The journey to the top of the lambic world for Belle-Vue began in the 1949-1950 season when they began to send lambic across the country and into France and the Netherlands. Belle-Vue, who was at the time the only lambic brewery with filtered and pasteurized gueuze, managed to escape the heatwave that resulted in exploding bottles for the majority of the lambic brewers and blenders that season. Business was so good that the brewery went on to two more takeovers, this time of the [[Brasserie Louis & Emile De Coster]] lambic brewery in 1952 and [[Brouwerij Timmermans|Brouwerij Timmermans]] in 1955.
Constant, who was always involved with the football leagues in Belgium and Europe brought his son, Roger as well as Roger’s cousin Philipe into the business in 1962. Yet again in 1969 Belle-Vue acquired two more breweries: [[Brasserie De Boeck|Brasserie De Boeck]] and [[Brasserie Goossens|Brasserie Goossens]] (known together as [[Brasseries Unies]] (''United Breweries''). These two breweries together had already acquired Brasseries [[Brasserie de la Couronne]] (De Kroon), [[Brasserie Espagne]], [[Brasserie De Coster-Heymans]], and [[Brasserie Vandenkerckhoven]]. Again in 1970 Belle-Vue acquired [[Brasserie Brabrux|Brasserie Brabrux]] which had already acquired other well known lambic breweries [[Brasserie De Keersmaeker]], [[Brasserie Van Haelen-Coche]], [[Bécasse-Steppé]], and [[Brasserie Vandenperre]]. At this point, Belle-Vue controlled approximately 75% of the lambic market. [[Brasserie_De_Neve|Brasserie/Brouwerij De Neve]], whose old brewery building is now a set of luxury apartments was also taken over by Belle-Vue in 1975 <ref name=GeuzeKriek>Jef Van den Steen, [[Books#Geuze & Kriek: The Secret of Lambic Beer|Geuze & Kriek: The Secret of Lambic Beer]], 2012</ref>.
Belle-Vue was riding a wave of success that very few lambic breweries were achieving at the time, but to do this they needed the help of one brewery still bigger than them in Belgium: Artois. Belle-Vue partnered with Artois to help expand its brand in the export market. The cost of this was a 43% minority share for Artois in Belle-Vue with Constant still remaining in charge of Belle-Vue. When Artois merged with Jupiler in 1991 to create Interbrew it effectively put an end to the Vandenstock family stake in Belle-Vue.