| WORD | NAME | DESCRIPTION | |
| CONSULTING | Business Services | 10101515 - Consulting/Business Process Outsourcing Services | Full Description |
| CYCLICALS | Consumer Cyclicals | 20 - Consumer Cyclicals | Full Description |
| CONSUMERGOODS | Consumer Cyclicals | 2010 - Consumer Goods | Full Description |
| CLOTHINGMFR | Consumer Cyclicals | 20101015 - Apparel and Footwear Production | Full Description |
| CANNABISRETAIL | Consumer Cyclicals | 20151540 - Cannabis Dispensary/Retail | Full Description |
| CONSUMERRETAIL | Consumer Cyclicals | 2025 - Consumer Retail | Full Description |
| CLOTHINGACCESSORIESRETAIL | Consumer Cyclicals | 20251015 - Mixed Apparel and Accessories Retail | Full Description |
| CLOTHINGRETAIL | Consumer Cyclicals | 20251020 - Apparel Retail | Full Description |
| CROP | Consumer Non-Cyclicals | 50151015 - Crop Production | Full Description |
| CIGARETTE | Consumer Non-Cyclicals | 50152010 - Cigarette Manufacturing | Full Description |
| CANNABIS | Consumer Non-Cyclicals | 501525 - Cannabis Production Since 2022-07-30, previously part of CROP | Full Description |
| COSMETICS | Consumer Non-Cyclicals | 50202015 - Cosmetics Products | Full Description |
| CLEANING | Consumer Non-Cyclicals | 50202035 - Household Cleaning Products | Full Description |
| CONSUMERSVCE | Consumer Services | 15 - Consumer Services | Full Description |
| CAN | Country IDs | Canada | |
| CYM | Country IDs | Cayman Islands | |
| CHL | Country IDs | Chile | |
| CHN | Country IDs | China | |
| COL | Country IDs | Colombia | |
| CRI | Country IDs | Costa Rica | |
| CIV | Country IDs | Cote d'Ivoire | |
| CUW | Country IDs | Curacao | |
| CYP | Country IDs | Cyprus | |
| CZE | Country IDs | Czech Republic | |
| CHE | Country IDs | Switzerland | |
| COAL | Energy | 251010 - Coal and Uranium Mining | Full Description |
| COALAMER | Energy | 25101010 - Americas Coal Mining | Full Description |
| COALASIA | Energy | 25101015 - Asia/Pacific International Coal Mining | Full Description |
| COALINTL | Energy | 25101020 - Other International Coal Mining | Full Description |
| COALSTREAMING | Energy | 25101040 - Coal Streaming and Royalties | Full Description |
| CREDITUNIONS | Finance | 30102020 - United States Credit Unions Since 2020-07-18 | Full Description |
| CARDIOVASCULAR | Healthcare | 35102010 - Cardiovascular System Biopharmaceuticals | Full Description |
| COMMELECTRIC | Industrials | 40101510 - Commercial and Industrial Electric Products | Full Description |
| CONTROLEQUIP | Industrials | 40102010 - Air, Liquid and Gas Control Equipment | Full Description |
| CONSTRUCTIONMACHINE | Industrials | 40102025 - Natural Resource and Construction Machinery Makers | Full Description |
| CHEM | Non-Energy Materials | 4510 - Chemical, Plastic and Rubber Materials | Full Description |
| CHEMCOMMOD | Non-Energy Materials | 451010 - Commodity Chemicals | Full Description |
| COMMODITYCHEM | Non-Energy Materials | 45101015 - Other Commodity Chemical Manufacturing | Full Description |
| CHEMMIX | Non-Energy Materials | 451015 - Mixed Chemicals | Full Description |
| CHEMSPECIAL | Non-Energy Materials | 451020 - Specialty and Performance Chemicals | Full Description |
| CHEMMFROTHER | Non-Energy Materials | 45102030 - Other Specialty/Performance Chemical Manufacturing | Full Description |
| COMPMAT | Non-Energy Materials | 45202020 - Composite Materials Manufacturing Since 2021-08-21, previously part of MATDIV | Full Description |
| COMPONENTS | Technology | 551010 - Electronic Components | Full Description |
| COMPONENTINTERCONNECT | Technology | 55101010 - Interconnect Electronic Components | Full Description |
| COMPONENTMODULE | Technology | 55101015 - Module and Subassembly Components | Full Description |
| COMPONENTOPTOELECTRONIC | Technology | 55101020 - Optoelectronics Electronic Components | Full Description |
| COMPONENTPASSIVE | Technology | 55101025 - Passive Electronic Components | Full Description |
| COMPONENTDIV | Technology | 55101030 - Diversified Electronic Components | Full Description |
| CONTRACTELECMFR | Technology | 55101510 - Contract Electronic Manufacturing | Full Description |
| COMMERCIALELECTRONICS | Technology | 551510 - Commercial Electronics | Full Description |
| COMMERCEEQUIP | Technology | 55151010 - Commerce Equipment | Full Description |
| COMMERCIALELECTRONICSMFR | Technology | 55151035 - Other Commercial Electronics Manufacturing | Full Description |
| COMMEQUIP | Technology | 551515 - Communications Equipment | Full Description |
| CABLEEQUIP | Technology | 55151515 - Cable Equipment | Full Description |
| COMMEQUIPOTHER | Technology | 55151525 - Other Communications Equipment | Full Description |
| COMPUTER | Technology | 551520 - Computer Hardware and Storage | Full Description |
| COMPUTERSYSTEMS | Technology | 55152015 - Computer Systems | Full Description |
| COMPUTERGEN | Technology | 55152025 - General Computer Hardware | Full Description |
| CONSUMERELECTRONICS | Technology | 551525 - Consumer Electronics | Full Description |
| CONSUMERELECTRONICSACCESS | Technology | 55152520 - Consumer Electronics Accessories Manufacturing | Full Description |
| CONSUMERELECTRONICSGEN | Technology | 55152535 - General Consumer Electronics Manufacturing | Full Description |
| CONSUMERDATA | Technology | 55201010 - Consumer Data and Services | Full Description |