Focusing on those 57 companies doesn’t really address that issue though.
These companies sell fossil fuels. If they actually reduce those sales in any significant way we’d still have to figure out how to get all their customers switched to other fuel sources.
There’s a huge demand for their product so when we go after one of them the others take their place and they’re collectively too big to take on all at once.
The most successful strategy seems to be to make them obsolete. We’ve finally been getting to the point where many renewable energy sources are cheaper than fossil fuels. The other big motivator is fear of the control that oil producing nations might have. There’s some element of individual action but it’s more about government policies and market pressure. Take China or the EU, for example. They’ve been shifting heavily away from fossil fuels. Some of that is likely due to the increasing domestic and international concerns about pollution. They’re also both net oil importers.
That may be boring stuff to most people but it really gets the attention of governments that don’t want to be at the mercy of oil exporters. The kind of attention that gets meaningful laws passed.