Debevoise & Plimpton, O'Melveny & Myers and Boies Schiller Flexner are among a raft of law firms revealed to be owed money by the Weinstein Company, as the film studio formerly led by disgraced movie mogul Harvey Weinstein files for bankruptcy.

The studio's Chapter 11 filing, which comes weeks after a $500m deal to sell itself fell through amid questions about undisclosed additional debts, states that it has both assets and liabilities of $500m-$1bn, and that it owes nearly $20m to half a dozen law firms.

The company, which has turned to Cravath Swaine & Moore and Delaware law firm Richards Layton & Finger to represent it in bankruptcy court, has also entered into a stalking horse agreement with Lantern Capital Partners for the Dallas-based private equity firm and turnaround specialist to acquire all of its assets.

The company's board of directors said in a statement that its proposed bankruptcy sale is "an important step toward justice for any victims who have been silenced by Harvey Weinstein". As part of that effort, the company also announced that it would void all of its non-disclosure agreements.

Several large law firms appear on a list of the company's 30 largest unsecured creditors. Boies Schiller Flexner, a firm whose work on behalf of Harvey Weinstein has come under intense scrutiny, is listed twice. The US firm is cited as being owed nearly $5.7m as a "film participant vendor", a possible reference to its Boies/Schiller Film Group unit, which has done business with the Weinstein Company, as well as nearly $4.5m for "professional services" rendered to the debtor.

A spokesman for Boies Schiller, which was accused in court papers in December of helping cover up widespread sexual misconduct at the company, did not immediately return a request for comment.

O'Melveny, which was reportedly retained by the Weinstein Company last November when it first began mulling a potential bankruptcy filing, is owed another $3.2m, while Los Angeles law firm Greenberg Glusker Fields Claman & Machtinger is owed $1.82m. Name partner and high-profile Hollywood litigator Bertram Fields dropped the company as a client in December as a result of unpaid legal bills.

Debevoise, where litigation co-chair John Kiernan led a team of lawyers retained by the company last autumn to conduct an internal investigation into the allegations against Weinstein, is owed nearly $1.44m, while Seyfarth Shaw, a firm where employment partner Gerald Maatman was hired to help ward off sexual harassment suits, is owed another $1.11m.

US firm Barnes & Thornburg is owed $859,000, while the company also notes another $2m as being owed to a client trust maintained by Lavely & Singer, an entertainment litigation firm in Los Angeles whose name partner Martin Singer is known for advising prominent individuals in Hollywood.

Cravath, the firm that former Harvey Weinstein counsel David Boies left in 1997 to start Boies Schiller, previously represented the Weinstein Company in litigation over box office releases and a dispute with its namesake. Paul Zumbro, head of Cravath's financial restructuring and reorganisation practice, is working with corporate department managing partner George Zobitz and litigation department managing partner Karin DeMasi on the bankruptcy.