Spade died on June 5 in her New York City home. She was 55 and had a 13-year-old daughter.
Spade was working as an accessories editor at Mademoiselle magazine when she launched her company with husband Andy Spade in 1993.
Andy Spade said the designer suffered depression and anxiety for many years and earlier this month said his wife was regularly seeing a doctor and was taking medication for her condition.
He said he and his wife had been living separately in the 10 months before her death but saw each other or spoke every day. He said they were not legally separated and never discussed divorce.
Coach, now known as Tapestry, bought the Kate Spade brand last year for US$2.4 billion ($3.25b). Kate and Andy Spade recently had started a new handbag company, Frances Valentine.
In lieu of flowers, the family asked for donations to the American Society for the Prevention of Cruelty to Animals or a Kansas City animal shelter.
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