1. Employee and Employer Contributions
The participant (your ex-spouse) likely made regular employee contributions to the 401(k) account. This portion is usually 100% vested and fully divisible under a QDRO.
However, employer matching or profit-sharing contributions may have different vesting schedules. That means part of the employer contributions may not be fully owned unless certain conditions (like length of service) are met. A properly structured QDRO will make clear whether your award covers only the vested portion or all contributions accrued during the marriage regardless of vesting.

