Apologies, I get testy when I hear 'basher' anymore lol.
Yes CEPSA or whatever the acronym is owns Petresa. Elf Aquitaine, probably a bigger monster, owned 40 percent of CEPSA a few years ago (possibly more, they were acquiring for a while). Elf subsequently merged with some other entity and I forget what they are called now, lol.
They all rather large elephants. However, I have not seen anything on this board that shows any link between ACMG and Petresa.