Hi Enrico, try the following:
url = 'http://ricercaweb.unibocconi.it/criospatstatdb/csv/rep06a_';
prompt = 'Enter company of interest:';
val = input(prompt,'s');
url = strcat(url,val,'.csv');
options = weboptions('RequestMethod','get','ArrayFormat','csv','ContentType','text');
data = webread(url,options);
disp('CSV formatted data:');
disp('No information found.');
If by 'inserting the name of the company in the search bar' you meant just changing the URL, then the code above should do the trick. Simply specify the term of interest and it will retrieve the data for you.
On the other hand, if you were asking for a code which fills in the HTML form with a POST request, and retrieves the resulting data afterwards with a GET request, some changes would need to be made. Let me know.