Company Name Changed Due to Merger/Acquisition

When I started working, my unit was part of one company (Company A) and I received my offer letter from that company. Soon after, there was a merger and the unit became a standalone company (Company B) for about a year, and later that standalone company was fully acquired by a larger company. Throughout all of this, my role, duties, and team remained the same, and my employment was continuous for a total of three years. Because of these changes, my bank statements show three different company names, my offer letter is from the original company, and my experience letter is from the current company, which confirms my full three years of employment from my start date. I’m applying under CEC and all of these corporate changes are public and easily verifiable online. I’m trying to understand whether this should be listed as one employer with an explanation, or split into multiple employers despite the continuous employment. However, I cannot get another experience letter from Company A and B.