The ballot is the only lever owners have
A shareholder proposal is the one mechanism by which the people who own a company can put a question to it without buying control. The SEC proposes to remove it.
Owning shares in a public company buys you almost nothing in the way of influence. You cannot call the chief executive, you will not be at the meeting that matters, and your holding is too small to threaten anyone. What you have had, for eighty years, is the right to put one question on the ballot and make the other owners vote on it.
That right is cheap by design, and the cheapness is the point. A proposal costs a pension fund or a parish investor a filing and a few hundred words. Take it away and the same question costs tens of thousands of dollars in printed proxy materials, which means only the people who already have money and access can ask it.
The answer offered is that state law will provide. It will not provide the same thing. States compete for incorporations by offering managers a comfortable home, and the recent movement has been to raise the ownership thresholds a proponent must clear, not to lower them.
Most proposals fail, which is presented as evidence they are a nuisance. It is evidence of the opposite: a mechanism that lets the owners say no cheaply, and occasionally say yes, is a mechanism working exactly as intended. Boards changed course on executive pay, on climate disclosure and on board elections because a vote was coming.
The Commission says this is about its own authority rather than about silencing anyone. Perhaps. The effect is the same either way: the one lever available to small owners is removed, and nothing is put in its place.