| SDSteel Dynamics, Inc., Flat Roll Group, the Techs Division, Galvtech Plant | Pittsburgh | 100–499 | ● ACTIVE |
 Alston Machine Co., INC. | Pittsburgh | — | ● ACTIVE |
 Bearing Service Company of Pennsylvania | Pittsburgh | — | ● ACTIVE |
 Conturo Prototyping LLC | Pittsburgh | — | ● ACTIVE |
 Extech/exterior Technologies, INC. | Pittsburgh | — | ● ACTIVE |
 Forms & Surfaces INC | Pittsburgh | — | ● ACTIVE |
 Jersey Chrome Plating Company | Pittsburgh | — | ● ACTIVE |
 Pittsburgh Precision Turned Products, LLC | Pittsburgh | — | ● ACTIVE |
 Ww Patterson CO | Pittsburgh | — | ● ACTIVE |
 Additive Innovations LLC | Pittsburgh | — | ● ACTIVE |
 Goodfellow Corporation | Pittsburgh | — | ● ACTIVE |
 Houston-starr CO | Pittsburgh | — | ● ACTIVE |
 Martin Mechanical Design LLC | Pittsburgh | — | ● ACTIVE |
 Shadow Strategic LLC | Pittsburgh | — | ● ACTIVE |
 Ssm Industries, INC. | Pittsburgh | — | ● ACTIVE |
| UMUber Machining Services LLC | Pittsburgh | — | ● ACTIVE |
 Vacuum Research CORP | Pittsburgh | — | ● ACTIVE |
| MMetaltech/pgh | Pittsburgh | — | ◐ LIKELY ACTIVE |
| NGNeville Galvanizing INC. | Pittsburgh | — | ◇ UNVERIFIED |
| BSBarber Spring Co/pgh | Pittsburgh | — | ◐ LIKELY ACTIVE |
| ASAcme Stamping-wire Forming CO. | Pittsburgh | — | ◇ UNVERIFIED |
| ASAmerican Steel Processing and Systems CO | Pittsburgh | — | ◇ UNVERIFIED |
| BSBearing Service Company | Pittsburgh | — | ◇ UNVERIFIED |
| CMCowan Metal Finishing CO. | Pittsburgh | — | ◇ UNVERIFIED |
| DWDiamond Wire Spring | Pittsburgh | — | ◇ UNVERIFIED |
| HIHall Industries INC. | Pittsburgh | — | ◇ UNVERIFIED |
| HIHanlon-gregory Industries | Pittsburgh | — | ◇ UNVERIFIED |
| HCHeekin Can Incorporated | Pittsburgh | — | ◇ UNVERIFIED |
| KMKerotest Manufacturing CORP. | Pittsburgh | — | ◇ UNVERIFIED |
| PNPittsburgh Nipple Works, INC. | Pittsburgh | — | ◇ UNVERIFIED |
| TEThermo Electron | Pittsburgh | — | ◇ UNVERIFIED |
| BBsp | Pittsburgh | 20–99 | ◐ LIKELY ACTIVE |
| EAEquipment & Assembly | Pittsburgh | 20–99 | ◐ LIKELY ACTIVE |
| KMKerotest Manufacturing Corp. Pittsburgh, PA | Pittsburgh | 20–99 | ◐ LIKELY ACTIVE |
| NDNexgen Design Systems | Pittsburgh | 20–99 | ◐ LIKELY ACTIVE |
| RMR&N Manufacturing, LLC | Pittsburgh | 20–99 | ◐ LIKELY ACTIVE |
| SDSteel Dynamics Flat Roll Group - MetalTech | Pittsburgh | 20–99 | ◐ LIKELY ACTIVE |
| ALAbt, LLC | Pittsburgh | — | ◇ UNVERIFIED |
| AAAll American Grating, INC. | Pittsburgh | — | ◇ UNVERIFIED |
| AMAllegheny Metal Finishing | Pittsburgh | — | ◇ UNVERIFIED |
| ALArcworx, LLC | Pittsburgh | — | ◇ UNVERIFIED |
| DCDiamond Corporation | Pittsburgh | — | ◇ UNVERIFIED |
| ECEnergy Control Systems, INC. | Pittsburgh | — | ◇ UNVERIFIED |
| FMFrank Mance Plating, LLC | Pittsburgh | — | ◇ UNVERIFIED |
| FCFrank's Custom Stainless | Pittsburgh | — | ◇ UNVERIFIED |
| HSHinkel-hofmann Supply Company | Pittsburgh | — | ◇ UNVERIFIED |
| LELee Evans INC. | Pittsburgh | — | ◇ UNVERIFIED |
| LCLub Co | Pittsburgh | — | ◇ UNVERIFIED |
| MIMarstrand Industries, INC. | Pittsburgh | — | ◇ UNVERIFIED |
| MMMatt Machine & Manufacturing, INC. | Pittsburgh | — | ◇ UNVERIFIED |
