marketing phone call, page-5

Hi Spartz,
It is not unusual for the underwriter of the issue to phone shareholders to explain the offer and the process required to accept (or decline in some cases) the offer.
The underwriter has to earn their quite substantial fees somehow.
You'll find it is the small shareholders that often have the least understanding. Usually these calls are made by junior brokers as a sought of a marketing tool to get them talking to qualified prospects, so that they have a legitimate excuse to offer their companies research on the company in question, and hopefully begin to build a relationship with the investor leading to future business.
Don't panic, it's a good thing.