I'm just seeing this now. I understand your point about B&C; Holdings  you're right, the link should be piped to exclude "Holdings" if it was not part of the name at the time.

I disagree with you about IATA - it is meaningless to the non-technical reader, and should be spelled out per WP:MOS. Others have made the "click through" argument, but Wikipedia errs on the side of clarity for the reader.

In the case of BEA, putting the acronym after the possessive form is not incorrect, but the sentence can read better rearranged to avoid that construction as you have done in some cases. An alternative is to consider whether the acronym in brackets is needed at all  if "BEA" is not used elsewhere in the article, then it could be left out altogether.

And I apologise again for the blanket revert that I did in error on one article. That was an unfortunate slip of the keyboard that I did not intend.  | t