Data collected and spreadsheet prepared for a mail merge and email follow up

I have a list of 100 smaller companies in the Thames Valley and their rough location (town/city). The list is attached. I need the names of the CEOs and the company addresses collected and entered into a spreadsheet for a mail merge i.e. the spreadsheet cells must contain consistent data. I also need the telephone numbers of the companies and the personal email of the CEO for a follow up to the mailing. Most of this will be collectable from the web, but you may need to make some phone calls to fill in any gaps.