No. The obligation to pay WC is technically a joint obligation between your employer and its insurer, but practically it is the sole obligation of the insurer. WC policies are claims made policies, so that once you filed a claim (you are certain you did, aren't you?) you and that insurer are wedded for the life of the claim. Nothing your employer could do would change that relationship. Some states have guarantee funds so that even if your employer's insurer went out of business, you would still be paid your WCC.
That is not to say you are guaranteed your same employment, or any employment, upon your return to work regardless of whether the company is sold.