| Uss Gary Works | Gary | 5.7M |
| Cleveland-Cliffs Burns Harbor Llc | Burns Harbor | 2.6M |
| Gibson Generating Station | Owensville | 462.9k |
| Merom Generating Station | Sullivan | 159.3k |
| Nipsco R.m.schahfer Generating Station | Wheatfield | 139.7k |
| Rockport Plant | Rockport | 51.1k |
| Alcoa Warrick Newco Llc | Newburgh | 43.6k |
| Clifty Creek Station | Madison | 40.0k |
| Duke Energy Indiana Inc. Cayuga Generating Station | Cayuga | 39.6k |
| Steel Dynamics Inc-Engineered Bar Products Div | Pittsboro | 29.3k |
| Buzzi Unicem Usa-Greencastle Plant | Greencastle | 18.6k |
| Nucor Steel | Crawfordsville | 18.2k |
| Cleveland-Cliffs Steel Llc | East Chicago | 15.1k |
| Steel Dynamics Inc Structural & Rail Div | Columbia City | 10.4k |
| Steel Dynamics Inc-Flat Roll Div | Butler | 8.7k |
| The Ford Meter Box Co Inc | Wabash | 7.5k |
| Waelz Sustainable Products Llc | Logansport | 5.8k |
| Azz Galvanizing Services-Hamilton | Hamilton | 4.0k |
| Cleveland-Cliffs Steel Llc | East Chicago | 3.0k |
| Molding Products Llc | South Bend | 2.7k |
| Nipsco Michigan City Generating Station | Michigan City | 2.5k |
| Azz Galvanizing Services-Plymouth | Plymouth | 2.4k |
| Indiana Galvanizing Llc | Middlebury | 2.2k |
| Toyota Motor Manufacturing Indiana Inc | Princeton | 1.8k |
| Us Steel Corp Midwest Plant | Portage | 1.6k |
| Azz Galvanizing Services-Muncie | Muncie | 1.5k |
| Waupaca Foundry-Plant 5 | Tell City | 1.4k |
| Marson | Elkhart | 1.3k |
| Real Alloy Specification Llc | Wabash | 1.2k |
| Sdi Lafarga Llc | New Haven | 994 |
| Crossroads Galvanizing Llc | Lafayette | 936 |
| Real Alloy Recycling Llc | Wabash | 924 |
| Halox Div Of Icl Specialty Products Inc. | Hammond | 797 |
| Ipl Petersburg | Petersburg | 764 |
| Crossroads Seamless Usa Llc | Winamac | 750 |
| Bf Goodrich Tire Manufacturing | Woodburn | 730 |
| Triplex Plating Co Inc | Michigan City | 685 |
| Electric Coating Technologies Llc D/B/A Material Sciences Co | East Chicago | 589 |
| Sigeco F B Culley Generating Station | Newburgh | 580 |
| Heartland Pet Food Manufacturing Indiana Llc | Richmond | 516 |
| Duke Energy Indiana Inc. - Edwardsport Igcc | Edwardsport | 503 |
| Netshape Technologies - Campbellsburg Facility | Campbellsburg | 450 |
| Contitech Usa Inc. | Auburn | 417 |
| Best Metal Finishing / Efg Osgood | Osgood | 350 |
| Dalton Corp Warsaw Manufacturing Facility | Warsaw | 281 |
| Heritage Environmental Services Llc | Indianapolis | 255 |
| Modineer - Hoosier Tank | South Bend | 250 |
| Parker Hannifin Corp | Goshen | 160 |
| Grain Processing Corp | Washington | 152 |
| Tms International Llc | Gary | 120 |
| Ashley Industrial Molding Inc | Ashley | 85 |
| Idemitsu Lubricants America Corp | Jeffersonville | 84 |
| Ppg Lafayette | Lafayette | 73 |
| Superior Aluminum Alloys Llc | New Haven | 53 |
| Am Stabilizers Corp | Valparaiso | 36 |
| Industrial Plating Inc | Lafayette | 34 |
| Honda Developlement & Manufacturing Llc - Iap | Greensburg | 34 |
| Royal Adhesives & Sealants | South Bend | 28 |
| Resonac Powdered Metals America Inc. | Greensburg | 27 |
| Gm Truck Group Fort Wayne Assembly | Roanoke | 22 |
| Cummins Inc Columbus Midrange Engine Plant | Columbus | 17 |
| Linde Inc | East Chicago | 17 |
| Prysmian Cables & Systems Usa Llc | Indianapolis | 15 |
| Brc Rubber& Plastics Inc | Montpelier | 12 |
| Micronutrients Usa Llc | Indianapolis | 11 |
| Subaru Of Indiana Automotive Inc | Lafayette | 10 |
| Teijin Automotive Technologies North Carolina Composites Ll | Grabill | 10 |
| Nishikawa Cooper Llc | Topeka | 6 |
| Araymond Manufacturing Center N.a. Inc. | Logansport | 5 |
| Uniseal Inc | Evansville | 5 |
| Unilever Manufacturing (Us) Inc - (Former Hpc-Usa) | Hammond | 5 |
| Uniseal Inc. | Evansville | 5 |
| Advanced Bearing Materials Llc | Greensburg | 4 |
| Tradebe Treatment & Recycling Llc | East Chicago | 4 |
| Mid-States Rubber Products Inc | Princeton | 3 |
| King Systems Corp | Noblesville | 3 |
| Industrial Dielectrics Inc. Dba Idi Composites Internationa | Noblesville | 2 |
| Industrial Dielectrics Inc. | Noblesville | 2 |
| Brc Rubber & Plastics Inc | Bluffton | 1 |
| 107777 - Brc Rubber & Plastics Inc | Hartford City | 1 |
| Southwire Co Llc | Lafayette | 1 |
| Belden | Richmond | 1 |
| Nucor Fastener | Shelbyville | 0 |
| Proform Finishing Products - Jasper | Rensselaer | 0 |
| American Renolit Corp | La Porte | 0 |
| Kent Nutrition Group Inc | Logansport | 0 |
| Land O'lakes Purina Feed Llc - Richmond | Richmond | 0 |
| Berry Global Inc | Evansville | 0 |
| Bootz Plumbing Ware Co | Evansville | 0 |
| Ticona Polymers Inc | Evansville | 0 |
| Purina Animal Nutrition Llc - Evansville | Evansville | 0 |
| Lucas Oil Products Inc | Corydon | 0 |
| Blue Grass Chemical Specialtie S L.l.c. | New Albany | 0 |
| Mead Johnson Nutrition | Evansville | 0 |
| Lyondellbasell Advanced Polymers Inc. | Evansville | 0 |
| Ampacet Corp | Terre Haute | 0 |
| Lord Corp | Indianapolis | 0 |
| Coleman Cable Llc East Facility | Bremen | 0 |
| Purina Animal Nutrition Llc - Frankfort | Frankfort | 0 |
| Safety-Kleen Systems Inc. | East Chicago | 0 |