What follows is a list of pre and post-war companies in the Fallout Universe. Pre-war companies were some of the largest providers of goods and services for the society. None of them survived the Great War intact, but their products and property did, often affecting the lives of the survivors significantly.
Companies are divided according to the three-sector hypothesis, with another heading for corporate brands. Most companies are fictional due to the Divergence, though there are a few real-world companies featuring in the games.
Pre-War companies[]
Primary sector: Raw materials and energy[]
| Name | Industry | Country | Products |
|---|---|---|---|
| Atomic Mining Services | Mining | United States | Ultracite |
| The Bysshe Company | Natural gas | United States | Bio-gas canister |
| Dunwich Borers LLC | Mining | United States | Marble |
| Garrahan Mining Company | Mining | United States | Mining/Robotics |
| GDA Fusion | Energy production | United States | Household fusion generators |
| Hornwright Industrial Mining Company | Mining | United States | Mining/Robotics |
Ken-Gar Mining Company 
|
Mining | United States | Evergreen Mills complex |
| Mass Fusion | Energy production | United States | Fusion wells, Fusion engines, Fusion cores |
| Old Olney Powerworks † | Energy production | United States | |
| Pep Gas | Fuel distribution | United States | Gas/Electric-charging stations |
| Petró-Chico † | Oil industry (excavation, refinement, distribution) | Mexico | Refined oil, gasoline, gas stations |
| Poseidon Energy | Energy production conglomerate | United States | high-tech research & development, Gas stations |
| Poseidon Gasoline † | Petroleum distribution | United States | Gasoline |
| Poseidon Oil † | Petroleum drilling. refinement | United States | Refined oil |
| PPE | Energy conglomerate | United States | |
Prometheus Coal † 
|
Mining | United States | Coal |
| Red Rocket | Fuel distribution | United States | Gasoline, diesel, fusion, automotive service stations |
| Schoelt | Natural gas | United States | Propane fuel |
| Solitare | Fuel distribution | United States | Oil, gas stations |
| Thicket Excavations | Mining | United States | Granite |
| Verdant-Air Wind Power † | Energy production | United States | Wind power generation |
Secondary sector: Manufacturing[]
Tertiary sector: Services[]
Quaternary sector: Knowledge-based[]
Post-war companies[]
After the Great War, all companies before it had gone defunct. But after, many post-war companies sprang up, mostly dealing in trade.
| Name | Industry | Country | Products |
|---|---|---|---|
| Beth's Weapon Shop | Arms industry | Hub | Weapons and ammunition trade |
| Cassidy Caravans | Trading | New California | Trade goods |
| Crimson Caravan Company | Trading | New California | Trade goods, weapons and armor manufacturing |
| Durable Dunn's | Trading | New California | Trade goods |
| Far Go Traders | Trading | New California | Trade goods, armor manufacturing |
| Friendly Lending Company | Finance | New California | Loans |
| Gary's Galley | Restaurant | Rivet City | Food service |
| Griffin Wares | Trading | New California | Trade goods |
| Gun Runners | Arms industry | New California | Weapons, ammunition, and armor manufacturing |
| Happy Trails Caravan Company | Trading | New California | Trade goods |
| Littlehorn & Associates | Mercenary services | Capital Wasteland | Assassinations |
| Mojave Express | Delivery services | New California | Parcel, post, and other types of deliveries |
| Talon Company | Mercenary services | Capital Wasteland | Military operations |
| Water Merchants | Trading | New California | Trade goods |
| Westside Cooperative | Trading | Westside | Produce |
| Diamond City Surplus | Trading | Diamond City | Trade goods |
| Daisy's Discounts | Trading | Goodneighbor | Trade goods |
| Kill or Be Killed | Arms industry | Goodneighbor | Weapons and ammunition trade |
| Memory Den | Goodneighbor | ||
| The Third Rail | Bar | Goodneighbor | Food and drink |
| Power Noodles | Restaurant | Diamond City | Noodles |
| Public Occurrences | Journalism | Diamond City | Newspapers |
| Chem-I-Care | Chems | Diamond City | Chems |
| Swatters | Diamond City | ||
| Commonwealth Weaponry | Arms industry | United States | Weapons and ammunition trade |
Company brands[]
Brands are marks used by companies to identify their products and distinguish them from those of the competition. Many company names double as brands, however, this heading only lists those that are used exclusively as brand names.