Calamos Strategic Total Return Fund is a closed-end fund that invests in a diversified portfolio of convertible securities and high yield corporate bonds. The fund seeks to provide total return through a combination of capital appreciation and current income. The fund is managed by Calamos Advisors LLC, a global investment firm that specializes in convertible and high yield strategies. Calamos Advisors LLC was founded in 1977 and is headquartered in Naperville, Illinois.