BIS was founded as a non-profit association where all parents had been members. Due to the growth of the school and therefore the business operations, parents voted for a transformation into a non-profit stock corporation in November 2017. The transformation became effective in April 2018.
Since then, the Directors form the managing board are the legal representatives of the school. Most families are still a shareholder of the corporation. Leaving shareholder regularly transfer their share into the Friends of BIS association, which was established to support BIS fundraising activities. The shareholder meeting elects (honorary) members for the supervisory board who are governing the managing board vote on strategic decisions.
The Supervisory Board meets regularly as a group and operates a series of sub-committees, which meet more frequently, as required.