OAKLAND, Calif. -- Golden State Warriors owner Chris Cohan reached an agreement Thursday to sell the franchise for a record $450 million to Boston Celtics minority partner Joe Lacob and Mandalay Entertainment CEO Peter Guber.

"I am incredibly excited to have the opportunity to be the next steward of this storied NBA franchise. This is my dream come true," said Lacob, who is also the managing partner with Kleiner Perkins Caufield & Byers. "Peter and I intend to do what we do best -- innovating and building. It is our passion to return the Warriors to greatness and build nothing short of a championship organization that will make all of us in the Bay Area proud."

Lacob and Guber beat out three other finalists, including Oracle CEO Larry Ellison, who had been considered the favorite to buy the team from Cohan. Ellison has a personal fortune of $28 billion, according to an annual survey by Forbes magazine, and is the sixth-richest man in the world.

He had been courted by Warriors fans at a game earlier this year to buy the struggling franchise, which has made the playoffs only once in the past 16 seasons. Ellison said in a statement that he was surprised he did not win because he made the biggest offer.

"Although I was the highest bidder, Chris Cohan decided to sell to someone else," he said. "In my experience this is a bit unusual. Nonetheless, I wish the Warriors and their fans nothing but success under their new ownership."

Sal Galatioto, the president of Galatioto Sports Partners, which advised Cohan on the sale, said a handshake agreement with Lacob and Guber was agreed to about two weeks ago. The team had four offers of at least $400 million at the time of the deadline.

While the two sides worked out the details, Ellison came back with what Galatioto described as a "marginally higher" offer just hours before the signing.

"He was way past the deadline," Galatioto said. "There was no way I was going to recommend that bid to Chris. ... Once the shot clock expires, are you allowed to get back on the court and have it count? I don't think so."

A league source told ESPN.com's J.A. Adande that Ellison had no one to blame but himself.

"Everybody knows he can afford more than $450 [million]," the source said. "We all know Larry Ellison can buy any team in the league.

"If you know Larry Ellison as a businessman, if you see he paid $6 milion for a company it probably was worth $8 billion. He doesn't pay what people want."

The bid from Lacob and Guber broke the record for the largest sale in league history, topping the $401 million Robert Sarver paid to buy the Phoenix Suns in 2004.

The deal still needs to be approved by three-quarters of the NBA Board of Governors. Lacob also must sell his interest in the Celtics. Galatioto said he expects the deal to be finalized by the end of September.

Lacob, who has been a season-ticket holder for the Warriors, was part of the ownership group with the Celtics when they won their 17th championship two years ago. He has also been involved in sports websites and was the primary investor in the women's American Basketball League in venture capital.

Guber is a producer who helped bring movies such as "Rain Man," "Batman," "Flashdance" and "The Color Purple" to the screen. In 1995, he founded the Mandalay Entertainment Group with partner Paul Schaeffer, who will also be an owner of the team. Mandalay has financed, produced and distributed numerous motion pictures including "Donnie Brasco," "Enemy at the Gates" and "Seven Years in Tibet."