“It appears that this transaction has now ended,” Ms. Contreras-Sweet said in a statement on Monday, adding that the Weinstein Company’s move had “surprised” her. “While our efforts did not materialize as we had hoped, I am grateful for my investors who saw the compelling value of a women-led board.”

The Weinstein Company declined to comment. In announcing its bankruptcy plans on Sunday, the company’s board said in a statement, “While we recognize that this is an extremely unfortunate outcome for our employees, our creditors and any victims, the board has no choice.” The studio also made public a sharply worded letter that it sent to Ms. Contreras-Sweet and Mr. Burkle on Sunday that blamed her for failing to “keep your promises” about interim funding.

It was in November when Ms. Contreras-Sweet first sent a letter to the board outlining her proposal. “I will be chairwoman of a majority-female board of directors,” she wrote. “Women will be significant investors in the new company and control its voting stock.” She also proposed creating a fund for victims and establishing a mediation process for reaching settlements.

After failing to find other buyers who would keep the studio intact — Lionsgate, Shamrock Capital Advisors, Killer Content and the Qatari company beIN Media Group were among those considering various pieces — the board entered into exclusive negotiations with Ms. Contreras-Sweet’s group in late January.

Most of the studio’s all-male board had quit in early October. Those who remained were Mr. Weinstein’s younger brother, Bob Weinstein; Tarak Ben Ammar, a Franco-Tunisian financier and film producer; and Lance Maerov, an executive at the advertising giant WPP Group.

By Feb. 10, a Saturday, the two sides were finalizing a deal. The Weinstein brothers, who jointly own about 42 percent of the company, would receive no cash from the sale. Other equity holders would also be wiped out. Bob Weinstein, who had been running the studio since the firing of Harvey Weinstein in October, would step down. According to two people briefed on the talks, who spoke on the condition of anonymity to discuss a private process, the Weinstein Company and Ms. Contreras-Sweet’s group were set to formalize the agreement that coming Monday.