Ellis is averaging 21.9 points and 6.0 assists in 37 games for Golden State this season while Udoh is averaging 5.5 points and 3.9 rebounds in 38. The Warriors were playing at Sacramento Tuesday night.
Bogut, who has played more than 66 games just once in seven NBA seasons, is currently out with a fractured left ankle. The Australian averaged 11.3 points and 8.3 rebounds in 12 games before going down, while Jackson averages 10.5 points but hasn't played since February 19.
"We're extremely excited to acquire a player the caliber of Andrew Bogut, who we think is certainly one of the top centers in the NBA," said Warriors general manager Larry Riley. "He will add an element of toughness to our team and will provide us with scoring, rebounding and a defensive presence in the middle. We've lacked those elements in recent years and think that Andrew's addition will be a key factor in the growth of our team."