Is it permissible to give water, fruit, and food provided by the company to its employees as charity to passersby and other companies, and is it permissible to take food and water out of the company's warehouse for the purpose of giving it as charity?

It is not permissible to dispose of the company's property, whether food or other items, through charity or otherwise, except with its permission. This is because it constitutes an encroachment upon another's property and is forbidden. However, if the company allocates a specific share of water or food to you, then you are permitted to give charity from it.