You should keep in mind it is in the context of a securitisation, i.e. selling public securities. It's unikely that highly confidential information was shared w

You should keep in mind it is in the context of a securitisation, i.e. selling public securities. It's unikely that highly confidential information was shared with the investors not the least because it's may not be relevant to their investment. My guess, not knowing anything about the transaction, but from what the articles says, is that they may have shared some financials from the persons the planes were leased to, under NDA. And given data leaks, they probably went to all the investors they shared confidential information with in the past and ask them to delete it unless they still need it.