| A. R. CRUZEN INVESTMENT COMPANY | — | 0000000938 | 1906-09-01 | Suspended | |
| ACME CONSOLIDATED SILVER-LEAD MINING COMPANY | — | 0000000038 | 1906-08-15 | Suspended | |
| ACME EGG PRESERVING COMPANY, LIMITED | — | 0000000047 | 1906-03-20 | Suspended | |
| ADA COUNTY ABSTRACT COMPANY, LIMITED | — | 0000000074 | 1906-04-04 | Suspended | |
| AEOLIAN COPPER CONSOLIDATED MINING COMPANY, LIMITED | — | 0000000190 | 1906-05-16 | Suspended | |
| AKO LAND AND LIVESTOCK COMPANY, LIMITED | — | 0000000227 | 1906-06-29 | Suspended | |
| ALABAMA, IDAHO MINING AND DEVELOPMENT COMPANY | — | 0000000232 | 1906-04-25 | Suspended | |
| ALAMO COLONY COMPANY, LIMITED | — | 0000000258 | 1906-06-25 | Suspended | |
| ALMO WATER COMPANY (THE) | — | 0000000454 | 1906-06-29 | Active | |
| AMBROSE, INC. | — | 0000013899 | 1906-11-07 | Suspended | |
| AMERICAN FALLS MILLING COMPANY, LIMITED | — | 0000000630 | 1906-08-29 | Suspended | |
| AMERICAN RIDGE METHODIST EPISCOPAL CHURCH | — | 0000000781 | 1906-05-04 | Suspended | |
| AMERICAN TRUST COMPANY | — | 0000000792 | 1906-05-16 | Dissolved | |
| AMIGO MINING COMPANY | — | 0000000804 | 1906-07-27 | Suspended | |
| ARCO LIME-STONE COMPANY, LIMITED | — | 0000000930 | 1906-04-18 | Suspended | |
| ARGENTA MINING COMPANY, LIMITED | — | 0000000941 | 1906-12-10 | Suspended | |
| ASHTON STATE BANK, LIMITED | — | 0000001047 | 1906-03-24 | Suspended | |
| ASHTON TOWNSITE COMPANY | — | 0000001059 | 1906-01-06 | Suspended | |
| ATHOL LUMBER COMPANY | — | 0000001074 | 1906-03-19 | Suspended | ATHOL |
| ATLANTA MERCANTILE COMPANY, LIMITED | — | 0000001114 | 1906-11-05 | Suspended | |
| ATLAS MINING COMPANY, LIMITED | — | 0000001157 | 1906-03-03 | Suspended | |
| ATLAS X CO. | — | 0000004901 | 1906-11-24 | Merged | |
| AUTOMATIC FIELD GLASS COMPANY, LIMITED | — | 0000001206 | 1906-02-13 | Suspended | |
| BAGDAD-CHASE GOLD MINING COMPANY | — | 0000001243 | 1906-10-16 | Suspended | BOISE |
| BAILEY, SIFFERT, GARRETT COMPANY, LIMITED | — | 0000001251 | 1906-12-01 | Suspended | |
| BALLANTYNE MERCANTILE COMPANY, LIMITED | — | 0000001305 | 1906-05-10 | Suspended | |
| BANCROFT CREAMERY COMPANY, LIMITED | — | 0000001327 | 1906-03-29 | Suspended | |
| BANK OF KIMBERLY, LIMITED | — | 0000001411 | 1906-06-05 | Suspended | |
| BANK OF NEZ PERCE | — | 0000001448 | 1906-10-13 | Suspended | |
| BANK OF WASHINGTON COUNTY (THE) | — | 0000001485 | 1906-08-02 | Suspended | |
| BANNER-IDAHO MINING COMPANY | — | 0000001512 | 1906-10-05 | Suspended | MULLAN |
| BANNOCK BREWING COMPANY, LIMITED | — | 0000001549 | 1906-05-17 | Suspended | |
| BANNOCK ENGINEERING COMPANY, LIMITED | — | 0000001555 | 1906-04-18 | Suspended | |
| BANNOCK STAKE OF THE CHURCH OF JESUS CHRIST OF LATTER-DAY SAINTS | — | 0000001569 | 1906-06-25 | Suspended | |
| BARGAIN STORE, LIMITED (THE) | — | 0000001676 | 1906-03-08 | Suspended | |
| BASALT AMUSEMENT COMPANY, LIMITED | — | 0000001690 | 1906-12-19 | Suspended | |
| BASALT, CITY OF | — | 0000151285 | 1906-04-11 | Active | |
| BATTLE CREEK IRRIGATION COMPANY, LTD. | — | 0000001801 | 1906-02-15 | Active | PRESTON |
| BEAR LAKE DRUG COMPANY, LIMITED (THE) | — | 0000001841 | 1906-02-03 | Suspended | |
| BELLEVUE STATE BANK | — | 0000002001 | 1906-09-14 | Suspended | |
| BELSHAZZAR GOLD MINING COMPANY | — | 0000002041 | 1906-07-06 | Suspended | QUARTZBURG |
| BIG FOUR COPPER MINING COMPANY | — | 0000002258 | 1906-10-08 | Suspended | |
| BIG FOUR MINING COMPANY | — | 0000002225 | 1906-09-01 | Suspended | |
| BIG LOST RIVER MILLING COMPANY, LIMITED (THE) | — | 0000002305 | 1906-03-31 | Suspended | |
| BIG WOOD RIVER RESERVOIR AND CANAL COMPANY, LIMITED | — | 0000002311 | 1906-01-13 | Suspended | |
| BISMARK MOUNTAIN GOLD MINING COMPANY | — | 0000002386 | 1906-12-31 | Suspended | CUSTER |
| BLACK TRAVELER COPPER MINING COMPANY | — | 0000002775 | 1906-11-01 | Suspended | |
| BLAINE COUNTY CREAMERY COMPANY, LIMITED (THE) | — | 0000002607 | 1906-01-03 | Suspended | |
| BLAINE COUNTY DEVELOPMENT COMPANY, LIMITED | — | 0000002612 | 1906-08-29 | Suspended | |
| BLUE-BELL MINING COMPANY, LIMITED | — | 0000002558 | 1906-04-18 | Suspended | |