Cuban revealed that he did not help block the Weinsteins' bid last month to take back the Miramax label from Disney.
The Weinsteins founded Miramax in 1979, but sold the studio to Disney for $80 million (55m) in 1993.
Their next startup, the Weinstein Company, was founded with $1 billion in capital but hasn't produced consistent hits. Cuban is an investor in the Weinstein Company.
Speaking on the sidelines of the Produced By Conference, Cuban said he wasn't consulted on the bid for Miramax, but added that Harvey and Bob Weinstein were "better than anybody else" at understanding and selling the company's 600-plus film library.
Miramax's upcoming releases include The Switch, a comedy starring Jennifer Aniston and Jason Bateman, and Last Night, a drama featuring Keira Knightley and Sam Worthington.