Without contractual precaution the statutory fallback decides in a dispute.
If there is no rule on exit and compensation, a conflict often leaves only the exit for good cause or the dissolution claim as a last resort. Both routes are lengthy and hard to steer in their outcome. Include pre-emption rights, a right of first refusal and a clear valuation and compensation rule in the articles of association or a shareholders agreement while the relationship is still sound.
An early rule creates predictability and takes the sharpness out of a later dispute.