Co-employment refers to a situation where two or more employers share the same employees. This can happen in a variety of ways, such as when a company hires workers through a staffing agency, when a company uses independent contractors, or when a company is acquired by another company and the employees of the acquired company become employees of the acquiring company.

When co-employment occurs, there can be certain legal and financial implications. For example, both employers may have certain obligations and responsibilities to the employees, such as providing benefits, complying with labor laws, and withholding taxes.

Co-employment can also create confusion and conflict over which employer is responsible for certain actions or decisions related to the employees. To avoid such issues, it's important for the companies involved to have clear agreements and understanding of the responsibilities and liabilities of each employer.

In some cases, co-employment can also have implications for employee classification, as the laws regarding employee classification, such as the Fair Labor Standards Act (FLSA) and state laws, may dictate different obligations for employers depending on whether the employee is considered an employee or an independent contractor.