PLC stands for a public limited company while, on the other hand, Ltd stands for private limited company. The public limited company can buy and sell shares through the stock exchange while the shares of the private limited company are sold to their close friends or others, and this can be done through shareholders agree.
In a public limited company, the shares can be transferred easily, while in private limited companies, shares cannot be transferred. Most of the shares in the public limited company are held by the government, while the shares of private limited are not held by the government.
The profit made by the public limited company is less because they are concerned with the good and service for the public while the private limited company makes more profit. Lastly, if something goes wrong with the public limited company, it harms the public, while if something goes wrong with a private limited company, it does not have an adverse effect on the public.