Resume - What Do I Put On My Resume When My Company Has Changed Names a Couple Times

Greetings! I have worked for the same company for over 15 years but over the years it has gone through acquisitions and changed names. Not sure what is proper to put on the resume. I don't want to appear to be job hopping because I haven't been. At this time I am just sticking with what the company is currently called. Any thoughts on this? Thanks for sharing your thoughts and opinions. D