Disposition of S stock.
(ii) Disposition of S stock. In general, a trust ceases to be an ESBT on the first day following the day the trust disposes of all S corporation stock. However, if the trust is using the installment method to report income from the sale or disposition of its stock in an S corporation, the trust ceases to be an ESBT on the day following the earlier of the day the last installment payment is received by the trust or the day the trust disposes of the installment obligation.