Here's what we looked at or considered as possibilities before ruling them out:
- Standard & Poor's NetAdvantage: Offers descriptions of the corporate bonds but no details on who owns them.
- Bloomberg: Doesn't have the specific info needed although it does offer some details on the bonds themselves.
- WRDS: There is a data set in WRDS called FISD (Fixed Income Securities Database) that we don't subscribe to and that isn't likely to have the specific info needed.
- Mergent Online: Also offers specific details on different bonds issued by corporations but not who owns them or in what percentages.
FYI: I found the Business FAQ from the Lippincott Library at U Penn to be a nice starting point in thinking about possible sources of info.