This came as a result of a lunchtime discussion that we realized we needed a broader view on.
Say you did some work last year for a client, Company A. Company A is a small place, but they're good clients, they paid on time, and liked your work. You even put the project you did for them in your portfolio.
Last week, you found out Company A was acquired by much larger (and much more prestigious) Company B. Company B is continuing to use your work, so far as you can tell. Nobody from Company A or Company B has called you since the project was completed last year.
Here's where I and my lunch partner disagreed:
I say it's not truthful to say (in your portfolio, for example) that you did work for Company B. You could say you did work for Company A, "prior to their acquisition by Company B" maybe.
The counter argument to that is that since Company A was so small, and that they now no longer exist anyway, why not just say you did work for Company B? It's the same people doing the same work for a different company. Plus, Company B is continuing to use the work. So why not?