| Company | Type | Founded |
|---|---|---|
| Anheuser-Busch | business, enterprise, public company | 1852 |
| Botanical Society of America | nonprofit organization, open-access publisher, professional association | 1893 |
| Build-A-Bear Workshop | business, public company | 1997 |
| Energizer Holdings, Inc. | brand, business, enterprise, public company | 2000 |
| HOK | architectural firm | 1955 |
| McDonnell Aircraft Corporation | aerospace manufacturer | July 6, 1939 |
| McDonnell Douglas | former entity, defense contractor, aerospace manufacturer | 1967 |
| Monsanto | multinational corporation, public company | 1901 |