To a point. Beyond a certain point, however, an organization of people can amass the ability to speak at sufficient volume (both in loudness and in quantity) to effectively drown out dissenting voices. Thus, in order to guarantee free speech for the individual, to some degree, the speech of large groups must be kept in check.
Similarly, commercial speech (e.g. advertising) has limits that require a degree of truthfulness.
Clearly you weren't paying a lot of attention to the ads associated with the presidential campaign that just concluded in the US. The Supreme Court was pretty clear in Citizens United opinion (Google it) that an organization's right to free speech/expression cannot be limited by government in the form of limits placed on donor contributions, or how those contributions are used. This case essentially gives any non-corporeal legal entity the protected right to say whatever the hell it wants.
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