Establishments primarily engaged in issuing unit investment trusts or face-amount certificates; and establishments primarily engaged in issuing shares, other than unit investment trusts and face-amount certificate companies, whose shares contain no provision requiring redemption by the company upon request of the security holder. Unit investment trust companies (1) are organized under a trust indenture, contract of custodianship or agency, or similar instrument; (2) do not have a board of directors; and (3) issue only securities redeemable at the request of the security holder, each of which represents an undivided interest in a unit of specified securities, but does not include voting trusts. Face-amount certificates, sometimes referred to as guaranteed face-amount certificates, are essentially obligations of the issuing company to pay a fixed sum at a specified maturity date and usually require periodic payments by the purchaser.