A system and methods for extracting value from a portfolio of assets, for example a patent portfolio, are described. By granting floating privileges described herein, a portfolio owner can extend an opportunity for obtaining an interest in selected assets from the portfolio to a client who lacks the resources to accumulate and maintain such a portfolio, in return for an annuity stream to the portfolio owner. The floating privilege can take many forms, depending on the needs of the client and the nature of the assets in the portfolio. The privilege is executed for a set of assets selected by the client and approved by the portfolio owner in accordance with a floating privilege agreement controlling the floating privilege.