Employee vs. Employer Contributions
The Mastagni Holstedt Apc 401(k) Plan likely includes both employee contributions (made by the account holder) and employer contributions (made by the company). Some employer contributions may be subject to a vesting schedule—meaning the account holder doesn’t fully own them until they’ve worked a certain number of years.
If employer funds are not fully vested as of the cutoff date (usually the date of separation or date of divorce), those unvested amounts might be excluded from the QDRO. A good QDRO makes this clear to avoid disputes later on.

