| Business | Phone |
| O'Malley Financial Svc 21 N Ferry Rd, Shelter Island 11964 | (631) 749-1109 |
| Jfs Planning Inc 21 N Ferry Rd, Shelter Island 11964 | (631) 749-7840 |
| Roy H Reeve Agency 55 N Ferry Rd, Shelter Island 11964 | (631) 749-0794 |
| Shelter Island Agency 25 N Ferry Rd, Shelter Island 11964 | (631) 749-1014 |