Freedom of speech is guaranteed against govt intrusion. It has nothing to do with private organizations. They are not bound by the first amendment at all.
Mis-representation in SEC filingsmakes it a mis-branding in marketing-under-color-of-public-accommodation issue for which their 1st Amendment rights are not a protection.
It's more likely a 14th Amendment issue.
Likely a Civil Rights Act public accommodation issue as well.
Facebook Shuts Down Christian Ideas While Letting Others Post Threats
FReegards!