | https://www.millerslaunch.com |
| Missouri River Towing | Hermann, MO | https://www.missouririvertowing.com |
| Moran Towing | Greenwich, CT; 17 ports East & Gulf Coast | https://www.morantug.com |
| Nichols Brothers Boat Builders | Freeland, WA | https://www.nicholsboats.com |
| Norfolk Tug Company | Norfolk, VA | https://www.norfolktug.com |
| NYS Marine Highway Transportation | Troy, NY | https://nysmarinehighway.com |
| O'Rourke Marine Services | Ithaca, NY; Northeast coast | https://www.msp.energy/marine-fuel/ |
| P&L Towing and Transportation | Davie, FL | https://www.pandltowing.com |
| P&R Water Taxi | Honolulu, HI | https://www.pnrwatertaxi.com |
| Patriot Marine Services | Lockport, LA | https://www.patriotmarineservicesllc.com |
| Penobscot Bay Tractor Tug | Searsport, ME; Penobscot Bay | http://www.fourniertugs.com |
| Port City Marine Services, Inc. | Mobile, AL; Port of Mobile, Gulf ports | https://www.portcitymarine.com |
| Resolve Marine Group | Fort Lauderdale, FL; US & worldwide | https://www.resolvemarine.com |
| River Salvage Company | Pittsburgh, PA | https://www.riversalvage.com |
| Robbins Maritime | Norfolk, VA | https://www.robbinsmaritime.com |
| Roen Salvage Company | Sturgeon Bay, WI; Great Lakes | https://www.roensalvage.com |
| Salmon Bay Barge Line | Seattle, WA; Puget Sound, Pacific Northwest | http://www.sbaybarge.com |
| Samson Tug & Barge | Seattle, WA | https://www.samsontug.com |
| Sause Bros. Ocean Towing | Coos Bay, OR; Pacific Coast, HI, AK | https://www.sause.com |
| Seafarers International Union (SIU) | Camp Springs, MD; halls nationwide | https://www.seafarers.org |
| SeaTran Marine | Morgan City, LA; Gulf of Mexico | https://www.seatranmarine.com |
| SENESCO Marine (Reinauer) | North Kingstown, RI | https://senescomarine.com/ |
| Serodino Inc. | Chattanooga, TN | https://www.serodinoinc.com |
| Shaver Transportation Company | Portland, OR; Columbia & Willamette Rivers | https://www.shavertransportation.com |
| Signet Maritime Corporation | Houston, TX; Beaumont, Port Arthur, Sabine Pass, Gulf ports | https://www.signetmaritime.com |
| Smith Marine Towing | Morgan City, LA | https://www.smithmarinetowing.com |
| Stabbert Maritime Holdings | Seattle, WA; Pacific Northwest & Alaska | https://www.stabbertmaritime.com |
| Stevens Towing Company | Yonges Island, SC; East Coast & offshore | https://www.stevens-towing.com/ |
| Strategic Towing Services | FL; Southeast US coastwise | https://strategictowingservices.com/ |
| Suderman & Young Towing Company | Houston, TX; Houston Ship Channel, Gulf ports | https://www.sandy-tugs.com |
| Superior Maritime Services | Weston, FL | https://superiormaritimesvcs.com |
| T & D Towing | Amelia, LA | https://www.tdtowing.com |
| T&T Marine Salvage | Houston, TX; Gulf of Mexico | https://www.tandtgroup.com |
| The Great Lakes Group | Cleveland, OH; all Great Lakes ports | https://www.thegreatlakesgroup.com |
| Thoma-Sea Marine Constructors | Houma, LA | https://www.thoma-sea.com |
| Tidewater Transportation & Terminals | Vancouver, WA; Columbia River system | https://www.tidewater.com |
| Titan Marine Towing | TX; Gulf of Mexico | https://thetitanmarine.com/ |
| TradeWinds Towing Company | LA / TX; Gulf of Mexico ports, inland waterways | https://tradewindstowing.com/ |
| Vane Brothers | Baltimore, MD | https://www.vanebrothers.com |
| VanEnkevort Tug & Barge | Escanaba, MI | https://www.vtbarge.com |
| Vitus Energy | AK; Western Alaska, Arctic | https://www.vitus-energy.com/ |
| Westar Marine Services | San Francisco Bay, CA | https://www.westarmarineservices.com |
| Western Towboat Company | Seattle, WA; Puget Sound, AK, Pacific | https://www.westerntowboat.com |
| Wilmington Tug | Wilmington, NC; Port of Wilmington & Southeast | https://www.wilmingtontug.com |
| Young Brothers (Saltchuk) | Honolulu, HI | https://www.htbyb.com |