SAN FRANCISCO (CBS SF) — Talk of a Twitter takeover by Walt Disney Co. is brewing.

After months of speculation that the struggling social media company would be sold, financial sources say Disney is seriously evaluating a possible bid.

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Salesforce.com Inc. has also expressed interest, according to Bloomberg Markets. The San Francisco-based company is “working with Bank of America on the process.”

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Disney already owns ESPN and ABC. Twitter CEO Jack Dorsey has served on on Disney’s board since 2013.

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Twitter is based in San Francisco and valued at $20 billion. Shares rose 3.3% on Monday to $23.37 after news of a possible bid from Salesforce.com.