Swiss companies will have to reveal the combined salaries and bonuses of their board directors for the first time under new corporate governance and listings rules being proposed by SWX, the Swiss exchange.

The proposal on pay disclosure has been added to the latest corporate governance rules by the SWX admission board, which is responsible for listings. The move comes in the wake of the scandal over pensions payments of $100m (€114m) to Percy Barnevik, the former head of ABB, the Swiss-Swedish engineering group.