AJ1G Inc. (AJYG)

[shotsky]

Public companies do not sell shares out of the treasury without an SEC filing first. Nor do they buy them back without a filing. It is shareholders that control the price. Buying or selling large amounts at 'market' can quickly affect the share price. Smart traders use limits for both buying and selling. Some traders decide to get out of a ticker just to get into another one. They might sell at market just to get their money out, especially if they are in the green.
If a large order sells without affecting the price, they have a limit set.