| ATAmg Titanium LLC | New Castle | PA | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| BIBpi INC - New Castle Plant | New Castle | PA | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| CWColor Works Painting - Edwards Avenue | New Castle | DE | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
 Superior Forge & Steel CO. | New Castle | PA | Machinery Manufacturing333519 | — | ◇ UNVERIFIED |
| ADAlderman Datsun | New Castle | DE | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| ALAllegheny Ludlum LLC | New Castle | IN | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| ACArch Chemicals INC | New Castle | DE | Chemical Manufacturing325910 | — | ◇ UNVERIFIED |
| APAxion Power Battery Mfg CO | New Castle | PA | Electrical Equipment, Appliance & Component Manufacturing335910 | — | ◇ UNVERIFIED |
| BIBruce Industrial CO INC | New Castle | DE | Chemical Manufacturing325222 | — | ◇ UNVERIFIED |
| CBCastle Bldr Supply New Castle | New Castle | PA | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| CNCmi New Castle Facility | New Castle | PA | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| CCConsolidated Container Lawrence Cnty | New Castle | PA | Plastics and Rubber Products Manufacturing326160 | — | ◇ UNVERIFIED |
| CCCorrado Construction CO LLC | New Castle | DE | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| CUCpi (aka Unisource Worldwide) | New Castle | DE | Plastics and Rubber Products Manufacturing326140 | — | ◇ UNVERIFIED |
| CICytec Industries INC. | New Castle | DE | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| EMEssential Minerals LLC - Lambson Plant | New Castle | DE | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| FPFerguson Perforating CO INC | New Castle | PA | Fabricated Metal Product Manufacturing332119 | — | ◇ UNVERIFIED |
| FSFirst State Fleet Service | New Castle | DE | Computer and Electronic Product Manufacturing334516 | — | ◇ UNVERIFIED |
| HIHalosil International, INC. | New Castle | DE | Chemical Manufacturing325612 | — | ◇ UNVERIFIED |
| HCHardcore Composites | New Castle | DE | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| HDHardcore Dupont Composites | New Castle | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| HHomalite | New Castle | DE | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| IAInvista Applied Research Centre | New Castle | DE | Chemical Manufacturing325222 | — | ◇ UNVERIFIED |
| KRKasgro Rail/new Castle | New Castle | PA | Transportation Equipment Manufacturing336510 | — | ◇ UNVERIFIED |
| KIKennametal Isa | New Castle | PA | Primary Metal Manufacturing331221 | — | ◇ UNVERIFIED |
| LCLaidlaw Corporation | New Castle | DE | Fabricated Metal Product Manufacturing332119 | — | ◇ UNVERIFIED |
| MAMas Air Systems LLC | New Castle | PA | Machinery Manufacturing333413 | — | ◇ UNVERIFIED |
| NCNc-m Chassis Systems, LLC | New Castle | IN | Machinery Manufacturing333924 | — | ◇ UNVERIFIED |
| NCNew Castle Asbestos Site - Former Firestone Plant | New Castle | IN | Transportation Equipment Manufacturing336000 | — | ◇ UNVERIFIED |
| NCNew Castle Foundry/new Castle | New Castle | PA | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| NJNews Journal CO | New Castle | DE | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| NXNordson Xaloy | New Castle | PA | Machinery Manufacturing333249 | — | ◇ UNVERIFIED |
| PCPtfe Compounds INC | New Castle | DE | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| RHRwe Holding CO | New Castle | PA | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| SISelect Industries, INC | New Castle | PA | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| SPSpi Polyols INC. | New Castle | DE | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| SCStandard Chlorine of Delaware, INC. Superfund Site | New Castle | DE | Chemical Manufacturing325100 | — | ◇ UNVERIFIED |
| TDTilcon Delaware, INC. - Terminal Avenue | New Castle | DE | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| UCUS Can Co/new Castle Plant | New Castle | PA | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| WIWalker, Irwin C. Jr Farm | New Castle | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| WLWilmington Leather Coatings | New Castle | DE | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| YIYrc INC. D/b/a Yrc Freight | New Castle | DE | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| ACAam Castings New Castle | New Castle | IN | Transportation Equipment Manufacturing336390 | — | ◇ UNVERIFIED |
| ATAmg Titanium 315 Green Ridge Rd Fac | New Castle | PA | Primary Metal Manufacturing331410 | — | ◇ UNVERIFIED |
| BBBimbo Bakeries Usa, INC. | New Castle | DE | Food Manufacturing311811 | — | ◇ UNVERIFIED |
| BBBlack Briar Investments, LLC | New Castle | DE | Primary Metal Manufacturing331410 | — | ◇ UNVERIFIED |
| BCBlue Chip Tool, INC. | New Castle | PA | Transportation Equipment Manufacturing336612 | — | ◇ UNVERIFIED |
| BHBoars Head Provisions Company Incorporated New Castle North | New Castle | IN | Food Manufacturing311991 | — | ◇ UNVERIFIED |
| BPBrown Printing, LLC | New Castle | IN | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| CPClobus Printing INC. | New Castle | PA | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
