| ITIndustrial Technologies Group ITG Field Controls | Kinston | NC | 100–499 | ◐ LIKELY ACTIVE |
| ITIndustrial Technologies Group ITG Precision Engineering | Uxbridge | MA | 20–99 | ◐ LIKELY ACTIVE |
| ITIndustrial Technologies Group ITG WakefieldNashua | Nashua | NH | 100–499 | ◐ LIKELY ACTIVE |
| IFInfrastructure Fabrication LLC | Bath | PA | — | ◐ LIKELY ACTIVE |
| ITInlet Tools, INC | Conneautville | PA | — | ◐ LIKELY ACTIVE |
| IFInnovation First Manufacturing, Inc. | Greenville | TX | 20–99 | ◐ LIKELY ACTIVE |
| IEInnovative Engineered Solutions | Wilmington | OH | 20–99 | ◐ LIKELY ACTIVE |
| IDInrock Drilling Systems | Houston | TX | 20–99 | ◐ LIKELY ACTIVE |
| IFIntegral Fabrication & Engineering, LLC | Orlando | FL | — | ◐ LIKELY ACTIVE |
| IMIntegrated Machining CO | Albuquerque | NM | — | ◐ LIKELY ACTIVE |
| IMIntegrated Machining Solutions INC | Norwalk | CA | — | ◐ LIKELY ACTIVE |
| IIIntegration INC | Albuquerque | NM | — | ◐ LIKELY ACTIVE |
| IEIntegrity Engineering Holding, Inc | Ramsey | MN | 20–99 | ◐ LIKELY ACTIVE |
| IMIntegrity Machining, INC | Augusta | IL | — | ◐ LIKELY ACTIVE |
| IVIntellectual Ventures Property Holdings LLC | Bellevue | WA | — | ◐ LIKELY ACTIVE |
| ISIntellifab Solutions LLC | Atlanta | GA | — | ◐ LIKELY ACTIVE |
| IMInter-city Manufacturing, INC. | Seaside | CA | — | ◐ LIKELY ACTIVE |
| IMInterior Mobile Welding & Services INC | Fairbanks | AK | — | ◐ LIKELY ACTIVE |
International Computer Appliances Corporation | Minneapolis | MN | 100–499 | ◐ LIKELY ACTIVE |
| IQInternational Quality Advantage LLC | Windsor Mill | MD | — | ◐ LIKELY ACTIVE |
International Tool and Manufacturing, INC | Fairfield | NJ | — | ◐ LIKELY ACTIVE |
| ICInvicta Contracting LLC | Osburn | ID | — | ◐ LIKELY ACTIVE |
| IGIra G Steffy & Son, Inc. | Ephrata | PA | 100–499 | ◐ LIKELY ACTIVE |
| IDir Distributers D. B. A. The Metal Shop | Dunnellon | FL | 20–99 | ◐ LIKELY ACTIVE |
| ISIron Sharpens Iron Welding & Fabricating, INC | Minneola | FL | — | ◐ LIKELY ACTIVE |
| ISIrwin Steel LLC | Justin | TX | 100–499 | ◐ LIKELY ACTIVE |
| IDIsidore DBA Twin Oaks Manufacturing | San Jose | CA | 1–19 | ◐ LIKELY ACTIVE |
| IMIsland Machine, INC | Everett | WA | — | ◐ LIKELY ACTIVE |
| ILIstanbul Logistics Aluminum Trading LLC | Vienna | VA | — | ◐ LIKELY ACTIVE |
| ICItech Custom Manufacturing and Design INC. | Riviera Beach | FL | — | ◐ LIKELY ACTIVE |
| IBITW Building Components Group Inc - Earth City, MO | Earth City | MO | 1–19 | ◐ LIKELY ACTIVE |
| IBITW Building Components Group Inc - Ft. Lauderdale | Fort Lauderdale | FL | 20–99 | ◐ LIKELY ACTIVE |
| IBITW Building Components Group Inc - Glenview, IL | Glenview | IL | 500+ | ◐ LIKELY ACTIVE |
| IBITW Building Components Group Inc - Grand Prairie, TX | Grand Prairie | TX | 20–99 | ◐ LIKELY ACTIVE |
| IBITW Building Components Group Inc - Litchfield | Litchfield | IL | 20–99 | ◐ LIKELY ACTIVE |
| IBITW Building Components Group Inc - Orlando | Orlando | FL | 1–19 | ◐ LIKELY ACTIVE |
| IBITW Building Components Group Inc - Pontotoc, MS | Pontotoc | MS | 20–99 | ◐ LIKELY ACTIVE |
| IBITW Building Components Group Inc - Sacramento, CA | Sacramento | CA | 1–19 | ◐ LIKELY ACTIVE |
| IHITW Heartland - Manufactured Products | Alexandria | MN | 20–99 | ◐ LIKELY ACTIVE |
| IJIvan Jukic & Jure Jukic Partners | Milford | CT | — | ◐ LIKELY ACTIVE |
| INIVI North, Inc. | Greenville | WI | 100–499 | ◐ LIKELY ACTIVE |
| INIVI North, Inc. - OK Branch | Muskogee | OK | 1–19 | ◐ LIKELY ACTIVE |
| ISIVI South, Inc. | Inman | SC | 20–99 | ◐ LIKELY ACTIVE |
| JEJ5 Enterprises, LLC | Moscow Mills | MO | — | ◐ LIKELY ACTIVE |
| JLJabil Lewis Engineering | Grand Junction | CO | 20–99 | ◐ LIKELY ACTIVE |
| JJackson-Cook | Tallahassee | FL | 20–99 | ◐ LIKELY ACTIVE |
| JFJackson Field Welding Services, INC. | Tenino | WA | — | ◐ LIKELY ACTIVE |
| JJacksonville | Jacksonville | TX | 100–499 | ◐ LIKELY ACTIVE |
| JAJacobs Acquisition CO LLC | Hanover | PA | — | ◐ LIKELY ACTIVE |
| JPJacobs Precision Welding, INC | Lead | SD | — | ◐ LIKELY ACTIVE |
| JMJaco Machine LLC | Amory | MS | — | ◐ LIKELY ACTIVE |
| JLJadeforge LLC | Gainesville | FL | — | ◐ LIKELY ACTIVE |
| JTJaeckel Tool and Manufacturing, INC | Athens | TX | — | ▲ REPORTED CLOSED |
| JMJah Machine INC. | Brea | CA | — | ◐ LIKELY ACTIVE |
| JRJame Roll Form Products, LLC | Franklin Park | IL | 100–499 | ◐ LIKELY ACTIVE |
| JBJames B. Maxwell | Grandview | MO | — | ◐ LIKELY ACTIVE |
| JHJames Howard D | Huntington Beach | CA | — | ◐ LIKELY ACTIVE |
| JAJ and B Manufacturing INC | Fort Walton Beach | FL | — | ◐ LIKELY ACTIVE |
| JAJ and D Steel Fabrication and Repair, LP | Santa Maria | CA | 1–19 | ◐ LIKELY ACTIVE |
| JSJasper Steel Works LLC | Williamsport | PA | 1–19 | ◐ LIKELY ACTIVE |
| JTJasper TN | Jasper | TN | 100–499 | ◐ LIKELY ACTIVE |
| JCJb Cook Auto Machine CO LLC | Memphis | TN | — | ◐ LIKELY ACTIVE |
| JMJbk Machining | Berkeley Springs | WV | — | ◐ LIKELY ACTIVE |
| JMJ.c. Manufacturing LLC | Fort Worth | TX | — | ◐ LIKELY ACTIVE |
| JMJcp Machine Shop, LLC | Clermont | FL | — | ◐ LIKELY ACTIVE |
| JDJ D Precision LLC | Riverton | UT | — | ◐ LIKELY ACTIVE |
| JHJeffery Hughes | Munford | AL | — | ◐ LIKELY ACTIVE |
| JNJeff Norman Enterprises, INC. | Meridianville | AL | — | ◐ LIKELY ACTIVE |
| JSJeffords Steel and Engineering Company - Plattsburgh | Plattsburgh | NY | 20–99 | ◐ LIKELY ACTIVE |
| JSJeffords Steel and Engineering Company - Potsdam | Potsdam | NY | 20–99 | ◐ LIKELY ACTIVE |
| JMJeffrey Machine Inc. | Birmingham | AL | 100–499 | ◐ LIKELY ACTIVE |
Jeglinski Group Inc. DBA Moon Tool & Die Co. | Meadville | PA | 1–19 | ◐ LIKELY ACTIVE |
| JCJejobele CORP | Tamuning | GU | — | ◐ LIKELY ACTIVE |
| JMJ.E. Monahan Metals, Inc. | Queensbury | NY | 1–19 | ◐ LIKELY ACTIVE |
| JMJendyk Manufacturing INC | Swainsboro | GA | — | ◐ LIKELY ACTIVE |
| JCJenidas Corporation DBA Gene Davis Sales and Service | Erie | PA | 20–99 | ◐ LIKELY ACTIVE |
| JJennmar | Cresson | PA | 20–99 | ◐ LIKELY ACTIVE |
| JCJennmar Corporation of Virginia, Inc. | Cedar Bluff | VA | 100–499 | ◐ LIKELY ACTIVE |
| JCJennmar Corporation of Virginia inc. Specialty Products | Cedar Bluff | VA | 20–99 | ◐ LIKELY ACTIVE |
| JSJennmar Specialty Cedar Bluff | Cedar Bluff | VA | 20–99 | ◐ LIKELY ACTIVE |
| JSJENNMAR Specialty Products - Louisville, LLC | Louisville | KY | 20–99 | ◐ LIKELY ACTIVE |
| JWJennmar West Kentucky | Earlington | KY | 20–99 | ◐ LIKELY ACTIVE |
| JMJensen Metal Products | Racine | WI | 20–99 | ◐ LIKELY ACTIVE |
| JPJerrod Pedley | Tucson | AZ | — | ◐ LIKELY ACTIVE |
| JMJet Machine Machine Works, Inc. | Houston | TX | 20–99 | ◐ LIKELY ACTIVE |
| JMJewett Machine Mfg. Co., Inc. | Richmond | VA | 20–99 | ◐ LIKELY ACTIVE |
| JLJh.d.s., LLC | Lincoln Park | NJ | — | ◐ LIKELY ACTIVE |
| JIJifco Inc. of Texas | Kosse | TX | 20–99 | ◐ LIKELY ACTIVE |
| JMJims Machining | Camarillo | CA | 20–99 | ◐ LIKELY ACTIVE |
| JJJ & J Alloys - 501 | Pearland | TX | 20–99 | ◐ LIKELY ACTIVE |
| JJJ & J Alloys - 520 | Houston | TX | 1–19 | ◐ LIKELY ACTIVE |
| JMJ&J Machine llc | Appleton | WI | 20–99 | ◐ LIKELY ACTIVE |
| JJJ & J Machine, LTD | Muskegon | MI | — | ◐ LIKELY ACTIVE |
| JMJ&j Machining, LLC | Wichita | KS | — | ◐ LIKELY ACTIVE |
| JKJ. K. Manufacturing CO. | Bedford Park | IL | 20–99 | ◐ LIKELY ACTIVE |
| JKJ. Kozel & Son, Inc. dba Kozel Steel | Rochester | NY | 20–99 | ◐ LIKELY ACTIVE |
| JCJL Components | Kansas City | MO | 20–99 | ◐ LIKELY ACTIVE |
| JMJ Machining & Fabrication LLC | Tabor | IA | — | ◐ LIKELY ACTIVE |
| JCJM Conveyors of PA | Blairsville | PA | 20–99 | ◐ LIKELY ACTIVE |
J&M Machine Products Inc. | Muskegon | MI | 20–99 | ◐ LIKELY ACTIVE |