| EPElectro-Glass Products, Inc. | Mount Pleasant | PA | Nonmetallic Mineral Product Manufacturing327212 | 20-99 | ◐ LIKELY ACTIVE |
| ECEsterly Concrete Co. Inc. | Sinking Spring | PA | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| GRGilbertsville RMC Plant | Gilbertsville | PA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| GGlassport | Glassport | PA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| GGGMA Garnet Fairless Hill | Fairless Hills | PA | Nonmetallic Mineral Product Manufacturing327910 | 20-99 | ◐ LIKELY ACTIVE |
| GGGma Garnet USA CORP | Fairless Hills | PA | Nonmetallic Mineral Product Manufacturing327910 | — | ◐ LIKELY ACTIVE |
| GGreensburg | Greensburg | PA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| HCHeartland Cement Sales CO | Bethlehem | PA | Nonmetallic Mineral Product Manufacturing327310 | — | ◐ LIKELY ACTIVE |
Isoclima Specialty Glass - Blairsville | Blairsville | PA | Nonmetallic Mineral Product Manufacturing327215 | 20-99 | ◐ LIKELY ACTIVE |
| JMJamestown Macadam, Inc.- Warren Concrete | Warren | PA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| JAJ A & W A Hess Inc. | Hazle Township | PA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| JHJc Howard Concrete LLC | Carnegie | PA | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| JMJDM Materials Company | Huntington Valley | PA | Nonmetallic Mineral Product Manufacturing327320 | 100-499 | ◐ LIKELY ACTIVE |
| JBJdn Block INC Dba Landis Block & Concrete / Nyce Crete Company | Souderton | PA | Nonmetallic Mineral Product Manufacturing327331 | 20-99 | ◐ LIKELY ACTIVE |
| JBJdn Block INC Dba Nyce Crete Company | Lansdale | PA | Nonmetallic Mineral Product Manufacturing327331 | 1-19 | ◐ LIKELY ACTIVE |
| JKJJ Kennedy - Kittanning | Kittanning | PA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| JLJohn Lar- Downingtown | Downingtown | PA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| JLJohn Lar - Morrisville | Fairless Hills | PA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| JPJohn Pomp Studios | Philadelphia | PA | Nonmetallic Mineral Product Manufacturing327212 | 20-99 | ◐ LIKELY ACTIVE |
| KUKelsen, USA | Tarentum | PA | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| KPKutztown Plant | Kutztown | PA | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| LRLeesport RMC Plant | Leesport | PA | Petroleum and Coal Products Manufacturing324121 | 1-19 | ◐ LIKELY ACTIVE |
| LCLens Concrete Services | Jonestown | PA | Nonmetallic Mineral Product Manufacturing327331 | 1-19 | ◐ LIKELY ACTIVE |
| LLetterkenny | Chambersburg | PA | Nonmetallic Mineral Product Manufacturing327390 | 1-19 | ◐ LIKELY ACTIVE |
| LPLewisburg Plant | Lewisburg | PA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| LLimerick | Pottstown | PA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| LPLindy Paving INC | New Galilee | PA | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| LLLittle Lisa INC | Shinglehouse | PA | Nonmetallic Mineral Product Manufacturing327320 | — | ▲ REPORTED CLOSED |
| LLLong Lane, PA | Lancaster | PA | Nonmetallic Mineral Product Manufacturing327991 | 1-19 | ◐ LIKELY ACTIVE |
Magnet Applications, INC. | Du Bois | PA | Nonmetallic Mineral Product Manufacturing327110 | — | ◐ LIKELY ACTIVE |
| MAM and B Redi Mix, INC. | Clarion | PA | Nonmetallic Mineral Product Manufacturing327320 | — | ◐ LIKELY ACTIVE |
| MPMarion Plant | Fombell | PA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| MSMartell Sales Hyde location | Hyde | PA | Nonmetallic Mineral Product Manufacturing327215 | 20-99 | ◐ LIKELY ACTIVE |
| MMMasons Mark Youngwood, PA | Youngwood | PA | Nonmetallic Mineral Product Manufacturing327390 | 1-19 | ◐ LIKELY ACTIVE |
| MCMasters Concrete Products | Kingsley | PA | Nonmetallic Mineral Product Manufacturing327320 | 20-99 | ◐ LIKELY ACTIVE |
| MBmcavoy brick 2019 | Phoenixville | PA | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| MQMDT Quikrete | Paxinos | PA | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| MPMiddleton Properties LLC | Delano | PA | Nonmetallic Mineral Product Manufacturing327999 | — | ◐ LIKELY ACTIVE |
| MMidlothian | Seven Fields | PA | Nonmetallic Mineral Product Manufacturing327992 | 20-99 | ◐ LIKELY ACTIVE |
| MAMorgan Advanced Materials Certech Inc | Wilkes Barre | PA | Nonmetallic Mineral Product Manufacturing327120 | 100-499 | ◐ LIKELY ACTIVE |
| MPMt. Pleasant | Mount Pleasant | PA | Nonmetallic Mineral Product Manufacturing327320 | 1-19 | ◐ LIKELY ACTIVE |
| MSMt Savage Specialty Refractories - Curwensville | Curwensville | PA | Nonmetallic Mineral Product Manufacturing327120 | 20-99 | ◐ LIKELY ACTIVE |
| MSMt Savage Specialty Refractories - Ingomar | Ingomar | PA | Nonmetallic Mineral Product Manufacturing327120 | 1-19 | ◐ LIKELY ACTIVE |
| MPM&W Precast, LLC | Ottsville | PA | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| NCNatural Concrete Products - PA location | East Butler | PA | Nonmetallic Mineral Product Manufacturing327331 | 1-19 | ◐ LIKELY ACTIVE |
| NCNew Castle Plant | New Castle | PA | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| NCNitterhouse Concrete Products | Chambersburg | PA | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| NMNitterhouse Masonry Products | Chambersburg | PA | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| NMNitterhouse Masonry Products- GS | Chambersburg | PA | Nonmetallic Mineral Product Manufacturing327390 | 20-99 | ◐ LIKELY ACTIVE |
| NLNortheast LG | Jessup | PA | Nonmetallic Mineral Product Manufacturing327215 | 100-499 | ◐ LIKELY ACTIVE |