Musk attorney Edward Micheletti argued that Twitter's lawyers were misinterpreting the court rules. Musk attorneys also say there is no confidential information in Musk's filing that should be withheld from the public.
“Twitter should not be permitted to continue burying the side of the story it does not want publicly disclosed,” Micheletti wrote.
Musk, the world's richest man, agreed in April to buy Twitter and take it private, offering $54.20 a share and vowing to loosen the company's policing of content and to root out fake accounts.
Twitter shares closed Wednesday at $41, well off a 52-week high of $69.81.
Musk, indicated in July that he wanted to back away from the deal, prompting Twitter to file a lawsuit to hold him to the "seller-friendly" agreement.
Musk says Twitter has failed to provide him enough information about the number of fake accounts on its service. Twitter argues that Musk, CEO of electric car maker and solar energy company Tesla Inc., is deliberately trying to tank the deal because market conditions have deteriorated and the acquisition no longer serves his interests.
Either Musk or Twitter would be entitled to a $1 billion breakup fee if the other party is found responsible for the agreement failing. Twitter wants more, however, and is seeking a court order of “specific performance” directing Musk to follow through with the deal.