I would not say you are risk free, particularly if you are travelling for business to your company's head office. Certain types of business activities are since 2015 not considered "work" and don't need a work permit but this is from the department of labour point of view rather than immigration.
Many think this logically implies attending a meeting should also be allowed on a visa exempt entry from an immigration point of view (and that is the common practice, and always had been even before 2015- when there was no hassle over air visa exempt entries anyway). But it is a grey area and there are legal opinions to the contrary (see below).
The safest way to proceed would be to get a non-immigrant business visa. You'll probably be OK with a visa exempt but frequent travellers into Bangkok by air do have a risk of questioning and denial. I wouldn't mention that you are coming to visit your company to immigration. Again, that could be OK, or it could be not- depending on the specific IO.
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