The company founded around ABP is Eyeo GmbH: https://eyeo.com/
This is the announcement, from about 4 and a third years ago, about 5 years after Wladimir Palant took over the Adblock Plus project (before, there was no corporate structure around ABP): https://adblockplus.org/blog/introducin ... block-plus
Eyeo also has agreements with those companies whose ads are added to the Acceptable Ads whitelist, which include fees for the larger entities with such agreements, mostly to cover the great expense of maintaining the whitelists and monitoring compliance with the Acceptable Ads criteria: https://adblockplus.org/acceptable-ads
Still, Eyeo is not in danger of being bought by a company with an interest in suppressing ad-blocking, and even if it were the victim of a hostile takeover, ABP is available under the GPL, so a fork free of advertiser influence would quickly gain market-share, and there are also two excellent alternatives (albeit for fewer platforms than ABP supports): uBlock Origin (Firefox, Pale Moon, Chrome, Opera, and OS X Safari) and AdBlock for Chrome, Opera, and OS X Safari.
There's a buzzin' in my brain I really can't explain; I think about it before they make me go to bed.