When you're editing the form, you can turn off pre-fill on a field by field basis. Click on the company name field and in the properties section on the right, scroll down to the behavior section and you'll see the option to enable or disable pre-fill for that field.
The problem with doing this is now instead of having uniform values for this field, people will be putting in junk data because it will be required. Do you have a way of identifying B2B vs B2C records in Marketo? If you do, I'd recommend setting up visibility rules where if records = B2C, hide the company field, and for everyone else show it.
Thanks for your response. We know that we can make a certain field not be pre-filled, but we don't want to turn it off completely for the B2B leads. The visibility rule could possibly work but the issue is we aren't asking on the form a question/field that we could use to identify a B2C/B2B lead. My initial thought was to include a hidden field and have it pre-filled and base visibility rules off of that, but that doesn't seem like a possibility, right?