| 4B Components, Ltd. | 212 |
| A&L Mechanical | 301 |
| Advanced Product Resources LLC | 710 |
| Allen Blasting and Coating | 913 |
| Allied Valve & Instrumentation | 403, 401 |
| All-Trades Industrial Group | 511 |
| Apex Industrial Solutions, Inc. | 304, 302 |
| API Solutions, LLC | 607 |
| Bay West, LLC | 1002 |
| Bearing Headquarters | 701 |
| BG Peterson | 808 |
| BioFuels Automation | 213 |
| BioIntelligence Technologies Inc. | 708, 706 |
| Bulk Conveyors Inc. | 500 |
| BWC | 1006 |
| Central States Group | 709, 707, 705 |
| Chase Nedrow Industries | 203 |
| CL Construction | 811 |
| Classic Industrial Services | 502 |
| CNC Flow Control | 602 |
| Cone Drive Operations | 700 |
| Cooling Tower Depot, Inc. | 703 |
| Cornbelt Industrial | 2005 |
| CPM | 211 |
| Decker Electric, Inc. | 804 |
| DeWine Mechanical | 411 |
| Direct Companies | 803 |
| Dowco Valve Company | 311 |
| Durr CTS, Inc. | 900 |
| DXP Enterprises | 600 |
| EAPC Architects Engineers | 121 |
| EGM, Inc. | 1010 |
| Electro-Sensors, Inc. | 507 |
| Emerson | 407 |
| Emerson Measurement | 405 |
| Enviro-Dyne Industrial Services | 113 |
| Equipment Share | 107 |
| Express Feed and Grain Parts | 410 |
| EXPRO Controls | 2002 |
| Ferguson | 106 |
| Flottweg Separation Tech | 908, 906 |
| Franzenburg Centrifuge | 904, 902 |
| GEA Group | 310 |
| Genesis III | 802 |
| Gracon, LLC | 603 |
| Grain Elevator Repair Products | 110 |
| H2O Innovation | 503 |
| Heat Exchanger Group, Inc. | 2000, 2001 |
| Hengye, Inc. | 605 |
| HTH Companies | 1000 |
| Hupp Electric Motors | 123 |
| Hutcheson Engineering Products, Inc | 1012 |
| Hydro-Thermal Corporation | 800 |
| ICM, Inc. | 204 |
| Industrial electrical services | 909 |
| Industrial Equipment & Parts | 2011 |
| Industrial Kiln & Dryer Group | 116 |
| Industrial Sealing And Lubrication | 912, 910 |
| Innovative Technologies | 2004 |
| Interstates, Inc. | 809 |
| Jasper Engineering & Equipment Company | 120 |
| JMC Industrial Sales | 813 |
| Komline Fluid Quip | 101 |
| L&M Ethanol Maintenance Contracting, Inc. | 117 |
| Larson Engineering, Inc. | 609 |
| LLumin Inc | 115 |
| Malloy Electric | 207 |
| Mapcon Technologies, Inc. | 513 |
| Mason Manufacturing, LLC | 612 |
| Mass Flow Sourcing | 408 |
| McGough Construction | 610 |
| Mec Tec | 713 |
| Mechanical Systems, Inc. | 510 |
| Mid-States Companies | 608 |
| Midwest Cooling Towers, Inc. | 907 |
| Miller Mechanical Specialties, Inc. | 1013, 1011, 1009 |
| NESTEC, LLC | 712 |
| New Age Cryo | 509 |
| NexGen Process Solutions, LLC | 119 |
| NorMinn Industrial, LLC | 201 |
| Northwest Electric | 200 |
| Novaspect, Inc. | 308, 404, 606 |
| O6 Environmental Services | 307, 305 |
| Olsson | 402 |
| One Source Supply | 613 |
| P1 Service, LLC | 2009, 2010 |
| Pioneer Industrial Corporation | 812, 810 |
| Plaas Incorporated | 104 |
| PMT | 412 |
| Precision Rotary Equipment | 303 |
| Premier Industries | 306 |
| Pro Maintenance Inc. | 704 |
| Proflow Pumping Solutions | 413 |
| Rasmussen Air & Gas Energy | 108 |
| Raychem Heat TracingSystems | 711 |
| Refractory Service, Inc. | 805 |
| Renewal Service Industrial (RSI) | 114 |
| RJ Tide Construction Company | 209 |
| Ross HX | 903, 901 |
| Saola Energy, LLC | 2006 |
| Schad Refractory Construction Co. | 504 |
| Schimberg Company | 601 |
| Scott Equipment Company | 210 |
| Seaton Construction Group | 806 |
| Sentrimax Centrifuges Inc. | 300 |
| Separator Technology Solutions | 505 |
| SEPCO Sealing Equipment Products Co., Inc. | 202 |
| Service Tech Cooling Towers | 1004 |
| SES, LLC. Superior Environmental Solutions | 506 |
| SMA LLC | 406 |
| Spraying Systems Co. | 312 |
| Standard Polymers | 2008 |
| Sulzer Chemtech USA Inc. | 118 |
| Sys-Kool Cooling Towers | 905 |
| Team Industrial Services | 2007 |
| The Walling Company | 1007, 1005, 1003, 1001 |
| TMS Johnson | 702 |
| Total Filtration Services | 400 |
| Trackmobile Railcar Movers | 611 |
| Tranter, Inc. | 801 |
| Trident Automation, Inc. | 2003 |
| Trident Process, Inc. | 109 |
| Trucent | 508 |
| TW Industrial Services Inc. | 409 |
| United Plant Services | 105 |
| Van Meter Inc. | 2015, 2016, 2017 |
| Veolia | 205 |
| Vic's Crane & Heavy Haul inc. | 604 |
| Victory Energy Operations, LLC | 1008 |
| Viking Automatic Sprinkler Co. | 501 |
| W.D. Patterson Co., Inc. | 512 |
| WCR Incorporated | 2012, 2013, 2014 |
| Webco Industries, Inc. | 309 |
| Williams Refractory Services, Inc. | 911 |
| Zeeco, Inc. | 122 |
| Zoar Services, LLC | 807 |
| ZOOK Rupture Disks | 313 |