The Wilmington Trust Company is a financial institution that was started as a banking, trust, and safe deposit company for the du Pont family and other Delaware wealthy families. It is now a subsidiary of M & T Bank. The records contain some information on the workings of the Trust Department, but are more useful for the information they contain on the individual companies in which the department invested. It includes account reviews, responsibility reviews, and security reviews, but is largely investment analysis files, by company.