Good question. Without knowing more, it is hard to say for sure. Generally, however, it will depend on the wording of the judgment (who it is against) and any disbursements that you received personally from the trust.
Hope that this helps, should you require further assistance, my contact information is below and on our website.
It's my opinion that you should list the asset if you are receiving income or principal from the Trust. The asset is not exempt from a judgment creditor and the court could hold you in contempt for not being truthful on Form 1.9777.