This is gonna be an interesting question; I hope someone knows the answer.
In perusing several online commercial aircraft censuses, and cross-checking several registrations with the FAA's N-number database, I find that many Boeing aircraft are technically "owned" by WTCI, (actually Wilmington Trust Co., Inc.), which I believe is a bank. Is WTCI the bank Boeing uses for operators to finance new aircraft, or is it a lessor like ILFC, Guiness-Peat, etc.?
What my question boils down to is: Are aircraft owned by WTCI aircraft on which the operator is making payments, or are they leased?