https://www.ineteconomics.org/perspectives/blog/musk-and-tesla-compensation-or-control
其他幾個公司可能沒有這個限製，至少meta肯定是沒有的。小劄精明
“Musk claims that he needs the voting power of 25 percent of Tesla’s outstanding shares to be “influential”, but “at 15% or lower, the for/against ratio to override me makes a takeover by dubious interests too easy.” Musk would have easily attained 25 percent voting power at Tesla had he not sold his shares to buy Twitter.
At most publicly listed companies, a CEO with 50.1 percent of shares outstanding, each with one vote, could hand-pick their board of directors and exercise absolute control over the company’s strategy. Dissenting shareholders would not have sufficient votes to oust the CEO or to challenge their decisions. At Tesla, which has one vote per share but requires a supermajority to confer such power, Musk would need 33.4 percent of the shares outstanding to be, in effect, invulnerable to attack. With 25 percent of shares, Musk would enjoy de facto control of Tesla. Reduced to 13 percent as a result of the Delaware court’s rescission of the 2018 option grant, however, Musk’s strategic control would have been much more vulnerable to shareholder activism.”
