| Business | Phone |
| Lucinda L Jasper Scholarship 14610 Cambridge Dr, Upper Marlboro 20772 | (301) 780-5313 |
| Nahb Research Ctr 400 Prince Georges Blvd, Upper Marlboro 20774 | (301) 249-4000 |
| Chesapeake Bay Foundation C 11904 Old Marlboro Pike, Upper Marlboro 20772 | (301) 627-4393 |
| Gibbons Foundation 11511 Fenno Rd, Upper Marlboro 20772 | (301) 888-9306 |