A "stakeholder" is any party with interest in a company, i.e. owners, employees, investors, vendors, banking creditors, etc. It's the broadest group of interested parties.
Secured Creditors hold collateral in a debt. (loans, revolving lines)
Unsecured Creditors hold NO collateral. (trade lines, vendors)
Shareholders are equity owners of the company. Each share is a very small piece of the ownership pie (the whole). As OWNERS of the company, we are in the same boat as the company itself. If it sinks, we sink. A TRULY bankrupt company has no assets (value), therefore, shares have no value.
YOU are an equity OWNER of Bioamber, albeit an owner with no voice or power. You (we) are simply waiting to see if our equity has value.
Fun huh? :-)