The offer to buy your shares arrives as a single page. You built a quarter of the company over fifteen years, and the letter values your stake at a number that would not cover two good years of the distributions you used to take. The controlling owner calls it generous. His accountant has trimmed it once for your lack of control, trimmed it again because the shares are hard to sell, and used a valuation date that happens to fall right after the worst quarter in the company’s history. The message is that this is the market speaking, and that you should take the number before it falls.
It is not the market speaking. It is a negotiating position dressed up as an appraisal. Illinois does not measure a departing owner’s shares by what a stranger would pay for a powerless slice of a private company. It measures them by fair value, a legal standard with decades of case law behind it, and that standard is usually far kinder to the owner being bought out than the first offer admits. If you are a minority owner staring at a lowball buyout, the law is more on your side than the letter wants you to believe.