The board of directors has a fiduciary duty to represent the shareholders. That also includes the minority shareholders in your scenario. I think the comment ab

The board of directors has a fiduciary duty to represent the shareholders. That also includes the minority shareholders in your scenario. I think the comment above was just making a general statement of what could happen and in that hypothetical scenario, or even if you make it more extreme, say Elon and co acquire 51% of twitter for $50, and install new board with their majority and then the board decides to go private, selling the full company to Elon for $0.01 per share. Could they do this? Technically, I would say yes. But in reality, they would be sued by the 49% of shareholders and the SEC would probably launch an investigation (which is what OP meant by govt would get involved). On the open market, the board doesn't really have much control over the price, but when it comes to complete buy-outs or mergers, they can set a price and as long as most of the shareholders are happy, it is what it is. I'm sure with this Twitter buyout at $54.20, some people are holding shares that they bought at $60+ last year, and they'll be forced to liquidate those and get the payout, so they won't be too happy, but considering the current price of twitter and it's road map it may be a good price.