Charter Communications (CHTR) disclosed in an 8-K filing today that controlling investor Paul Allen “has received informal inquiries from various parties regarding potential investments or transactions involving the company.” Charter said it has provided certain material non-public information to those parties under non-disclosure agreements.

Wow, that’s fascinating. Charter, after all is a hugely leveraged cable company, with roughly $20 billion in debt and a market cap of just $366 million. In fact, the company today announced plans to issue $500 million of second lien notes due 2014 to pay down debt under its revolving credit facility. It also plans to borrow another $275 million in term loans under its existing credit facilities. Those funds will also be used to reduce borrowings under the revolving portion of its credit facilities.

Also today, the company announced that CFO Jeffrey Fisher will resign as CFO effective April 4; he will be replaced on an interim basis by Eloise Schmitz, the company’s senior VP for strategic planning.

In previous SEC filings, Paul Allen has said he may consider various kinds of transactions involving Charter, including taking it private, or selling assets.

One possibility that the Street has talked about in the past would be the sale of Charter’s systems in Los Angeles or Dallas/Ft. Worth to Comcast (CMCSA) or Time Warner Cable (TWC).

Today, investors seemed more focused on the new borrowings and the CFO’s departure. Charter is down 1.5 cents, or 1.6%, at 92.5 cents.