#6 Red Bull
Red Bull is the most recent team to enter Formula 1, and they still remain as one of the top teams today. The Austrian team entered the sport in 2005, using a Renault engine up until 2018. They have made a deal with Honda to use their engines from the upcoming 2019 season.
Red Bull have won 4 consecutive Constructors' Championships (2010, 2011, 2012, 2013), making them the first Austrian licensed team to win the Championship.
Red Bull have struggled to cope with the likes of Ferrari and Mercedes, after Sebastian Vettel's exit who won the World Championship from 2010 to 2013.
With Daniel Ricciardo joining Renault, Pierre Gasly from Torro Rosso will be teaming up with the young Max Verstappen. It'll be interesting to see how Red Bull will do with a new engine next season.
#5 Mercedes
Mercedes has been in the F1 scene since 1954 but really gained popularity and success in recent times. Juan Manuel Fangio was the first driver to win World Championships with Mercedes (1954 and 1955), but they failed to win the Constructors' Championship.
Mercedes withdrew from the competition in 1955 but kept supplying engines to various other teams. The German company also supplies engines to Force India and Williams presently. Mercedes have won the Constructors' Championship from 2014-18.
2014, was a record-breaking season for this team, as they beat McLaren's long lasting record of most number of 1-2 finishes in a season (11). Lewis Hamilton and Valtteri Bottas continue to race for this team, but they have also signed Esteban Ocon, from Force India, as their new test driver.