Employee vs. Employer Contributions
In most cases, the employee contributions made by the plan participant (your ex-spouse or you) during the marriage are considered community or marital property and should be divided accordingly. However, many 401(k) plans also have employer matching or profit-sharing contributions. These amounts may or may not be fully vested depending on how long the employee has been with the company.
Any unvested employer contributions typically cannot be divided at the time of divorce. It’s critical to include language in the QDRO to specify whether the alternate payee (the non-employee spouse) will receive a portion of any future vesting. Otherwise, that portion may be forfeited later without any recourse.

