This poll is going by the official and "most heard of" international record labels during ABBA's prime years... not obscure record labels like AMIGA, SEPTIMA, or POP (Taiwan), or distributors such as EMI...
(speculation) if Polar Music was a large company, it would be a subsidiary of EMI due to the fact that EMI's Denmark division was licensed from Polar to distribute it... thus I'm not going to include "distributors" in the poll. (end speculation)
Enough speculation, here are the international record companies that significantly made ABBA the best selling bands of all time: Atlantic Records (USA) Epic Records (Great Britain) Melba/Vogue (France) Polydor (Germany and elsewhere in Europe and Southeast Asia) RCA Victor (Australia, New Zealand, Spanish-speaking countries/territories) Discomate (Japan, duh) Sunshine (South Africa)
I used to like Atlantic Records but now that I've seen the Epic Records pressing of "The Album", it doesn't look bad, but it's more than decent!