Company buyback of shares and subsequent cancellation. This can be a useful route provided 75% of the shareholders will consent as the Company meets the acquisition cost; however it must have sufficient surplus cash.
If a founder is looking to step aside then perhaps a reorganisation can assist with the variation of rights but retention of financial reward.
An anti-embarrassment clause can operate effectively in any settlement agreement, with the sale price for shares being uplifted if an event such as a sale of the business occurs or funding is received subsequent to exit.
A key to the resolution of a dispute is often an independent valuation of the relevant shareholding. To secure this the parties will need to determine the basis of the valuation.