Originally the duo of Mary Nance (November 7, 1947 – November 24, 2019)[2] and Maury Manseau,[3] the group later added the rhythm section of bassist Larry Sims and drummer Merel Bregante and signed to Imperial Records, releasing their debut album in 1967.

[4] The group was discovered by the manager of the Nitty Gritty Dirt Band, Bill McEuen.

By the fall of 1967, the band released their debut LP on Imperial Records, titled Happy Is The Sunshine Company.

There was a proposed fourth album, Think, but the Sunshine Company broke up before recordings were complete.

[6] Nance, born in Champaign, Illinois, resided in San Pedro, California in her later years.