| FMFpm-db Metal Finishing | Rockford | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| FLFpm LLC | Itasca | IL | Fabricated Metal Product Manufacturing332811 | — | ◇ UNVERIFIED |
| FSFrancis Screw Products CO INC | Niles | IL | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| FSF & S Engraving INC | Mount Prospect | IL | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| FFFunk Forging CO | Chicago Heights | IL | Fabricated Metal Product Manufacturing332119 | — | ◇ UNVERIFIED |
| FIFutura INC | Chicago | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| GPGalaxy Polishing Plating INC | Wood Dale | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| GIGarbe Iron Works INC | Aurora | IL | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| GCGates CORP | Rockford | IL | Fabricated Metal Product Manufacturing332912 | — | ◇ UNVERIFIED |
| GMGcm Medical & Oem INC | Addison | IL | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| GGemco | Danville | IL | Fabricated Metal Product Manufacturing332618 | — | ◇ UNVERIFIED |
| GCGem Coat INC | Chicago | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| GEGem Equipment & Mfg | Roanoke | IL | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| GAGeneral Automation INC | Skokie | IL | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| GDGeneral Dynamics Ordnance & Tactical Systems INC | Marion | IL | Fabricated Metal Product Manufacturing332992 | — | ◇ UNVERIFIED |
| GDGeneral Dynamics-ots P-area | Marion | IL | Fabricated Metal Product Manufacturing332992 | — | ◇ UNVERIFIED |
| GGGeneral Grind & Machine INC | Aledo | IL | Fabricated Metal Product Manufacturing332721 | — | ◇ UNVERIFIED |
| GPGrafsolve Pressroom | North Chicago | IL | Fabricated Metal Product Manufacturing332618 | — | ◇ UNVERIFIED |
| GCGranite City Pickling & Warehousing | Granite City | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| GCGranite City Pickling & Warehousing INC. | Granite City | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| GIGraph-on INC | Franklin Park | IL | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| GPGravure Process CO | Chicago | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| GGreenlee | Rockford | IL | Fabricated Metal Product Manufacturing332212 | — | ◇ UNVERIFIED |
| GMGreenway Metal Recycling | Chicago | IL | Fabricated Metal Product Manufacturing332618 | — | ◇ UNVERIFIED |
| GPGreg Pelc Electroplating | Lincoln | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| GBGreif Bros CORP Seymour & Peck Div | Chicago | IL | Fabricated Metal Product Manufacturing332439 | — | ◇ UNVERIFIED |
| GFGsi Facility - Paris New | Paris | IL | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| GPGsi Paris Solar Facility | Paris | IL | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| HMHadady Machining CO INC | Lansing | IL | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| HBHandy Button Machine CO | Melrose Park | IL | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| HIHanley Industries | Alton | IL | Fabricated Metal Product Manufacturing332993 | — | ◇ UNVERIFIED |
| HWHarper Wyman CO | Princeton | IL | Fabricated Metal Product Manufacturing332911 | — | ◇ UNVERIFIED |
| HWHasse & Wrede North America | North Aurora | IL | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| HCHaydock Caster CO | Niles | IL | Fabricated Metal Product Manufacturing332510 | — | ◇ UNVERIFIED |
| HEHbm Electrochemical CO | Lansing | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| HMHeadly Mfg | Broadview | IL | Fabricated Metal Product Manufacturing332116 | — | ◇ UNVERIFIED |
| HMHead Manufacturing INC | South Elgin | IL | Fabricated Metal Product Manufacturing332721 | — | ◇ UNVERIFIED |
| HPHenry Pratt CO | Dixon | IL | Fabricated Metal Product Manufacturing332911 | — | ◇ UNVERIFIED |
| HPHenry Pratt CO | Aurora | IL | Fabricated Metal Product Manufacturing332900 | — | ◇ UNVERIFIED |
| HHH H Howard CORP | Chicago | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| HMHighland Machine and Screw Product CO | Highland | IL | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| HFHl Fisher Mfg CO INC | Des Plaines | IL | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| HGHt Gaston CORP | Rockford | IL | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| HIHydroforce INC | Lincolnshire | IL | Fabricated Metal Product Manufacturing332912 | — | ◇ UNVERIFIED |
| ITIllinois Tool Works | Elgin | IL | Fabricated Metal Product Manufacturing332722 | — | ◇ UNVERIFIED |
| IPImh Products INC | Prophetstown | IL | Fabricated Metal Product Manufacturing332116 | — | ◇ UNVERIFIED |
| IIImperial Industrial Finishing Services | Kingston | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| IPImperial Plating CO | Springfield | IL | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| IIIndevcon INC | Elgin | IL | Fabricated Metal Product Manufacturing332618 | — | ◇ UNVERIFIED |
| IFInnovative Fixture Solutions LLC | Rockford | IL | Fabricated Metal Product Manufacturing332618 | — | ◇ UNVERIFIED |
