| US Steel Corp - Gary Works | Nippon Steel | 10,928,816 | |
| Gibson | Duke Energy | 8,268,672 | |
| Cleveland-Cliffs Burns Harbor LLC | Cleveland-Cliffs | 7,644,163 | |
| Cleveland-Cliffs Steel LLC | Cleveland-Cliffs | 5,783,021 | |
| Clifty Creek | American Electric Power | 5,302,011 | |
| BP Whiting Business Unit | BP | 5,222,371 | |
| Petersburg | AES Corp. | 4,879,129 | |
| ALCOA INC - WARRICK OPERATIONS | Alcoa | 4,867,519 | |
| Merom | Hallador Energy | 4,641,576 | |
| Cayuga | Duke Energy | 4,188,340 | |
| Lawrenceburg Energy Facility | Energy Capital Partners | 3,420,808 | |
| Rockport | American Electric Power | 3,112,526 | |
| Edwardsport | Duke Energy | 2,815,764 | |
| A B Brown Generating Station | CenterPoint Energy | 1,982,201 | |
| IPL Eagle Valley Generating Station | AES Corp. | 1,855,770 | |
| St. Joseph Energy Center LLC | Ares Management | 1,817,718 | |
| R M Schahfer Generating Station | NiSource | 1,800,166 | |
| F B Culley Generating Station | CenterPoint Energy | 1,759,377 | |
| Harding Street Station (EW Stout) | AES Corp. | 1,700,381 | |
| LINDE - WHITING, IN 5&6 | Linde | 1,624,864 | |
| Michigan City Generating Station | NiSource | 1,477,536 | |
| Sugar Creek Generating Station | NiSource | 1,179,052 | |
| Indiana Harbor Coke Company | SunCoke Energy | 1,065,052 | |
| LONE STAR INDUSTRIES INC | Buzzi Unicem | 1,028,904 | |
| STEEL DYNAMICS INC | Steel Dynamics Inc. | 982,503 | |
| Carmeuse Lime, Inc. Buffington | Carmeuse | 896,323 | |
| Heidelberg Materials US Cement LLC | Heidelberg Materials | 833,267 | |
| Oaktown Fuels Mine No.1 | Hallador Energy | 728,931 | |
| Cleveland-Cliffs Steel LLC | Cleveland-Cliffs | 703,787 | |
| Oaktown Fuels Mine No. 2 | Hallador Energy | 593,823 | |
| SABIC INNOVATIVE PLASTICS MT. VERNON, LLC | Saudi Arabian Oil Company (Saudi Aramco) | 557,715 | |
| Gibson County Coal, LLC | Alliance Resource Partners | 533,986 | |
| Noblesville | Duke Energy | 513,413 | |
| Heidelberg Materials | Heidelberg Materials | 444,881 | |
| Duke Energy Vermillion, II LLC | Duke Energy | 395,166 | |
| COVANTA ENERGY | EQT AB | 355,034 | |
| STEEL DYNAMICS. INC. (SDI), STRUCTUAL AND RAIL DIVISION | Steel Dynamics Inc. | 328,103 | |
| Primary Products Ingredients Americas, LLC d/b/a Primient | KPS Capital Partners | 323,932 | |
| Purdue University-Wade Utility | State of Indiana | 259,288 | |
| NUCOR STEEL INDIANA | Nucor | 255,383 | |
| Wabash River Highland Plant | Wabash Valley Power Association | 244,078 | |
| Advanced Magnesium Alloys Corporation | Phoenix Global Holdings | 230,280 | |
| GRAIN PROCESSING CORP | Kent Corp. | 229,633 | |
| Valero Linden Plant | Valero Energy | 211,216 | |
| Columbia Gas of Ohio | NiSource | 210,537 | |
| Waupaca Foundry, Inc. | Bain Capital | 210,471 | |
| COUNTRYMARK REFINING & LOGISTICS LLC | CountryMark | 196,503 | |
| Francisco Underground Mine | Peabody Energy | 195,940 | |
| Portside Energy | SDCL Energy Efficiency Income Trust | 192,858 | |
| THE ANDERSONS MARATHON HOLDINGS LLC | Andersons Inc. | 191,801 | |
| Sycamore Ridge Landfill/Victory Landfill | Republic Services | 186,995 | |
| STEEL DYNAMICS, INC. (SDI) | Steel Dynamics Inc. | 186,944 | |
| Valero Renewable Fuels, LLC d/b/a Valero Bluffton Plant | Valero Energy | 180,313 | |
| Valero Renewable Fuels Company, LLC d/b/a Valero Mt. Vernon Plant | Valero Energy | 177,595 | |
| CGS Services Inc. | Waste Management Inc. | 177,181 | |
| CARDINAL ETHANOL, LLC | Cardinal Ethanol | 166,670 | |
| St. Paul Compressor Station | Blackstone | 165,459 | |
| Kaiser Aluminum Warrick LLC | Kaiser Aluminum | 159,628 | |
| LINDE - WHITING, IN 1-4 | Linde | 155,040 | |
| NIPSCO GAS | NiSource | 151,349 | |
| NEWTON COUNTY LANDFILL | Republic Services | 150,743 | |
| C. C. Perry K Steam Plant | CITIZENS ENERGY GROUP | 149,323 | |
| Henry County Generating Station | Duke Energy | 141,591 | |
| CENTRAL INDIANA ETHANOL, LLC | Henry Crown and Company | 138,983 | |
| POET BIOREFINING ALEXANDRIA | Poet LLC | 138,337 | |
| TYSON FRESH MEATS INC | Tyson Foods | 136,111 | |
| Green Plains Mount Vernon LLC | Green Plains Inc. | 133,621 | |
| POET Biorefining - Shelbyville | Poet LLC | 125,949 | |
| South Bend Ethanol, LLC. | Verbio | 125,746 | |
| TATE & LYLE SAGAMORE | Tate & Lyle | 124,457 | |
| POET Biorefining - North Manchester, LLC | Poet LLC | 123,005 | |
| LIBERTY LANDFILL | Waste Management Inc. | 122,704 | |
| UNIVERSITY OF NOTRE DAME | UNIVERSITY OF NOTRE DAME | 122,566 | |
| Ardagh Glass Inc. (Dunkirk) | Ardagh Packaging Group | 116,955 | |
| POET BIOREFINING - PORTLAND | Poet LLC | 115,876 | |
| Georgetown Substation | AES Corp. | 113,114 | 50% |
| Georgetown Substation | INDIANA MUNICIPAL POWER AGENCY | 113,114 | 50% |
| Cleveland-Cliffs Steel Corporation | Cleveland-Cliffs | 112,151 | |
| US Steel - Midwest Plant | Nippon Steel | 110,193 | |
| Columbia Gas of Pennsylvania | NiSource | 107,570 | |
| Pratt Paper (IN) LLC | Pratt Industries | 106,650 | |
| NLMK INDIANA | Fletcher Group Holdings Ltd | 99,614 | |
| Cleveland-Cliffs Tek Inc. and Cleveland-Cliffs Kote Inc. | Cleveland-Cliffs | 98,928 | |
| Bainbridge Compressor Station | Blackstone | 98,705 | |
| LOUIS DREYFUS COMPANY AGRICULTURAL INDUSTRIES LL | Louis Dreyfus | 91,741 | |
| Montpelier Electric Gen Station | Rockland Capital | 91,670 | |
| Ardagh Glass Inc. (Winchester) | Ardagh Packaging Group | 89,036 | |
| TWIN BRIDGES RDF | Waste Management Inc. | 88,133 | |
| INDIANA UNIVERSITY | INDIANA UNIVERSITY | 87,563 | |
| SAFETY-KLEEN SYSTEMS | Clean Harbors Inc. | 80,093 | |
| HAYES LANDFILL | RUMPKE CONSOLIDATED COS INC | 79,905 | |
| BARTHOLOMEW COUNTY LANDFILL II | Bartholomew County, IN | 78,388 | |
| Duke Energy Indiana CHP at Purdue University | Duke Energy | 75,932 | |
| EVONIK CORPORATION TIPPECANOE LABORATORIES | Evonik Industries | 75,021 | |
| SOUTH SIDE LANDFILL INC | 600 Land Inc. | 74,893 | |
| NATIONAL SERV-ALL LANDFILL | Republic Services | 72,771 | |
| COUNTY LINE LANDFILL | Republic Services | 71,908 | |
| BUNGE NORTH AMERICA | Bunge | 71,512 | |
| Cargill Texturizing Solutions | Cargill | 71,410 | |
| Indiana Gas Company | CenterPoint Energy | 70,461 | |
| Bunge North America (East) LLC | Bunge | 69,493 | |
| Elanco Clinton Laboratories | Elanco Animal Health | 67,886 | |
| Heidelberg Materials US Cement LLC | Heidelberg Materials | 67,822 | |
| OWENS-BROCKWAY GLASS CONTAINER INC. PLANT 08 | O-I Glass | 67,649 | |
| MEDORA SANITARY LANDFILL | RUMPKE CONSOLIDATED COS INC | 66,600 | |
| QUEMETCO INC | Ecobat | 65,755 | |
| MGPI of Indiana, LLC | MGP Ingredients | 65,361 | |
| 1500 South Tibbs LLC d/b/a Aurorium Indianapolis LLC | Pritzker Group | 64,807 | |
| Nestle USA Inc. - Anderson | Nestle | 64,656 | |
| Wheatland Generating Facility LLC | Duke Energy | 64,437 | |
| Ingredion Incorporated, Indianapolis Plant | Ingredion | 60,943 | |
| ANR Pipeline Celestine CS | TC Energy | 60,557 | |
| US GYPSUM - SHOALS PLANT | Knauf | 58,156 | |
| FRITO-LAY INC | PepsiCo | 57,169 | |
| REAL ALLOY SPECIFICATION, LLC. | REAL ALLOY HOLDING LLC | 57,086 | |
| TOYOTA MOTOR MFG IN INC | Toyota | 57,065 | |
| HAYNES INTERNATIONAL INCORPORATED | Acerinox | 56,641 | |
| WABASH VALLEY LANDFILL | Republic Services | 56,105 | |
| KNAUF Insulation GMBH | Knauf | 54,337 | |
| GENERAL MOTORS LLC BEDFORD CETC | General Motors | 52,720 | |
| PRAIRIE VIEW RDF | Waste Management Inc. | 52,168 | |
| PAPERWORKS INDUSTRIES INC | Sun Capital Partners | 51,272 | |
| Heritage-Crystal Clean, LLC | J.F. Lehman & Company | 51,236 | |
| ARCHER DANIELS MIDLAND | Archer Daniels Midland | 50,763 | |
| SUBARU of INDIANA AUTOMOTIVE INCORPORATED | Subaru Corporation | 49,356 | |
| Anchor Glass Container. - Plant 42 | CVC Capital Partners | 48,752 | |
| NEW PARIS PIKE LDFL | Richmond Sanitary District | 46,341 | |
| GEORGIA-PACIFIC GYPSUM LLC, WHEATFIELD, INDIANA | Koch Industries | 46,000 | |
| ELEMENT RESOURCES-GARFIELD FACILITY LLC | Atlas Holdings | 44,387 | |
| Azteca Milling - Evansville | Gruma | 43,899 | |
| Waelz Sustainable Products | EQT AB | 43,523 | 50% |
| Waelz Sustainable Products | Grupo Promax | 43,523 | 50% |
| GENERAL MOTORS FORT WAYNE ASSEMBLY | General Motors | 42,534 | |
| CLINTON COUNTY LANDFILL | Republic Services | 41,325 | |
| NIPSCO Electric Transmission | NiSource | 41,241 | |
| Ryobi Die Casting | Ryobi | 40,980 | |
| Iroquois Bio Energy Company | Energy Capital Partners | 40,468 | 50% |
| Iroquois Bio Energy Company | Harvestone Group | 40,468 | 50% |
| US GYPSUM - EAST CHICAGO PLANT | Knauf | 38,723 | |
| Vectren Energy Delivery of Ohio | CenterPoint Energy | 38,115 | |
| Gold Bond - SHO Plant | National Gypsum | 36,064 | |
| Worthington Generation | Hoosier Energy | 35,761 | |
| Worthington Landfill | Republic Services | 35,133 | |
| ARCONIC LAFAYETTE LLC | Apollo Global Management | 33,755 | |
| CATERPILLAR INCORPORATED | Caterpillar Inc. | 33,562 | |
| FCA KOKOMO CASTING PLANT | Stellantis | 33,558 | |
| Steel Dynamics, Inc. | Steel Dynamics Inc. | 33,510 | |
| DAVIESS COUNTY LANDFILL | Daviess County, IN | 32,759 | |
| SUPERIOR ALUMINUM ALLOYS LLC | Steel Dynamics Inc. | 31,253 | |
| SDI LaFarga - Copperworks | Steel Dynamics Inc. | 31,200 | |
| ELKHART COUNTY LANDFILL | Elkhart County, IN | 30,805 | |
| Columbia Gas of Virginia | NiSource | 30,797 | |
| Cargill, Inc | Cargill | 30,373 | |
| POET Biorefining-Cloverdale, LLC | Poet LLC | 29,834 | |
| Columbia Gas of Kentucky | NiSource | 29,343 | |
| Arcosa Lightweight Indiana | Arcosa Inc. | 29,274 | |
| Steel Dynamics | Steel Dynamics Inc. | 28,237 | |
| BF GOODRICH TIRE MANUFACTURING | Michelin | 27,352 | |
| JAY COUNTY LANDFILL | Waste Management Inc. | 27,027 | |
| Consolidated Grain and Barge | Itochu | 27,020 | 50% |
| Consolidated Grain and Barge | Zen-Noh | 27,020 | 50% |
| ALLISON TRANSMISSION, Inc. | Allison Transmission | 26,843 | |
| DECATUR HILLS INCORPORATED | 600 Land Inc. | 26,679 | |
| RANDOLPH FARMS INC | 600 Land Inc. | 26,500 | |
| ENKEI AMERICA INC | Enkei | 26,285 | |
| Hoosier Energy Lawrence Co Station | Hoosier Energy | 25,832 | |
| Jupiter Aluminum Corp | Jupiter Aluminum | 25,389 | |
| Whitewater Valley | INDIANA MUNICIPAL POWER AGENCY | 24,858 | |
| Nucor Fastener Indiana | Nucor | 24,256 | |
| Honda Development & Manufacturing of America, LLC - Indiana Auto Plant | Honda | 24,206 | |
| W.R. Grace | Standard Industries Inc. | 23,792 | |
| Ironside Energy, LLC | SDCL Energy Efficiency Income Trust | 22,782 | |
| HOOSIER LANDFILL | GFL Environmental | 22,597 | |
| ISOLATEK INTERNATIONAL | SK Capital Partners | 21,903 | |
| US NAVY NSWC CRANE DIV | U.S. Government | 21,489 | |
| Solae LLC | International Flavors & Fragrances | 21,043 | |
| CENTERPOINT LANDFILL | Waste Management Inc. | 20,957 | |
| Laubscher Meadows Landfill | Republic Services | 20,511 | |
| International Paper Company - Newport Mill | International Paper | 20,303 | |
| BALL STATE UNIVERSITY | State of Indiana | 19,020 | |
| Southern Indiana Gas & Electric Company | CenterPoint Energy | 18,834 | |
| Gary Sanitary Closed Landfill | City of Gary, IN | 18,343 | |
| DALTON CORP WARSAW MFG FACILITY | Dalton Corp. | 17,940 | |
| MONROE COUNTY LANDFILL | Monroe County, IN | 17,657 | |
| OAK RIDGE RECYCLING & DISPOSAL FACILITY | Waste Management Inc. | 17,428 | |
| Texas Gas Transmission - Dillsboro Station | Loews Corp. | 17,110 | |
| BARTHOLOMEW CO LANDFILL | Bartholomew County, IN | 17,040 | |
| THERMAFIBER INC | Owens Corning | 16,055 | |
| VEOLIA ES BLACKFOOT LANDFILL | Waste Management Inc. | 15,486 | |
| Honeywell Aerospace - South Bend | Honeywell International | 15,145 | |
| UNITED REFUSE LANDFILL | Republic Services | 13,950 | |
| Farbest Foods, Inc. | Farbest Foods Inc. | 13,561 | |
| FCA KOKOMO TRANSMISSION PLANT | Stellantis | 12,312 | |
| CLARK-FLOYD LANDFILL | Clark County, IN | 12,140 | 50% |
| CLARK-FLOYD LANDFILL | Floyd County, IN | 12,140 | 50% |
| EARTHMOVERS LANDFILL | Waste Management Inc. | 11,214 | |
| Matalco Bluffton LLC | Giampaolo Group | 10,648 | 50% |
| Matalco Bluffton LLC | Rio Tinto | 10,648 | 50% |
| ROLLS-ROYCE CORPORATION PLANT 5 & 8 | Rolls-Royce | 8,038 | |
| ANR Pipeline LaGrange CS | TC Energy | 6,125 | |
| DEERCROFT RECYCLING AND DISPOSAL FACILITY (RDF) | Waste Management Inc. | 4,956 | |
| Jasper Municipal Gas Utility | City of Jasper, IN | 536 | |
| City of Rensselaer Gas Utility | City of Rensselaer Gas Utility | 421 | |
| Batesville Water & Gas Utility | Batesville Natural Gas | 388 | |
