N.H. Rev. Stat. Ann. § 296:41

No person holding stock as executor, administrator, guardian or trustee, and no person holding stock as collateral security, shall be thereby personally subject to any liabilities as a stockholder; but the person pledging the stock shall be so liable, and the estate and funds in the hands of such executor, administrator, guardian or trustee shall be liable to the same extent as a holder thereof in his own right would be liable.