Why would anyone assume the trust company will settle the estate? If there are named beneficiaries, they should notify the trust companies, provide proof of death and collect. If there are unnamed accounts, someone needs to probate the estate and once they have court recognition, redeem the investments on behalf of the estate and distribute them according to the will. If no one does anything, eventually they will be converted to cash and default to the state in the deceased persons name assuming they are not reclassified due to inactivity to an account status having an exceptionally high management fee designed to wear down the account balances to nothing.