Koos Formsma (born 1957 in Leeuwarden, Friesland) is a Dutch businessman and former chairman of Dutch football club SC Heerenveen. A former field hockey player from HC Bloemendaal, Formsma became the club's chairman on 1 October 2006 after Riemer van der Velde resigned his 23-year spell at the team. Formsma was also director of the company Regma Nederland, located in Lelystad, which he sold to Canon in 2012.
- Bert Kalteren (14 September 2005). "Hockeyman' Koos Formsma wordt nieuwe voorzitter Heerenveen". Friesch Dagblad.
- "Weer een jaar "de boeken in"". 18 October 2006.
- "Heerenveen en PSV komen niet tot scoren".
- "Directeur van Regma wordt nieuwe voorzitter van SC-Heerenveen" (PDF).
- "Watervast en UV-bestendige kleuren". 12 March 2009. Archived from the original on 21 July 2012.
- "Australia May Start without Key Players". New Straits Times. 1 July 1993.
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