| OPOffco-offset Printing CO | Fairfield | CA | — | ◇ UNVERIFIED |
| OOOffice of State Publishing | West Sacramento | CA | — | ◇ UNVERIFIED |
| OVOhio Valley Screenprinting, Inc. | Lawrenceburg | IN | — | ◇ UNVERIFIED |
| OCOil Capitol Neon | Tulsa | OK | — | ◇ UNVERIFIED |
| OPOjai Printing & Publishing CO. | Ojai | CA | — | ◇ UNVERIFIED |
| OCOJ Clothing & Printing LLC | Apache Junction | AZ | — | ◇ UNVERIFIED |
| OAOklahoma Apparel LLC | Newcastle | OK | — | ◇ UNVERIFIED |
| OIO'kote INC | Santa Paula | CA | — | ◇ UNVERIFIED |
| OEOkumus Enterprises, LTD. Dba Star Label Products | Fairless Hills | PA | — | ◇ UNVERIFIED |
| OMOlan Mills, INC. Amnicola Hwy Plant | Chattanooga | TN | — | ◇ UNVERIFIED |
| OWOlde World Corporation | Merced | CA | — | ◇ UNVERIFIED |
| OHOld Henry LLC | Roanoke | TX | — | ◇ UNVERIFIED |
| OLOld Lutheran INC Dba First Avenue Promotional | Moorhead | MN | — | ◇ UNVERIFIED |
| OSOld Stage Printing | Surgoinsville | TN | — | ◇ UNVERIFIED |
| OTOld Time Sports | Salisbury | MA | — | ◇ UNVERIFIED |
| OTOld Town Fiberglass INC Dba Fiberglass Fabricators | Orange | CA | — | ◇ UNVERIFIED |
| OPOlson Printing INC | Nashville | TN | — | ◇ UNVERIFIED |
| OPOlympak Printing & Packaging | Grand Rapids | MN | — | ◇ UNVERIFIED |
| OGOlympian Graphics INC | Oakland | CA | — | ◇ UNVERIFIED |
| OGOlympus Group Orlando CO | Orlando | FL | — | ◇ UNVERIFIED |
| OSOmaha Sign Group, Inc. | Omaha | NE | — | ◇ UNVERIFIED |
| OEOmar Ebrahimi dba Vividly Branded | Tracy | CA | — | ◇ UNVERIFIED |
| OFOme9a Franchises LLC | Ontario | OH | — | ◇ UNVERIFIED |
| OPOmega Printing | Palo Alto | CA | — | ◇ UNVERIFIED |
| OSOmi Specialty Products LLC | Fullerton | CA | — | ◇ UNVERIFIED |
| OEOmnitek Engineering CORP | Vista | CA | — | ◇ UNVERIFIED |
| OSOmnova Solutions INC. | Monroe | NC | — | ◇ UNVERIFIED |
| ODOn Demand 3d Technology, INC. | Tustin | CA | — | ◇ UNVERIFIED |
| ODOn Demand Mail Services LLC | Pontiac | MI | — | ◇ UNVERIFIED |
| ODOn Display Signs, Inc. | Louisville | KY | — | ◇ UNVERIFIED |
| OAOne Accord Corporation Dba Postageone | Valencia | CA | — | ◇ UNVERIFIED |
| ODOne Day Signs of Oregon INC | Bend | OR | — | ◇ UNVERIFIED |
| OPOneida Printing (former) | Green Bay | WI | — | ◇ UNVERIFIED |
| ODOneil Data Systems INC | Los Angeles | CA | — | ◇ UNVERIFIED |
| OPOneil Printing | Phoenix | AZ | — | ◇ UNVERIFIED |
| OSOne Source Printing and Graphics, INC. | Houston | TX | — | ◇ UNVERIFIED |
| OPOnesource Print Management Inc. | Lake Geneva | WI | — | ◇ UNVERIFIED |
| OSOne Stop Printing & Binding | Winnetka | CA | — | ◇ UNVERIFIED |
 Onetouchpoint Midwest CORP. | Green Bay | WI | — | ◇ UNVERIFIED |
| OTOne, Two, Three, INC. | Woodbury | NJ | — | ◇ UNVERIFIED |
| OLOn Line Graphics and Finishing | Orange | CA | — | ◇ UNVERIFIED |
| OLOn Line Graphics INC | Anaheim | CA | — | ◇ UNVERIFIED |
| OLOn Line Graphics, INC. | Orange | CA | — | ◇ UNVERIFIED |
| OSOnQ Solutions, Inc. | Akron | OH | — | ◇ UNVERIFIED |
| OSOnq Solutions INC | Hayward | CA | — | ◇ UNVERIFIED |
| OSOn Site Electrostatic Refinishing | Peabody | MA | — | ◇ UNVERIFIED |
| OTOn Taps LTD. | Chicago | IL | — | ◇ UNVERIFIED |
| OTOn Target Printing and Graphics LLC | Fairfield | NJ | — | ◇ UNVERIFIED |
| ONOntario Neon CO INC | Ontario | CA | — | ◇ UNVERIFIED |
| OTOn the Limit USA LTD | Duluth | MN | — | ◇ UNVERIFIED |
| OTOn Time Printz LLC | Hallandale Beach | FL | — | ◇ UNVERIFIED |
| OSOn-time Screen Printing & Embroidery, LLC | Derby | CT | — | ◇ UNVERIFIED |
| OTOn Time Signs | Fort Worth | TX | — | ◇ UNVERIFIED |
| OTOn Time Signs CORP. | Corona | NY | — | ◇ UNVERIFIED |
| OWOn Wings, INC. | Englewood | CO | — | ◇ UNVERIFIED |
 Onyx Industries INC | Harbor City | CA | — | ◇ UNVERIFIED |
| OHOpacity Holdings LLC | New York | NY | — | ◇ UNVERIFIED |
| OEOpc Equipment CO INC | Lemoore | CA | — | ◇ UNVERIFIED |
| OIOperation Imprint LLP | Ainsworth | IA | — | ◇ UNVERIFIED |
 Opsec Security/lancaster | Lancaster | PA | — | ◇ UNVERIFIED |
| ODOptical Disc Media | Valencia | CA | — | ◇ UNVERIFIED |
| OBOrange Box Productions Dba Fastsigns of Torrance | Torrance | CA | — | ◇ UNVERIFIED |
| OCOrange Circle Studio CORP. | Oceanside | CA | — | ◇ UNVERIFIED |
| OCOrange CO Name Plate CO INC | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| OCOrange County Broaching INC | Placentia | CA | — | ◇ UNVERIFIED |
| OCOrange County Industrial Plastics | Anaheim | CA | — | ◇ UNVERIFIED |
| OCOrange County Register Communications | Anaheim | CA | — | ◇ UNVERIFIED |
| OCOrange County Sheet Metal INC | Anaheim | CA | — | ◇ UNVERIFIED |
| OMOrb Media & Display Service | South Gate | CA | — | ◇ UNVERIFIED |
| OPOrca Printing | Memphis | TN | — | ◇ UNVERIFIED |
| OSOrchard Street Press LLC | Saint Francis | WI | — | ◇ UNVERIFIED |
| OSOrde Sign and Graphics, INC | De Pere | WI | — | ◇ UNVERIFIED |
| OCOregon City Signs INC | Oregon City | OR | — | ◇ UNVERIFIED |
| OIOrientations INC Dba Designer Sign Systems | Minneapolis | MN | — | ◇ UNVERIFIED |
| OIOrkiStrate, Inc. | Allentown | PA | — | ◇ UNVERIFIED |
| OAOrlando Apparel LLC | Orlando | FL | — | ◇ UNVERIFIED |
| OBormond beach printing llc | Ormond Beach | FL | — | ◇ UNVERIFIED |
| OVOrora Visual LLC | Niles | IL | — | ◇ UNVERIFIED |
| OVOrora Visual LLC | Los Angeles | CA | — | ◇ UNVERIFIED |
| OVOrora Visual Orange County | Fullerton | CA | — | ◇ UNVERIFIED |
| OMO'Rourke Media Group LLC | Seaford | DE | — | ◇ UNVERIFIED |
| ORO. R. Pechman CO | Saint Louis | MO | — | ◇ UNVERIFIED |
| OAOrtiz Art Drafts Designs LLC | Brooklyn | OH | — | ◇ UNVERIFIED |
| OAOrtiz Arts & Graphic Design LLC | Cleveland | OH | — | ◇ UNVERIFIED |
| OHOSDBA Holdings LLC | Portland | ME | — | ◇ UNVERIFIED |
| OEOsgood Enterprises Dba United Fabrication | Camarillo | CA | — | ◇ UNVERIFIED |
| OAOstrowski Associates | San Jose | CA | — | ◇ UNVERIFIED |
| OLOTS Legacy Signs Inc | Fort Worth | TX | — | ◇ UNVERIFIED |
| OPOtter Products | San Diego | CA | — | ◇ UNVERIFIED |
| OSOtto Screen Printing INC Tacoma | Tacoma | WA | — | ◇ UNVERIFIED |
| OROuter Rim Designs, LLC | Key Largo | FL | — | ◇ UNVERIFIED |
| OGOutfit Good LLC | Columbus | OH | — | ◇ UNVERIFIED |
| OGOutform Group | Union City | CA | — | ◇ UNVERIFIED |
| OMOutfront Media INC | Saint Paul | MN | — | ◇ UNVERIFIED |
| OMOutfront Media LLC | Stuart | FL | — | ◇ UNVERIFIED |
| OPOutput Printing Corp. | Tampa | FL | — | ◇ UNVERIFIED |
| OEOutside Edge, LLC. | Granville | OH | — | ◇ UNVERIFIED |
| OHOutsourcing Holdings Inc | Twinsburg | OH | — | ◇ UNVERIFIED |
| OCOutter City Arts LA LLC | Los Angeles | CA | — | ◇ UNVERIFIED |
| OGOutwest Graphics LLP | Fruita | CO | — | ◇ UNVERIFIED |
