It's absolutely treated as insider info by policy where I work. It might not rise to SEC enforcement action, but if caught you probably won't have a job anymore...
I think most employers wouldn't care at all.
The actual policy wording:
> No Third-Party Trading or Tipping. Do not trade in the securities of another company when aware of material nonpublic information about that company in connection with your work at ******. This includes trading in the stock of ****** suppliers, manufacturers, vendors, or customers, such as cellular network carriers or other channel partners. You must also not tip material nonpublic information about another company.