| GBGil Berry & Associates, INC. | Mckeesport | — | ◐ LIKELY ACTIVE |
| MGModerne Glass CO INC | Aliquippa | — | ◐ LIKELY ACTIVE |
| 4S43rd St., Inc. | Pittsburgh | 20–99 | ◐ LIKELY ACTIVE |
| APAdvanced Pellet Tech Llc/waynesboro | Waynesboro | — | ◐ LIKELY ACTIVE |
| AHAgy - Huntingdon LLC | Huntingdon | — | ◐ LIKELY ACTIVE |
| AAliquippa | Aliquippa | 1–19 | ◐ LIKELY ACTIVE |
| AMAllegheny Mineral Corp/slippery Rock | Slippery Rock | — | ◐ LIKELY ACTIVE |
| AMAllegheny Mineral Harrisville | Harrisville | — | ◐ LIKELY ACTIVE |
| ACAmerican Colloid Company - York PA | York | 20–99 | ◐ LIKELY ACTIVE |
| ATArconic Tech LLC - Arconic Tech Center | New Kensington | — | ◐ LIKELY ACTIVE |
| ACAssociated Ceramics & Technology Inc | Sarver | 20–99 | ◐ LIKELY ACTIVE |
| APAtlantic Precast Concrete | Tullytown | 20–99 | ◐ LIKELY ACTIVE |
| BSB.C. Stone, Inc. | Everett | 100–499 | ◐ LIKELY ACTIVE |
| BBBeavertown Block CO | Middleburg | — | ◐ LIKELY ACTIVE |
| CCCaddick Construction CO INC | Fort Washington | — | ◐ LIKELY ACTIVE |
| CSCambridge Springs | Cambridge Springs | 1–19 | ◐ LIKELY ACTIVE |
| CGCap Glass Allentown | Northampton | — | ◐ LIKELY ACTIVE |
| CCCemex Construction Materials Atlantic LLC | Wampum | — | ◐ LIKELY ACTIVE |
| CRClassic Rock Fabrication, LLC - Harrisburg | Harrisburg | 20–99 | ◐ LIKELY ACTIVE |
| CGConsolidated Glass Corporation | New Castle | 20–99 | ◐ LIKELY ACTIVE |
| CPCustom Processing Services, LLC | East Greenville | 20–99 | ◐ LIKELY ACTIVE |
| DTDal Tile Gettysburg Boro Plt | Gettysburg | — | ◐ LIKELY ACTIVE |
| DVDelaware Valley Concrete Hatboro Plt | Hatboro | — | ◐ LIKELY ACTIVE |
| DCDu CO Ceramics Co/saxonburg | Saxonburg | — | ◐ LIKELY ACTIVE |
| DFDunmore Facility | Dunmore | — | ◐ LIKELY ACTIVE |
| EMEndless Mountain Minerals LLC | Susquehanna | 20–99 | ◐ LIKELY ACTIVE |
| EAErvin Amasteel-Butler Plant | Butler | 20–99 | ◐ LIKELY ACTIVE |
| EEEvans Eagle Burial Vaults Mfg Leola | Leola | — | ◐ LIKELY ACTIVE |
| FBFizzano Bros | Crum Lynne | — | ◐ LIKELY ACTIVE |
| GTGensimore Trucking/truck Terminal | Pleasant Gap | — | ◐ LIKELY ACTIVE |
| GBGoldbond Building Products--Shippingport | Shippingport | 100–499 | ◐ LIKELY ACTIVE |
Graymont (pa) INC. | Bellefonte | — | ◐ LIKELY ACTIVE |
| HMHeidelberg Materials Ne Braddock Plt | Braddock | — | ◐ LIKELY ACTIVE |
| HMHeidelberg Materials Ne Llc/rich Hill Quarry | Connellsville | — | ◐ LIKELY ACTIVE |
| HMHeidelberg Materials Ne Pittsburgh Plt | Pittsburgh | — | ◐ LIKELY ACTIVE |
| HHHenry H. Ross and Son, INC. | Lititz | 20–99 | ◐ LIKELY ACTIVE |
| HRHess Ready Mix Concrete | Schuylkill Haven | — | ◐ LIKELY ACTIVE |
| JSJoe Squid 2 | New Milford | — | ◐ LIKELY ACTIVE |
| JAJowitt and Rodgers Co/state Rd Fac | Philadelphia | — | ◐ LIKELY ACTIVE |
| KFKeystone Filler & Mfg/muncy Coal Prep Pl | Muncy | — | ◐ LIKELY ACTIVE |
| LPLbv Prof Svc Llc/montoursville Boro Crem | Montoursville | — | ◐ LIKELY ACTIVE |
| LSLigonier Stone & Lime Concrete | Latrobe | 1–19 | ◐ LIKELY ACTIVE |
| MLMercer Lime & Stone CO | Slippery Rock | — | ◐ LIKELY ACTIVE |
| MRMetro Ready Mix & Supply Castor Ave Fac | Philadelphia | — | ◐ LIKELY ACTIVE |
| MIMinteq Intl Mfg | Slippery Rock | — | ◐ LIKELY ACTIVE |
| MMM & M Lime CO | Worthington | — | ◐ LIKELY ACTIVE |
| MGModerne Glass CO INC | Aliquippa | — | ◐ LIKELY ACTIVE |
| MSMt Savage Spec Ref/curwensville Plt | Curwensville | — | ◐ LIKELY ACTIVE |
| M1Multiserv/plt 18 Steelton | Steelton | — | ◐ LIKELY ACTIVE |
| MKMurray Keystone Processing Inc/keystone Cleaning Plt | Indiana | — | ◐ LIKELY ACTIVE |