The numbers are the largest one-year value gain since Forbes started estimating team prices in 1998.
Just three teams were valued at more than $1 billion on the mag's 2014 list -- the New York Knicks, Los Angeles Lakers and Chicago Bulls. This year, three teams are worth at least $2 billion, while eight others are worth more than $1 billion.
At the top of the list is Los Angeles Lakers with $2.6 billion, followed by the Knicks ($2.5 billion) and the Bulls ($2 billion). Even though Ballmer paid $2 billion for the Clippers, Forbes valued the team at $1.6 billion, fifth among teams, immediately following the fourth-ranked Boston Celtics ($1.7 billion).
The Brooklyn Nets (who are currently on the market) came in sixth at $1.5 billion, followed by the Golden State Warriors ($1.3 billion), Houston Rockets ($1.25 billion), Miami Heat ($1.175 billion), Dallas Mavericks ($1.15 billion) and San Antonio Spurs ($1 billion).
The Atlanta Hawks, who are also currently for sale, are valued at $825 million. Michael Jordan's Charlotte Hornets are valued at $725 million, five years after he paid $275 million to buy the team.
See the full list at Forbes.com.