Neb. Rev. Stat. § 44-223

The original incorporators, until the election of directors, and thereafter the directors shall be jointly and severally liable for any losses incurred during the following time or times: (1) For the excess of any policy above the maximum single risks prescribed by section 44-222 during the time that such policy exceeds such maximum single risks; (2) for any losses occurring upon any new risk taken after the expiration of the period designated by the Department of Insurance in accordance with sections 44-120 to 44-124 in which to make good any deficiency; and (3) for all debts and liabilities contracted prior to the time the company received its certificate of authority.