Sorry for not being clear, ill try to explain.
On twitter id like "@companyname" to be added to the end so people can see who the message is originally from, view our twitter profile and then ultimately follow the company.
The social media toolkit is on every news story in our news section so it allows people to share a story that they find interesting.
Therefore just for the Twitter share button id like it, once clicked, to be:
"Title of the news story here {url to the news story} @companyname"
I hope this helps.